thin-arbiter : Provide scripts and service file to start thin-arbiter process

1 - setup-thin-arbiter.sh
To setup directory path for thin-arbiter. This is the path where replica id
file will be placed and used by TA process.
By default it will be /mnt/thin-arbiter. It is better to use default path
and once set it should not be changed.

2 - gluster-ta-volume.service
This is the Unit file used by systemd to start and keep the thin-arbiter
process running.

3 - thin-arbiter.vol
This is the default volume file for thin-arbiter. It will be used to start
thin-arbiter process. This should not be modified by user except the
directory path which can be modified using [1].

Change-Id: I68f2164f24adfa326c1d1a7a98c6ac4ff04ed553
fixes: bz#1579786
Signed-off-by: Ashish Pandey <aspandey@redhat.com>

3 files changed, 138 insertions, 0 deletions

diff --git a/extras/thin-arbiter/gluster-ta-volume.service b/extras/thin-arbiter/gluster-ta-volume.service
new file mode 100644
index 00000000000..19be1757555
--- /dev/null
+++ b/extras/thin-arbiter/gluster-ta-volume.service
@@ -0,0 +1,13 @@
+[Unit]
+Description = Thin-arbiter process to maintain quorum for replica volume
+After = network.target
+
+[Service]
+Environment = "LOG_LEVEL=WARNING"
+ExecStart = /usr/local/sbin/glusterfsd -N --volfile-id ta-vol -f /var/lib/glusterd/thin-arbiter/thin-arbiter.vol --brick-port 24007 --xlator-option ta-vol-server.transport.socket.listen-port=24007
+Restart = always
+KillMode=process
+SuccessExitStatus=15
+
+[Install]
+WantedBy = multi-user.target
diff --git a/extras/thin-arbiter/setup-thin-arbiter.sh b/extras/thin-arbiter/setup-thin-arbiter.sh
new file mode 100755
index 00000000000..32fe7fc0cdd
--- /dev/null
+++ b/extras/thin-arbiter/setup-thin-arbiter.sh
@@ -0,0 +1,68 @@
+#! /bin/bash
+
+volloc="/var/lib/glusterd/thin-arbiter"
+mkdir -p $volloc
+
+cp -f extras/thin-arbiter/thin-arbiter.vol $volloc/thin-arbiter.vol
+tafile="$volloc/thin-arbiter.vol"
+
+volfile_set_brick_path () {
+    while read -r line
+    do
+        dir=`echo "$line" | cut -d' ' -f 2`
+        if [ "$dir" = "directory" ]
+        then
+            bpath=`echo "$line" | cut -d' ' -f 3`
+            sed -i -- 's?'$bpath'?'$1'?g' $tafile
+            return
+        fi
+    done < $tafile
+}
+
+tapath="/mnt/thin-arbiter"
+echo "Volume file to be used to start thin-arbiter process is :"
+echo "$tafile"
+echo " "
+echo "Default thin-arbiter path is : $tapath"
+echo -n "Do you want to change path for thin arbiter volumes. (y/N): "
+echo " "
+read moveon
+
+if [ "${moveon}" = 'N' ] || [ "${moveon}" = 'n' ]; then
+	echo "Default brick path, $tapath, has been set"
+    echo "for all thin arbiter volumes using this node"
+    echo " "
+else
+	echo -n "Enter brick path for thin arbiter volumes: "
+	read tapath
+	echo "Entered brick path : $tapath "
+	echo "Please note that this brick path will be used for ALL"
+    echo "VOLUMES using this node to host thin-arbiter brick"
+    echo " "
+fi
+
+mkdir -p $tapath/.glusterfs/indices
+volfile_set_brick_path "$tapath"
+
+echo "Directory path to be used for thin-arbiter volume is: $tapath"
+echo " "
+
+echo "========================================================"
+
+echo "Installing and starting service for thin-arbiter process"
+
+cp extras/thin-arbiter/gluster-ta-volume.service /etc/systemd/system/
+
+chmod 0777 /etc/systemd/system/gluster-ta-volume.service
+
+systemctl daemon-reload
+systemctl enable gluster-ta-volume
+systemctl stop gluster-ta-volume
+systemctl start gluster-ta-volume
+
+if [ $? == 0 ]
+then
+    echo "thin-arbiter process is setup and running"
+else
+    echo "Failed to setup thin arbiter"
+fi
diff --git a/extras/thin-arbiter/thin-arbiter.vol b/extras/thin-arbiter/thin-arbiter.vol
new file mode 100644
index 00000000000..7a60f179891
--- /dev/null
+++ b/extras/thin-arbiter/thin-arbiter.vol
@@ -0,0 +1,57 @@
+volume ta-posix
+    type storage/posix
+    option directory /mnt/thin-arbiter
+end-volume
+
+volume ta-thin-arbiter
+    type features/thin-arbiter
+    subvolumes ta-posix
+end-volume
+
+volume ta-locks
+    type features/locks
+    subvolumes ta-thin-arbiter
+end-volume
+
+volume ta-upcall
+    type features/upcall
+    option cache-invalidation off
+    subvolumes ta-locks
+end-volume
+
+volume ta-io-threads
+    type performance/io-threads
+    subvolumes ta-upcall
+end-volume
+
+volume ta-index
+    type features/index
+    option xattrop-pending-watchlist trusted.afr.ta-
+    option xattrop-dirty-watchlist trusted.afr.dirty
+    option index-base /mnt/thin-arbiter/.glusterfs/indices
+    subvolumes ta-io-threads
+end-volume
+
+volume ta-io-stats
+    type debug/io-stats
+    option count-fop-hits off
+    option latency-measurement off
+    option log-level WARNING
+    option unique-id /mnt/thin-arbiter
+    subvolumes ta-index
+end-volume
+
+volume ta-server
+    type protocol/server
+    option transport.listen-backlog 10
+    option transport.socket.keepalive-count 9
+    option transport.socket.keepalive-interval 2
+    option transport.socket.keepalive-time 20
+    option transport.tcp-user-timeout 0
+    option transport.socket.keepalive 1
+    option auth.addr./mnt/thin-arbiter.allow *
+    option auth-path /mnt/thin-arbiter
+    option transport.address-family inet
+    option transport-type tcp
+    subvolumes ta-io-stats
+end-volume