diff options
| author | Vijay Bellur <vbellur@redhat.com> | 2013-06-18 11:25:39 +0530 |
|---|---|---|
| committer | Anand Avati <avati@redhat.com> | 2013-06-25 10:36:45 -0700 |
| commit | 183546aa2dbfe3371cf155800e2f70057e95e2bc (patch) | |
| tree | 1ffaa80066b451b47c6861aed34f659b220f834a | |
| parent | fb064ec4e302e59aca9ba8a8d97e4cc2d82d31ef (diff) | |
doc: Move admin-guide to markdown format.
Editing markdown is probably more easier than xml.
pandoc can then be used for conversion to html, pdf and any other necessary
formats. Note that pandoc has the following input and output formats:
Input: markdown and (subsets of) Textile, reStructuredText, HTML, LaTeX, and
DocBook XML.
Output:plain text, markdown, reStructuredText, XHTML, HTML 5, LaTeX
(including beamer slide shows), ConTeXt, RTF, DocBook XML, OpenDocument XML,
ODT, Word docx, GNU Texinfo, MediaWiki markup, EPUB, Textile, groff man pages,
Emacs Org-Mode, AsciiDoc, and Slidy, Slideous, DZSlides, or S5 HTML slide shows.
It can also pro‐ duce PDF output on systems where LaTeX is installed.
All documentation changes can be submitted as changes to markdown and we can
attempt a periodic documentation refresh on gluster.org.
Change-Id: I5dcf7f79184cd6b6d62ce7065d2faa352622f6ac
Reviewed-on: http://review.gluster.org/5232
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>
Tested-by: Anand Avati <avati@redhat.com>
22 files changed, 6345 insertions, 0 deletions
diff --git a/doc/admin-guide/en-US/markdown/Administration_Guide.md b/doc/admin-guide/en-US/markdown/Administration_Guide.md new file mode 100644 index 00000000000..8b137891791 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/Administration_Guide.md @@ -0,0 +1 @@ + diff --git a/doc/admin-guide/en-US/markdown/Author_Group.md b/doc/admin-guide/en-US/markdown/Author_Group.md new file mode 100644 index 00000000000..ef2a5e677fe --- /dev/null +++ b/doc/admin-guide/en-US/markdown/Author_Group.md @@ -0,0 +1,5 @@ +Divya +Muntimadugu +Red Hat +Engineering Content Services +divya@redhat.com diff --git a/doc/admin-guide/en-US/markdown/Book_Info.md b/doc/admin-guide/en-US/markdown/Book_Info.md new file mode 100644 index 00000000000..8b137891791 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/Book_Info.md @@ -0,0 +1 @@ + diff --git a/doc/admin-guide/en-US/markdown/Chapter.md b/doc/admin-guide/en-US/markdown/Chapter.md new file mode 100644 index 00000000000..8420259c439 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/Chapter.md @@ -0,0 +1,18 @@ +Test Chapter +============ + +This is a test paragraph + +Test Section 1 +============== + +This is a test paragraph in a section + +Test Section 2 +============== + +This is a test paragraph in Section 2 + +1. listitem text + + diff --git a/doc/admin-guide/en-US/markdown/Preface.md b/doc/admin-guide/en-US/markdown/Preface.md new file mode 100644 index 00000000000..f7e934ae84b --- /dev/null +++ b/doc/admin-guide/en-US/markdown/Preface.md @@ -0,0 +1,22 @@ +Preface +======= + +This guide describes how to configure, operate, and manage Gluster File +System (GlusterFS). + +Audience +======== + +This guide is intended for Systems Administrators interested in +configuring and managing GlusterFS. + +This guide assumes that you are familiar with the Linux operating +system, concepts of File System, GlusterFS concepts, and GlusterFS +Installation + +License +======= + +The License information is available at [][]. + + []: http://www.redhat.com/licenses/rhel_rha_eula.html diff --git a/doc/admin-guide/en-US/markdown/Revision_History.md b/doc/admin-guide/en-US/markdown/Revision_History.md new file mode 100644 index 00000000000..2084309d195 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/Revision_History.md @@ -0,0 +1,4 @@ +Revision History +================ + +1-0 Thu Apr 5 2012 Divya Muntimadugu <divya@redhat.com> Draft diff --git a/doc/admin-guide/en-US/markdown/admin_ACLs.md b/doc/admin-guide/en-US/markdown/admin_ACLs.md new file mode 100644 index 00000000000..308e069ca50 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_ACLs.md @@ -0,0 +1,197 @@ +POSIX Access Control Lists +========================== + +POSIX Access Control Lists (ACLs) allows you to assign different +permissions for different users or groups even though they do not +correspond to the original owner or the owning group. + +For example: User john creates a file but does not want to allow anyone +to do anything with this file, except another user, antony (even though +there are other users that belong to the group john). + +This means, in addition to the file owner, the file group, and others, +additional users and groups can be granted or denied access by using +POSIX ACLs. + +Activating POSIX ACLs Support +============================= + +To use POSIX ACLs for a file or directory, the partition of the file or +directory must be mounted with POSIX ACLs support. + +Activating POSIX ACLs Support on Sever +-------------------------------------- + +To mount the backend export directories for POSIX ACLs support, use the +following command: + +`# mount -o acl ` + +For example: + +`# mount -o acl /dev/sda1 /export1 ` + +Alternatively, if the partition is listed in the /etc/fstab file, add +the following entry for the partition to include the POSIX ACLs option: + +`LABEL=/work /export1 ext3 rw, acl 14 ` + +Activating POSIX ACLs Support on Client +--------------------------------------- + +To mount the glusterfs volumes for POSIX ACLs support, use the following +command: + +`# mount –t glusterfs -o acl ` + +For example: + +`# mount -t glusterfs -o acl 198.192.198.234:glustervolume /mnt/gluster` + +Setting POSIX ACLs +================== + +You can set two types of POSIX ACLs, that is, access ACLs and default +ACLs. You can use access ACLs to grant permission for a specific file or +directory. You can use default ACLs only on a directory but if a file +inside that directory does not have an ACLs, it inherits the permissions +of the default ACLs of the directory. + +You can set ACLs for per user, per group, for users not in the user +group for the file, and via the effective right mask. + +Setting Access ACLs +------------------- + +You can apply access ACLs to grant permission for both files and +directories. + +**To set or modify Access ACLs** + +You can set or modify access ACLs use the following command: + +`# setfacl –m file ` + +The ACL entry types are the POSIX ACLs representations of owner, group, +and other. + +Permissions must be a combination of the characters `r` (read), `w` +(write), and `x` (execute). You must specify the ACL entry in the +following format and can specify multiple entry types separated by +commas. + + ACL Entry Description + ---------------------- -------------------------------------------------------------------------------------------------------------------------------------------------- + u:uid:\<permission\> Sets the access ACLs for a user. You can specify user name or UID + g:gid:\<permission\> Sets the access ACLs for a group. You can specify group name or GID. + m:\<permission\> Sets the effective rights mask. The mask is the combination of all access permissions of the owning group and all of the user and group entries. + o:\<permission\> Sets the access ACLs for users other than the ones in the group for the file. + +If a file or directory already has an POSIX ACLs, and the setfacl +command is used, the additional permissions are added to the existing +POSIX ACLs or the existing rule is modified. + +For example, to give read and write permissions to user antony: + +`# setfacl -m u:antony:rw /mnt/gluster/data/testfile ` + +Setting Default ACLs +-------------------- + +You can apply default ACLs only to directories. They determine the +permissions of a file system objects that inherits from its parent +directory when it is created. + +To set default ACLs + +You can set default ACLs for files and directories using the following +command: + +`# setfacl –m –-set ` + +For example, to set the default ACLs for the /data directory to read for +users not in the user group: + +`# setfacl –m --set o::r /mnt/gluster/data ` + +> **Note** +> +> An access ACLs set for an individual file can override the default +> ACLs permissions. + +**Effects of a Default ACLs** + +The following are the ways in which the permissions of a directory's +default ACLs are passed to the files and subdirectories in it: + +- A subdirectory inherits the default ACLs of the parent directory + both as its default ACLs and as an access ACLs. + +- A file inherits the default ACLs as its access ACLs. + +Retrieving POSIX ACLs +===================== + +You can view the existing POSIX ACLs for a file or directory. + +**To view existing POSIX ACLs** + +- View the existing access ACLs of a file using the following command: + + `# getfacl ` + + For example, to view the existing POSIX ACLs for sample.jpg + + # getfacl /mnt/gluster/data/test/sample.jpg + # owner: antony + # group: antony + user::rw- + group::rw- + other::r-- + +- View the default ACLs of a directory using the following command: + + `# getfacl ` + + For example, to view the existing ACLs for /data/doc + + # getfacl /mnt/gluster/data/doc + # owner: antony + # group: antony + user::rw- + user:john:r-- + group::r-- + mask::r-- + other::r-- + default:user::rwx + default:user:antony:rwx + default:group::r-x + default:mask::rwx + default:other::r-x + +Removing POSIX ACLs +=================== + +To remove all the permissions for a user, groups, or others, use the +following command: + +`# setfacl -x ` + +For example, to remove all permissions from the user antony: + +`# setfacl -x u:antony /mnt/gluster/data/test-file` + +Samba and ACLs +============== + +If you are using Samba to access GlusterFS FUSE mount, then POSIX ACLs +are enabled by default. Samba has been compiled with the +`--with-acl-support` option, so no special flags are required when +accessing or mounting a Samba share. + +NFS and ACLs +============ + +Currently we do not support ACLs configuration through NFS, i.e. setfacl +and getfacl commands do not work. However, ACLs permissions set using +Gluster Native Client is applicable on NFS mounts. diff --git a/doc/admin-guide/en-US/markdown/admin_Hadoop.md b/doc/admin-guide/en-US/markdown/admin_Hadoop.md new file mode 100644 index 00000000000..2894fa71302 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_Hadoop.md @@ -0,0 +1,170 @@ +Managing Hadoop Compatible Storage +================================== + +GlusterFS provides compatibility for Apache Hadoop and it uses the +standard file system APIs available in Hadoop to provide a new storage +option for Hadoop deployments. Existing MapReduce based applications can +use GlusterFS seamlessly. This new functionality opens up data within +Hadoop deployments to any file-based or object-based application. + +Architecture Overview +===================== + +The following diagram illustrates Hadoop integration with GlusterFS: + +Advantages +========== + +The following are the advantages of Hadoop Compatible Storage with +GlusterFS: + +- Provides simultaneous file-based and object-based access within + Hadoop. + +- Eliminates the centralized metadata server. + +- Provides compatibility with MapReduce applications and rewrite is + not required. + +- Provides a fault tolerant file system. + +Preparing to Install Hadoop Compatible Storage +============================================== + +This section provides information on pre-requisites and list of +dependencies that will be installed during installation of Hadoop +compatible storage. + +Pre-requisites +-------------- + +The following are the pre-requisites to install Hadoop Compatible +Storage : + +- Hadoop 0.20.2 is installed, configured, and is running on all the + machines in the cluster. + +- Java Runtime Environment + +- Maven (mandatory only if you are building the plugin from the + source) + +- JDK (mandatory only if you are building the plugin from the source) + +- getfattr - command line utility + +Installing, and Configuring Hadoop Compatible Storage +===================================================== + +This section describes how to install and configure Hadoop Compatible +Storage in your storage environment and verify that it is functioning +correctly. + +1. Download `glusterfs-hadoop-0.20.2-0.1.x86_64.rpm` file to each + server on your cluster. You can download the file from [][]. + +2. To install Hadoop Compatible Storage on all servers in your cluster, + run the following command: + + `# rpm –ivh --nodeps glusterfs-hadoop-0.20.2-0.1.x86_64.rpm` + + The following files will be extracted: + + - /usr/local/lib/glusterfs-Hadoop-version-gluster\_plugin\_version.jar + + - /usr/local/lib/conf/core-site.xml + +3. (Optional) To install Hadoop Compatible Storage in a different + location, run the following command: + + `# rpm –ivh --nodeps –prefix /usr/local/glusterfs/hadoop glusterfs-hadoop- 0.20.2-0.1.x86_64.rpm` + +4. Edit the `conf/core-site.xml` file. The following is the sample + `conf/core-site.xml` file: + + <configuration> + <property> + <name>fs.glusterfs.impl</name> + <value>org.apache.hadoop.fs.glusterfs.Gluster FileSystem</value> + </property> + + <property> + <name>fs.default.name</name> + <value>glusterfs://fedora1:9000</value> + </property> + + <property> + <name>fs.glusterfs.volname</name> + <value>hadoopvol</value> + </property> + + <property> + <name>fs.glusterfs.mount</name> + <value>/mnt/glusterfs</value> + </property> + + <property> + <name>fs.glusterfs.server</name> + <value>fedora2</value> + </property> + + <property> + <name>quick.slave.io</name> + <value>Off</value> + </property> + </configuration> + + The following are the configurable fields: + + ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + Property Name Default Value Description + ---------------------- -------------------------- --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + fs.default.name glusterfs://fedora1:9000 Any hostname in the cluster as the server and any port number. + + fs.glusterfs.volname hadoopvol GlusterFS volume to mount. + + fs.glusterfs.mount /mnt/glusterfs The directory used to fuse mount the volume. + + fs.glusterfs.server fedora2 Any hostname or IP address on the cluster except the client/master. + + quick.slave.io Off Performance tunable option. If this option is set to On, the plugin will try to perform I/O directly from the disk file system (like ext3 or ext4) the file resides on. Hence read performance will improve and job would run faster. + > **Note** + > + > This option is not tested widely + ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + +5. Create a soft link in Hadoop’s library and configuration directory + for the downloaded files (in Step 3) using the following commands: + + `# ln -s >` + + For example, + + `# ln –s /usr/local/lib/glusterfs-0.20.2-0.1.jar /lib/glusterfs-0.20.2-0.1.jar` + + `# ln –s /usr/local/lib/conf/core-site.xml /conf/core-site.xml ` + +6. (Optional) You can run the following command on Hadoop master to + build the plugin and deploy it along with core-site.xml file, + instead of repeating the above steps: + + `# build-deploy-jar.py -d -c ` + +Starting and Stopping the Hadoop MapReduce Daemon +================================================= + +To start and stop MapReduce daemon + +- To start MapReduce daemon manually, enter the following command: + + `# /bin/start-mapred.sh` + +- To stop MapReduce daemon manually, enter the following command: + + `# /bin/stop-mapred.sh ` + +> **Note** +> +> You must start Hadoop MapReduce daemon on all servers. + + []: http://download.gluster.com/pub/gluster/glusterfs/qa-releases/3.3-beta-2/glusterfs-hadoop-0.20.2-0.1.x86_64.rpm diff --git a/doc/admin-guide/en-US/markdown/admin_UFO.md b/doc/admin-guide/en-US/markdown/admin_UFO.md new file mode 100644 index 00000000000..ed65d5ee794 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_UFO.md @@ -0,0 +1,1219 @@ +Managing Unified File and Object Storage +======================================== + +Unified File and Object Storage (UFO) unifies NAS and object storage +technology. It provides a system for data storage that enables users to +access the same data, both as an object and as a file, thus simplifying +management and controlling storage costs. + +Unified File and Object Storage is built upon Openstack's Object Storage +Swift. Open Stack Object Storage allows users to store and retrieve +files and content through a simple Web Service (REST: Representational +State Transfer) interface as objects and GlusterFS, allows users to +store and retrieve files using Native Fuse and NFS mounts. It uses +GlusterFS as a backend file system for Open Stack Swift. It also +leverages on Open Stack Swift's web interface for storing and retrieving +files over the web combined with GlusterFS features like scalability and +high availability, replication, elastic volume management for data +management at disk level. + +Unified File and Object Storage technology enables enterprises to adopt +and deploy cloud storage solutions. It allows users to access and modify +data as objects from a REST interface along with the ability to access +and modify files from NAS interfaces including NFS and CIFS. In addition +to decreasing cost and making it faster and easier to access object +data, it also delivers massive scalability, high availability and +replication of object storage. Infrastructure as a Service (IaaS) +providers can utilize GlusterFS Unified File and Object Storage +technology to enable their own cloud storage service. Enterprises can +use this technology to accelerate the process of preparing file-based +applications for the cloud and simplify new application development for +cloud computing environments. + +OpenStack Object Storage is scalable object storage system and it is not +a traditional file system. You will not be able to mount this system +like traditional SAN or NAS volumes and perform POSIX compliant +operations. + +Components of Object Storage +============================ + +The major components of Object Storage are: + +**Proxy Server** + +All REST requests to the UFO are routed through the Proxy Server. + +**Objects and Containers** + +An object is the basic storage entity and any optional metadata that +represents the data you store. When you upload data, the data is stored +as-is (with no compression or encryption). + +A container is a storage compartment for your data and provides a way +for you to organize your data. Containers can be visualized as +directories in a Linux system. Data must be stored in a container and +hence objects are created within a container. + +It implements objects as files and directories under the container. The +object name is a '/' separated path and UFO maps it to directories until +the last name in the path, which is marked as a file. With this +approach, objects can be accessed as files and directories from native +GlusterFS (FUSE) or NFS mounts by providing the '/' separated path. + +**Accounts and Account Servers** + +The OpenStack Object Storage system is designed to be used by many +different storage consumers. Each user is associated with one or more +accounts and must identify themselves using an authentication system. +While authenticating, users must provide the name of the account for +which the authentication is requested. + +UFO implements accounts as GlusterFS volumes. So, when a user is granted +read/write permission on an account, it means that that user has access +to all the data available on that GlusterFS volume. + +**Authentication and Access Permissions** + +You must authenticate against an authentication service to receive +OpenStack Object Storage connection parameters and an authentication +token. The token must be passed in for all subsequent container or +object operations. One authentication service that you can use as a +middleware example is called `tempauth`. + +By default, each user has their own storage account and has full access +to that account. Users must authenticate with their credentials as +described above, but once authenticated they can manage containers and +objects within that account. If a user wants to access the content from +another account, they must have API access key or a session token +provided by their authentication system. + +Advantages of using GlusterFS Unified File and Object Storage +============================================================= + +The following are the advantages of using GlusterFS UFO: + +- No limit on upload and download files sizes as compared to Open + Stack Swift which limits the object size to 5GB. + +- A unified view of data across NAS and Object Storage technologies. + +- Using GlusterFS's UFO has other advantages like the following: + + - High availability + + - Scalability + + - Replication + + - Elastic Volume management + +Preparing to Deploy Unified File and Object Storage +=================================================== + +This section provides information on pre-requisites and list of +dependencies that will be installed during the installation of Unified +File and Object Storage. + +Pre-requisites +-------------- + +GlusterFS's Unified File and Object Storage needs `user_xattr` support +from the underlying disk file system. Use the following command to +enable `user_xattr` for GlusterFS bricks backend: + +`# mount –o remount,user_xattr ` + +For example, + +`# mount –o remount,user_xattr /dev/hda1 ` + +Dependencies +------------ + +The following packages are installed on GlusterFS when you install +Unified File and Object Storage: + +- curl + +- memcached + +- openssl + +- xfsprogs + +- python2.6 + +- pyxattr + +- python-configobj + +- python-setuptools + +- python-simplejson + +- python-webob + +- python-eventlet + +- python-greenlet + +- python-pastedeploy + +- python-netifaces + +Installing and Configuring Unified File and Object Storage +========================================================== + +This section provides instructions on how to install and configure +Unified File and Object Storage in your storage environment. + +Installing Unified File and Object Storage +------------------------------------------ + +To install Unified File and Object Storage: + +1. Download `rhel_install.sh` install script from [][] . + +2. Run `rhel_install.sh` script using the following command: + + `# sh rhel_install.sh` + +3. Download `swift-1.4.5-1.noarch.rpm` and + `swift-plugin-1.0.-1.el6.noarch.rpm` files from [][]. + +4. Install `swift-1.4.5-1.noarch.rpm` and + `swift-plugin-1.0.-1.el6.noarch.rpm` using the following commands: + + `# rpm -ivh swift-1.4.5-1.noarch.rpm` + + `# rpm -ivh swift-plugin-1.0.-1.el6.noarch.rpm` + + > **Note** + > + > You must repeat the above steps on all the machines on which you + > want to install Unified File and Object Storage. If you install + > the Unified File and Object Storage on multiple servers, you can + > use a load balancer like pound, nginx, and so on to distribute the + > request across the machines. + +Adding Users +------------ + +The authentication system allows the administrator to grant different +levels of access to different users based on the requirement. The +following are the types of user permissions: + +- admin user + +- normal user + +Admin user has read and write permissions on the account. By default, a +normal user has no read or write permissions. A normal user can only +authenticate itself to get a Auth-Token. Read or write permission are +provided through ACLs by the admin users. + +Add a new user by adding the following entry in +`/etc/swift/proxy-server.conf` file: + +`user_<account-name>_<user-name> = <password> [.admin]` + +For example, + +`user_test_tester = testing .admin` + +> **Note** +> +> During installation, the installation script adds few sample users to +> the `proxy-server.conf` file. It is highly recommended that you remove +> all the default sample user entries from the configuration file. + +For more information on setting ACLs, see ?. + +Configuring Proxy Server +------------------------ + +The Proxy Server is responsible for connecting to the rest of the +OpenStack Object Storage architecture. For each request, it looks up the +location of the account, container, or object in the ring and route the +request accordingly. The public API is also exposed through the proxy +server. When objects are streamed to or from an object server, they are +streamed directly through the proxy server to or from the user – the +proxy server does not spool them. + +The configurable options pertaining to proxy server are stored in +`/etc/swift/proxy-server.conf`. The following is the sample +`proxy-server.conf` file: + + [app:proxy-server] + use = egg:swift#proxy + allow_account_management=true + account_autocreate=true + + [filter:tempauth] + use = egg:swift#tempauth user_admin_admin=admin.admin.reseller_admin + user_test_tester=testing.admin + user_test2_tester2=testing2.admin + user_test_tester3=testing3 + + [filter:healthcheck] + use = egg:swift#healthcheck + + [filter:cache] + use = egg:swift#memcache + +By default, GlusterFS's Unified File and Object Storage is configured to +support HTTP protocol and uses temporary authentication to authenticate +the HTTP requests. + +Configuring Authentication System +--------------------------------- + +Proxy server must be configured to authenticate using ` + + `. + +Configuring Proxy Server for HTTPS +---------------------------------- + +By default, proxy server only handles HTTP request. To configure the +proxy server to process HTTPS requests, perform the following steps: + +1. Create self-signed cert for SSL using the following commands: + + cd /etc/swift + openssl req -new -x509 -nodes -out cert.crt -keyout cert.key + +2. Add the following lines to `/etc/swift/proxy-server.conf `under + [DEFAULT] + + bind_port = 443 + cert_file = /etc/swift/cert.crt + key_file = /etc/swift/cert.key + +3. Restart the servers using the following commands: + + swift-init main stop + swift-init main start + +The following are the configurable options: + + Option Default Description + ------------ ------------ ------------------------------- + bind\_ip 0.0.0.0 IP Address for server to bind + bind\_port 80 Port for server to bind + swift\_dir /etc/swift Swift configuration directory + workers 1 Number of workers to fork + user swift swift user + cert\_file Path to the ssl .crt + key\_file Path to the ssl .key + + : proxy-server.conf Default Options in the [DEFAULT] section + + Option Default Description + ------------------------------- ----------------- ----------------------------------------------------------------------------------------------------------- + use paste.deploy entry point for the container server. For most cases, this should be `egg:swift#container`. + log\_name proxy-server Label used when logging + log\_facility LOG\_LOCAL0 Syslog log facility + log\_level INFO Log level + log\_headers True If True, log headers in each request + recheck\_account\_existence 60 Cache timeout in seconds to send memcached for account existence + recheck\_container\_existence 60 Cache timeout in seconds to send memcached for container existence + object\_chunk\_size 65536 Chunk size to read from object servers + client\_chunk\_size 65536 Chunk size to read from clients + memcache\_servers 127.0.0.1:11211 Comma separated list of memcached servers ip:port + node\_timeout 10 Request timeout to external services + client\_timeout 60 Timeout to read one chunk from a client + conn\_timeout 0.5 Connection timeout to external services + error\_suppression\_interval 60 Time in seconds that must elapse since the last error for a node to be considered no longer error limited + error\_suppression\_limit 10 Error count to consider a node error limited + allow\_account\_management false Whether account `PUT`s and `DELETE`s are even callable + + : proxy-server.conf Server Options in the [proxy-server] section + +Configuring Object Server +------------------------- + +The Object Server is a very simple blob storage server that can store, +retrieve, and delete objects stored on local devices. Objects are stored +as binary files on the file system with metadata stored in the file’s +extended attributes (xattrs). This requires that the underlying file +system choice for object servers support xattrs on files. + +The configurable options pertaining Object Server are stored in the file +`/etc/swift/object-server/1.conf`. The following is the sample +`object-server/1.conf` file: + + [DEFAULT] + devices = /srv/1/node + mount_check = false + bind_port = 6010 + user = root + log_facility = LOG_LOCAL2 + + [pipeline:main] + pipeline = gluster object-server + + [app:object-server] + use = egg:swift#object + + [filter:gluster] + use = egg:swift#gluster + + [object-replicator] + vm_test_mode = yes + + [object-updater] + [object-auditor] + +The following are the configurable options: + + Option Default Description + -------------- ------------ ---------------------------------------------------------------------------------------------------- + swift\_dir /etc/swift Swift configuration directory + devices /srv/node Mount parent directory where devices are mounted + mount\_check true Whether or not check if the devices are mounted to prevent accidentally writing to the root device + bind\_ip 0.0.0.0 IP Address for server to bind + bind\_port 6000 Port for server to bind + workers 1 Number of workers to fork + + : object-server.conf Default Options in the [DEFAULT] section + + Option Default Description + ---------------------- --------------- ---------------------------------------------------------------------------------------------------- + use paste.deploy entry point for the object server. For most cases, this should be `egg:swift#object`. + log\_name object-server log name used when logging + log\_facility LOG\_LOCAL0 Syslog log facility + log\_level INFO Logging level + log\_requests True Whether or not to log each request + user swift swift user + node\_timeout 3 Request timeout to external services + conn\_timeout 0.5 Connection timeout to external services + network\_chunk\_size 65536 Size of chunks to read or write over the network + disk\_chunk\_size 65536 Size of chunks to read or write to disk + max\_upload\_time 65536 Maximum time allowed to upload an object + slow 0 If \> 0, Minimum time in seconds for a `PUT` or `DELETE` request to complete + + : object-server.conf Server Options in the [object-server] section + +Configuring Container Server +---------------------------- + +The Container Server’s primary job is to handle listings of objects. The +listing is done by querying the GlusterFS mount point with path. This +query returns a list of all files and directories present under that +container. + +The configurable options pertaining to container server are stored in +`/etc/swift/container-server/1.conf` file. The following is the sample +`container-server/1.conf` file: + + [DEFAULT] + devices = /srv/1/node + mount_check = false + bind_port = 6011 + user = root + log_facility = LOG_LOCAL2 + + [pipeline:main] + pipeline = gluster container-server + + [app:container-server] + use = egg:swift#container + + [filter:gluster] + use = egg:swift#gluster + + [container-replicator] + [container-updater] + [container-auditor] + +The following are the configurable options: + + Option Default Description + -------------- ------------ ---------------------------------------------------------------------------------------------------- + swift\_dir /etc/swift Swift configuration directory + devices /srv/node Mount parent directory where devices are mounted + mount\_check true Whether or not check if the devices are mounted to prevent accidentally writing to the root device + bind\_ip 0.0.0.0 IP Address for server to bind + bind\_port 6001 Port for server to bind + workers 1 Number of workers to fork + user swift Swift user + + : container-server.conf Default Options in the [DEFAULT] section + + Option Default Description + --------------- ------------------ ---------------------------------------------------------------------------------------------------------- + use paste.deploy entry point for the container server. For most cases, this should be `egg:swift#container`. + log\_name container-server Label used when logging + log\_facility LOG\_LOCAL0 Syslog log facility + log\_level INFO Logging level + node\_timeout 3 Request timeout to external services + conn\_timeout 0.5 Connection timeout to external services + + : container-server.conf Server Options in the [container-server] + section + +Configuring Account Server +-------------------------- + +The Account Server is very similar to the Container Server, except that +it is responsible for listing of containers rather than objects. In UFO, +each gluster volume is an account. + +The configurable options pertaining to account server are stored in +`/etc/swift/account-server/1.conf` file. The following is the sample +`account-server/1.conf` file: + + [DEFAULT] + devices = /srv/1/node + mount_check = false + bind_port = 6012 + user = root + log_facility = LOG_LOCAL2 + + [pipeline:main] + pipeline = gluster account-server + + [app:account-server] + use = egg:swift#account + + [filter:gluster] + use = egg:swift#gluster + + [account-replicator] + vm_test_mode = yes + + [account-auditor] + [account-reaper] + +The following are the configurable options: + + Option Default Description + -------------- ------------ ---------------------------------------------------------------------------------------------------- + swift\_dir /etc/swift Swift configuration directory + devices /srv/node mount parent directory where devices are mounted + mount\_check true Whether or not check if the devices are mounted to prevent accidentally writing to the root device + bind\_ip 0.0.0.0 IP Address for server to bind + bind\_port 6002 Port for server to bind + workers 1 Number of workers to fork + user swift Swift user + + : account-server.conf Default Options in the [DEFAULT] section + + Option Default Description + --------------- ---------------- ---------------------------------------------------------------------------------------------------------- + use paste.deploy entry point for the container server. For most cases, this should be `egg:swift#container`. + log\_name account-server Label used when logging + log\_facility LOG\_LOCAL0 Syslog log facility + log\_level INFO Logging level + + : account-server.conf Server Options in the [account-server] section + +Starting and Stopping Server +---------------------------- + +You must start the server manually when system reboots and whenever you +update/modify the configuration files. + +- To start the server, enter the following command: + + `# swift_init main start` + +- To stop the server, enter the following command: + + `# swift_init main stop` + +Working with Unified File and Object Storage +============================================ + +This section describes the REST API for administering and managing +Object Storage. All requests will be directed to the host and URL +described in the `X-Storage-URL HTTP` header obtained during successful +authentication. + +Configuring Authenticated Access +-------------------------------- + +Authentication is the process of proving identity to the system. To use +the REST interface, you must obtain an authorization token using GET +method and supply it with v1.0 as the path. + +Each REST request against the Object Storage system requires the +addition of a specific authorization token HTTP x-header, defined as +X-Auth-Token. The storage URL and authentication token are returned in +the headers of the response. + +- To authenticate, run the following command: + + GET auth/v1.0 HTTP/1.1 + Host: <auth URL> + X-Auth-User: <account name>:<user name> + X-Auth-Key: <user-Password> + + For example, + + GET auth/v1.0 HTTP/1.1 + Host: auth.example.com + X-Auth-User: test:tester + X-Auth-Key: testing + + HTTP/1.1 200 OK + X-Storage-Url: https:/example.storage.com:443/v1/AUTH_test + X-Storage-Token: AUTH_tkde3ad38b087b49bbbac0494f7600a554 + X-Auth-Token: AUTH_tkde3ad38b087b49bbbac0494f7600a554 + Content-Length: 0 + Date: Wed, 10 jul 2011 06:11:51 GMT + + To authenticate access using cURL (for the above example), run the + following command: + + curl -v -H 'X-Storage-User: test:tester' -H 'X-Storage-Pass:testing' -k + https://auth.example.com:443/auth/v1.0 + + The X-Auth-Url has to be parsed and used in the connection and + request line of all subsequent requests to the server. In the + example output, users connecting to server will send most + container/object requests with a host header of example.storage.com + and the request line's version and account as v1/AUTH\_test. + +> **Note** +> +> The authentication tokens are valid for a 24 hour period. + +Working with Accounts +--------------------- + +This section describes the list of operations you can perform at the +account level of the URL. + +### Displaying Container Information + +You can list the objects of a specific container, or all containers, as +needed using GET command. You can use the following optional parameters +with GET request to refine the results: + + Parameter Description + ----------- -------------------------------------------------------------------------- + limit Limits the number of results to at most *n* value. + marker Returns object names greater in value than the specified marker. + format Specify either json or xml to return the respective serialized response. + +**To display container information** + +- List all the containers of an account using the following command: + + GET /<apiversion>/<account> HTTP/1.1 + Host: <storage URL> + X-Auth-Token: <authentication-token-key> + + For example, + + GET /v1/AUTH_test HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + + HTTP/1.1 200 Ok + Date: Wed, 13 Jul 2011 16:32:21 GMT + Server: Apache + Content-Type: text/plain; charset=UTF-8 + Content-Length: 39 + + songs + movies + documents + reports + +To display container information using cURL (for the above example), run +the following command: + + curl -v -X GET -H 'X-Auth-Token: AUTH_tkde3ad38b087b49bbbac0494f7600a554' + https://example.storage.com:443/v1/AUTH_test -k + +### Displaying Account Metadata Information + +You can issue HEAD command to the storage service to view the number of +containers and the total bytes stored in the account. + +- To display containers and storage used, run the following command: + + HEAD /<apiversion>/<account> HTTP/1.1 + Host: <storage URL> + X-Auth-Token: <authentication-token-key> + + For example, + + HEAD /v1/AUTH_test HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + + HTTP/1.1 204 No Content + Date: Wed, 13 Jul 2011 16:52:21 GMT + Server: Apache + X-Account-Container-Count: 4 + X-Account-Total-Bytes-Used: 394792 + + To display account metadata information using cURL (for the above + example), run the following command: + + curl -v -X HEAD -H 'X-Auth-Token: + AUTH_tkde3ad38b087b49bbbac0494f7600a554' + https://example.storage.com:443/v1/AUTH_test -k + +Working with Containers +----------------------- + +This section describes the list of operations you can perform at the +container level of the URL. + +### Creating Containers + +You can use PUT command to create containers. Containers are the storage +folders for your data. The URL encoded name must be less than 256 bytes +and cannot contain a forward slash '/' character. + +- To create a container, run the following command: + + PUT /<apiversion>/<account>/<container>/ HTTP/1.1 + Host: <storage URL> + X-Auth-Token: <authentication-token-key> + + For example, + + PUT /v1/AUTH_test/pictures/ HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + HTTP/1.1 201 Created + + Date: Wed, 13 Jul 2011 17:32:21 GMT + Server: Apache + Content-Type: text/plain; charset=UTF-8 + + To create container using cURL (for the above example), run the + following command: + + curl -v -X PUT -H 'X-Auth-Token: + AUTH_tkde3ad38b087b49bbbac0494f7600a554' + https://example.storage.com:443/v1/AUTH_test/pictures -k + + The status code of 201 (Created) indicates that you have + successfully created the container. If a container with same is + already existed, the status code of 202 is displayed. + +### Displaying Objects of a Container + +You can list the objects of a container using GET command. You can use +the following optional parameters with GET request to refine the +results: + + Parameter Description + ----------- -------------------------------------------------------------------------------------------------------------- + limit Limits the number of results to at most *n* value. + marker Returns object names greater in value than the specified marker. + prefix Displays the results limited to object names beginning with the substring x. beginning with the substring x. + path Returns the object names nested in the pseudo path. + format Specify either json or xml to return the respective serialized response. + delimiter Returns all the object names nested in the container. + +To display objects of a container + +- List objects of a specific container using the following command: + +<!-- --> + + GET /<apiversion>/<account>/<container>[parm=value] HTTP/1.1 + Host: <storage URL> + X-Auth-Token: <authentication-token-key> + +For example, + + GET /v1/AUTH_test/images HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + + HTTP/1.1 200 Ok + Date: Wed, 13 Jul 2011 15:42:21 GMT + Server: Apache + Content-Type: text/plain; charset=UTF-8 + Content-Length: 139 + + sample file.jpg + test-file.pdf + You and Me.pdf + Puddle of Mudd.mp3 + Test Reports.doc + +To display objects of a container using cURL (for the above example), +run the following command: + + curl -v -X GET-H 'X-Auth-Token: AUTH_tkde3ad38b087b49bbbac0494f7600a554' + https://example.storage.com:443/v1/AUTH_test/images -k + +### Displaying Container Metadata Information + +You can issue HEAD command to the storage service to view the number of +objects in a container and the total bytes of all the objects stored in +the container. + +- To display list of objects and storage used, run the following + command: + + HEAD /<apiversion>/<account>/<container> HTTP/1.1 + Host: <storage URL> + X-Auth-Token: <authentication-token-key> + + For example, + + HEAD /v1/AUTH_test/images HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + + HTTP/1.1 204 No Content + Date: Wed, 13 Jul 2011 19:52:21 GMT + Server: Apache + X-Account-Object-Count: 8 + X-Container-Bytes-Used: 472 + + To display list of objects and storage used in a container using + cURL (for the above example), run the following command: + + curl -v -X HEAD -H 'X-Auth-Token: + AUTH_tkde3ad38b087b49bbbac0494f7600a554' + https://example.storage.com:443/v1/AUTH_test/images -k + +### Deleting Container + +You can use DELETE command to permanently delete containers. The +container must be empty before it can be deleted. + +You can issue HEAD command to determine if it contains any objects. + +- To delete a container, run the following command: + + DELETE /<apiversion>/<account>/<container>/ HTTP/1.1 + Host: <storage URL> + X-Auth-Token: <authentication-token-key> + + For example, + + DELETE /v1/AUTH_test/pictures HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + + HTTP/1.1 204 No Content + Date: Wed, 13 Jul 2011 17:52:21 GMT + Server: Apache + Content-Length: 0 + Content-Type: text/plain; charset=UTF-8 + + To delete a container using cURL (for the above example), run the + following command: + + curl -v -X DELETE -H 'X-Auth-Token: + AUTH_tkde3ad38b087b49bbbac0494f7600a554' + https://example.storage.com:443/v1/AUTH_test/pictures -k + + The status code of 204 (No Content) indicates that you have + successfully deleted the container. If that container does not + exist, the status code 404 (Not Found) is displayed, and if the + container is not empty, the status code 409 (Conflict) is displayed. + +### Updating Container Metadata + +You can update the metadata of container using POST operation, metadata +keys should be prefixed with 'x-container-meta'. + +- To update the metadata of the object, run the following command: + + POST /<apiversion>/<account>/<container> HTTP/1.1 + Host: <storage URL> + X-Auth-Token: <Authentication-token-key> + X-Container-Meta-<key>: <new value> + X-Container-Meta-<key>: <new value> + + For example, + + POST /v1/AUTH_test/images HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + X-Container-Meta-Zoo: Lion + X-Container-Meta-Home: Dog + + HTTP/1.1 204 No Content + Date: Wed, 13 Jul 2011 20:52:21 GMT + Server: Apache + Content-Type: text/plain; charset=UTF-8 + + To update the metadata of the object using cURL (for the above + example), run the following command: + + curl -v -X POST -H 'X-Auth-Token: + AUTH_tkde3ad38b087b49bbbac0494f7600a554' + https://example.storage.com:443/v1/AUTH_test/images -H ' X-Container-Meta-Zoo: Lion' -H 'X-Container-Meta-Home: Dog' -k + + The status code of 204 (No Content) indicates the container's + metadata is updated successfully. If that object does not exist, the + status code 404 (Not Found) is displayed. + +### Setting ACLs on Container + +You can set the container access control list by using POST command on +container with `x- container-read` and` x-container-write` keys. + +The ACL format is `[item[,item...]]`. Each item can be a group name to +give access to or a referrer designation to grant or deny based on the +HTTP Referer header. + +The referrer designation format is:` .r:[-]value`. + +The .r can also be `.ref, .referer, `or .`referrer`; though it will be +shortened to.r for decreased character count usage. The value can be `*` +to specify any referrer host is allowed access. The leading minus sign +(-) indicates referrer hosts that should be denied access. + +Examples of valid ACLs: + + .r:* + .r:*,bobs_account,sues_account:sue + bobs_account,sues_account:sue + +Examples of invalid ACLs: + + .r: + .r:- + +By default, allowing read access via `r `will not allow listing objects +in the container but allows retrieving objects from the container. To +turn on listings, use the .`rlistings` directive. Also, `.r` +designations are not allowed in headers whose names include the word +write. + +For example, to set all the objects access rights to "public‟ inside the +container using cURL (for the above example), run the following command: + + curl -v -X POST -H 'X-Auth-Token: + AUTH_tkde3ad38b087b49bbbac0494f7600a554' + https://example.storage.com:443/v1/AUTH_test/images + -H 'X-Container-Read: .r:*' -k + +Working with Objects +-------------------- + +An object represents the data and any metadata for the files stored in +the system. Through the REST interface, metadata for an object can be +included by adding custom HTTP headers to the request and the data +payload as the request body. Objects name should not exceed 1024 bytes +after URL encoding. + +This section describes the list of operations you can perform at the +object level of the URL. + +### Creating or Updating Object + +You can use PUT command to write or update an object's content and +metadata. + +You can verify the data integrity by including an MD5checksum for the +object's data in the ETag header. ETag header is optional and can be +used to ensure that the object's contents are stored successfully in the +storage system. + +You can assign custom metadata to objects by including additional HTTP +headers on the PUT request. The objects created with custom metadata via +HTTP headers are identified with the`X-Object- Meta`- prefix. + +- To create or update an object, run the following command: + + PUT /<apiversion>/<account>/<container>/<object> HTTP/1.1 + Host: <storage URL> + X-Auth-Token: <authentication-token-key> + ETag: da1e100dc9e7becc810986e37875ae38 + Content-Length: 342909 + X-Object-Meta-PIN: 2343 + + For example, + + PUT /v1/AUTH_test/pictures/dog HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + ETag: da1e100dc9e7becc810986e37875ae38 + + HTTP/1.1 201 Created + Date: Wed, 13 Jul 2011 18:32:21 GMT + Server: Apache + ETag: da1e100dc9e7becc810986e37875ae38 + Content-Length: 0 + Content-Type: text/plain; charset=UTF-8 + + To create or update an object using cURL (for the above example), + run the following command: + + curl -v -X PUT -H 'X-Auth-Token: + AUTH_tkde3ad38b087b49bbbac0494f7600a554' + https://example.storage.com:443/v1/AUTH_test/pictures/dog -H 'Content- + Length: 0' -k + + The status code of 201 (Created) indicates that you have + successfully created or updated the object. If there is a missing + content-Length or Content-Type header in the request, the status + code of 412 (Length Required) is displayed. (Optionally) If the MD5 + checksum of the data written to the storage system does not match + the ETag value, the status code of 422 (Unprocessable Entity) is + displayed. + +#### Chunked Transfer Encoding + +You can upload data without knowing the size of the data to be uploaded. +You can do this by specifying an HTTP header of Transfer-Encoding: +chunked and without using a Content-Length header. + +You can use this feature while doing a DB dump, piping the output +through gzip, and then piping the data directly into Object Storage +without having to buffer the data to disk to compute the file size. + +- To create or update an object, run the following command: + + PUT /<apiversion>/<account>/<container>/<object> HTTP/1.1 + Host: <storage URL> + X-Auth-Token: <authentication-token-key> + Transfer-Encoding: chunked + X-Object-Meta-PIN: 2343 + + For example, + + PUT /v1/AUTH_test/pictures/cat HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + Transfer-Encoding: chunked + X-Object-Meta-PIN: 2343 + 19 + A bunch of data broken up + D + into chunks. + 0 + +### Copying Object + +You can copy object from one container to another or add a new object +and then add reference to designate the source of the data from another +container. + +**To copy object from one container to another** + +- To add a new object and designate the source of the data from + another container, run the following command: + + COPY /<apiversion>/<account>/<container>/<sourceobject> HTTP/1.1 + Host: <storage URL> + X-Auth-Token: < authentication-token-key> + Destination: /<container>/<destinationobject> + + For example, + + COPY /v1/AUTH_test/images/dogs HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + Destination: /photos/cats + + HTTP/1.1 201 Created + Date: Wed, 13 Jul 2011 18:32:21 GMT + Server: Apache + Content-Length: 0 + Content-Type: text/plain; charset=UTF-8 + + To copy an object using cURL (for the above example), run the + following command: + + curl -v -X COPY -H 'X-Auth-Token: + AUTH_tkde3ad38b087b49bbbac0494f7600a554' -H 'Destination: /photos/cats' -k https://example.storage.com:443/v1/AUTH_test/images/dogs + + The status code of 201 (Created) indicates that you have + successfully copied the object. If there is a missing content-Length + or Content-Type header in the request, the status code of 412 + (Length Required) is displayed. + + You can also use PUT command to copy object by using additional + header `X-Copy-From: container/obj`. + +- To use PUT command to copy an object, run the following command: + + PUT /v1/AUTH_test/photos/cats HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + X-Copy-From: /images/dogs + + HTTP/1.1 201 Created + Date: Wed, 13 Jul 2011 18:32:21 GMT + Server: Apache + Content-Type: text/plain; charset=UTF-8 + + To copy an object using cURL (for the above example), run the + following command: + + curl -v -X PUT -H 'X-Auth-Token: AUTH_tkde3ad38b087b49bbbac0494f7600a554' + -H 'X-Copy-From: /images/dogs' –k + https://example.storage.com:443/v1/AUTH_test/images/cats + + The status code of 201 (Created) indicates that you have + successfully copied the object. + +### Displaying Object Information + +You can issue GET command on an object to view the object data of the +object. + +- To display the content of an object run the following command: + + GET /<apiversion>/<account>/<container>/<object> HTTP/1.1 + Host: <storage URL> + X-Auth-Token: <Authentication-token-key> + + For example, + + GET /v1/AUTH_test/images/cat HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + + HTTP/1.1 200 Ok + Date: Wed, 13 Jul 2011 23:52:21 GMT + Server: Apache + Last-Modified: Thu, 14 Jul 2011 13:40:18 GMT + ETag: 8a964ee2a5e88be344f36c22562a6486 + Content-Length: 534210 + [.........] + + To display the content of an object using cURL (for the above + example), run the following command: + + curl -v -X GET -H 'X-Auth-Token: + AUTH_tkde3ad38b087b49bbbac0494f7600a554' + https://example.storage.com:443/v1/AUTH_test/images/cat -k + + The status code of 200 (Ok) indicates the object‟s data is displayed + successfully. If that object does not exist, the status code 404 + (Not Found) is displayed. + +### Displaying Object Metadata + +You can issue HEAD command on an object to view the object metadata and +other standard HTTP headers. You must send only authorization token as +header. + +- To display the metadata of the object, run the following command: + +<!