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|
#!/bin/bash
#
# clvmd - Clustered LVM Daemon init script
#
# chkconfig: - 24 76
# description: Cluster daemon for userland logical volume management tools.
#
# For Red-Hat-based distributions such as Fedora, RHEL, CentOS.
#
### BEGIN INIT INFO
# Provides: clvmd
# Required-Start: $local_fs@CLVMD_CMANAGERS@
# Required-Stop: $local_fs@CLVMD_CMANAGERS@
# Short-Description: This service is Clusterd LVM Daemon.
# Description: Cluster daemon for userland logical volume management tools.
### END INIT INFO
. /etc/rc.d/init.d/functions
DAEMON=clvmd
exec_prefix=@exec_prefix@
sbindir=@sbindir@
lvm_vgchange=${sbindir}/vgchange
lvm_vgdisplay=${sbindir}/vgdisplay
lvm_vgscan=${sbindir}/vgscan
lvm_lvdisplay=${sbindir}/lvdisplay
CLVMDOPTS="-T30"
[ -f /etc/sysconfig/cluster ] && . /etc/sysconfig/cluster
[ -f /etc/sysconfig/$DAEMON ] && . /etc/sysconfig/$DAEMON
[ -n "$CLVMD_CLUSTER_IFACE" ] && CLVMDOPTS="$CLVMDOPTS -I $CLVMD_CLUSTER_IFACE"
# allow up to $CLVMD_STOP_TIMEOUT seconds to clvmd to complete exit operations
# default to 10 seconds
[ -z $CLMVD_STOP_TIMEOUT ] && CLVMD_STOP_TIMEOUT=10
LOCK_FILE="/var/lock/subsys/$DAEMON"
# 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_active_lvs() {
for i in $(clustered_vgs); do
${lvm_lvdisplay} $i 2>/dev/null | \
awk 'BEGIN {RS="LV Name"} {if (/[^N^O^T] available/) print $1;}'
done
}
rh_status() {
status $DAEMON
}
rh_status_q() {
rh_status >/dev/null 2>&1
}
start()
{
if ! rh_status_q; then
echo -n "Starting $DAEMON: "
$DAEMON $CLVMDOPTS || return $?
echo
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} -aay $LVM_VGS || return $?
touch $LOCK_FILE
return 0
}
wait_for_finish()
{
count=0
while [ "$count" -le "$CLVMD_STOP_TIMEOUT" ] && \
rh_status_q ]; do
sleep 1
count=$((count+1))
done
! rh_status_q
}
stop()
{
rh_status_q || return 0
[ -z "$LVM_VGS" ] && LVM_VGS="$(clustered_vgs)"
if [ -n "$LVM_VGS" ]; then
action "Deactivating clustered VG(s):" ${lvm_vgchange} -anl $LVM_VGS || return $?
fi
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
return 1
else
echo -n "$DAEMON terminated"
success
echo
fi
rm -f $LOCK_FILE
return 0
}
reload() {
rh_status_q || exit 7
action "Reloading $DAEMON configuration: " $DAEMON -R || return $?
}
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.
# Try to get clvmd to restart itself. This will preserve
# exclusive LV locks
action "Restarting $DAEMON: " $DAEMON -S
# If that fails then do a normal stop & restart
if [ $? != 0 ]; then
stop && start
return $?
else
touch $LOCK_FILE
return 0
fi
}
[ "$EUID" != "0" ] && {
echo "clvmd init script can only be executed as root user"
exit 4
}
# See how we were called.
case "$1" in
start)
start
rtrn=$?
;;
stop)
stop
rtrn=$?
;;
restart|force-reload)
restart
rtrn=$?
;;
condrestart|try-restart)
rh_status_q || exit 0
restart
rtrn=$?
;;
reload)
reload
rtrn=$?
;;
status)
rh_status
rtrn=$?
if [ $rtrn = 0 ]; then
cvgs="$(clustered_vgs)"
echo Clustered Volume Groups: ${cvgs:-"(none)"}
clvs="$(clustered_active_lvs)"
echo Active clustered Logical Volumes: ${clvs:-"(none)"}
fi
;;
*)
echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
rtrn=2
;;
esac
exit $rtrn
|
