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#! /bin/bash
# RHS-2.0 only
# - The script mounts the 'meta-vol' on start 'event' on a known
# directory (eg. /gluster/lock)
# - Adds the necessary configuration changes for ctdb in smb.conf and
# restarts smb service.
# - P.S: There are other 'tasks' that need to be done outside this script
# to get CTDB based failover up and running.
SMB_CONF=/etc/samba/smb.conf
CTDB_MNT=/gluster/lock
PING_TIMEOUT_SECS=10
PROGNAME="ctdb"
OPTSPEC="volname:"
VOL=
# $META is the volume that will be used by CTDB as a shared filesystem.
# It is not desirable to use this volume for storing 'data' as well.
# META is set to 'all' (viz. a keyword and hence not a legal volume name)
# to prevent the script from running for volumes it was not intended.
# User needs to set META to the volume that serves CTDB lockfile.
META="all"
function parse_args () {
ARGS=$(getopt -l $OPTSPEC -name $PROGNAME $@)
eval set -- "$ARGS"
while true; do
case $1 in
--volname)
shift
VOL=$1
;;
*)
shift
break
;;
esac
shift
done
}
function add_glusterfs_ctdb_options () {
PAT="Share Definitions"
GLUSTER_CTDB_CONFIG="# ctdb config for glusterfs\n\tclustering = yes\n\tidmap backend = tdb2\n"
exists=`grep "clustering = yes" "$SMB_CONF"`
if [ "$exists" == "" ]
then
sed -i /"$PAT"/i\ "$GLUSTER_CTDB_CONFIG" "$SMB_CONF"
fi
}
function add_fstab_entry () {
volname=$1
mntpt=$2
mntent="`hostname`:/$volname $mntpt glusterfs _netdev,defaults,transport=tcp 0 0"
exists=`grep "^$mntent" /etc/fstab`
if [ "$exists" == "" ]
then
echo "$mntent" >> /etc/fstab
fi
}
function add_ping_timeout () {
volname=$1
value=$2
gluster volume set $volname network.ping-timeout $value
}
parse_args $@
if [ "$META" = "$VOL" ]
then
#expects ctdb service to manage smb
service smb stop
add_glusterfs_ctdb_options
mkdir -p $CTDB_MNT
sleep 5
# Make sure ping-timeout is not default for CTDB volume
add_ping_timeout $VOL $PING_TIMEOUT_SECS;
mount -t glusterfs `hostname`:$VOL "$CTDB_MNT" && \
add_fstab_entry $VOL $CTDB_MNT
chkconfig ctdb on
fi
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