-- --> + + HEAD /<apiversion>/<account>/<container>/<object> HTTP/1.1 + Host: <storage URL> + X-Auth-Token: <Authentication-token-key> + +For example, + + HEAD /v1/AUTH_test/images/cat HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + + HTTP/1.1 204 No Content + Date: Wed, 13 Jul 2011 21:52:21 GMT + Server: Apache + Last-Modified: Thu, 14 Jul 2011 13:40:18 GMT + ETag: 8a964ee2a5e88be344f36c22562a6486 + Content-Length: 512000 + Content-Type: text/plain; charset=UTF-8 + X-Object-Meta-House: Cat + X-Object-Meta-Zoo: Cat + X-Object-Meta-Home: Cat + X-Object-Meta-Park: Cat + +To display the metadata of the object using cURL (for the above +example), run the following command: + + curl -v -X HEAD -H 'X-Auth-Token: + AUTH_tkde3ad38b087b49bbbac0494f7600a554' + https://example.storage.com:443/v1/AUTH_test/images/cat -k + +The status code of 204 (No Content) indicates the object‟s metadata is +displayed successfully. If that object does not exist, the status code +404 (Not Found) is displayed. + +### Updating Object Metadata + +You can issue POST command on an object name only to set or overwrite +arbitrary key metadata. You cannot change the object‟s other headers +such as Content-Type, ETag and others using POST operation. The POST +command will delete all the existing metadata and replace it with the +new arbitrary key metadata. + +You must prefix **X-Object-Meta-** to the key names. + +- To update the metadata of an object, run the following command: + + POST /<apiversion>/<account>/<container>/<object> HTTP/1.1 + Host: <storage URL> + X-Auth-Token: <Authentication-token-key> + X-Object-Meta-<key>: <new value> + X-Object-Meta-<key>: <new value> + + For example, + + POST /v1/AUTH_test/images/cat HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + X-Object-Meta-Zoo: Lion + X-Object-Meta-Home: Dog + + HTTP/1.1 202 Accepted + Date: Wed, 13 Jul 2011 22:52:21 GMT + Server: Apache + Content-Length: 0 + Content-Type: text/plain; charset=UTF-8 + + To update the metadata of an object using cURL (for the above + example), run the following command: + + curl -v -X POST -H 'X-Auth-Token: + AUTH_tkde3ad38b087b49bbbac0494f7600a554' + https://example.storage.com:443/v1/AUTH_test/images/cat -H ' X-Object- + Meta-Zoo: Lion' -H 'X-Object-Meta-Home: Dog' -k + + The status code of 202 (Accepted) indicates that you have + successfully updated the object‟s metadata. If that object does not + exist, the status code 404 (Not Found) is displayed. + +### Deleting Object + +You can use DELETE command to permanently delete the object. + +The DELETE command on an object will be processed immediately and any +subsequent operations like GET, HEAD, POST, or DELETE on the object will +display 404 (Not Found) error. + +- To delete an object, run the following command: + + DELETE /<apiversion>/<account>/<container>/<object> HTTP/1.1 + Host: <storage URL> + X-Auth-Token: <Authentication-token-key> + + For example, + + DELETE /v1/AUTH_test/pictures/cat HTTP/1.1 + Host: example.storage.com + X-Auth-Token: AUTH_tkd3ad38b087b49bbbac0494f7600a554 + + HTTP/1.1 204 No Content + Date: Wed, 13 Jul 2011 20:52:21 GMT + Server: Apache + Content-Type: text/plain; charset=UTF-8 + + To delete an object using cURL (for the above example), run the + following command: + + curl -v -X DELETE -H 'X-Auth-Token: + AUTH_tkde3ad38b087b49bbbac0494f7600a554' + https://example.storage.com:443/v1/AUTH_test/pictures/cat -k + + The status code of 204 (No Content) indicates that you have + successfully deleted the object. If that object does not exist, the + status code 404 (Not Found) is displayed. + + []: http://download.gluster.com/pub/gluster/glusterfs/3.2/UFO/ diff --git a/doc/admin-guide/en-US/markdown/admin_commandref.md b/doc/admin-guide/en-US/markdown/admin_commandref.md new file mode 100644 index 00000000000..4ff05f4eff2 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_commandref.md @@ -0,0 +1,180 @@ +Command Reference +================= + +This section describes the available commands and includes the following +section: + +- gluster Command + + Gluster Console Manager (command line interpreter) + +- glusterd Daemon + + Gluster elastic volume management daemon + +gluster Command +=============== + +**NAME** + +gluster - Gluster Console Manager (command line interpreter) + +**SYNOPSIS** + +To run the program and display the gluster prompt: + +**gluster** + +To specify a command directly: gluster [COMMANDS] [OPTIONS] + +**DESCRIPTION** + +The Gluster Console Manager is a command line utility for elastic volume +management. You can run the gluster command on any export server. The +command enables administrators to perform cloud operations such as +creating, expanding, shrinking, rebalancing, and migrating volumes +without needing to schedule server downtime. + +**COMMANDS** + + --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + Command Description + ---------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + **Volume** + + volume info [all | VOLNAME] Displays information about all volumes, or the specified volume. + + volume create NEW-VOLNAME [stripe COUNT] [replica COUNT] [transport tcp | rdma | tcp,rdma] NEW-BRICK ... Creates a new volume of the specified type using the specified bricks and transport type (the default transport type is tcp). + + volume delete VOLNAME Deletes the specified volume. + + volume start VOLNAME Starts the specified volume. + + volume stop VOLNAME [force] Stops the specified volume. + + volume rename VOLNAME NEW-VOLNAME Renames the specified volume. + + volume help Displays help for the volume command. + + **Brick** + + volume add-brick VOLNAME NEW-BRICK ... Adds the specified brick to the specified volume. + + volume replace-brick VOLNAME (BRICK NEW-BRICK) start | pause | abort | status Replaces the specified brick. + + volume remove-brick VOLNAME [(replica COUNT)|(stripe COUNT)] BRICK ... Removes the specified brick from the specified volume. + + **Rebalance** + + volume rebalance VOLNAME start Starts rebalancing the specified volume. + + volume rebalance VOLNAME stop Stops rebalancing the specified volume. + + volume rebalance VOLNAME status Displays the rebalance status of the specified volume. + + **Log** + + volume log filename VOLNAME [BRICK] DIRECTORY Sets the log directory for the corresponding volume/brick. + + volume log rotate VOLNAME [BRICK] Rotates the log file for corresponding volume/brick. + + volume log locate VOLNAME [BRICK] Locates the log file for corresponding volume/brick. + + **Peer** + + peer probe HOSTNAME Probes the specified peer. + + peer detach HOSTNAME Detaches the specified peer. + + peer status Displays the status of peers. + + peer help Displays help for the peer command. + + **Geo-replication** + + volume geo-replication MASTER SLAVE start Start geo-replication between the hosts specified by MASTER and SLAVE. You can specify a local master volume as :VOLNAME. + + You can specify a local slave volume as :VOLUME and a local slave directory as /DIRECTORY/SUB-DIRECTORY. You can specify a remote slave volume as DOMAIN::VOLNAME and a remote slave directory as DOMAIN:/DIRECTORY/SUB-DIRECTORY. + + volume geo-replication MASTER SLAVE stop Stop geo-replication between the hosts specified by MASTER and SLAVE. You can specify a local master volume as :VOLNAME and a local master directory as /DIRECTORY/SUB-DIRECTORY. + + You can specify a local slave volume as :VOLNAME and a local slave directory as /DIRECTORY/SUB-DIRECTORY. You can specify a remote slave volume as DOMAIN::VOLNAME and a remote slave directory as DOMAIN:/DIRECTORY/SUB-DIRECTORY. + + volume geo-replication MASTER SLAVE config [options] Configure geo-replication options between the hosts specified by MASTER and SLAVE. + + gluster-command COMMAND The path where the gluster command is installed. + + gluster-log-level LOGFILELEVEL The log level for gluster processes. + + log-file LOGFILE The path to the geo-replication log file. + + log-level LOGFILELEVEL The log level for geo-replication. + + remote-gsyncd COMMAND The path where the gsyncd binary is installed on the remote machine. + + ssh-command COMMAND The ssh command to use to connect to the remote machine (the default is ssh). + + rsync-command COMMAND The rsync command to use for synchronizing the files (the default is rsync). + + volume\_id= UID The command to delete the existing master UID for the intermediate/slave node. + + timeout SECONDS The timeout period. + + sync-jobs N The number of simultaneous files/directories that can be synchronized. + + ignore-deletes If this option is set to 1, a file deleted on master will not trigger a delete operation on the slave. Hence, the slave will remain as a superset of the master and can be used to recover the master in case of crash and/or accidental delete. + + **Other** + + help Display the command options. + + quit Exit the gluster command line interface. + --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + +**FILES** + +/var/lib/glusterd/\* + +**SEE ALSO** + +fusermount(1), mount.glusterfs(8), glusterfs-volgen(8), glusterfs(8), +glusterd(8) + +glusterd Daemon +=============== + +**NAME** + +glusterd - Gluster elastic volume management daemon + +**SYNOPSIS** + +glusterd [OPTION...] + +**DESCRIPTION** + +The glusterd daemon is used for elastic volume management. The daemon +must be run on all export servers. + +**OPTIONS** + + Option Description + ----------------------------------- ---------------------------------------------------------------------------------------------------------------- + **Basic** + -l=LOGFILE, --log-file=LOGFILE Files to use for logging (the default is /usr/local/var/log/glusterfs/glusterfs.log). + -L=LOGLEVEL, --log-level=LOGLEVEL Logging severity. Valid options are TRACE, DEBUG, INFO, WARNING, ERROR and CRITICAL (the default is INFO). + --debug Runs the program in debug mode. This option sets --no-daemon, --log-level to DEBUG, and --log-file to console. + -N, --no-daemon Runs the program in the foreground. + **Miscellaneous** + -?, --help Displays this help. + --usage Displays a short usage message. + -V, --version Prints the program version. + +**FILES** + +/var/lib/glusterd/\* + +**SEE ALSO** + +fusermount(1), mount.glusterfs(8), glusterfs-volgen(8), glusterfs(8), +gluster(8) diff --git a/doc/admin-guide/en-US/markdown/admin_console.md b/doc/admin-guide/en-US/markdown/admin_console.md new file mode 100644 index 00000000000..9b69de02d3b --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_console.md @@ -0,0 +1,51 @@ +Using the Gluster Console Manager – Command Line Utility +======================================================== + +The Gluster Console Manager is a single command line utility that +simplifies configuration and management of your storage environment. The +Gluster Console Manager is similar to the LVM (Logical Volume Manager) +CLI or ZFS Command Line Interface, but across multiple storage servers. +You can use the Gluster Console Manager online, while volumes are +mounted and active. Gluster automatically synchronizes volume +configuration information across all Gluster servers. + +Using the Gluster Console Manager, you can create new volumes, start +volumes, and stop volumes, as required. You can also add bricks to +volumes, remove bricks from existing volumes, as well as change +translator settings, among other operations. + +You can also use the commands to create scripts for automation, as well +as use the commands as an API to allow integration with third-party +applications. + +**Running the Gluster Console Manager** + +You can run the Gluster Console Manager on any GlusterFS server either +by invoking the commands or by running the Gluster CLI in interactive +mode. You can also use the gluster command remotely using SSH. + +- To run commands directly: + + ` # gluster peer ` + + For example: + + ` # gluster peer status ` + +- To run the Gluster Console Manager in interactive mode + + `# gluster` + + You can execute gluster commands from the Console Manager prompt: + + ` gluster> ` + + For example, to view the status of the peer server: + + \# `gluster ` + + `gluster > peer status ` + + Display the status of the peer. + + diff --git a/doc/admin-guide/en-US/markdown/admin_directory_Quota.md b/doc/admin-guide/en-US/markdown/admin_directory_Quota.md new file mode 100644 index 00000000000..09c757781bd --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_directory_Quota.md @@ -0,0 +1,172 @@ +Managing Directory Quota +======================== + +Directory quotas in GlusterFS allow you to set limits on usage of disk +space by directories or volumes. The storage administrators can control +the disk space utilization at the directory and/or volume levels in +GlusterFS by setting limits to allocatable disk space at any level in +the volume and directory hierarchy. This is particularly useful in cloud +deployments to facilitate utility billing model. + +> **Note** +> +> For now, only Hard limit is supported. Here, the limit cannot be +> exceeded and attempts to use more disk space or inodes beyond the set +> limit will be denied. + +System administrators can also monitor the resource utilization to limit +the storage for the users depending on their role in the organization. + +You can set the quota at the following levels: + +- Directory level – limits the usage at the directory level + +- Volume level – limits the usage at the volume level + +> **Note** +> +> You can set the disk limit on the directory even if it is not created. +> The disk limit is enforced immediately after creating that directory. +> For more information on setting disk limit, see ?. + +Enabling Quota +============== + +You must enable Quota to set disk limits. + +**To enable quota** + +- Enable the quota using the following command: + + `# gluster volume quota enable ` + + For example, to enable quota on test-volume: + + # gluster volume quota test-volume enable + Quota is enabled on /test-volume + +Disabling Quota +=============== + +You can disable Quota, if needed. + +**To disable quota:** + +- Disable the quota using the following command: + + `# gluster volume quota disable ` + + For example, to disable quota translator on test-volume: + + # gluster volume quota test-volume disable + Quota translator is disabled on /test-volume + +Setting or Replacing Disk Limit +=============================== + +You can create new directories in your storage environment and set the +disk limit or set disk limit for the existing directories. The directory +name should be relative to the volume with the export directory/mount +being treated as "/". + +**To set or replace disk limit** + +- Set the disk limit using the following command: + + `# gluster volume quota limit-usage /` + + For example, to set limit on data directory on test-volume where + data is a directory under the export directory: + + # gluster volume quota test-volume limit-usage /data 10GB + Usage limit has been set on /data + + > **Note** + > + > In a multi-level directory hierarchy, the strictest disk limit + > will be considered for enforcement. + +Displaying Disk Limit Information +================================= + +You can display disk limit information on all the directories on which +the limit is set. + +**To display disk limit information** + +- Display disk limit information of all the directories on which limit + is set, using the following command: + + `# gluster volume quota list` + + For example, to see the set disks limit on test-volume: + + # gluster volume quota test-volume list + + + /Test/data 10 GB 6 GB + /Test/data1 10 GB 4 GB + +- Display disk limit information on a particular directory on which + limit is set, using the following command: + + `# gluster volume quota list ` + + For example, to see the set limit on /data directory of test-volume: + + # gluster volume quota test-volume list /data + + + /Test/data 10 GB 6 GB + +Updating Memory Cache Size +========================== + +For performance reasons, quota caches the directory sizes on client. You +can set timeout indicating the maximum valid duration of directory sizes +in cache, from the time they are populated. + +For example: If there are multiple clients writing to a single +directory, there are chances that some other client might write till the +quota limit is exceeded. However, this new file-size may not get +reflected in the client till size entry in cache has become stale +because of timeout. If writes happen on this client during this +duration, they are allowed even though they would lead to exceeding of +quota-limits, since size in cache is not in sync with the actual size. +When timeout happens, the size in cache is updated from servers and will +be in sync and no further writes will be allowed. A timeout of zero will +force fetching of directory sizes from server for every operation that +modifies file data and will effectively disables directory size caching +on client side. + +**To update the memory cache size** + +- Update the memory cache size using the following command: + + `# gluster volume set features.quota-timeout` + + For example, to update the memory cache size for every 5 seconds on + test-volume: + + # gluster volume set test-volume features.quota-timeout 5 + Set volume successful + +Removing Disk Limit +=================== + +You can remove set disk limit, if you do not want quota anymore. + +**To remove disk limit** + +- Remove disk limit set on a particular directory using the following + command: + + `# gluster volume quota remove ` + + For example, to remove the disk limit on /data directory of + test-volume: + + # gluster volume quota test-volume remove /data + Usage limit set on /data is removed + + diff --git a/doc/admin-guide/en-US/markdown/admin_geo-replication.md b/doc/admin-guide/en-US/markdown/admin_geo-replication.md new file mode 100644 index 00000000000..849957244a9 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_geo-replication.md @@ -0,0 +1,738 @@ +Managing Geo-replication +======================== + +Geo-replication provides a continuous, asynchronous, and incremental +replication service from one site to another over Local Area Networks +(LANs), Wide Area Network (WANs), and across the Internet. + +Geo-replication uses a master–slave model, whereby replication and +mirroring occurs between the following partners: + +- Master – a GlusterFS volume + +- Slave – a slave which can be of the following types: + + - A local directory which can be represented as file URL like + `file:///path/to/dir`. You can use shortened form, for example, + ` /path/to/dir`. + + - A GlusterFS Volume - Slave volume can be either a local volume + like `gluster://localhost:volname` (shortened form - `:volname`) + or a volume served by different host like + `gluster://host:volname` (shortened form - `host:volname`). + + > **Note** + > + > Both of the above types can be accessed remotely using SSH tunnel. + > To use SSH, add an SSH prefix to either a file URL or gluster type + > URL. For example, ` ssh://root@remote-host:/path/to/dir` + > (shortened form - `root@remote-host:/path/to/dir`) or + > `ssh://root@remote-host:gluster://localhost:volname` (shortened + > from - `root@remote-host::volname`). + +This section introduces Geo-replication, illustrates the various +deployment scenarios, and explains how to configure the system to +provide replication and mirroring in your environment. + +Replicated Volumes vs Geo-replication +===================================== + +The following table lists the difference between replicated volumes and +geo-replication: + + Replicated Volumes Geo-replication + --------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------- + Mirrors data across clusters Mirrors data across geographically distributed clusters + Provides high-availability Ensures backing up of data for disaster recovery + Synchronous replication (each and every file operation is sent across all the bricks) Asynchronous replication (checks for the changes in files periodically and syncs them on detecting differences) + +Preparing to Deploy Geo-replication +=================================== + +This section provides an overview of the Geo-replication deployment +scenarios, describes how you can check the minimum system requirements, +and explores common deployment scenarios. + +- ? + +- ? + +- ? + +- ? + +- ? + +Exploring Geo-replication Deployment Scenarios +---------------------------------------------- + +Geo-replication provides an incremental replication service over Local +Area Networks (LANs), Wide Area Network (WANs), and across the Internet. +This section illustrates the most common deployment scenarios for +Geo-replication, including the following: + +- Geo-replication over LAN + +- Geo-replication over WAN + +- Geo-replication over the Internet + +- Multi-site cascading Geo-replication + +**Geo-replication over LAN** + +You can configure Geo-replication to mirror data over a Local Area +Network. + +![ Geo-replication over LAN ][] + +**Geo-replication over WAN** + +You can configure Geo-replication to replicate data over a Wide Area +Network. + +![ Geo-replication over WAN ][] + +**Geo-replication over Internet** + +You can configure Geo-replication to mirror data over the Internet. + +![ Geo-replication over Internet ][] + +**Multi-site cascading Geo-replication** + +You can configure Geo-replication to mirror data in a cascading fashion +across multiple sites. + +![ Multi-site cascading Geo-replication ][] + +Geo-replication Deployment Overview +----------------------------------- + +Deploying Geo-replication involves the following steps: + +1. Verify that your environment matches the minimum system requirement. + For more information, see ?. + +2. Determine the appropriate deployment scenario. For more information, + see ?. + +3. Start Geo-replication on master and slave systems, as required. For + more information, see ?. + +Checking Geo-replication Minimum Requirements +--------------------------------------------- + +Before deploying GlusterFS Geo-replication, verify that your systems +match the minimum requirements. + +The following table outlines the minimum requirements for both master +and slave nodes within your environment: + + Component Master Slave + ------------------------ --------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + Operating System GNU/Linux GNU/Linux + Filesystem GlusterFS 3.2 or higher GlusterFS 3.2 or higher (GlusterFS needs to be installed, but does not need to be running), ext3, ext4, or XFS (any other POSIX compliant file system would work, but has not been tested extensively) + Python Python 2.4 (with ctypes external module), or Python 2.5 (or higher) Python 2.4 (with ctypes external module), or Python 2.5 (or higher) + Secure shell OpenSSH version 4.0 (or higher) SSH2-compliant daemon + Remote synchronization rsync 3.0.7 or higher rsync 3.0.7 or higher + FUSE GlusterFS supported versions GlusterFS supported versions + +Setting Up the Environment for Geo-replication +---------------------------------------------- + +**Time Synchronization** + +- On bricks of a geo-replication master volume, all the servers' time + must be uniform. You are recommended to set up NTP (Network Time + Protocol) service to keep the bricks sync in time and avoid + out-of-time sync effect. + + For example: In a Replicated volume where brick1 of the master is at + 12.20 hrs and brick 2 of the master is at 12.10 hrs with 10 minutes + time lag, all the changes in brick2 between this period may go + unnoticed during synchronization of files with Slave. + + For more information on setting up NTP, see [][]. + +**To setup Geo-replication for SSH** + +Password-less login has to be set up between the host machine (where +geo-replication Start command will be issued) and the remote machine +(where slave process should be launched through SSH). + +1. On the node where geo-replication sessions are to be set up, run the + following command: + + `# ssh-keygen -f /var/lib/glusterd/geo-replication/secret.pem` + + Press Enter twice to avoid passphrase. + +2. Run the following command on master for all the slave hosts: + + `# ssh-copy-id -i /var/lib/glusterd/geo-replication/secret.pem.pub @` + +Setting Up the Environment for a Secure Geo-replication Slave +------------------------------------------------------------- + +You can configure a secure slave using SSH so that master is granted a +restricted access. With GlusterFS, you need not specify configuration +parameters regarding the slave on the master-side configuration. For +example, the master does not require the location of the rsync program +on slave but the slave must ensure that rsync is in the PATH of the user +which the master connects using SSH. The only information that master +and slave have to negotiate are the slave-side user account, slave's +resources that master uses as slave resources, and the master's public +key. Secure access to the slave can be established using the following +options: + +- Restricting Remote Command Execution + +- Using `Mountbroker` for Slaves + +- Using IP based Access Control + +**Backward Compatibility** + +Your existing Ge-replication environment will work with GlusterFS, +except for the following: + +- The process of secure reconfiguration affects only the glusterfs + instance on slave. The changes are transparent to master with the + exception that you may have to change the SSH target to an + unprivileged account on slave. + +- The following are the some exceptions where this might not work: + + - Geo-replication URLs which specify the slave resource when + configuring master will include the following special + characters: space, \*, ?, [; + + - Slave must have a running instance of glusterd, even if there is + no gluster volume among the mounted slave resources (that is, + file tree slaves are used exclusively) . + +### Restricting Remote Command Execution + +If you restrict remote command execution, then the Slave audits commands +coming from the master and the commands related to the given +geo-replication session is allowed. The Slave also provides access only +to the files within the slave resource which can be read or manipulated +by the Master. + +To restrict remote command execution: + +1. Identify the location of the gsyncd helper utility on Slave. This + utility is installed in `PREFIX/libexec/glusterfs/gsyncd`, where + PREFIX is a compile-time parameter of glusterfs. For example, + `--prefix=PREFIX` to the configure script with the following common + values` /usr, /usr/local, and /opt/glusterfs/glusterfs_version`. + +2. Ensure that command invoked from master to slave passed through the + slave's gsyncd utility. + + You can use either of the following two options: + + - Set gsyncd with an absolute path as the shell for the account + which the master connects through SSH. If you need to use a + privileged account, then set it up by creating a new user with + UID 0. + + - Setup key authentication with command enforcement to gsyncd. You + must prefix the copy of master's public key in the Slave + account's `authorized_keys` file with the following command: + + `command=<path to gsyncd>`. + + For example, + `command="PREFIX/glusterfs/gsyncd" ssh-rsa AAAAB3Nza....