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diff --git a/Features/ovirt-integration.md b/Features/ovirt-integration.md new file mode 100644 index 0000000..46dbeab --- /dev/null +++ b/Features/ovirt-integration.md @@ -0,0 +1,106 @@ +##Ovirt Integration with glusterfs + +oVirt is an opensource virtualization management platform. You can use oVirt to manage +hardware nodes, storage and network resources, and to deploy and monitor virtual machines +running in your data center. oVirt serves as the bedrock for Red Hat''s Enterprise Virtualization product, +and is the "upstream" project where new features are developed in advance of their inclusion +in that supported product offering. + +To know more about ovirt please visit http://www.ovirt.org/ and to configure +#http://www.ovirt.org/Quick_Start_Guide#Install_oVirt_Engine_.28Fedora.29%60 + +For the installation step of ovirt, please refer +#http://www.ovirt.org/Quick_Start_Guide#Install_oVirt_Engine_.28Fedora.29%60 + +When oVirt integrated with gluster, glusterfs can be used in below forms: + +* As a storage domain to host VM disks. + +There are mainly two ways to exploit glusterfs as a storage domain. + - POSIXFS_DOMAIN ( >=oVirt 3.1 ) + - GLUSTERFS_DOMAIN ( >=oVirt 3.3) + +The former one has performance overhead and is not an ideal way to consume images hosted in glusterfs volumes. +When used by this method, qemu uses glusterfs `mount point` to access VM images and invite FUSE overhead. +The libvirt treats this as a file type disk in its xml schema. + +The latter is the recommended way of using glusterfs with ovirt as a storage domain. This provides better +and efficient way to access images hosted under glusterfs volumes.When qemu accessing glusterfs volume using this method, +it make use of `libgfapi` implementation of glusterfs and this method is called native integration. +Here the glusterfs is added as a block backend to qemu and libvirt treat this as a `network` type disk. + +For more details on this, please refer # http://www.ovirt.org/Features/GlusterFS_Storage_Domain +However there are 2 bugs which block usage of this feature. + +https://bugzilla.redhat.com/show_bug.cgi?id=1022961 +https://bugzilla.redhat.com/show_bug.cgi?id=1017289 + +Please check above bugs for latest status. + +* To manage gluster trusted pools. + +oVirt web admin console can be used to - + - add new / import existing gluster cluster + - add/delete volumes + - add/delete bricks + - set/reset volume options + - optimize volume for virt store + - Rebalance and Remove bricks + - Monitor gluster deployment - node, brick, volume status, + Enhanced service monitoring (Physical node resources as well Quota, geo-rep and self-heal status) through Nagios integration(>=oVirt 3.4) + + + +When configuing ovirt to manage only gluster cluster/trusted pool, you need to select `gluster` as an input for +`Application mode` in OVIRT ENGINE CONFIGURATION option of `engine-setup` command. +Refer # http://www.ovirt.org/Quick_Start_Guide#Install_oVirt_Engine_.28Fedora.29%60 + +If you want to use gluster as both ( as a storage domain to host VM disks and to manage gluster trusted pools) +you need to input `both` as a value for `Application mode` in engine-setup command. + +Once you have successfully installed oVirt Engine as mentioned above, you will be provided with instructions +to access oVirt''s web console. + +Below example shows how to configure gluster nodes in fedora. + + +#Configuring gluster nodes. + +On the machine designated as your host, install any supported distribution( ex:Fedora/CentOS/RHEL...etc). +A minimal installation is sufficient. + +Refer # http://www.ovirt.org/Quick_Start_Guide#Install_Hosts + + +##Connect to Ovirt Engine + +Log In to Administration Console + +Ensure that you have the administrator password configured during installation of oVirt engine. + +- To connect to oVirt webadmin console + + +Open a browser and navigate to https://domain.example.com/webadmin. Substitute domain.example.com with the URL provided during installation + +If this is your first time connecting to the administration console, oVirt Engine will issue +security certificates for your browser. Click the link labelled this certificate to trust the +ca.cer certificate. A pop-up displays, click Open to launch the Certificate dialog. +Click `Install Certificate` and select to place the certificate in Trusted Root Certification Authorities store. + + +The console login screen displays. Enter admin as your User Name, and enter the Password that +you provided during installation. Ensure that your domain is set to Internal. Click Login. + + +You have now successfully logged in to the oVirt web administration console. Here, you can configure and manage all your gluster resources. + +To manage gluster trusted pool: + +- Create a cluster with "Enable gluster service" - turned on. (Turn on "Enable virt service" if the same nodes are used as hypervisor as well) +- Add hosts which have already been set up as in step Configuring gluster nodes. +- Create a volume, and click on "Optimize for virt store",This sets the volume tunables optimize volume to be used as an image store + +To use this volume as a storage domain: + +Please refer `User interface` section of www.ovirt.org/Features/GlusterFS_Storage_Domain |