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#!/bin/bash
#
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# clvmd - Clustered LVM Daemon init script
#
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# chkconfig: - 24 76
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# description: Cluster daemon for userland logical volume management tools.
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#
# For Red-Hat-based distributions such as Fedora, RHEL, CentOS.
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#
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### BEGIN INIT INFO
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# Provides: clvmd
# Required-Start: $local_fs
# Required-Stop: $local_fs
# Short-Description: This service is Clusterd LVM Daemon.
# Description: Cluster daemon for userland logical volume management tools.
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### END INIT INFO
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. /etc/rc.d/init.d/functions
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DAEMON=clvmd
exec_prefix=@exec_prefix@
sbindir=@sbindir@
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lvm_vgchange=${sbindir}/vgchange
lvm_vgdisplay=${sbindir}/vgdisplay
lvm_vgscan=${sbindir}/vgscan
lvm_lvs=${sbindir}/lvs
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CLVMDOPTS="-T30"
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[ -f /etc/sysconfig/cluster ] && . /etc/sysconfig/cluster
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[ -f /etc/sysconfig/$DAEMON ] && . /etc/sysconfig/$DAEMON
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[ -n "$CLVMD_CLUSTER_IFACE" ] && CLVMDOPTS="$CLVMDOPTS -I $CLVMD_CLUSTER_IFACE"
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# allow up to $CLVMD_STOP_TIMEOUT seconds to clvmd to complete exit operations
# default to 10 seconds
[ -z $CLMVD_STOP_TIMEOUT ] && CLVMD_STOP_TIMEOUT=10
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LOCK_FILE="/var/lock/subsys/$DAEMON"
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# NOTE: replace this with vgs, once display filter per attr is implemented.
clustered_vgs() {
${lvm_vgdisplay} 2>/dev/null | \
awk 'BEGIN {RS="VG Name"} {if (/Clustered/) print $1;}'
}
clustered_lvs() {
for i in $(clustered_vgs); do
${lvm_lvs} -o lv_name --noheadings $i
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done
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}
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rh_status() {
status $DAEMON
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}
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rh_status_q() {
rh_status >/dev/null 2>&1
}
start()
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{
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if ! rh_status_q; then
echo -n "Starting $DAEMON: "
daemon $DAEMON $CLVMDOPTS || return $?
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echo
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fi
# Refresh local cache.
#
# It's possible that new PVs were added to this, or other VGs
# while this node was down. So we run vgscan here to avoid
# any potential "Missing UUID" messages with subsequent
# LVM commands.
# The following step would be better and more informative to the user:
# 'action "Refreshing VG(s) local cache:" ${lvm_vgscan}'
# but it could show warnings such as:
# 'clvmd not running on node x-y-z Unable to obtain global lock.'
# and the action would be shown as FAILED when in reality it didn't.
# Ideally vgscan should have a startup mode that would not print
# unnecessary warnings.
${lvm_vgscan} > /dev/null 2>&1
action "Activating VG(s):" ${lvm_vgchange} -ayl $LVM_VGS || return $?
touch $LOCK_FILE
return 0
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}
wait_for_finish()
{
count=0
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while [ "$count" -le "$CLVMD_STOP_TIMEOUT" ] && \
rh_status_q ]; do
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sleep 1
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count=$((count+1))
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done
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! rh_status_q
}
stop()
{
rh_status_q || return 0
action "Deactivating clusterd VG(s):" ${lvm_vgchange} -anl ${LVM_VGS:-$(clustered_vgs)} || return $?
action "Signaling $DAEMON to exit" kill -TERM $(pidofproc $DAEMON) || return $?
# wait half second before we start the waiting loop or we will show
# the loop more time than really necessary
usleep 500000
# clvmd could take some time to stop
rh_status_q && action "Waiting for $DAEMON to exit:" wait_for_finish
if rh_status_q; then
echo -n "$DAEMON failed to exit"
failure
echo
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return 1
else
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echo -n "$DAEMON terminated"
success
echo
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fi
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rm -f $LOCK_FILE
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return 0
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}
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reload() {
rh_status_q || exit 7
action "Reloading $DAEMON configuration: " $DAEMON -R || return $?
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}
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restart() {
# if stop fails, restart will return the error and not attempt
# another start. Even if start is protected by rh_status_q,
# that would avoid spawning another daemon, it would try to
# reactivate the VGs.
stop && start
}
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# See how we were called.
case "$1" in
start)
start
rtrn=$?
;;
stop)
stop
rtrn=$?
;;
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restart|force-reload)
restart
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rtrn=$?
;;
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condrestart|try-restart)
rh_status_q || exit 0
restart
rtrn=$?
;;
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reload)
reload
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rtrn=$?
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;;
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status)
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rh_status
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rtrn=$?
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if [ $rtrn = 0 ]; then
cvgs="$(clustered_vgs)"
echo Active clustered Volume Groups: ${cvgs:-"(none)"}
clvs="$(clustered_lvs)"
echo Active clustered Logical Volumes: ${clvs:-"(none)"}
fi
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;;
*)
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echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
rtrn=2
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;;
esac
exit $rtrn