` + +### Using Mountbroker for Slaves + +`mountbroker` is a new service of glusterd. This service allows an +unprivileged process to own a GlusterFS mount by registering a label +(and DSL (Domain-specific language) options ) with glusterd through a +glusterd volfile. Using CLI, you can send a mount request to glusterd to +receive an alias (symlink) of the mounted volume. + +A request from the agent , the unprivileged slave agents use the +mountbroker service of glusterd to set up an auxiliary gluster mount for +the agent in a special environment which ensures that the agent is only +allowed to access with special parameters that provide administrative +level access to the particular volume. + +**To setup an auxiliary gluster mount for the agent**: + +1. Create a new group. For example, `geogroup`. + +2. Create a unprivileged account. For example, ` geoaccount`. Make it a + member of ` geogroup`. + +3. Create a new directory owned by root and with permissions *0711.* + For example, create a create mountbroker-root directory + `/var/mountbroker-root`. + +4. Add the following options to the glusterd volfile, assuming the name + of the slave gluster volume as `slavevol`: + + `option mountbroker-root /var/mountbroker-root ` + + `option mountbroker-geo-replication.geoaccount slavevol` + + `option geo-replication-log-group geogroup` + + If you are unable to locate the glusterd volfile at + `/etc/glusterfs/glusterd.vol`, you can create a volfile containing + both the default configuration and the above options and place it at + `/etc/glusterfs/`. + + A sample glusterd volfile along with default options: + + volume management + type mgmt/glusterd + option working-directory /var/lib/glusterd + option transport-type socket,rdma + option transport.socket.keepalive-time 10 + option transport.socket.keepalive-interval 2 + option transport.socket.read-fail-log off + + option mountbroker-root /var/mountbroker-root + option mountbroker-geo-replication.geoaccount slavevol + option geo-replication-log-group geogroup + end-volume + + If you host multiple slave volumes on Slave, you can repeat step 2. + for each of them and add the following options to the `volfile`: + + option mountbroker-geo-replication.geoaccount2 slavevol2 + option mountbroker-geo-replication.geoaccount3 slavevol3 + +5. Setup Master to access Slave as `geoaccount@Slave`. + + You can add multiple slave volumes within the same account + (geoaccount) by providing comma-separated list (without spaces) as + the argument of `mountbroker-geo-replication.geogroup`. You can also + have multiple options of the form `mountbroker-geo-replication.*`. + It is recommended to use one service account per Master machine. For + example, if there are multiple slave volumes on Slave for the master + machines Master1, Master2, and Master3, then create a dedicated + service user on Slave for them by repeating Step 2. for each (like + geogroup1, geogroup2, and geogroup3), and then add the following + corresponding options to the volfile: + + `option mountbroker-geo-replication.geoaccount1 slavevol11,slavevol12,slavevol13` + + `option mountbroker-geo-replication.geoaccount2 slavevol21,slavevol22` + + `option mountbroker-geo-replication.geoaccount3 slavevol31` + + Now set up Master1 to ssh to geoaccount1@Slave, etc. + + You must restart glusterd after making changes in the configuration + to effect the updates. + +### Using IP based Access Control + +You can use IP based access control method to provide access control for +the slave resources using IP address. You can use method for both Slave +and file tree slaves, but in the section, we are focusing on file tree +slaves using this method. + +To set access control based on IP address for file tree slaves: + +1. Set a general restriction for accessibility of file tree resources: + + `# gluster volume geo-replication '/*' config allow-network ::1,127.0.0.1 ` + + This will refuse all requests for spawning slave agents except for + requests initiated locally. + +2. If you want the to lease file tree at `/data/slave-tree` to Master, + enter the following command: + + `# gluster volume geo-replicationconfig allow-network ` + + `MasterIP` is the IP address of Master. The slave agent spawn + request from master will be accepted if it is executed at + `/data/slave-tree`. + +If the Master side network configuration does not enable the Slave to +recognize the exact IP address of Master, you can use CIDR notation to +specify a subnet instead of a single IP address as MasterIP or even +comma-separated lists of CIDR subnets. + +If you want to extend IP based access control to gluster slaves, use the +following command: + +`# gluster volume geo-replication '*' config allow-network ::1,127.0.0.1` + +Starting Geo-replication +======================== + +This section describes how to configure and start Gluster +Geo-replication in your storage environment, and verify that it is +functioning correctly. + +- ? + +- ? + +- ? + +- ? + +- ? + +Starting Geo-replication +------------------------ + +To start Gluster Geo-replication + +- Start geo-replication between the hosts using the following command: + + `# gluster volume geo-replication start` + + For example: + + # gluster volume geo-replication Volume1 example.com:/data/remote_dir start + Starting geo-replication session between Volume1 + example.com:/data/remote_dir has been successful + + > **Note** + > + > You may need to configure the service before starting Gluster + > Geo-replication. For more information, see ?. + +Verifying Successful Deployment +------------------------------- + +You can use the gluster command to verify the status of Gluster +Geo-replication in your environment. + +**To verify the status Gluster Geo-replication** + +- Verify the status by issuing the following command on host: + + `# gluster volume geo-replication status` + + For example: + + `# gluster volume geo-replication Volume1 example.com:/data/remote_dir status` + + # gluster volume geo-replication Volume1 example.com:/data/remote_dir status + + MASTER SLAVE STATUS + ______ ______________________________ ____________ + Volume1 root@example.com:/data/remote_dir Starting.... + +Displaying Geo-replication Status Information +--------------------------------------------- + +You can display status information about a specific geo-replication +master session, or a particular master-slave session, or all +geo-replication sessions, as needed. + +**To display geo-replication status information** + +- Display information of all geo-replication sessions using the + following command: + + # gluster volume geo-replication Volume1 example.com:/data/remote_dir status + + MASTER SLAVE STATUS + ______ ______________________________ ____________ + Volume1 root@example.com:/data/remote_dir Starting.... + +- Display information of a particular master slave session using the + following command: + + `# gluster volume geo-replication status` + + For example, to display information of Volume1 and + example.com:/data/remote\_dir + + `# gluster volume geo-replication Volume1 example.com:/data/remote_dir status` + + The status of the geo-replication between Volume1 and + example.com:/data/remote\_dir is displayed. + +- Display information of all geo-replication sessions belonging to a + master + + `# gluster volume geo-replication MASTER status` + + For example, to display information of Volume1 + + # gluster volume geo-replication Volume1 example.com:/data/remote_dir status + + MASTER SLAVE STATUS + ______ ______________________________ ____________ + Volume1 ssh://example.com:gluster://127.0.0.1:remove_volume OK + + Volume1 ssh://example.com:file:///data/remote_dir OK + + The status of a session could be one of the following four: + +- **Starting**: This is the initial phase of the Geo-replication + session; it remains in this state for a minute, to make sure no + abnormalities are present. + +- **OK**: The geo-replication session is in a stable state. + +- **Faulty**: The geo-replication session has witnessed some + abnormality and the situation has to be investigated further. For + further information, see ? section. + +- **Corrupt**: The monitor thread which is monitoring the + geo-replication session has died. This situation should not occur + normally, if it persists contact Red Hat Support[][1]. + +Configuring Geo-replication +--------------------------- + +To configure Gluster Geo-replication + +- Use the following command at the Gluster command line: + + `# gluster volume geo-replication config [options]` + + For more information about the options, see ?. + + For example: + + To view list of all option/value pair, use the following command: + + `# gluster volume geo-replication Volume1 example.com:/data/remote_dir config` + +Stopping Geo-replication +------------------------ + +You can use the gluster command to stop Gluster Geo-replication (syncing +of data from Master to Slave) in your environment. + +**To stop Gluster Geo-replication** + +- Stop geo-replication between the hosts using the following command: + + `# gluster volume geo-replication stop ` + + For example: + + # gluster volume geo-replication Volume1 example.com:/data/remote_dir stop + Stopping geo-replication session between Volume1 and + example.com:/data/remote_dir has been successful + + See ? for more information about the gluster command. + +Restoring Data from the Slave +============================= + +You can restore data from the slave to the master volume, whenever the +master volume becomes faulty for reasons like hardware failure. + +The example in this section assumes that you are using the Master Volume +(Volume1) with the following configuration: + + machine1# gluster volume info + Type: Distribute + Status: Started + Number of Bricks: 2 + Transport-type: tcp + Bricks: + Brick1: machine1:/export/dir16 + Brick2: machine2:/export/dir16 + Options Reconfigured: + geo-replication.indexing: on + +The data is syncing from master volume (Volume1) to slave directory +(example.com:/data/remote\_dir). To view the status of this +geo-replication session run the following command on Master: + + # gluster volume geo-replication Volume1 root@example.com:/data/remote_dir status + + MASTER SLAVE STATUS + ______ ______________________________ ____________ + Volume1 root@example.com:/data/remote_dir OK + +**Before Failure** + +Assume that the Master volume had 100 files and was mounted at +/mnt/gluster on one of the client machines (client). Run the following +command on Client machine to view the list of files: + + client# ls /mnt/gluster | wc –l + 100 + +The slave directory (example.com) will have same data as in the master +volume and same can be viewed by running the following command on slave: + + example.com# ls /data/remote_dir/ | wc –l + 100 + +**After Failure** + +If one of the bricks (machine2) fails, then the status of +Geo-replication session is changed from "OK" to "Faulty". To view the +status of this geo-replication session run the following command on +Master: + + # gluster volume geo-replication Volume1 root@example.com:/data/remote_dir status + + MASTER SLAVE STATUS + ______ ______________________________ ____________ + Volume1 root@example.com:/data/remote_dir Faulty + +Machine2 is failed and now you can see discrepancy in number of files +between master and slave. Few files will be missing from the master +volume but they will be available only on slave as shown below. + +Run the following command on Client: + + client # ls /mnt/gluster | wc –l + 52 + +Run the following command on slave (example.com): + + Example.com# # ls /data/remote_dir/ | wc –l + 100 + +**To restore data from the slave machine** + +1. Stop all Master's geo-replication sessions using the following + command: + + `# gluster volume geo-replication stop` + + For example: + + machine1# gluster volume geo-replication Volume1 + example.com:/data/remote_dir stop + + Stopping geo-replication session between Volume1 & + example.com:/data/remote_dir has been successful + + > **Note** + > + > Repeat `# gluster volume geo-replication stop `command on all + > active geo-replication sessions of master volume. + +2. Replace the faulty brick in the master by using the following + command: + + `# gluster volume replace-brick start` + + For example: + + machine1# gluster volume replace-brick Volume1 machine2:/export/dir16 machine3:/export/dir16 start + Replace-brick started successfully + +3. Commit the migration of data using the following command: + + `# gluster volume replace-brick commit force ` + + For example: + + machine1# gluster volume replace-brick Volume1 machine2:/export/dir16 machine3:/export/dir16 commit force + Replace-brick commit successful + +4. Verify the migration of brick by viewing the volume info using the + following command: + + `# gluster volume info ` + + For example: + + machine1# gluster volume info + Volume Name: Volume1 + Type: Distribute + Status: Started + Number of Bricks: 2 + Transport-type: tcp + Bricks: + Brick1: machine1:/export/dir16 + Brick2: machine3:/export/dir16 + Options Reconfigured: + geo-replication.indexing: on + +5. Run rsync command manually to sync data from slave to master + volume's client (mount point). + + For example: + + `example.com# rsync -PavhS --xattrs --ignore-existing /data/remote_dir/ client:/mnt/gluster` + + Verify that the data is synced by using the following command: + + On master volume, run the following command: + + Client # ls | wc –l + 100 + + On the Slave run the following command: + + example.com# ls /data/remote_dir/ | wc –l + 100 + + Now Master volume and Slave directory is synced. + +6. Restart geo-replication session from master to slave using the + following command: + + `# gluster volume geo-replication start ` + + For example: + + machine1# gluster volume geo-replication Volume1 + example.com:/data/remote_dir start + Starting geo-replication session between Volume1 & + example.com:/data/remote_dir has been successful + +Best Practices +============== + +**Manually Setting Time** + +If you have to change the time on your bricks manually, then you must +set uniform time on all bricks. This avoids the out-of-time sync issue +described in ?. Setting time backward corrupts the geo-replication +index, so the recommended way to set the time manually is: + +1. Stop geo-replication between the master and slave using the + following command: + + `# gluster volume geo-replication sto`p + +2. Stop the geo-replication indexing using the following command: + + `# gluster volume set geo-replication.indexing of`f + +3. Set uniform time on all bricks.s + +4. Restart your geo-replication sessions by using the following + command: + + `# gluster volume geo-replication start ` + +**Running Geo-replication commands in one system** + +It is advisable to run the geo-replication commands in one of the bricks +in the trusted storage pool. This is because, the log files for the +geo-replication session would be stored in the \*Server\* where the +Geo-replication start is initiated. Hence it would be easier to locate +the log-files when required. + +**Isolation** + +Geo-replication slave operation is not sandboxed as of now and is ran as +a privileged service. So for the security reason, it is advised to +create a sandbox environment (dedicated machine / dedicated virtual +machine / chroot/container type solution) by the administrator to run +the geo-replication slave in it. Enhancement in this regard will be +available in follow-up minor release. + + [ Geo-replication over LAN ]: images/Geo-Rep_LAN.png + [ Geo-replication over WAN ]: images/Geo-Rep_WAN.png + [ Geo-replication over Internet ]: images/Geo-Rep03_Internet.png + [ Multi-site cascading Geo-replication ]: images/Geo-Rep04_Cascading.png + []: http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Migration_Planning_Guide/ch04s07.html + [1]: www.redhat.com/support/ diff --git a/doc/admin-guide/en-US/markdown/admin_managing_volumes.md b/doc/admin-guide/en-US/markdown/admin_managing_volumes.md new file mode 100644 index 00000000000..5c1b5347982 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_managing_volumes.md @@ -0,0 +1,706 @@ +Managing GlusterFS Volumes +========================== + +This section describes how to perform common GlusterFS management +operations, including the following: + +- ? + +- ? + +- ? + +- ? + +- ? + +- ? + +- ? + +- ? + +Tuning Volume Options +===================== + +You can tune volume options, as needed, while the cluster is online and +available. + +> **Note** +> +> Red Hat recommends you to set server.allow-insecure option to ON if +> there are too many bricks in each volume or if there are too many +> services which have already utilized all the privileged ports in the +> system. Turning this option ON allows ports to accept/reject messages +> from insecure ports. So, use this option only if your deployment +> requires it. + +To tune volume options + +- Tune volume options using the following command: + + `# gluster volume set ` + + For example, to specify the performance cache size for test-volume: + + # gluster volume set test-volume performance.cache-size 256MB + Set volume successful + + The following table lists the Volume options along with its + description and default value: + + > **Note** + > + > The default options given here are subject to modification at any + > given time and may not be the same for all versions. + + ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + Option Description Default Value Available Options + -------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------------------------------- --------------------------------------------------------------------------------------- + auth.allow IP addresses of the clients which should be allowed to access the volume. \* (allow all) Valid IP address which includes wild card patterns including \*, such as 192.168.1.\* + + auth.reject IP addresses of the clients which should be denied to access the volume. NONE (reject none) Valid IP address which includes wild card patterns including \*, such as 192.168.2.\* + + client.grace-timeout Specifies the duration for the lock state to be maintained on the client after a network disconnection. 10 10 - 1800 secs + + cluster.self-heal-window-size Specifies the maximum number of blocks per file on which self-heal would happen simultaneously. 16 0 - 1025 blocks + + cluster.data-self-heal-algorithm Specifies the type of self-heal. If you set the option as "full", the entire file is copied from source to destinations. If the option is set to "diff" the file blocks that are not in sync are copied to destinations. Reset uses a heuristic model. If the file does not exist on one of the subvolumes, or a zero-byte file exists (created by entry self-heal) the entire content has to be copied anyway, so there is no benefit from using the "diff" algorithm. If the file size is about the same as page size, the entire file can be read and written with a few operations, which will be faster than "diff" which has to read checksums and then read and write. reset full | diff | reset + + cluster.min-free-disk Specifies the percentage of disk space that must be kept free. Might be useful for non-uniform bricks. 10% Percentage of required minimum free disk space + + cluster.stripe-block-size Specifies the size of the stripe unit that will be read from or written to. 128 KB (for all files) size in bytes + + cluster.self-heal-daemon Allows you to turn-off proactive self-heal on replicated volumes. on On | Off + + diagnostics.brick-log-level Changes the log-level of the bricks. INFO DEBUG|WARNING|ERROR|CRITICAL|NONE|TRACE + + diagnostics.client-log-level Changes the log-level of the clients. INFO DEBUG|WARNING|ERROR|CRITICAL|NONE|TRACE + + diagnostics.latency-measurement Statistics related to the latency of each operation would be tracked. off On | Off + + diagnostics.dump-fd-stats Statistics related to file-operations would be tracked. off On | Off + + feature.read-only Enables you to mount the entire volume as read-only for all the clients (including NFS clients) accessing it. off On | Off + + features.lock-heal Enables self-healing of locks when the network disconnects. on On | Off + + features.quota-timeout For performance reasons, quota caches the directory sizes on client. You can set timeout indicating the maximum duration of directory sizes in cache, from the time they are populated, during which they are considered valid. 0 0 - 3600 secs + + geo-replication.indexing Use this option to automatically sync the changes in the filesystem from Master to Slave. off On | Off + + network.frame-timeout The time frame after which the operation has to be declared as dead, if the server does not respond for a particular operation. 1800 (30 mins) 1800 secs + + network.ping-timeout The time duration for which the client waits to check if the server is responsive. When a ping timeout happens, there is a network disconnect between the client and server. All resources held by server on behalf of the client get cleaned up. When a reconnection happens, all resources will need to be re-acquired before the client can resume its operations on the server. Additionally, the locks will be acquired and the lock tables updated. 42 Secs 42 Secs + This reconnect is a very expensive operation and should be avoided. + + nfs.enable-ino32 For 32-bit nfs clients or applications that do not support 64-bit inode numbers or large files, use this option from the CLI to make Gluster NFS return 32-bit inode numbers instead of 64-bit inode numbers. Applications that will benefit are those that were either: off On | Off + \* Built 32-bit and run on 32-bit machines. + + \* Built 32-bit on 64-bit systems. + + \* Built 64-bit but use a library built 32-bit, especially relevant for python and perl scripts. + + Either of the conditions above can lead to application on Linux NFS clients failing with "Invalid argument" or "Value too large for defined data type" errors. + + nfs.volume-access Set the access type for the specified sub-volume. read-write read-write|read-only + + nfs.trusted-write If there is an UNSTABLE write from the client, STABLE flag will be returned to force the client to not send a COMMIT request. off On | Off + In some environments, combined with a replicated GlusterFS setup, this option can improve write performance. This flag allows users to trust Gluster replication logic to sync data to the disks and recover when required. COMMIT requests if received will be handled in a default manner by fsyncing. STABLE writes are still handled in a sync manner. + + nfs.trusted-sync All writes and COMMIT requests are treated as async. This implies that no write requests are guaranteed to be on server disks when the write reply is received at the NFS client. Trusted sync includes trusted-write behavior. off On | Off + + nfs.export-dir By default, all sub-volumes of NFS are exported as individual exports. Now, this option allows you to export only the specified subdirectory or subdirectories in the volume. This option can also be used in conjunction with nfs3.export-volumes option to restrict exports only to the subdirectories specified through this option. You must provide an absolute path. Enabled for all sub directories. Enable | Disable + + nfs.export-volumes Enable/Disable exporting entire volumes, instead if used in conjunction with nfs3.export-dir, can allow setting up only subdirectories as exports. on On | Off + + nfs.rpc-auth-unix Enable/Disable the AUTH\_UNIX authentication type. This option is enabled by default for better interoperability. However, you can disable it if required. on On | Off + + nfs.rpc-auth-null Enable/Disable the AUTH\_NULL authentication type. It is not recommended to change the default value for this option. on On | Off + + nfs.rpc-auth-allow\<IP- Addresses\> Allow a comma separated list of addresses and/or hostnames to connect to the server. By default, all clients are disallowed. This allows you to define a general rule for all exported volumes. Reject All IP address or Host name + + nfs.rpc-auth-reject IP- Addresses Reject a comma separated list of addresses and/or hostnames from connecting to the server. By default, all connections are disallowed. This allows you to define a general rule for all exported volumes. Reject All IP address or Host name + + nfs.ports-insecure Allow client connections from unprivileged ports. By default only privileged ports are allowed. This is a global setting in case insecure ports are to be enabled for all exports using a single option. off On | Off + + nfs.addr-namelookup Turn-off name lookup for incoming client connections using this option. In some setups, the name server can take too long to reply to DNS queries resulting in timeouts of mount requests. Use this option to turn off name lookups during address authentication. Note, turning this off will prevent you from using hostnames in rpc-auth.addr.\* filters. on On | Off + + nfs.register-with- portmap For systems that need to run multiple NFS servers, you need to prevent more than one from registering with portmap service. Use this option to turn off portmap registration for Gluster NFS. on On | Off + + nfs.port \<PORT- NUMBER\> Use this option on systems that need Gluster NFS to be associated with a non-default port number. 38465- 38467 + + nfs.disable Turn-off volume being exported by NFS off On | Off + + performance.write-behind-window-size Size of the per-file write-behind buffer. 1 MB Write-behind cache size + + performance.io-thread-count The number of threads in IO threads translator. 16 0 - 65 + + performance.flush-behind If this option is set ON, instructs write-behind translator to perform flush in background, by returning success (or any errors, if any of previous writes were failed) to application even before flush is sent to backend filesystem. On On | Off + + performance.cache-max-file-size Sets the maximum file size cached by the io-cache translator. Can use the normal size descriptors of KB, MB, GB,TB or PB (for example, 6GB). Maximum size uint64. 2 \^ 64 -1 bytes size in bytes + + performance.cache-min-file-size Sets the minimum file size cached by the io-cache translator. Values same as "max" above. 0B size in bytes + + performance.cache-refresh-timeout The cached data for a file will be retained till 'cache-refresh-timeout' seconds, after which data re-validation is performed. 1 sec 0 - 61 + + performance.cache-size Size of the read cache. 32 MB size in bytes + + server.allow-insecure Allow client connections from unprivileged ports. By default only privileged ports are allowed. This is a global setting in case insecure ports are to be enabled for all exports using a single option. on On | Off + + server.grace-timeout Specifies the duration for the lock state to be maintained on the server after a network disconnection. 