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#!/bin/bash
# Copyright (c) 2018-2019 Red Hat, Inc. <http://www.redhat.com>
# This file is part of GlusterFS.
#
# This file is licensed to you under your choice of the GNU Lesser
# General Public License, version 3 or any later version (LGPLv3 or
# later), or the GNU General Public License, version 2 (GPLv2), in all
# cases as published by the Free Software Foundation.
# This tool has been developed to setup thin-arbiter process on a node.
# Seting up a thin arbiter process involves following files -
# 1 - thin-arbiter.vol
# Thin-arbiter (TA) process will use the graph in this file to load the
# required translators.
# 2 - gluster-ta-volume.service (generated by gluster-ta-volume.service.in)
# TA process would be running as systemd service.
#
# TA process uses a location to save TA id files for every subvolume.
# This location can be taken as input from user. Once provided and the
# TA process is started on a node, it can not be changed using this
# script or by any other mean. The same location should be used in
# the gluster CLI when creating thin-arbiter volumes.
MYPATH=`dirname $0`
volloc="/var/lib/glusterd/thin-arbiter"
mkdir -p $volloc
if [ -f /etc/glusterfs/thin-arbiter.vol ]; then
volfile=/etc/glusterfs/thin-arbiter.vol
else
volfile=$MYPATH/thin-arbiter.vol
fi
tafile="$volloc/thin-arbiter.vol"
help () {
echo " "
echo ' This tool helps to setup thin-arbiter (TA) process on a node.
TA process uses a location to save TA id files for every subvolume.
This location can be taken as input from user. Once provided and the
TA process is started on a node, it can not be changed using this script
or by any other mean. The same location should be used in gluster CLI
when creating thin-arbiter volumes.
usage: setup-thin-arbiter.sh [-s] [-h]
options:
-s - Setup thin-arbiter file path and start process
-h - Show this help message and exit
'
}
volfile_set_brick_path () {
while read -r line
do
dir=`echo "$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 < $tafile
}
check_ta_proc () {
pro=`ps aux | grep thin-arbiter.vol | grep "volfile-id"`
if [ "${pro}" = '' ]; then
echo ""
else
curr_loc=`cat $volloc/thin-arbiter.vol | grep option | grep directory`
loc=`echo "${curr_loc##* }"`
echo "******************************************************"
echo "Error:"
echo "Thin-arbiter process is running with thin-arbiter path = $loc"
echo "Can not change TA path on this host now."
echo "$pro"
echo "******************************************************"
exit 1
fi
}
getpath () {
check_ta_proc
echo "******************************************************"
echo "User will be required to enter a path/folder for arbiter volume."
echo "Please note that this path will be used for ALL VOLUMES using this"
echo "node to host thin-arbiter. After setting, if a volume"
echo "has been created using this host and path then path for"
echo "thin-arbiter can not be changed "
echo "******************************************************"
echo " "
while true;
do
echo -n "Enter brick path for thin arbiter volumes: "
echo " "
read tapath
if [ "${tapath}" = '' ]; then
echo "Please enter valid path"
continue
else
echo "Entered brick path : $tapath "
echo "Please note that this brick path will be used for ALL"
echo "VOLUMES using this node to host thin-arbiter brick"
echo -n "Want to continue? (y/N): "
echo " "
read cont
if [ "${cont}" = 'N' ] || [ "${cont}" = 'n' ]; then
exit 0
else
break
fi
fi
done
}
setup () {
getpath
mkdir -p $tapath/.glusterfs/indices
if [ -d $tapath/.glusterfs/indices ]; then
echo " "
else
echo "Could not create $tapath/.glusterfs/indices directory, check provided ta path."
exit 1
fi
cp -f --backup --suffix=_old $volfile $volloc/thin-arbiter.vol
volfile_set_brick_path "$tapath"
echo "Directory path to be used for thin-arbiter volume is: $tapath"
echo " "
echo "========================================================"
if [ -f /usr/lib/systemd/system/gluster-ta-volume.service ]; then
echo "Starting thin-arbiter process"
else
cp $MYPATH/../systemd/gluster-ta-volume.service /etc/systemd/system/
echo "Starting thin-arbiter process"
chmod 0644 /etc/systemd/system/gluster-ta-volume.service
fi
systemctl daemon-reload
systemctl enable gluster-ta-volume
systemctl stop gluster-ta-volume
systemctl start gluster-ta-volume
if [ $? == 0 ]; then
echo "thin-arbiter process has been setup and running"
else
echo "Failed to setup thin arbiter"
exit 1
fi
}
main()
{
if [ "$#" -ne 1 ]; then
help
exit 0
fi
while getopts "sh" opt; do
case $opt in
h)
help
exit 0
;;
s)
setup
exit 0
;;
*)
help
exit 0
;;
esac
done
}
main "$@"
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