10 10 - 1800 secs + + server.statedump-path Location of the state dump file. /tmp directory of the brick New directory path + ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + + You can view the changed volume options using + the` # gluster volume info ` command. For more information, see ?. + +Expanding Volumes +================= + +You can expand volumes, as needed, while the cluster is online and +available. For example, you might want to add a brick to a distributed +volume, thereby increasing the distribution and adding to the capacity +of the GlusterFS volume. + +Similarly, you might want to add a group of bricks to a distributed +replicated volume, increasing the capacity of the GlusterFS volume. + +> **Note** +> +> When expanding distributed replicated and distributed striped volumes, +> you need to add a number of bricks that is a multiple of the replica +> or stripe count. For example, to expand a distributed replicated +> volume with a replica count of 2, you need to add bricks in multiples +> of 2 (such as 4, 6, 8, etc.). + +**To expand a volume** + +1. On the first server in the cluster, probe the server to which you + want to add the new brick using the following command: + + `# gluster peer probe ` + + For example: + + # gluster peer probe server4 + Probe successful + +2. Add the brick using the following command: + + `# gluster volume add-brick ` + + For example: + + # gluster volume add-brick test-volume server4:/exp4 + Add Brick successful + +3. Check the volume information using the following command: + + `# gluster volume info ` + + The command displays information similar to the following: + + Volume Name: test-volume + Type: Distribute + Status: Started + Number of Bricks: 4 + Bricks: + Brick1: server1:/exp1 + Brick2: server2:/exp2 + Brick3: server3:/exp3 + Brick4: server4:/exp4 + +4. Rebalance the volume to ensure that all files are distributed to the + new brick. + + You can use the rebalance command as described in ?. + +Shrinking Volumes +================= + +You can shrink volumes, as needed, while the cluster is online and +available. For example, you might need to remove a brick that has become +inaccessible in a distributed volume due to hardware or network failure. + +> **Note** +> +> Data residing on the brick that you are removing will no longer be +> accessible at the Gluster mount point. Note however that only the +> configuration information is removed - you can continue to access the +> data directly from the brick, as necessary. + +When shrinking distributed replicated and distributed striped volumes, +you need to remove a number of bricks that is a multiple of the replica +or stripe count. For example, to shrink a distributed striped volume +with a stripe count of 2, you need to remove bricks in multiples of 2 +(such as 4, 6, 8, etc.). In addition, the bricks you are trying to +remove must be from the same sub-volume (the same replica or stripe +set). + +**To shrink a volume** + +1. Remove the brick using the following command: + + `# gluster volume remove-brick ` `start` + + For example, to remove server2:/exp2: + + # gluster volume remove-brick test-volume server2:/exp2 + + Removing brick(s) can result in data loss. Do you want to Continue? (y/n) + +2. Enter "y" to confirm the operation. The command displays the + following message indicating that the remove brick operation is + successfully started: + + Remove Brick successful + +3. (Optional) View the status of the remove brick operation using the + following command: + + `# gluster volume remove-brick `` status` + + For example, to view the status of remove brick operation on + server2:/exp2 brick: + + # gluster volume remove-brick test-volume server2:/exp2 status + Node Rebalanced-files size scanned status + --------- ---------------- ---- ------- ----------- + 617c923e-6450-4065-8e33-865e28d9428f 34 340 162 in progress + +4. Check the volume information using the following command: + + `# gluster volume info ` + + The command displays information similar to the following: + + # gluster volume info + Volume Name: test-volume + Type: Distribute + Status: Started + Number of Bricks: 3 + Bricks: + Brick1: server1:/exp1 + Brick3: server3:/exp3 + Brick4: server4:/exp4 + +5. Rebalance the volume to ensure that all files are distributed to the + new brick. + + You can use the rebalance command as described in ?. + +Migrating Volumes +================= + +You can migrate the data from one brick to another, as needed, while the +cluster is online and available. + +**To migrate a volume** + +1. Make sure the new brick, server5 in this example, is successfully + added to the cluster. + + For more information, see ?. + +2. Migrate the data from one brick to another using the following + command: + + ` # gluster volume replace-brick start` + + For example, to migrate the data in server3:/exp3 to server5:/exp5 + in test-volume: + + # gluster volume replace-brick test-volume server3:/exp3 server5:exp5 start + Replace brick start operation successful + + > **Note** + > + > You need to have the FUSE package installed on the server on which + > you are running the replace-brick command for the command to work. + +3. To pause the migration operation, if needed, use the following + command: + + `# gluster volume replace-brick pause ` + + For example, to pause the data migration from server3:/exp3 to + server5:/exp5 in test-volume: + + # gluster volume replace-brick test-volume server3:/exp3 server5:exp5 pause + Replace brick pause operation successful + +4. To abort the migration operation, if needed, use the following + command: + + ` # gluster volume replace-brick abort ` + + For example, to abort the data migration from server3:/exp3 to + server5:/exp5 in test-volume: + + # gluster volume replace-brick test-volume server3:/exp3 server5:exp5 abort + Replace brick abort operation successful + +5. Check the status of the migration operation using the following + command: + + ` # gluster volume replace-brick status ` + + For example, to check the data migration status from server3:/exp3 + to server5:/exp5 in test-volume: + + # gluster volume replace-brick test-volume server3:/exp3 server5:/exp5 status + Current File = /usr/src/linux-headers-2.6.31-14/block/Makefile + Number of files migrated = 10567 + Migration complete + + The status command shows the current file being migrated along with + the current total number of files migrated. After completion of + migration, it displays Migration complete. + +6. Commit the migration of data from one brick to another using the + following command: + + ` # gluster volume replace-brick commit ` + + For example, to commit the data migration from server3:/exp3 to + server5:/exp5 in test-volume: + + # gluster volume replace-brick test-volume server3:/exp3 server5:/exp5 commit + replace-brick commit successful + +7. Verify the migration of brick by viewing the volume info using the + following command: + + `# gluster volume info ` + + For example, to check the volume information of new brick + server5:/exp5 in test-volume: + + # gluster volume info test-volume + Volume Name: testvolume + Type: Replicate + Status: Started + Number of Bricks: 4 + Transport-type: tcp + Bricks: + Brick1: server1:/exp1 + Brick2: server2:/exp2 + Brick3: server4:/exp4 + Brick4: server5:/exp5 + + The new volume details are displayed. + + The new volume details are displayed. + + In the above example, previously, there were bricks; 1,2,3, and 4 + and now brick 3 is replaced by brick 5. + +Rebalancing Volumes +=================== + +After expanding or shrinking a volume (using the add-brick and +remove-brick commands respectively), you need to rebalance the data +among the servers. New directories created after expanding or shrinking +of the volume will be evenly distributed automatically. For all the +existing directories, the distribution can be fixed by rebalancing the +layout and/or data. + +This section describes how to rebalance GlusterFS volumes in your +storage environment, using the following common scenarios: + +- Fix Layout - Fixes the layout changes so that the files can actually + go to newly added nodes. For more information, see ?. + +- Fix Layout and Migrate Data - Rebalances volume by fixing the layout + changes and migrating the existing data. For more information, see + ?. + +Rebalancing Volume to Fix Layout Changes +---------------------------------------- + +Fixing the layout is necessary because the layout structure is static +for a given directory. In a scenario where new bricks have been added to +the existing volume, newly created files in existing directories will +still be distributed only among the old bricks. The +`# gluster volume rebalance fix-layout start `command will fix the +layout information so that the files can also go to newly added nodes. +When this command is issued, all the file stat information which is +already cached will get revalidated. + +A fix-layout rebalance will only fix the layout changes and does not +migrate data. If you want to migrate the existing data, +use`# gluster volume rebalance start ` command to rebalance data among +the servers. + +**To rebalance a volume to fix layout changes** + +- Start the rebalance operation on any one of the server using the + following command: + + `# gluster volume rebalance fix-layout start` + + For example: + + # gluster volume rebalance test-volume fix-layout start + Starting rebalance on volume test-volume has been successful + +Rebalancing Volume to Fix Layout and Migrate Data +------------------------------------------------- + +After expanding or shrinking a volume (using the add-brick and +remove-brick commands respectively), you need to rebalance the data +among the servers. + +**To rebalance a volume to fix layout and migrate the existing data** + +- Start the rebalance operation on any one of the server using the + following command: + + `# gluster volume rebalance start` + + For example: + + # gluster volume rebalance test-volume start + Starting rebalancing on volume test-volume has been successful + +- Start the migration operation forcefully on any one of the server + using the following command: + + `# gluster volume rebalance start force` + + For example: + + # gluster volume rebalance test-volume start force + Starting rebalancing on volume test-volume has been successful + +Displaying Status of Rebalance Operation +---------------------------------------- + +You can display the status information about rebalance volume operation, +as needed. + +**To view status of rebalance volume** + +- Check the status of the rebalance operation, using the following + command: + + `# gluster volume rebalance status` + + For example: + + # gluster volume rebalance test-volume status + Node Rebalanced-files size scanned status + --------- ---------------- ---- ------- ----------- + 617c923e-6450-4065-8e33-865e28d9428f 416 1463 312 in progress + + The time to complete the rebalance operation depends on the number + of files on the volume along with the corresponding file sizes. + Continue checking the rebalance status, verifying that the number of + files rebalanced or total files scanned keeps increasing. + + For example, running the status command again might display a result + similar to the following: + + # gluster volume rebalance test-volume status + Node Rebalanced-files size scanned status + --------- ---------------- ---- ------- ----------- + 617c923e-6450-4065-8e33-865e28d9428f 498 1783 378 in progress + + The rebalance status displays the following when the rebalance is + complete: + + # gluster volume rebalance test-volume status + Node Rebalanced-files size scanned status + --------- ---------------- ---- ------- ----------- + 617c923e-6450-4065-8e33-865e28d9428f 502 1873 334 completed + +Stopping Rebalance Operation +---------------------------- + +You can stop the rebalance operation, as needed. + +**To stop rebalance** + +- Stop the rebalance operation using the following command: + + `# gluster volume rebalance stop` + + For example: + + # gluster volume rebalance test-volume stop + Node Rebalanced-files size scanned status + --------- ---------------- ---- ------- ----------- + 617c923e-6450-4065-8e33-865e28d9428f 59 590 244 stopped + Stopped rebalance process on volume test-volume + +Stopping Volumes +================ + +To stop a volume + +1. Stop the volume using the following command: + + `# gluster volume stop ` + + For example, to stop test-volume: + + # gluster volume stop test-volume + Stopping volume will make its data inaccessible. Do you want to continue? (y/n) + +2. Enter `y` to confirm the operation. The output of the command + displays the following: + + Stopping volume test-volume has been successful + +Deleting Volumes +================ + +To delete a volume + +1. Delete the volume using the following command: + + `# gluster volume delete ` + + For example, to delete test-volume: + + # gluster volume delete test-volume + Deleting volume will erase all information about the volume. Do you want to continue? (y/n) + +2. Enter `y` to confirm the operation. The command displays the + following: + + Deleting volume test-volume has been successful + +Triggering Self-Heal on Replicate +================================= + +In replicate module, previously you had to manually trigger a self-heal +when a brick goes offline and comes back online, to bring all the +replicas in sync. Now the pro-active self-heal daemon runs in the +background, diagnoses issues and automatically initiates self-healing +every 10 minutes on the files which requires*healing*. + +You can view the list of files that need *healing*, the list of files +which are currently/previously *healed*, list of files which are in +split-brain state, and you can manually trigger self-heal on the entire +volume or only on the files which need *healing*. + +- Trigger self-heal only on the files which requires *healing*: + + `# gluster volume heal ` + + For example, to trigger self-heal on files which requires *healing* + of test-volume: + + # gluster volume heal test-volume + Heal operation on volume test-volume has been successful + +- Trigger self-heal on all the files of a volume: + + `# gluster volume heal ` `full` + + For example, to trigger self-heal on all the files of of + test-volume: + + # gluster volume heal test-volume full + Heal operation on volume test-volume has been successful + +- View the list of files that needs *healing*: + + `# gluster volume heal ` `info` + + For example, to view the list of files on test-volume that needs + *healing*: + + # gluster volume heal test-volume info + Brick :/gfs/test-volume_0 + Number of entries: 0 + + Brick :/gfs/test-volume_1 + Number of entries: 101 + /95.txt + /32.txt + /66.txt + /35.txt + /18.txt + /26.txt + /47.txt + /55.txt + /85.txt + ... + +- View the list of files that are self-healed: + + `# gluster volume heal ` `info healed` + + For example, to view the list of files on test-volume that are + self-healed: + + # gluster volume heal test-volume info healed + Brick :/gfs/test-volume_0 + Number of entries: 0 + + Brick :/gfs/test-volume_1 + Number of entries: 69 + /99.txt + /93.txt + /76.txt + /11.txt + /27.txt + /64.txt + /80.txt + /19.txt + /41.txt + /29.txt + /37.txt + /46.txt + ... + +- View the list of files of a particular volume on which the self-heal + failed: + + `# gluster volume heal ` `info failed` + + For example, to view the list of files of test-volume that are not + self-healed: + + # gluster volume heal test-volume info failed + Brick :/gfs/test-volume_0 + Number of entries: 0 + + Brick server2:/gfs/test-volume_3 + Number of entries: 72 + /90.txt + /95.txt + /77.txt + /71.txt + /87.txt + /24.txt + ... + +- View the list of files of a particular volume which are in + split-brain state: + + `# gluster volume heal ` `info split-brain` + + For example, to view the list of files of test-volume which are in + split-brain state: + + # gluster volume heal test-volume info split-brain + Brick server1:/gfs/test-volume_2 + Number of entries: 12 + /83.txt + /28.txt + /69.txt + ... + + Brick :/gfs/test-volume_2 + Number of entries: 12 + /83.txt + /28.txt + /69.txt + ... + + diff --git a/doc/admin-guide/en-US/markdown/admin_monitoring_workload.md b/doc/admin-guide/en-US/markdown/admin_monitoring_workload.md new file mode 100644 index 00000000000..0312bd048ea --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_monitoring_workload.md @@ -0,0 +1,931 @@ +Monitoring your GlusterFS Workload +================================== + +You can monitor the GlusterFS volumes on different parameters. +Monitoring volumes helps in capacity planning and performance tuning +tasks of the GlusterFS volume. Using these information, you can identify +and troubleshoot issues. + +You can use Volume Top and Profile commands to view the performance and +identify bottlenecks/hotspots of each brick of a volume. This helps +system administrators to get vital performance information whenever +performance needs to be probed. + +You can also perform statedump of the brick processes and nfs server +process of a volume, and also view volume status and volume information. + +Running GlusterFS Volume Profile Command +======================================== + +GlusterFS Volume Profile command provides an interface to get the +per-brick I/O information for each File Operation (FOP) of a volume. The +per brick information helps in identifying bottlenecks in the storage +system. + +This section describes how to run GlusterFS Volume Profile command by +performing the following operations: + +- ? + +- ? + +- ? + +Start Profiling +--------------- + +You must start the Profiling to view the File Operation information for +each brick. + +**To start profiling:** + +- Start profiling using the following command: + +`# gluster volume profile start ` + +For example, to start profiling on test-volume: + + # gluster volume profile test-volume start + Profiling started on test-volume + +When profiling on the volume is started, the following additional +options are displayed in the Volume Info: + + diagnostics.count-fop-hits: on + + diagnostics.latency-measurement: on + +Displaying the I/0 Information +------------------------------ + +You can view the I/O information of each brick. + +To display I/O information: + +- Display the I/O information using the following command: + +`# gluster volume profile info` + +For example, to see the I/O information on test-volume: + + # gluster volume profile test-volume info + Brick: Test:/export/2 + Cumulative Stats: + + Block 1b+ 32b+ 64b+ + Size: + Read: 0 0 0 + Write: 908 28 8 + + Block 128b+ 256b+ 512b+ + Size: + Read: 0 6 4 + Write: 5 23 16 + + Block 1024b+ 2048b+ 4096b+ + Size: + Read: 0 52 17 + Write: 15 120 846 + + Block 8192b+ 16384b+ 32768b+ + Size: + Read: 52 8 34 + Write: 234 134 286 + + Block 65536b+ 131072b+ + Size: + Read: 118 622 + Write: 1341 594 + + + %-latency Avg- Min- Max- calls Fop + latency Latency Latency + ___________________________________________________________ + 4.82 1132.28 21.00 800970.00 4575 WRITE + 5.70 156.47 9.00 665085.00 39163 READDIRP + 11.35 315.02 9.00 1433947.00 38698 LOOKUP + 11.88 1729.34 21.00 2569638.00 7382 FXATTROP + 47.35 104235.02 2485.00 7789367.00 488 FSYNC + + ------------------ + + ------------------ + + Duration : 335 + + BytesRead : 94505058 + + BytesWritten : 195571980 + +Stop Profiling +-------------- + +You can stop profiling the volume, if you do not need profiling +information anymore. + +**To stop profiling** + +- Stop profiling using the following command: + + `# gluster volume profile stop` + + For example, to stop profiling on test-volume: + + `# gluster volume profile stop` + + `Profiling stopped on test-volume` + +Running GlusterFS Volume TOP Command +==================================== + +GlusterFS Volume Top command allows you to view the glusterfs bricks’ +performance metrics like read, write, file open calls, file read calls, +file write calls, directory open calls, and directory real calls. The +top command displays up to 100 results. + +This section describes how to run and view the results for the following +GlusterFS Top commands: + +- ? + +- ? + +- ? + +- ? + +- ? + +- ? + +- ? + +Viewing Open fd Count and Maximum fd Count +------------------------------------------ + +You can view both current open fd count (list of files that are +currently the most opened and the count) on the brick and the maximum +open fd count (count of files that are the currently open and the count +of maximum number of files opened at any given point of time, since the +servers are up and running). If the brick name is not specified, then +open fd metrics of all the bricks belonging to the volume will be +displayed. + +**To view open fd count and maximum fd count:** + +- View open fd count and maximum fd count using the following command: + + `# gluster volume top open [brick ] [list-cnt ]` + + For example, to view open fd count and maximum fd count on brick + server:/export of test-volume and list top 10 open calls: + + `# gluster volume top open brick list-cnt ` + + `Brick: server:/export/dir1 ` + + `Current open fd's: 34 Max open fd's: 209 ` + + ==========Open file stats======== + + open file name + call count + + 2 /clients/client0/~dmtmp/PARADOX/ + COURSES.DB + + 11 /clients/client0/~dmtmp/PARADOX/ + ENROLL.DB + + 11 /clients/client0/~dmtmp/PARADOX/ + STUDENTS.DB + + 10 /clients/client0/~dmtmp/PWRPNT/ + TIPS.PPT + + 10 /clients/client0/~dmtmp/PWRPNT/ + PCBENCHM.PPT + + 9 /clients/client7/~dmtmp/PARADOX/ + STUDENTS.DB + + 9 /clients/client1/~dmtmp/PARADOX/ + STUDENTS.DB + + 9 /clients/client2/~dmtmp/PARADOX/ + STUDENTS.DB + + 9 /clients/client0/~dmtmp/PARADOX/ + STUDENTS.DB + + 9 /clients/client8/~dmtmp/PARADOX/ + STUDENTS.DB + +Viewing Highest File Read Calls +------------------------------- + +You can view highest read calls on each brick. If brick name is not +specified, then by default, list of 100 files will be displayed. + +**To view highest file Read calls:** + +- View highest file Read calls using the following command: + + `# gluster volume top read [brick ] [list-cnt ] ` + + For example, to view highest Read calls on brick server:/export of + test-volume: + + `# gluster volume top read brick list-cnt ` + + `Brick:` server:/export/dir1 + + ==========Read file stats======== + + read filename + call count + + 116 /clients/client0/~dmtmp/SEED/LARGE.FIL + + 64 /clients/client0/~dmtmp/SEED/MEDIUM.FIL + + 54 /clients/client2/~dmtmp/SEED/LARGE.FIL + + 54 /clients/client6/~dmtmp/SEED/LARGE.FIL + + 54 /clients/client5/~dmtmp/SEED/LARGE.FIL + + 54 /clients/client0/~dmtmp/SEED/LARGE.FIL + + 54 /clients/client3/~dmtmp/SEED/LARGE.FIL + + 54 /clients/client4/~dmtmp/SEED/LARGE.FIL + + 54 /clients/client9/~dmtmp/SEED/LARGE.FIL + + 54 /clients/client8/~dmtmp/SEED/LARGE.FIL + +Viewing Highest File Write Calls +-------------------------------- + +You can view list of files which has highest file write calls on each +brick. If brick name is not specified, then by default, list of 100 +files will be displayed. + +**To view highest file Write calls:** + +- View highest file Write calls using the following command: + + `# gluster volume top write [brick ] [list-cnt ] ` + + For example, to view highest Write calls on brick server:/export of + test-volume: + + `# gluster volume top write brick list-cnt ` + + `Brick: server:/export/dir1 ` + + ==========Write file stats======== + write call count filename + + 83 /clients/client0/~dmtmp/SEED/LARGE.FIL + + 59 /clients/client7/~dmtmp/SEED/LARGE.FIL + + 59 /clients/client1/~dmtmp/SEED/LARGE.FIL + + 59 /clients/client2/~dmtmp/SEED/LARGE.FIL + + 59 /clients/client0/~dmtmp/SEED/LARGE.FIL + + 59 /clients/client8/~dmtmp/SEED/LARGE.FIL + + 59 /clients/client5/~dmtmp/SEED/LARGE.FIL + + 59 /clients/client4/~dmtmp/SEED/LARGE.FIL + + 59 /clients/client6/~dmtmp/SEED/LARGE.FIL + + 59 /clients/client3/~dmtmp/SEED/LARGE.FIL + +Viewing Highest Open Calls on Directories +----------------------------------------- + +You can view list of files which has highest open calls on directories +of each brick. If brick name is not specified, then the metrics of all +the bricks belonging to that volume will be displayed. + +To view list of open calls on each directory + +- View list of open calls on each directory using the following + command: + + `# gluster volume top opendir [brick ] [list-cnt ] ` + + For example, to view open calls on brick server:/export/ of + test-volume: + + `# gluster volume top opendir brick list-cnt ` + + `Brick: server:/export/dir1 ` + + ==========Directory open stats======== + + Opendir count directory name + + 1001 /clients/client0/~dmtmp + + 454 /clients/client8/~dmtmp + + 454 /clients/client2/~dmtmp + + 454 /clients/client6/~dmtmp + + 454 /clients/client5/~dmtmp + + 454 /clients/client9/~dmtmp + + 443 /clients/client0/~dmtmp/PARADOX + + 408 /clients/client1/~dmtmp + + 408 /clients/client7/~dmtmp + + 402 /clients/client4/~dmtmp + +Viewing Highest Read Calls on Directory +--------------------------------------- + +You can view list of files which has highest directory read calls on +each brick. If brick name is not specified, then the metrics of all the +bricks belonging to that volume will be displayed. + +**To view list of highest directory read calls on each brick** + +- View list of highest directory read calls on each brick using the + following command: + + `# gluster volume top readdir [brick ] [list-cnt ] ` + + For example, to view highest directory read calls on brick + server:/export of test-volume: + + `# gluster volume top readdir brick list-cnt ` + + `Brick: ` + + ==========Directory readdirp stats======== + + readdirp count directory name + + 1996 /clients/client0/~dmtmp + + 1083 /clients/client0/~dmtmp/PARADOX + + 904 /clients/client8/~dmtmp + + 904 /clients/client2/~dmtmp + + 904 /clients/client6/~dmtmp + + 904 /clients/client5/~dmtmp + + 904 /clients/client9/~dmtmp + + 812 /clients/client1/~dmtmp + + 812 /clients/client7/~dmtmp + + 800 /clients/client4/~dmtmp + +Viewing List of Read Performance on each Brick +---------------------------------------------- + +You can view the read throughput of files on each brick. If brick name +is not specified, then the metrics of all the bricks belonging to that +volume will be displayed. The output will be the read throughput. + + ==========Read throughput file stats======== + + read filename Time + through + put(MBp + s) + + 2570.00 /clients/client0/~dmtmp/PWRPNT/ -2011-01-31 + TRIDOTS.POT 15:38:36.894610 + 2570.00 /clients/client0/~dmtmp/PWRPNT/ -2011-01-31 + PCBENCHM.PPT 15:38:39.815310 + 2383.00 /clients/client2/~dmtmp/SEED/ -2011-01-31 + MEDIUM.FIL 15:52:53.631499 + + 2340.00 /clients/client0/~dmtmp/SEED/ -2011-01-31 + MEDIUM.FIL 15:38:36.926198 + + 2299.00 /clients/client0/~dmtmp/SEED/ -2011-01-31 + LARGE.FIL 15:38:36.930445 + + 2259.00 /clients/client0/~dmtmp/PARADOX/ -2011-01-31 + COURSES.X04 15:38:40.549919 + + 2221.00 /clients/client0/~dmtmp/PARADOX/ -2011-01-31 + STUDENTS.VAL 15:52:53.298766 + + 2221.00 /clients/client3/~dmtmp/SEED/ -2011-01-31 + COURSES.DB 15:39:11.776780 + + 2184.00 /clients/client3/~dmtmp/SEED/ -2011-01-31 + MEDIUM.FIL 15:39:10.251764 + + 2184.00 /clients/client5/~dmtmp/WORD/ -2011-01-31 + BASEMACH.DOC 15:39:09.336572 + +This command will initiate a dd for the specified count and block size +and measures the corresponding throughput. + +**To view list of read performance on each brick** + +- View list of read performance on each brick using the following + command: + + `# gluster volume top read-perf [bs count ] [brick ] [list-cnt ]` + + For example, to view read performance on brick server:/export/ of + test-volume, 256 block size of count 1, and list count 10: + + `# gluster volume top read-perf bs 256 count 1 brick list-cnt ` + + `Brick: server:/export/dir1 256 bytes (256 B) copied, Throughput: 4.1 MB/s ` + + ==========Read throughput file stats======== + + read filename Time + through + put(MBp + s) + + 2912.00 /clients/client0/~dmtmp/PWRPNT/ -2011-01-31 + TRIDOTS.POT 15:38:36.896486 + + 2570.00 /clients/client0/~dmtmp/PWRPNT/ -2011-01-31 + PCBENCHM.PPT 15:38:39.815310 + + 2383.00 /clients/client2/~dmtmp/SEED/ -2011-01-31 + MEDIUM.FIL 15:52:53.631499 + + 2340.00 /clients/client0/~dmtmp/SEED/ -2011-01-31 + MEDIUM.FIL 15:38:36.926198 + + 2299.00 /clients/client0/~dmtmp/SEED/ -2011-01-31 + LARGE.FIL 15:38:36.930445 + + 2259.00 /clients/client0/~dmtmp/PARADOX/ -2011-01-31 + COURSES.X04 15:38:40.549919 + + 2221.00 /clients/client9/~dmtmp/PARADOX/ -2011-01-31 + STUDENTS.VAL 15:52:53.298766 + + 2221.00 /clients/client8/~dmtmp/PARADOX/ -2011-01-31 + COURSES.DB 15:39:11.776780 + + 2184.00 /clients/client3/~dmtmp/SEED/ -2011-01-31 + MEDIUM.FIL 15:39:10.251764 + + 2184.00 /clients/client5/~dmtmp/WORD/ -2011-01-31 + BASEMACH.DOC 15:39:09.336572 + + +Viewing List of Write Performance on each Brick +----------------------------------------------- + +You can view list of write throughput of files on each brick. If brick +name is not specified, then the metrics of all the bricks belonging to +that volume will be displayed. The output will be the write throughput. + +This command will initiate a dd for the specified count and block size +and measures the corresponding throughput. To view list of write +performance on each brick: + +- View list of write performance on each brick using the following + command: + + `# gluster volume top write-perf [bs count ] [brick ] [list-cnt ] ` + + For example, to view write performance on brick server:/export/ of + test-volume, 256 block size of count 1, and list count 10: + + `# gluster volume top write-perf bs 256 count 1 brick list-cnt ` + + `Brick`: server:/export/dir1 + + `256 bytes (256 B) copied, Throughput: 2.8 MB/s ` + + ==========Write throughput file stats======== + + write filename Time + throughput + (MBps) + + 1170.00 /clients/client0/~dmtmp/SEED/ -2011-01-31 + SMALL.FIL 15:39:09.171494 + + 1008.00 /clients/client6/~dmtmp/SEED/ -2011-01-31 + LARGE.FIL 15:39:09.73189 + + 949.00 /clients/client0/~dmtmp/SEED/ -2011-01-31 + MEDIUM.FIL 15:38:36.927426 + + 936.00 /clients/client0/~dmtmp/SEED/ -2011-01-31 + LARGE.FIL 15:38:36.933177 + 897.00 /clients/client5/~dmtmp/SEED/ -2011-01-31 + MEDIUM.FIL 15:39:09.33628 + + 897.00 /clients/client6/~dmtmp/SEED/ -2011-01-31 + MEDIUM.FIL 15:39:09.27713 + + 885.00 /clients/client0/~dmtmp/SEED/ -2011-01-31 + SMALL.FIL 15:38:36.924271 + + 528.00 /clients/client5/~dmtmp/SEED/ -2011-01-31 + LARGE.FIL 15:39:09.81893 + + 516.00 /clients/client6/~dmtmp/ACCESS/ -2011-01-31 + FASTENER.MDB 15:39:01.797317 + +Displaying Volume Information +============================= + +You can display information about a specific volume, or all volumes, as +needed. + +**To display volume information** + +- Display information about a specific volume using the following + command: + + `# gluster volume info ``VOLNAME` + + For example, to display information about test-volume: + + # gluster volume info test-volume + Volume Name: test-volume + Type: Distribute + Status: Created + Number of Bricks: 4 + Bricks: + Brick1: server1:/exp1 + Brick2: server2:/exp2 + Brick3: server3:/exp3 + Brick4: server4:/exp4 + +- Display information about all volumes using the following command: + + `# gluster volume info all` + + # gluster volume info all + + Volume Name: test-volume + Type: Distribute + Status: Created + Number of Bricks: 4 + Bricks: + Brick1: server1:/exp1 + Brick2: server2:/exp2 + Brick3: server3:/exp3 + Brick4: server4:/exp4 + + Volume Name: mirror + Type: Distributed-Replicate + Status: Started + Number of Bricks: 2 X 2 = 4 + Bricks: + Brick1: server1:/brick1 + Brick2: server2:/brick2 + Brick3: server3:/brick3 + Brick4: server4:/brick4 + + Volume Name: Vol + Type: Distribute + Status: Started + Number of Bricks: 1 + Bricks: + Brick: server:/brick6 + +Performing Statedump on a Volume +================================ + +Statedump is a mechanism through which you can get details of all +internal variables and state of the glusterfs process at the time of +issuing the command.You can perform statedumps of the brick processes +and nfs server process of a volume using the statedump command. The +following options can be used to determine what information is to be +dumped: + +- **mem** - Dumps the memory usage and memory pool details of the + bricks. + +- **iobuf** - Dumps iobuf details of the bricks. + +- **priv** - Dumps private information of loaded translators. + +- **callpool** - Dumps the pending calls of the volume. + +- **fd** - Dumps the open fd tables of the volume. + +- **inode** - Dumps the inode tables of the volume. + +**To display volume statedump** + +- Display statedump of a volume or NFS server using the following + command: + + `# gluster volume statedump [nfs] [all|mem|iobuf|callpool|priv|fd|inode]` + + For example, to display statedump of test-volume: + + # gluster volume statedump test-volume + Volume statedump successful + + The statedump files are created on the brick servers in the` /tmp` + directory or in the directory set using `server.statedump-path` + volume option. The naming convention of the dump file is + `<brick-path>.<brick-pid>.dump`. + +- By defult, the output of the statedump is stored at + ` /tmp/<brickname.PID.dump>` file on that particular server. Change + the directory of the statedump file using the following command: + + `# gluster volume set server.statedump-path ` + + For example, to change the location of the statedump file of + test-volume: + + # gluster volume set test-volume server.statedump-path /usr/local/var/log/glusterfs/dumps/ + Set volume successful + + You can view the changed path of the statedump file using the + following command: + + `# gluster volume info ` + +Displaying Volume Status +======================== + +You can display the status information about a specific volume, brick or +all volumes, as needed. Status information can be used to understand the +current status of the brick, nfs processes, and overall file system. +Status information can also be used to monitor and debug the volume +information. You can view status of the volume along with the following +details: + +- **detail** - Displays additional information about the bricks. + +- **clients** - Displays the list of clients connected to the volume. + +- **mem** - Displays the memory usage and memory pool details of the + bricks. + +- **inode** - Displays the inode tables of the volume. + +- **fd** - Displays the open fd (file descriptors) tables of the + volume. + +- **callpool** - Displays the pending calls of the volume. + +**To display volume status** + +- Display information about a specific volume using the following + command: + + `# gluster volume status [all| []] [detail|clients|mem|inode|fd|callpool]` + + For example, to display information about test-volume: + + # gluster volume status test-volume + STATUS OF VOLUME: test-volume + BRICK PORT ONLINE PID + -------------------------------------------------------- + arch:/export/1 24009 Y 22445 + -------------------------------------------------------- + arch:/export/2 24010 Y 22450 + +- Display information about all volumes using the following command: + + `# gluster volume status all` + + # gluster volume status all + STATUS OF VOLUME: volume-test + BRICK PORT ONLINE PID + -------------------------------------------------------- + arch:/export/4 24010 Y 22455 + + STATUS OF VOLUME: test-volume + BRICK PORT ONLINE PID + -------------------------------------------------------- + arch:/export/1 24009 Y 22445 + -------------------------------------------------------- + arch:/export/2 24010 Y 22450 + +- Display additional information about the bricks using the following + command: + + `# gluster volume status detail` + + For example, to display additional information about the bricks of + test-volume: + + # gluster volume status test-volume details + STATUS OF VOLUME: test-volume + ------------------------------------------- + Brick : arch:/export/1 + Port : 24009 + Online : Y + Pid : 16977 + File System : rootfs + Device : rootfs + Mount Options : rw + Disk Space Free : 13.8GB + Total Disk Space : 46.5GB + Inode Size : N/A + Inode Count : N/A + Free Inodes : N/A + + Number of Bricks: 1 + Bricks: + Brick: server:/brick6 + +- Display the list of clients accessing the volumes using the + following command: + + `# gluster volume status clients` + + For example, to display the list of clients connected to + test-volume: + + # gluster volume status test-volume clients + Brick : arch:/export/1 + Clients connected : 2 + Hostname Bytes Read BytesWritten + -------- --------- ------------ + 127.0.0.1:1013 776 676 + 127.0.0.1:1012 50440 51200 + +- Display the memory usage and memory pool details of the bricks using + the following command: + + `# gluster volume status mem` + + For example, to display the memory usage and memory pool details of + the bricks of test-volume: + + Memory status for volume : test-volume + ---------------------------------------------- + Brick : arch:/export/1 + Mallinfo + -------- + Arena : 434176 + Ordblks : 2 + Smblks : 0 + Hblks : 12 + Hblkhd : 40861696 + Usmblks : 0 + Fsmblks : 0 + Uordblks : 332416 + Fordblks : 101760 + Keepcost : 100400 + + Mempool Stats + ------------- + Name HotCount ColdCount PaddedSizeof AllocCount MaxAlloc + ---- -------- --------- ------------ ---------- -------- + test-volume-server:fd_t 0 16384 92 57 5 + test-volume-server:dentry_t 59 965 84 59 59 + test-volume-server:inode_t 60 964 148 60 60 + test-volume-server:rpcsvc_request_t 0 525 6372 351 2 + glusterfs:struct saved_frame 0 4096 124 2 2 + glusterfs:struct rpc_req 0 4096 2236 2 2 + glusterfs:rpcsvc_request_t 1 524 6372 2 1 + glusterfs:call_stub_t 0 1024 1220 288 1 + glusterfs:call_stack_t 0 8192 2084 290 2 + glusterfs:call_frame_t 0 16384 172 1728 6 + +- Display the inode tables of the volume using the following command: + + `# gluster volume status inode` + + For example, to display the inode tables of the test-volume: + + # gluster volume status test-volume inode + inode tables for volume test-volume + ---------------------------------------------- + Brick : arch:/export/1 + Active inodes: + GFID Lookups Ref IA type + ---- ------- --- ------- + 6f3fe173-e07a-4209-abb6-484091d75499 1 9 2 + 370d35d7-657e-44dc-bac4-d6dd800ec3d3 1 1 2 + + LRU inodes: + GFID Lookups Ref IA type + ---- ------- --- ------- + 80f98abe-cdcf-4c1d-b917-ae564cf55763 1 0 1 + 3a58973d-d549-4ea6-9977-9aa218f233de 1 0 1 + 2ce0197d-87a9-451b-9094-9baa38121155 1 0 2 + +- Display the open fd tables of the volume using the following + command: + + `# gluster volume status fd` + + For example, to display the open fd tables of the test-volume: + + # gluster volume status test-volume fd + + FD tables for volume test-volume + ---------------------------------------------- + Brick : arch:/export/1 + Connection 1: + RefCount = 0 MaxFDs = 128 FirstFree = 4 + FD Entry PID RefCount Flags + -------- --- -------- ----- + 0 26311 1 2 + 1 26310 3 2 + 2 26310 1 2 + 3 26311 3 2 + + Connection 2: + RefCount = 0 MaxFDs = 128 FirstFree = 0 + No open fds + + Connection 3: + RefCount = 0 MaxFDs = 128 FirstFree = 0 + No open fds + +- Display the pending calls of the volume using the following command: + + `# gluster volume status callpool` + + Each call has a call stack containing call frames. + + For example, to display the pending calls of test-volume: + + # gluster volume status test-volume + + Pending calls for volume test-volume + ---------------------------------------------- + Brick : arch:/export/1 + Pending calls: 2 + Call Stack1 + UID : 0 + GID : 0 + PID : 26338 + Unique : 192138 + Frames : 7 + Frame 1 + Ref Count = 1 + Translator = test-volume-server + Completed = No + Frame 2 + Ref Count = 0 + Translator = test-volume-posix + Completed = No + Parent = test-volume-access-control + Wind From = default_fsync + Wind To = FIRST_CHILD(this)->fops->fsync + Frame 3 + Ref Count = 1 + Translator = test-volume-access-control + Completed = No + Parent = repl-locks + Wind From = default_fsync + Wind To = FIRST_CHILD(this)->fops->fsync + Frame 4 + Ref Count = 1 + Translator = test-volume-locks + Completed = No + Parent = test-volume-io-threads + Wind From = iot_fsync_wrapper + Wind To = FIRST_CHILD (this)->fops->fsync + Frame 5 + Ref Count = 1 + Translator = test-volume-io-threads + Completed = No + Parent = test-volume-marker + Wind From = default_fsync + Wind To = FIRST_CHILD(this)->fops->fsync + Frame 6 + Ref Count = 1 + Translator = test-volume-marker + Completed = No + Parent = /export/1 + Wind From = io_stats_fsync + Wind To = FIRST_CHILD(this)->fops->fsync + Frame 7 + Ref Count = 1 + Translator = /export/1 + Completed = No + Parent = test-volume-server + Wind From = server_fsync_resume + Wind To = bound_xl->fops->fsync + + diff --git a/doc/admin-guide/en-US/markdown/admin_setting_volumes.md b/doc/admin-guide/en-US/markdown/admin_setting_volumes.md new file mode 100644 index 00000000000..4038523c841 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_setting_volumes.md @@ -0,0 +1,419 @@ +Setting up GlusterFS Server Volumes +=================================== + +A volume is a logical collection of bricks where each brick is an export +directory on a server in the trusted storage pool. Most of the gluster +management operations are performed on the volume. + +To create a new volume in your storage environment, specify the bricks +that comprise the volume. After you have created a new volume, you must +start it before attempting to mount it. + +- Volumes of the following types can be created in your storage + environment: + + - Distributed - Distributed volumes distributes files throughout + the bricks in the volume. You can use distributed volumes where + the requirement is to scale storage and the redundancy is either + not important or is provided by other hardware/software layers. + For more information, see ? . + + - Replicated – Replicated volumes replicates files across bricks + in the volume. You can use replicated volumes in environments + where high-availability and high-reliability are critical. For + more information, see ?. + + - Striped – Striped volumes stripes data across bricks in the + volume. For best results, you should use striped volumes only in + high concurrency environments accessing very large files. For + more information, see ?. + + - Distributed Striped - Distributed striped volumes stripe data + across two or more nodes in the cluster. You should use + distributed striped volumes where the requirement is to scale + storage and in high concurrency environments accessing very + large files is critical. For more information, see ?. + + - Distributed Replicated - Distributed replicated volumes + distributes files across replicated bricks in the volume. You + can use distributed replicated volumes in environments where the + requirement is to scale storage and high-reliability is + critical. Distributed replicated volumes also offer improved + read performance in most environments. For more information, see + ?. + + - Distributed Striped Replicated – Distributed striped replicated + volumes distributes striped data across replicated bricks in the + cluster. For best results, you should use distributed striped + replicated volumes in highly concurrent environments where + parallel access of very large files and performance is critical. + In this release, configuration of this volume type is supported + only for Map Reduce workloads. For more information, see ?. + + - Striped Replicated – Striped replicated volumes stripes data + across replicated bricks in the cluster. For best results, you + should use striped replicated volumes in highly concurrent + environments where there is parallel access of very large files + and performance is critical. In this release, configuration of + this volume type is supported only for Map Reduce workloads. For + more information, see ?. + +**To create a new volume** + +- Create a new volume : + + `# gluster volume create [stripe | replica ] [transport tcp | rdma | tcp, rdma] ` + + For example, to create a volume called test-volume consisting of + server3:/exp3 and server4:/exp4: + + # gluster volume create test-volume server3:/exp3 server4:/exp4 + Creation of test-volume has been successful + Please start the volume to access data. + +Creating Distributed Volumes +============================ + +In a distributed volumes files are spread randomly across the bricks in +the volume. Use distributed volumes where you need to scale storage and +redundancy is either not important or is provided by other +hardware/software layers. + +> **Note** +> +> Disk/server failure in distributed volumes can result in a serious +> loss of data because directory contents are spread randomly across the +> bricks in the volume. + +![][] + +**To create a distributed volume** + +1. Create a trusted storage pool as described earlier in ?. + +2. Create the distributed volume: + + `# gluster volume create [transport tcp | rdma | tcp,rdma] ` + + For example, to create a distributed volume with four storage + servers using tcp: + + # gluster volume create test-volume server1:/exp1 server2:/exp2 server3:/exp3 server4:/exp4 + Creation of test-volume has been successful + Please start the volume to access data. + + (Optional) You can display the volume information: + + # gluster volume info + Volume Name: test-volume + Type: Distribute + Status: Created + Number of Bricks: 4 + Transport-type: tcp + Bricks: + Brick1: server1:/exp1 + Brick2: server2:/exp2 + Brick3: server3:/exp3 + Brick4: server4:/exp4 + + For example, to create a distributed volume with four storage + servers over InfiniBand: + + # gluster volume create test-volume transport rdma server1:/exp1 server2:/exp2 server3:/exp3 server4:/exp4 + Creation of test-volume has been successful + Please start the volume to access data. + + If the transport type is not specified, *tcp* is used as the + default. You can also set additional options if required, such as + auth.allow or auth.reject. For more information, see ? + + > **Note** + > + > Make sure you start your volumes before you try to mount them or + > else client operations after the mount will hang, see ? for + > details. + +Creating Replicated Volumes +=========================== + +Replicated volumes create copies of files across multiple bricks in the +volume. You can use replicated volumes in environments where +high-availability and high-reliability are critical. + +> **Note** +> +> The number of bricks should be equal to of the replica count for a +> replicated volume. To protect against server and disk failures, it is +> recommended that the bricks of the volume are from different servers. + +![][1] + +**To create a replicated volume** + +1. Create a trusted storage pool as described earlier in ?. + +2. Create the replicated volume: + + `# gluster volume create [replica ] [transport tcp | rdma tcp,rdma] ` + + For example, to create a replicated volume with two storage servers: + + # gluster volume create test-volume replica 2 transport tcp server1:/exp1 server2:/exp2 + Creation of test-volume has been successful + Please start the volume to access data. + + If the transport type is not specified, *tcp* is used as the + default. You can also set additional options if required, such as + auth.allow or auth.reject. For more information, see ? + + > **Note** + > + > Make sure you start your volumes before you try to mount them or + > else client operations after the mount will hang, see ? for + > details. + +Creating Striped Volumes +======================== + +Striped volumes stripes data across bricks in the volume. For best +results, you should use striped volumes only in high concurrency +environments accessing very large files. + +> **Note** +> +> The number of bricks should be a equal to the stripe count for a +> striped volume. + +![][2] + +**To create a striped volume** + +1. Create a trusted storage pool as described earlier in ?. + +2. Create the striped volume: + + `# gluster volume create [stripe ] [transport tcp | rdma | tcp,rdma] ` + + For example, to create a striped volume across two storage servers: + + # gluster volume create test-volume stripe 2 transport tcp server1:/exp1 server2:/exp2 + Creation of test-volume has been successful + Please start the volume to access data. + + If the transport type is not specified, *tcp* is used as the + default. You can also set additional options if required, such as + auth.allow or auth.reject. For more information, see ? + + > **Note** + > + > Make sure you start your volumes before you try to mount them or + > else client operations after the mount will hang, see ? for + > details. + +Creating Distributed Striped Volumes +==================================== + +Distributed striped volumes stripes files across two or more nodes in +the cluster. For best results, you should use distributed striped +volumes where the requirement is to scale storage and in high +concurrency environments accessing very large files is critical. + +> **Note** +> +> The number of bricks should be a multiple of the stripe count for a +> distributed striped volume. + +![][3] + +**To create a distributed striped volume** + +1. Create a trusted storage pool as described earlier in ?. + +2. Create the distributed striped volume: + + `# gluster volume create [stripe ] [transport tcp | rdma | tcp,rdma] ` + + For example, to create a distributed striped volume across eight + storage servers: + + # gluster volume create test-volume stripe 4 transport tcp server1:/exp1 server2:/exp2 server3:/exp3 server4:/exp4 server5:/exp5 server6:/exp6 server7:/exp7 server8:/exp8 + Creation of test-volume has been successful + Please start the volume to access data. + + If the transport type is not specified, *tcp* is used as the + default. You can also set additional options if required, such as + auth.allow or auth.reject. For more information, see ? + + > **Note** + > + > Make sure you start your volumes before you try to mount them or + > else client operations after the mount will hang, see ? for + > details. + +Creating Distributed Replicated Volumes +======================================= + +Distributes files across replicated bricks in the volume. You can use +distributed replicated volumes in environments where the requirement is +to scale storage and high-reliability is critical. Distributed +replicated volumes also offer improved read performance in most +environments. + +> **Note** +> +> The number of bricks should be a multiple of the replica count for a +> distributed replicated volume. Also, the order in which bricks are +> specified has a great effect on data protection. Each replica\_count +> consecutive bricks in the list you give will form a replica set, with +> all replica sets combined into a volume-wide distribute set. To make +> sure that replica-set members are not placed on the same node, list +> the first brick on every server, then the second brick on every server +> in the same order, and so on. + +![][4] + +**To create a distributed replicated volume** + +1. Create a trusted storage pool as described earlier in ?. + +2. Create the distributed replicated volume: + + `# gluster volume create [replica ] [transport tcp | rdma | tcp,rdma] ` + + For example, four node distributed (replicated) volume with a + two-way mirror: + + # gluster volume create test-volume replica 2 transport tcp server1:/exp1 server2:/exp2 server3:/exp3 server4:/exp4 + Creation of test-volume has been successful + Please start the volume to access data. + + For example, to create a six node distributed (replicated) volume + with a two-way mirror: + + # gluster volume create test-volume replica 2 transport tcp server1:/exp1 server2:/exp2 server3:/exp3 server4:/exp4 server5:/exp5 server6:/exp6 + Creation of test-volume has been successful + Please start the volume to access data. + + If the transport type is not specified, *tcp* is used as the + default. You can also set additional options if required, such as + auth.allow or auth.reject. For more information, see ? + + > **Note** + > + > Make sure you start your volumes before you try to mount them or + > else client operations after the mount will hang, see ? for + > details. + +Creating Distributed Striped Replicated Volumes +=============================================== + +Distributed striped replicated volumes distributes striped data across +replicated bricks in the cluster. For best results, you should use +distributed striped replicated volumes in highly concurrent environments +where parallel access of very large files and performance is critical. +In this release, configuration of this volume type is supported only for +Map Reduce workloads. + +> **Note** +> +> The number of bricks should be a multiples of number of stripe count +> and replica count for a distributed striped replicated volume. + +**To create a distributed striped replicated volume** + +1. Create a trusted storage pool as described earlier in ?. + +2. Create a distributed striped replicated volume using the following + command: + + `# gluster volume create [stripe ] [replica ] [transport tcp | rdma | tcp,rdma] ` + + For example, to create a distributed replicated striped volume + across eight storage servers: + + # gluster volume create test-volume stripe 2 replica 2 transport tcp server1:/exp1 server2:/exp2 server3:/exp3 server4:/exp4 server5:/exp5 server6:/exp6 server7:/exp7 server8:/exp8 + Creation of test-volume has been successful + Please start the volume to access data. + + If the transport type is not specified, *tcp* is used as the + default. You can also set additional options if required, such as + auth.allow or auth.reject. For more information, see ? + + > **Note** + > + > Make sure you start your volumes before you try to mount them or + > else client operations after the mount will hang, see ? for + > details. + +Creating Striped Replicated Volumes +=================================== + +Striped replicated volumes stripes data across replicated bricks in the +cluster. For best results, you should use striped replicated volumes in +highly concurrent environments where there is parallel access of very +large files and performance is critical. In this release, configuration +of this volume type is supported only for Map Reduce workloads. + +> **Note** +> +> The number of bricks should be a multiple of the replicate count and +> stripe count for a striped replicated volume. + +![][5] + +**To create a striped replicated volume** + +1. Create a trusted storage pool consisting of the storage servers that + will comprise the volume. + + For more information, see ?. + +2. Create a striped replicated volume : + + `# gluster volume create [stripe ] [replica ] [transport tcp | rdma | tcp,rdma] ` + + For example, to create a striped replicated volume across four + storage servers: + + # gluster volume create test-volume stripe 2 replica 2 transport tcp server1:/exp1 server2:/exp2 server3:/exp3 server4:/exp4 + Creation of test-volume has been successful + Please start the volume to access data. + + To create a striped replicated volume across six storage servers: + + # gluster volume create test-volume stripe 3 replica 2 transport tcp server1:/exp1 server2:/exp2 server3:/exp3 server4:/exp4 server5:/exp5 server6:/exp6 + Creation of test-volume has been successful + Please start the volume to access data. + + If the transport type is not specified, *tcp* is used as the + default. You can also set additional options if required, such as + auth.allow or auth.reject. For more information, see ? + + > **Note** + > + > Make sure you start your volumes before you try to mount them or + > else client operations after the mount will hang, see ? for + > details. + +Starting Volumes +================ + +You must start your volumes before you try to mount them. + +**To start a volume** + +- Start a volume: + + `# gluster volume start ` + + For example, to start test-volume: + + # gluster volume start test-volume + Starting test-volume has been successful + + []: images/Distributed_Volume.png + [1]: images/Replicated_Volume.png + [2]: images/Striped_Volume.png + [3]: images/Distributed_Striped_Volume.png + [4]: images/Distributed_Replicated_Volume.png + [5]: images/Striped_Replicated_Volume.png diff --git a/doc/admin-guide/en-US/markdown/admin_settingup_clients.md b/doc/admin-guide/en-US/markdown/admin_settingup_clients.md new file mode 100644 index 00000000000..85b28c9525f --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_settingup_clients.md @@ -0,0 +1,641 @@ +Accessing Data - Setting Up GlusterFS Client +============================================ + +You can access gluster volumes in multiple ways. You can use Gluster +Native Client method for high concurrency, performance and transparent +failover in GNU/Linux clients. You can also use NFS v3 to access gluster +volumes. Extensive testing has be done on GNU/Linux clients and NFS +implementation in other operating system, such as FreeBSD, and Mac OS X, +as well as Windows 7 (Professional and Up) and Windows Server 2003. +Other NFS client implementations may work with gluster NFS server. + +You can use CIFS to access volumes when using Microsoft Windows as well +as SAMBA clients. For this access method, Samba packages need to be +present on the client side. + +Gluster Native Client +===================== + +The Gluster Native Client is a FUSE-based client running in user space. +Gluster Native Client is the recommended method for accessing volumes +when high concurrency and high write performance is required. + +This section introduces the Gluster Native Client and explains how to +install the software on client machines. This section also describes how +to mount volumes on clients (both manually and automatically) and how to +verify that the volume has mounted successfully. + +Installing the Gluster Native Client +------------------------------------ + +Before you begin installing the Gluster Native Client, you need to +verify that the FUSE module is loaded on the client and has access to +the required modules as follows: + +1. Add the FUSE loadable kernel module (LKM) to the Linux kernel: + + `# modprobe fuse` + +2. Verify that the FUSE module is loaded: + + `# dmesg | grep -i fuse ` + + `fuse init (API version 7.13)` + +### Installing on Red Hat Package Manager (RPM) Distributions + +To install Gluster Native Client on RPM distribution-based systems + +1. Install required prerequisites on the client using the following + command: + + `$ sudo yum -y install openssh-server wget fuse fuse-libs openib libibverbs` + +2. Ensure that TCP and UDP ports 24007 and 24008 are open on all + Gluster servers. Apart from these ports, you need to open one port + for each brick starting from port 24009. For example: if you have + five bricks, you need to have ports 24009 to 24013 open. + + You can use the following chains with iptables: + + `$ sudo iptables -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 24007:24008 -j ACCEPT ` + + `$ sudo iptables -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 24009:24014 -j ACCEPT` + + > **Note** + > + > If you already have iptable chains, make sure that the above + > ACCEPT rules precede the DROP rules. This can be achieved by + > providing a lower rule number than the DROP rule. + +3. Download the latest glusterfs, glusterfs-fuse, and glusterfs-rdma + RPM files to each client. The glusterfs package contains the Gluster + Native Client. The glusterfs-fuse package contains the FUSE + translator required for mounting on client systems and the + glusterfs-rdma packages contain OpenFabrics verbs RDMA module for + Infiniband. + + You can download the software at [][]. + +4. Install Gluster Native Client on the client. + + `$ sudo rpm -i glusterfs-3.3.0qa30-1.x86_64.rpm ` + + `$ sudo rpm -i glusterfs-fuse-3.3.0qa30-1.x86_64.rpm ` + + `$ sudo rpm -i glusterfs-rdma-3.3.0qa30-1.x86_64.rpm` + + > **Note** + > + > The RDMA module is only required when using Infiniband. + +### Installing on Debian-based Distributions + +To install Gluster Native Client on Debian-based distributions + +1. Install OpenSSH Server on each client using the following command: + + `$ sudo apt-get install openssh-server vim wget` + +2. Download the latest GlusterFS .deb file and checksum to each client. + + You can download the software at [][1]. + +3. For each .deb file, get the checksum (using the following command) + and compare it against the checksum for that file in the md5sum + file. + + `$ md5sum GlusterFS_DEB_file.deb ` + + The md5sum of the packages is available at: [][2] + +4. Uninstall GlusterFS v3.1 (or an earlier version) from the client + using the following command: + + `$ sudo dpkg -r glusterfs ` + + (Optional) Run `$ sudo dpkg -purge glusterfs `to purge the + configuration files. + +5. Install Gluster Native Client on the client using the following + command: + + `$ sudo dpkg -i GlusterFS_DEB_file ` + + For example: + + `$ sudo dpkg -i glusterfs-3.3.x.deb ` + +6. Ensure that TCP and UDP ports 24007 and 24008 are open on all + Gluster servers. Apart from these ports, you need to open one port + for each brick starting from port 24009. For example: if you have + five bricks, you need to have ports 24009 to 24013 open. + + You can use the following chains with iptables: + + `$ sudo iptables -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 24007:24008 -j ACCEPT ` + + `$ sudo iptables -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 24009:24014 -j ACCEPT` + + > **Note** + > + > If you already have iptable chains, make sure that the above + > ACCEPT rules precede the DROP rules. This can be achieved by + > providing a lower rule number than the DROP rule. + +### Performing a Source Installation + +To build and install Gluster Native Client from the source code + +1. Create a new directory using the following commands: + + `# mkdir glusterfs ` + + `# cd glusterfs` + +2. Download the source code. + + You can download the source at [][1]. + +3. Extract the source code using the following command: + + `# tar -xvzf SOURCE-FILE ` + +4. Run the configuration utility using the following command: + + `# ./configure ` + + `GlusterFS configure summary ` + + `================== ` + + `FUSE client : yes ` + + `Infiniband verbs : yes ` + + `epoll IO multiplex : yes ` + + `argp-standalone : no ` + + `fusermount : no ` + + `readline : yes` + + The configuration summary shows the components that will be built + with Gluster Native Client. + +5. Build the Gluster Native Client software using the following + commands: + + `# make ` + + `# make install` + +6. Verify that the correct version of Gluster Native Client is + installed, using the following command: + + `# glusterfs –-version` + +Mounting Volumes +---------------- + +After installing the Gluster Native Client, you need to mount Gluster +volumes to access data. There are two methods you can choose: + +- ? + +- ? + +After mounting a volume, you can test the mounted volume using the +procedure described in ?. + +> **Note** +> +> Server names selected during creation of Volumes should be resolvable +> in the client machine. You can use appropriate /etc/hosts entries or +> DNS server to resolve server names to IP addresses. + +### Manually Mounting Volumes + +To manually mount a Gluster volume + +- To mount a volume, use the following command: + + `# mount -t glusterfs HOSTNAME-OR-IPADDRESS:/VOLNAME MOUNTDIR` + + For example: + + `# mount -t glusterfs server1:/test-volume /mnt/glusterfs` + + > **Note** + > + > The server specified in the mount command is only used to fetch + > the gluster configuration volfile describing the volume name. + > Subsequently, the client will communicate directly with the + > servers mentioned in the volfile (which might not even include the + > one used for mount). + > + > If you see a usage message like "Usage: mount.glusterfs", mount + > usually requires you to create a directory to be used as the mount + > point. Run "mkdir /mnt/glusterfs" before you attempt to run the + > mount command listed above. + +**Mounting Options** + +You can specify the following options when using the +`mount -t glusterfs` command. Note that you need to separate all options +with commas. + +backupvolfile-server=server-name + +volfile-max-fetch-attempts=number of attempts + +log-level=loglevel + +log-file=logfile + +transport=transport-type + +direct-io-mode=[enable|disable] + +For example: + +`# mount -t glusterfs -o backupvolfile-server=volfile_server2 --volfile-max-fetch-attempts=2 log-level=WARNING,log-file=/var/log/gluster.log server1:/test-volume /mnt/glusterfs` + +If `backupvolfile-server` option is added while mounting fuse client, +when the first volfile server fails, then the server specified in +`backupvolfile-server` option is used as volfile server to mount the +client. + +In `--volfile-max-fetch-attempts=X` option, specify the number of +attempts to fetch volume files while mounting a volume. This option is +useful when you mount a server with multiple IP addresses or when +round-robin DNS is configured for the server-name.. + +### Automatically Mounting Volumes + +You can configure your system to automatically mount the Gluster volume +each time your system starts. + +The server specified in the mount command is only used to fetch the +gluster configuration volfile describing the volume name. Subsequently, +the client will communicate directly with the servers mentioned in the +volfile (which might not even include the one used for mount). + +**To automatically mount a Gluster volume** + +- To mount a volume, edit the /etc/fstab file and add the following + line: + + `HOSTNAME-OR-IPADDRESS:/VOLNAME MOUNTDIR glusterfs defaults,_netdev 0 0 ` + + For example: + + `server1:/test-volume /mnt/glusterfs glusterfs defaults,_netdev 0 0` + +**Mounting Options** + +You can specify the following options when updating the /etc/fstab file. +Note that you need to separate all options with commas. + +log-level=loglevel + +log-file=logfile + +transport=transport-type + +direct-io-mode=[enable|disable] + +For example: + +`HOSTNAME-OR-IPADDRESS:/VOLNAME MOUNTDIR glusterfs defaults,_netdev,log-level=WARNING,log-file=/var/log/gluster.log 0 0 ` + +### Testing Mounted Volumes + +To test mounted volumes + +- Use the following command: + + `# mount ` + + If the gluster volume was successfully mounted, the output of the + mount command on the client will be similar to this example: + + `server1:/test-volume on /mnt/glusterfs type fuse.glusterfs (rw,allow_other,default_permissions,max_read=131072` + +- Use the following command: + + `# df` + + The output of df command on the client will display the aggregated + storage space from all the bricks in a volume similar to this + example: + + `# df -h /mnt/glusterfs Filesystem Size Used Avail Use% Mounted on server1:/test-volume 28T 22T 5.4T 82% /mnt/glusterfs` + +- Change to the directory and list the contents by entering the + following: + + `# cd MOUNTDIR ` + + `# ls` + +- For example, + + `# cd /mnt/glusterfs ` + + `# ls` + +NFS +=== + +You can use NFS v3 to access to gluster volumes. Extensive testing has +be done on GNU/Linux clients and NFS implementation in other operating +system, such as FreeBSD, and Mac OS X, as well as Windows 7 +(Professional and Up), Windows Server 2003, and others, may work with +gluster NFS server implementation. + +GlusterFS now includes network lock manager (NLM) v4. NLM enables +applications on NFSv3 clients to do record locking on files on NFS +server. It is started automatically whenever the NFS server is run. + +You must install nfs-common package on both servers and clients (only +for Debian-based) distribution. + +This section describes how to use NFS to mount Gluster volumes (both +manually and automatically) and how to verify that the volume has been +mounted successfully. + +Using NFS to Mount Volumes +-------------------------- + +You can use either of the following methods to mount Gluster volumes: + +- ? + +- ? + +**Prerequisite**: Install nfs-common package on both servers and clients +(only for Debian-based distribution), using the following command: + +`$ sudo aptitude install nfs-common ` + +After mounting a volume, you can test the mounted volume using the +procedure described in ?. + +### Manually Mounting Volumes Using NFS + +To manually mount a Gluster volume using NFS + +- To mount a volume, use the following command: + + `# mount -t nfs -o vers=3 HOSTNAME-OR-IPADDRESS:/VOLNAME MOUNTDIR` + + For example: + + `# mount -t nfs -o vers=3 server1:/test-volume /mnt/glusterfs` + + > **Note** + > + > Gluster NFS server does not support UDP. If the NFS client you are + > using defaults to connecting using UDP, the following message + > appears: + > + > `requested NFS version or transport protocol is not supported`. + + **To connect using TCP** + +- Add the following option to the mount command: + + `-o mountproto=tcp ` + + For example: + + `# mount -o mountproto=tcp -t nfs server1:/test-volume /mnt/glusterfs` + +**To mount Gluster NFS server from a Solaris client** + +- Use the following command: + + `# mount -o proto=tcp,vers=3 nfs://HOSTNAME-OR-IPADDRESS:38467/VOLNAME MOUNTDIR` + + For example: + + ` # mount -o proto=tcp,vers=3 nfs://server1:38467/test-volume /mnt/glusterfs` + +### Automatically Mounting Volumes Using NFS + +You can configure your system to automatically mount Gluster volumes +using NFS each time the system starts. + +**To automatically mount a Gluster volume using NFS** + +- To mount a volume, edit the /etc/fstab file and add the following + line: + + `HOSTNAME-OR-IPADDRESS:/VOLNAME MOUNTDIR nfs defaults,_netdev,vers=3 0 0` + + For example, + + `server1:/test-volume /mnt/glusterfs nfs defaults,_netdev,vers=3 0 0` + + > **Note** + > + > Gluster NFS server does not support UDP. If the NFS client you are + > using defaults to connecting using UDP, the following message + > appears: + > + > `requested NFS version or transport protocol is not supported.` + + To connect using TCP + +- Add the following entry in /etc/fstab file : + + `HOSTNAME-OR-IPADDRESS:/VOLNAME MOUNTDIR nfs defaults,_netdev,mountproto=tcp 0 0` + + For example, + + `server1:/test-volume /mnt/glusterfs nfs defaults,_netdev,mountproto=tcp 0 0` + +**To automount NFS mounts** + +Gluster supports \*nix standard method of automounting NFS mounts. +Update the /etc/auto.master and /etc/auto.misc and restart the autofs +service. After that, whenever a user or process attempts to access the +directory it will be mounted in the background. + +### Testing Volumes Mounted Using NFS + +You can confirm that Gluster directories are mounting successfully. + +**To test mounted volumes** + +- Use the mount command by entering the following: + + `# mount` + + For example, the output of the mount command on the client will + display an entry like the following: + + `server1:/test-volume on /mnt/glusterfs type nfs (rw,vers=3,addr=server1)` + +- Use the df command by entering the following: + + `# df` + + For example, the output of df command on the client will display the + aggregated storage space from all the bricks in a volume. + + # df -h /mnt/glusterfs + Filesystem Size Used Avail Use% Mounted on + server1:/test-volume 28T 22T 5.4T 82% /mnt/glusterfs + +- Change to the directory and list the contents by entering the + following: + + `# cd MOUNTDIR` + + `# ls` + + For example, + + ` + + ` + + `# ls` + +CIFS +==== + +You can use CIFS to access to volumes when using Microsoft Windows as +well as SAMBA clients. For this access method, Samba packages need to be +present on the client side. You can export glusterfs mount point as the +samba export, and then mount it using CIFS protocol. + +This section describes how to mount CIFS shares on Microsoft +Windows-based clients (both manually and automatically) and how to +verify that the volume has mounted successfully. + +> **Note** +> +> CIFS access using the Mac OS X Finder is not supported, however, you +> can use the Mac OS X command line to access Gluster volumes using +> CIFS. + +Using CIFS to Mount Volumes +--------------------------- + +You can use either of the following methods to mount Gluster volumes: + +- ? + +- ? + +After mounting a volume, you can test the mounted volume using the +procedure described in ?. + +You can also use Samba for exporting Gluster Volumes through CIFS +protocol. + +### Exporting Gluster Volumes Through Samba + +We recommend you to use Samba for exporting Gluster volumes through the +CIFS protocol. + +**To export volumes through CIFS protocol** + +1. Mount a Gluster volume. For more information on mounting volumes, + see ?. + +2. Setup Samba configuration to export the mount point of the Gluster + volume. + + For example, if a Gluster volume is mounted on /mnt/gluster, you + must edit smb.conf file to enable exporting this through CIFS. Open + smb.conf file in an editor and add the following lines for a simple + configuration: + + [glustertest] + + comment = For testing a Gluster volume exported through CIFS + + path = /mnt/glusterfs + + read only = no + + guest ok = yes + +Save the changes and start the smb service using your systems init +scripts (/etc/init.d/smb [re]start). + +> **Note** +> +> To be able mount from any server in the trusted storage pool, you must +> repeat these steps on each Gluster node. For more advanced +> configurations, see Samba documentation. + +### Manually Mounting Volumes Using CIFS + +You can manually mount Gluster volumes using CIFS on Microsoft +Windows-based client machines. + +**To manually mount a Gluster volume using CIFS** + +1. Using Windows Explorer, choose **Tools \> Map Network Drive…** from + the menu. The **Map Network Drive**window appears. + +2. Choose the drive letter using the **Drive** drop-down list. + +3. Click **Browse**, select the volume to map to the network drive, and + click **OK**. + +4. Click **Finish.** + +The network drive (mapped to the volume) appears in the Computer window. + +**Alternatively, to manually mount a Gluster volume using CIFS.** + +- Click **Start \> Run** and enter the following: + + ` + + ` + + For example: + + ` + + ` + +### Automatically Mounting Volumes Using CIFS + +You can configure your system to automatically mount Gluster volumes +using CIFS on Microsoft Windows-based clients each time the system +starts. + +**To automatically mount a Gluster volume using CIFS** + +The network drive (mapped to the volume) appears in the Computer window +and is reconnected each time the system starts. + +1. Using Windows Explorer, choose **Tools \> Map Network Drive…** from + the menu. The **Map Network Drive**window appears. + +2. Choose the drive letter using the **Drive** drop-down list. + +3. Click **Browse**, select the volume to map to the network drive, and + click **OK**. + +4. Click the **Reconnect** at logon checkbox. + +5. Click **Finish.** + +### Testing Volumes Mounted Using CIFS + +You can confirm that Gluster directories are mounting successfully by +navigating to the directory using Windows Explorer. + + []: http://bits.gluster.com/gluster/glusterfs/3.3.0qa30/x86_64/ + [1]: http://www.gluster.org/download/ + [2]: http://download.gluster.com/pub/gluster/glusterfs diff --git a/doc/admin-guide/en-US/markdown/admin_start_stop_daemon.md b/doc/admin-guide/en-US/markdown/admin_start_stop_daemon.md new file mode 100644 index 00000000000..43251cd0157 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_start_stop_daemon.md @@ -0,0 +1,70 @@ +Managing the glusterd Service +============================= + +After installing GlusterFS, you must start glusterd service. The +glusterd service serves as the Gluster elastic volume manager, +overseeing glusterfs processes, and co-ordinating dynamic volume +operations, such as adding and removing volumes across multiple storage +servers non-disruptively. + +This section describes how to start the glusterd service in the +following ways: + +- ? + +- ? + +> **Note** +> +> You must start glusterd on all GlusterFS servers. + +Starting and Stopping glusterd Manually +======================================= + +This section describes how to start and stop glusterd manually + +- To start glusterd manually, enter the following command: + + `# /etc/init.d/glusterd start ` + +- To stop glusterd manually, enter the following command: + + `# /etc/init.d/glusterd stop` + +Starting glusterd Automatically +=============================== + +This section describes how to configure the system to automatically +start the glusterd service every time the system boots. + +To automatically start the glusterd service every time the system boots, +enter the following from the command line: + +`# chkconfig glusterd on ` + +Red Hat-based Systems +--------------------- + +To configure Red Hat-based systems to automatically start the glusterd +service every time the system boots, enter the following from the +command line: + +`# chkconfig glusterd on ` + +Debian-based Systems +-------------------- + +To configure Debian-based systems to automatically start the glusterd +service every time the system boots, enter the following from the +command line: + +`# update-rc.d glusterd defaults` + +Systems Other than Red Hat and Debain +------------------------------------- + +To configure systems other than Red Hat or Debian to automatically start +the glusterd service every time the system boots, enter the following +entry to the*/etc/rc.local* file: + +`# echo "glusterd" >> /etc/rc.local ` diff --git a/doc/admin-guide/en-US/markdown/admin_storage_pools.md b/doc/admin-guide/en-US/markdown/admin_storage_pools.md new file mode 100644 index 00000000000..2a35cbea57d --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_storage_pools.md @@ -0,0 +1,73 @@ +Setting up Trusted Storage Pools +================================ + +Before you can configure a GlusterFS volume, you must create a trusted +storage pool consisting of the storage servers that provides bricks to a +volume. + +A storage pool is a trusted network of storage servers. When you start +the first server, the storage pool consists of that server alone. To add +additional storage servers to the storage pool, you can use the probe +command from a storage server that is already trusted. + +> **Note** +> +> Do not self-probe the first server/localhost. + +The GlusterFS service must be running on all storage servers that you +want to add to the storage pool. See ? for more information. + +Adding Servers to Trusted Storage Pool +====================================== + +To create a trusted storage pool, add servers to the trusted storage +pool + +1. The hostnames used to create the storage pool must be resolvable by + DNS. + + To add a server to the storage pool: + + `# gluster peer probe ` + + For example, to create a trusted storage pool of four servers, add + three servers to the storage pool from server1: + + # gluster peer probe server2 + Probe successful + + # gluster peer probe server3 + Probe successful + + # gluster peer probe server4 + Probe successful + +2. Verify the peer status from the first server using the following + commands: + + # gluster peer status + Number of Peers: 3 + + Hostname: server2 + Uuid: 5e987bda-16dd-43c2-835b-08b7d55e94e5 + State: Peer in Cluster (Connected) + + Hostname: server3 + Uuid: 1e0ca3aa-9ef7-4f66-8f15-cbc348f29ff7 + State: Peer in Cluster (Connected) + + Hostname: server4 + Uuid: 3e0caba-9df7-4f66-8e5d-cbc348f29ff7 + State: Peer in Cluster (Connected) + +Removing Servers from the Trusted Storage Pool +============================================== + +To remove a server from the storage pool: + +`# gluster peer detach` + +For example, to remove server4 from the trusted storage pool: + + # gluster peer detach server4 + Detach successful diff --git a/doc/admin-guide/en-US/markdown/admin_troubleshooting.md b/doc/admin-guide/en-US/markdown/admin_troubleshooting.md new file mode 100644 index 00000000000..88fb85c240c --- /dev/null +++ b/doc/admin-guide/en-US/markdown/admin_troubleshooting.md @@ -0,0 +1,543 @@ +Troubleshooting GlusterFS +========================= + +This section describes how to manage GlusterFS logs and most common +troubleshooting scenarios related to GlusterFS. + +Managing GlusterFS Logs +======================= + +This section describes how to manage GlusterFS logs by performing the +following operation: + +- Rotating Logs + +Rotating Logs +------------- + +Administrators can rotate the log file in a volume, as needed. + +**To rotate a log file** + +- Rotate the log file using the following command: + + `# gluster volume log rotate ` + + For example, to rotate the log file on test-volume: + + # gluster volume log rotate test-volume + log rotate successful + + > **Note** + > + > When a log file is rotated, the contents of the current log file + > are moved to log-file- name.epoch-time-stamp. + +Troubleshooting Geo-replication +=============================== + +This section describes the most common troubleshooting scenarios related +to GlusterFS Geo-replication. + +Locating Log Files +------------------ + +For every Geo-replication session, the following three log files are +associated to it (four, if the slave is a gluster volume): + +- Master-log-file - log file for the process which monitors the Master + volume + +- Slave-log-file - log file for process which initiates the changes in + slave + +- Master-gluster-log-file - log file for the maintenance mount point + that Geo-replication module uses to monitor the master volume + +- Slave-gluster-log-file - is the slave's counterpart of it + +**Master Log File** + +To get the Master-log-file for geo-replication, use the following +command: + +`gluster volume geo-replication config log-file` + +For example: + +`# gluster volume geo-replication Volume1 example.com:/data/remote_dir config log-file ` + +**Slave Log File** + +To get the log file for Geo-replication on slave (glusterd must be +running on slave machine), use the following commands: + +1. On master, run the following command: + + `# gluster volume geo-replication Volume1 example.com:/data/remote_dir config session-owner 5f6e5200-756f-11e0-a1f0-0800200c9a66 ` + + Displays the session owner details. + +2. On slave, run the following command: + + `# gluster volume geo-replication /data/remote_dir config log-file /var/log/gluster/${session-owner}:remote-mirror.log ` + +3. Replace the session owner details (output of Step 1) to the output + of the Step 2 to get the location of the log file. + + `/var/log/gluster/5f6e5200-756f-11e0-a1f0-0800200c9a66:remote-mirror.log` + +Rotating Geo-replication Logs +----------------------------- + +Administrators can rotate the log file of a particular master-slave +session, as needed. When you run geo-replication's ` log-rotate` +command, the log file is backed up with the current timestamp suffixed +to the file name and signal is sent to gsyncd to start logging to a new +log file. + +**To rotate a geo-replication log file** + +- Rotate log file for a particular master-slave session using the + following command: + + `# gluster volume geo-replication log-rotate` + + For example, to rotate the log file of master `Volume1` and slave + `example.com:/data/remote_dir` : + + # gluster volume geo-replication Volume1 example.com:/data/remote_dir log rotate + log rotate successful + +- Rotate log file for all sessions for a master volume using the + following command: + + `# gluster volume geo-replication log-rotate` + + For example, to rotate the log file of master `Volume1`: + + # gluster volume geo-replication Volume1 log rotate + log rotate successful + +- Rotate log file for all sessions using the following command: + + `# gluster volume geo-replication log-rotate` + + For example, to rotate the log file for all sessions: + + # gluster volume geo-replication log rotate + log rotate successful + +Synchronization is not complete +------------------------------- + +**Description**: GlusterFS Geo-replication did not synchronize the data +completely but still the geo- replication status displayed is OK. + +**Solution**: You can enforce a full sync of the data by erasing the +index and restarting GlusterFS Geo- replication. After restarting, +GlusterFS Geo-replication begins synchronizing all the data. All files +are compared using checksum, which can be a lengthy and high resource +utilization operation on large data sets. If the error situation +persists, contact Red Hat Support. + +For more information about erasing index, see ?. + +Issues in Data Synchronization +------------------------------ + +**Description**: Geo-replication display status as OK, but the files do +not get synced, only directories and symlink gets synced with the +following error message in the log: + +[2011-05-02 13:42:13.467644] E [master:288:regjob] GMaster: failed to +sync ./some\_file\` + +**Solution**: Geo-replication invokes rsync v3.0.0 or higher on the host +and the remote machine. You must verify if you have installed the +required version. + +Geo-replication status displays Faulty very often +------------------------------------------------- + +**Description**: Geo-replication displays status as faulty very often +with a backtrace similar to the following: + +2011-04-28 14:06:18.378859] E [syncdutils:131:log\_raise\_exception] +\<top\>: FAIL: Traceback (most recent call last): File +"/usr/local/libexec/glusterfs/python/syncdaemon/syncdutils.py", line +152, in twraptf(\*aa) File +"/usr/local/libexec/glusterfs/python/syncdaemon/repce.py", line 118, in +listen rid, exc, res = recv(self.inf) File +"/usr/local/libexec/glusterfs/python/syncdaemon/repce.py", line 42, in +recv return pickle.load(inf) EOFError + +**Solution**: This error indicates that the RPC communication between +the master gsyncd module and slave gsyncd module is broken and this can +happen for various reasons. Check if it satisfies all the following +pre-requisites: + +- Password-less SSH is set up properly between the host and the remote + machine. + +- If FUSE is installed in the machine, because geo-replication module + mounts the GlusterFS volume using FUSE to sync data. + +- If the **Slave** is a volume, check if that volume is started. + +- If the Slave is a plain directory, verify if the directory has been + created already with the required permissions. + +- If GlusterFS 3.2 or higher is not installed in the default location + (in Master) and has been prefixed to be installed in a custom + location, configure the `gluster-command` for it to point to the + exact location. + +- If GlusterFS 3.2 or higher is not installed in the default location + (in slave) and has been prefixed to be installed in a custom + location, configure the `remote-gsyncd-command` for it to point to + the exact place where gsyncd is located. + +Intermediate Master goes to Faulty State +---------------------------------------- + +**Description**: In a cascading set-up, the intermediate master goes to +faulty state with the following log: + +raise RuntimeError ("aborting on uuid change from %s to %s" % \\ +RuntimeError: aborting on uuid change from af07e07c-427f-4586-ab9f- +4bf7d299be81 to de6b5040-8f4e-4575-8831-c4f55bd41154 + +**Solution**: In a cascading set-up the Intermediate master is loyal to +the original primary master. The above log means that the +geo-replication module has detected change in primary master. If this is +the desired behavior, delete the config option volume-id in the session +initiated from the intermediate master. + +Troubleshooting POSIX ACLs +========================== + +This section describes the most common troubleshooting issues related to +POSIX ACLs. + +setfacl command fails with “setfacl: \<file or directory name\>: Operation not supported” error +----------------------------------------------------------------------------------------------- + +You may face this error when the backend file systems in one of the +servers is not mounted with the "-o acl" option. The same can be +confirmed by viewing the following error message in the log file of the +server "Posix access control list is not supported". + +**Solution**: Remount the backend file system with "-o acl" option. For +more information, see ?. + +Troubleshooting Hadoop Compatible Storage +========================================= + +This section describes the most common troubleshooting issues related to +Hadoop Compatible Storage. + +Time Sync +--------- + +Running MapReduce job may throw exceptions if the time is out-of-sync on +the hosts in the cluster. + +**Solution**: Sync the time on all hosts using ntpd program. + +Troubleshooting NFS +=================== + +This section describes the most common troubleshooting issues related to +NFS . + +mount command on NFS client fails with “RPC Error: Program not registered” +-------------------------------------------------------------------------- + +Start portmap or rpcbind service on the NFS server. + +This error is encountered when the server has not started correctly. + +On most Linux distributions this is fixed by starting portmap: + +`$ /etc/init.d/portmap start` + +On some distributions where portmap has been replaced by rpcbind, the +following command is required: + +`$ /etc/init.d/rpcbind start ` + +After starting portmap or rpcbind, gluster NFS server needs to be +restarted. + +NFS server start-up fails with “Port is already in use” error in the log file." +------------------------------------------------------------------------------- + +Another Gluster NFS server is running on the same machine. + +This error can arise in case there is already a Gluster NFS server +running on the same machine. This situation can be confirmed from the +log file, if the following error lines exist: + + [2010-05-26 23:40:49] E [rpc-socket.c:126:rpcsvc_socket_listen] rpc-socket: binding socket failed:Address already in use + [2010-05-26 23:40:49] E [rpc-socket.c:129:rpcsvc_socket_listen] rpc-socket: Port is already in use + [2010-05-26 23:40:49] E [rpcsvc.c:2636:rpcsvc_stage_program_register] rpc-service: could not create listening connection + [2010-05-26 23:40:49] E [rpcsvc.c:2675:rpcsvc_program_register] rpc-service: stage registration of program failed + [2010-05-26 23:40:49] E [rpcsvc.c:2695:rpcsvc_program_register] rpc-service: Program registration failed: MOUNT3, Num: 100005, Ver: 3, Port: 38465 + [2010-05-26 23:40:49] E [nfs.c:125:nfs_init_versions] nfs: Program init failed + [2010-05-26 23:40:49] C [nfs.c:531:notify] nfs: Failed to initialize protocols + +To resolve this error one of the Gluster NFS servers will have to be +shutdown. At this time, Gluster NFS server does not support running +multiple NFS servers on the same machine. + +mount command fails with “rpc.statd” related error message +---------------------------------------------------------- + +If the mount command fails with the following error message: + +mount.nfs: rpc.statd is not running but is required for remote locking. +mount.nfs: Either use '-o nolock' to keep locks local, or start statd. + +Start rpc.statd + +For NFS clients to mount the NFS server, rpc.statd service must be +running on the clients. + +Start rpc.statd service by running the following command: + +`$ rpc.statd ` + +mount command takes too long to finish. +--------------------------------------- + +Start rpcbind service on the NFS client. + +The problem is that the rpcbind or portmap service is not running on the +NFS client. The resolution for this is to start either of these services +by running the following command: + +`$ /etc/init.d/portmap start` + +On some distributions where portmap has been replaced by rpcbind, the +following command is required: + +`$ /etc/init.d/rpcbind start` + +NFS server glusterfsd starts but initialization fails with “nfsrpc- service: portmap registration of program failed” error message in the log. +---------------------------------------------------------------------------------------------------------------------------------------------- + +NFS start-up can succeed but the initialization of the NFS service can +still fail preventing clients from accessing the mount points. Such a +situation can be confirmed from the following error messages in the log +file: + + [2010-05-26 23:33:47] E [rpcsvc.c:2598:rpcsvc_program_register_portmap] rpc-service: Could notregister with portmap + [2010-05-26 23:33:47] E [rpcsvc.c:2682:rpcsvc_program_register] rpc-service: portmap registration of program failed + [2010-05-26 23:33:47] E [rpcsvc.c:2695:rpcsvc_program_register] rpc-service: Program registration failed: MOUNT3, Num: 100005, Ver: 3, Port: 38465 + [2010-05-26 23:33:47] E [nfs.c:125:nfs_init_versions] nfs: Program init failed + [2010-05-26 23:33:47] C [nfs.c:531:notify] nfs: Failed to initialize protocols + [2010-05-26 23:33:49] E [rpcsvc.c:2614:rpcsvc_program_unregister_portmap] rpc-service: Could not unregister with portmap + [2010-05-26 23:33:49] E [rpcsvc.c:2731:rpcsvc_program_unregister] rpc-service: portmap unregistration of program failed + [2010-05-26 23:33:49] E [rpcsvc.c:2744:rpcsvc_program_unregister] rpc-service: Program unregistration failed: MOUNT3, Num: 100005, Ver: 3, Port: 38465 + +1. Start portmap or rpcbind service on the NFS server. + + On most Linux distributions, portmap can be started using the + following command: + + `$ /etc/init.d/portmap start ` + + On some distributions where portmap has been replaced by rpcbind, + run the following command: + + `$ /etc/init.d/rpcbind start ` + + After starting portmap or rpcbind, gluster NFS server needs to be + restarted. + +2. Stop another NFS server running on the same machine. + + Such an error is also seen when there is another NFS server running + on the same machine but it is not the Gluster NFS server. On Linux + systems, this could be the kernel NFS server. Resolution involves + stopping the other NFS server or not running the Gluster NFS server + on the machine. Before stopping the kernel NFS server, ensure that + no critical service depends on access to that NFS server's exports. + + On Linux, kernel NFS servers can be stopped by using either of the + following commands depending on the distribution in use: + + `$ /etc/init.d/nfs-kernel-server stop` + + `$ /etc/init.d/nfs stop` + +3. Restart Gluster NFS server. + +mount command fails with NFS server failed error. +------------------------------------------------- + +mount command fails with following error + +*mount: mount to NFS server '10.1.10.11' failed: timed out (retrying).* + +Perform one of the following to resolve this issue: + +1. Disable name lookup requests from NFS server to a DNS server. + + The NFS server attempts to authenticate NFS clients by performing a + reverse DNS lookup to match hostnames in the volume file with the + client IP addresses. There can be a situation where the NFS server + either is not able to connect to the DNS server or the DNS server is + taking too long to responsd to DNS request. These delays can result + in delayed replies from the NFS server to the NFS client resulting + in the timeout error seen above. + + NFS server provides a work-around that disables DNS requests, + instead relying only on the client IP addresses for authentication. + The following option can be added for successful mounting in such + situations: + + `option rpc-auth.addr.namelookup off ` + + > **Note** + > + > Note: Remember that disabling the NFS server forces authentication + > of clients to use only IP addresses and if the authentication + > rules in the volume file use hostnames, those authentication rules + > will fail and disallow mounting for those clients. + + or + +2. NFS version used by the NFS client is other than version 3. + + Gluster NFS server supports version 3 of NFS protocol. In recent + Linux kernels, the default NFS version has been changed from 3 to 4. + It is possible that the client machine is unable to connect to the + Gluster NFS server because it is using version 4 messages which are + not understood by Gluster NFS server. The timeout can be resolved by + forcing the NFS client to use version 3. The **vers** option to + mount command is used for this purpose: + + `$ mount -o vers=3 ` + +showmount fails with clnt\_create: RPC: Unable to receive +--------------------------------------------------------- + +Check your firewall setting to open ports 111 for portmap +requests/replies and Gluster NFS server requests/replies. Gluster NFS +server operates over the following port numbers: 38465, 38466, and +38467. + +For more information, see ?. + +Application fails with "Invalid argument" or "Value too large for defined data type" error. +------------------------------------------------------------------------------------------- + +These two errors generally happen for 32-bit nfs clients or applications +that do not support 64-bit inode numbers or large files. Use the +following option from the CLI to make Gluster NFS return 32-bit inode +numbers instead: nfs.enable-ino32 \<on|off\> + +Applications that will benefit are those that were either: + +- built 32-bit and run on 32-bit machines such that they do not + support large files by default + +- built 32-bit on 64-bit systems + +This option is disabled by default so NFS returns 64-bit inode numbers +by default. + +Applications which can be rebuilt from source are recommended to rebuild +using the following flag with gcc: + +` -D_FILE_OFFSET_BITS=64` + +Troubleshooting File Locks +========================== + +In GlusterFS 3.3 you can use `statedump` command to list the locks held +on files. The statedump output also provides information on each lock +with its range, basename, PID of the application holding the lock, and +so on. You can analyze the output to know about the locks whose +owner/application is no longer running or interested in that lock. After +ensuring that the no application is using the file, you can clear the +lock using the following `clear lock` command: + +`# ` + +For more information on performing `statedump`, see ? + +**To identify locked file and clear locks** + +1. Perform statedump on the volume to view the files that are locked + using the following command: + + `# gluster volume statedump inode` + + For example, to display statedump of test-volume: + + # gluster volume statedump test-volume + Volume statedump successful + + The statedump files are created on the brick servers in the` /tmp` + directory or in the directory set using `server.statedump-path` + volume option. The naming convention of the dump file is + `<brick-path>.<brick-pid>.dump`. + + The following are the sample contents of the statedump file. It + indicates that GlusterFS has entered into a state where there is an + entry lock (entrylk) and an inode lock (inodelk). Ensure that those + are stale locks and no resources own them. + + [xlator.features.locks.vol-locks.inode] + path=/ + mandatory=0 + entrylk-count=1 + lock-dump.domain.domain=vol-replicate-0 + xlator.feature.locks.lock-dump.domain.entrylk.entrylk[0](ACTIVE)=type=ENTRYLK_WRLCK on basename=file1, pid = 714782904, owner=ffffff2a3c7f0000, transport=0x20e0670, , granted at Mon Feb 27 16:01:01 2012 + + conn.2.bound_xl./gfs/brick1.hashsize=14057 + conn.2.bound_xl./gfs/brick1.name=/gfs/brick1/inode + conn.2.bound_xl./gfs/brick1.lru_limit=16384 + conn.2.bound_xl./gfs/brick1.active_size=2 + conn.2.bound_xl./gfs/brick1.lru_size=0 + conn.2.bound_xl./gfs/brick1.purge_size=0 + + [conn.2.bound_xl./gfs/brick1.active.1] + gfid=538a3d4a-01b0-4d03-9dc9-843cd8704d07 + nlookup=1 + ref=2 + ia_type=1 + [xlator.features.locks.vol-locks.inode] + path=/file1 + mandatory=0 + inodelk-count=1 + lock-dump.domain.domain=vol-replicate-0 + inodelk.inodelk[0](ACTIVE)=type=WRITE, whence=0, start=0, len=0, pid = 714787072, owner=00ffff2a3c7f0000, transport=0x20e0670, , granted at Mon Feb 27 16:01:01 2012 + +2. Clear the lock using the following command: + + `# ` + + For example, to clear the entry lock on `file1` of test-volume: + + # gluster volume clear-locks test-volume / kind granted entry file1 + Volume clear-locks successful + vol-locks: entry blocked locks=0 granted locks=1 + +3. Clear the inode lock using the following command: + + `# ` + + For example, to clear the inode lock on `file1` of test-volume: + + # gluster volume clear-locks test-volume /file1 kind granted inode 0,0-0 + Volume clear-locks successful + vol-locks: inode blocked locks=0 granted locks=1 + + You can perform statedump on test-volume again to verify that the + above inode and entry locks are cleared. + + diff --git a/doc/admin-guide/en-US/markdown/gfs_introduction.md b/doc/admin-guide/en-US/markdown/gfs_introduction.md new file mode 100644 index 00000000000..291d7c555c1 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/gfs_introduction.md @@ -0,0 +1,50 @@ +Introducing Gluster File System +=============================== + +GlusterFS is an open source, clustered file system capable of scaling to +several petabytes and handling thousands of clients. GlusterFS can be +flexibly combined with commodity physical, virtual, and cloud resources +to deliver highly available and performant enterprise storage at a +fraction of the cost of traditional solutions. + +GlusterFS clusters together storage building blocks over Infiniband RDMA +and/or TCP/IP interconnect, aggregating disk and memory resources and +managing data in a single global namespace. GlusterFS is based on a +stackable user space design, delivering exceptional performance for +diverse workloads. + +![ Virtualized Cloud Environments ][] + +GlusterFS is designed for today's high-performance, virtualized cloud +environments. Unlike traditional data centers, cloud environments +require multi-tenancy along with the ability to grow or shrink resources +on demand. Enterprises can scale capacity, performance, and availability +on demand, with no vendor lock-in, across on-premise, public cloud, and +hybrid environments. + +GlusterFS is in production at thousands of enterprises spanning media, +healthcare, government, education, web 2.0, and financial services. The +following table lists the commercial offerings and its documentation +location: + + ------------------------------------------------------------------------ + Product Documentation Location + ----------- ------------------------------------------------------------ + Red Hat [][] + Storage + Software + Appliance + + Red Hat [][1] + Virtual + Storage + Appliance + + Red Hat [][2] + Storage + ------------------------------------------------------------------------ + + [ Virtualized Cloud Environments ]: images/640px-GlusterFS_3.2_Architecture.png + []: http://docs.redhat.com/docs/en-US/Red_Hat_Storage_Software_Appliance/index.html + [1]: http://docs.redhat.com/docs/en-US/Red_Hat_Virtual_Storage_Appliance/index.html + [2]: http://docs.redhat.com/docs/en-US/Red_Hat_Storage/index.html diff --git a/doc/admin-guide/en-US/markdown/glossary.md b/doc/admin-guide/en-US/markdown/glossary.md new file mode 100644 index 00000000000..0febaff8fb8 --- /dev/null +++ b/doc/admin-guide/en-US/markdown/glossary.md @@ -0,0 +1,134 @@ +Glossary +======== + +Brick +: A Brick is the GlusterFS basic unit of storage, represented by an + export directory on a server in the trusted storage pool. A Brick is + expressed by combining a server with an export directory in the + following format: + + `SERVER:EXPORT` + + For example: + + `myhostname:/exports/myexportdir/` + +Cluster +: A cluster is a group of linked computers, working together closely + thus in many respects forming a single computer. + +Distributed File System +: A file system that allows multiple clients to concurrently access + data over a computer network. + +Filesystem +: A method of storing and organizing computer files and their data. + Essentially, it organizes these files into a database for the + storage, organization, manipulation, and retrieval by the computer's + operating system. + + Source: [Wikipedia][] + +FUSE +: Filesystem in Userspace (FUSE) is a loadable kernel module for + Unix-like computer operating systems that lets non-privileged users + create their own file systems without editing kernel code. This is + achieved by running file system code in user space while the FUSE + module provides only a "bridge" to the actual kernel interfaces. + + Source: [Wikipedia][1] + +Geo-Replication +: Geo-replication provides a continuous, asynchronous, and incremental + replication service from site to another over Local Area Networks + (LAN), Wide Area Network (WAN), and across the Internet. + +glusterd +: The Gluster management daemon that needs to run on all servers in + the trusted storage pool. + +Metadata +: Metadata is data providing information about one or more other + pieces of data. + +Namespace +: Namespace is an abstract container or environment created to hold a + logical grouping of unique identifiers or symbols. Each Gluster + volume exposes a single namespace as a POSIX mount point that + contains every file in the cluster. + +Open Source +: Open source describes practices in production and development that + promote access to the end product's source materials. Some consider + open source a philosophy, others consider it a pragmatic + methodology. + + Before the term open source became widely adopted, developers and + producers used a variety of phrases to describe the concept; open + source gained hold with the rise of the Internet, and the attendant + need for massive retooling of the computing source code. + + Opening the source code enabled a self-enhancing diversity of + production models, communication paths, and interactive communities. + Subsequently, a new, three-word phrase "open source software" was + born to describe the environment that the new copyright, licensing, + domain, and consumer issues created. + + Source: [Wikipedia][2] + +Petabyte +: A petabyte (derived from the SI prefix peta- ) is a unit of + information equal to one quadrillion (short scale) bytes, or 1000 + terabytes. The unit symbol for the petabyte is PB. The prefix peta- + (P) indicates a power of 1000: + + 1 PB = 1,000,000,000,000,000 B = 10005 B = 1015 B. + + The term "pebibyte" (PiB), using a binary prefix, is used for the + corresponding power of 1024. + + Source: [Wikipedia][3] + +POSIX +: Portable Operating System Interface (for Unix) is the name of a + family of related standards specified by the IEEE to define the + application programming interface (API), along with shell and + utilities interfaces for software compatible with variants of the + Unix operating system. Gluster exports a fully POSIX compliant file + system. + +RAID +: Redundant Array of Inexpensive Disks (RAID) is a technology that + provides increased storage reliability through redundancy, combining + multiple low-cost, less-reliable disk drives components into a + logical unit where all drives in the array are interdependent. + +RRDNS +: Round Robin Domain Name Service (RRDNS) is a method to distribute + load across application servers. RRDNS is implemented by creating + multiple A records with the same name and different IP addresses in + the zone file of a DNS server. + +Trusted Storage Pool +: A storage pool is a trusted network of storage servers. When you + start the first server, the storage pool consists of that server + alone. + +Userspace +: Applications running in user space don’t directly interact with + hardware, instead using the kernel to moderate access. Userspace + applications are generally more portable than applications in kernel + space. Gluster is a user space application. + +Volfile +: Volfile is a configuration file used by glusterfs process. Volfile + will be usually located at `/var/lib/glusterd/vols/VOLNAME`. + +Volume +: A volume is a logical collection of bricks. Most of the gluster + management operations happen on the volume. + + [Wikipedia]: http://en.wikipedia.org/wiki/Filesystem + [1]: http://en.wikipedia.org/wiki/Filesystem_in_Userspace + [2]: http://en.wikipedia.org/wiki/Open_source + [3]: http://en.wikipedia.org/wiki/Petabyte |