Hi,
On Wed, Nov 23, 2011 at 08:52:43AM +1100, Andrew Beekhof wrote:
> On Wed, Nov 23, 2011 at 4:05 AM, Dejan Muhamedagic <[email protected]>
> wrote:
> > On Tue, Nov 22, 2011 at 04:44:50PM +0100, [email protected] wrote:
> >> Hi again,
> >>
> >> that's strange because I did tests around this parameter
> >> LRMD_MAX_CHILDREN,
> >> with 24 Dummy resources, therefore resources which do quite nothing and so
> >> Pacemaker
> >> should start all resources at quite the same time one after the other.
> >> Then monitor op
> >> should also be quite at the same time one after the other.
> >> First, I test with no LRMD_MAX_CHILDREN in /etc/sysconfig/pacemaker so
> >> default value
> >> which is probably 4 as you told me, then I set it to 2, restart Pacemaker
> >> and did same test,
> >> and finally set it to 24 (just for a school case) and did the same test .
> >> And the result is the same for the three tests :
> >> when all the 24 Dummy resources are started , as you can see below,
> >> the op monitor seems to be gathered by 4, whatever is the
> >> LRMD_MAX_CHILDREN value,
> >> whereas my understanding was the monitor operations should have been
> >> parallelized for
> >> almost the 24 resources as the monitor takes a very short while to be
> >> completed ...
> >
> >> Where am I wrong ?
> >
> > It could be that the init script on your platform doesn't
> > support this parameter. You should talk to your vendor.
>
> Init script? Doesn't the lrmd just look for that variable in its environment?
No, it doesn't. lrmadmin has to be used to set the parameter:
lrmadmin -p max-children $LRMD_MAX_CHILDREN
Thanks,
Dejan
P.S. Attached suse openais init script.
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> See also: http://linux-ha.org/ReportingProblems
#!/bin/bash
#
# Corosync daemon init script for LSB-compliant Linux distributions.
#
# openais Start the openais (corosync) cluster service
#
# chkconfig: - 20 20
# processname: corosync
# pidfile: /var/run/corosync.pid
# description: Corosync/OpenAIS
### BEGIN INIT INFO
# Description: Manages the openais cluster services.
#
# Short-Description: openais cluster services.
# Provides: openais
# Required-Start: $network
# Should-Start: $syslog sshd drbd $named $remote_fs logd xendomains xend iscsi
libvirtd
# Required-Stop: $network
# Default-Start: 3 5
# Default-Stop: 0 6
# Should-Stop: $syslog sshd drbd $named $remote_fs logd xendomains xend iscsi
libvirtd
### END INIT INFO
do_force=0
prog="corosync"
exec="/usr/sbin/corosync"
lockfile="/var/lock/subsys/$prog"
OPENAIS_SYSCONFIG=/etc/sysconfig/openais
if [ -f $OPENAIS_SYSCONFIG ]; then
. $OPENAIS_SYSCONFIG
fi
PACEMAKER_SYSCONFIG=/etc/sysconfig/pacemaker
if [ -f $PACEMAKER_SYSCONFIG ]; then
. $PACEMAKER_SYSCONFIG
fi
LRMADMIN="/usr/sbin/lrmadmin"
SBD_CONFIG=/etc/sysconfig/sbd
SBD_BIN="/usr/sbin/sbd"
if [ -f $SBD_CONFIG ]; then
. $SBD_CONFIG
fi
[ -x "$exec" ] || exit 0
SBD_DEVS=${SBD_DEVICE%;}
SBD_DEVICE=${SBD_DEVS//;/ -d }
StartSBD() {
test -x $SBD_BIN || return
if [ -n "$SBD_DEVICE" ]; then
if ! pidofproc $SBD_BIN >/dev/null 2>&1 ; then
echo -n "Starting SBD - "
if ! $SBD_BIN -d $SBD_DEVICE -D $SBD_OPTS watch ; then
echo "SBD failed to start; aborting."
exit 1
fi
fi
fi
}
StopSBD() {
test -x $SBD_BIN || return
if [ -n "$SBD_DEVICE" ]; then
echo -n "Stopping SBD - "
if ! $SBD_BIN -d $SBD_DEVICE -D $SBD_OPTS message LOCAL exit ;
then
echo "SBD failed to stop; aborting."
exit 1
fi
fi
while pidofproc $SBD_BIN >/dev/null 2>&1 ; do
sleep 1
done
echo -n "done "
}
wait_for_lrmd() {
local maxwait=30
local i=0
while [ $i -lt $maxwait ]; do
$LRMADMIN -C > /dev/null 2>&1 &&
break
sleep 1
i=$(($i+1))
done
if [ $i -lt $maxwait ]; then
return 0
else
echo "lrmd apparently didn't start"
return 1
fi
}
set_lrmd_options() {
test -x $LRMADMIN || return
if [ -n "$LRMD_MAX_CHILDREN" ]; then
wait_for_lrmd || return
$LRMADMIN -p max-children $LRMD_MAX_CHILDREN
fi
}
internal_status() {
checkproc $exec > /dev/null 2>&1
return $?
}
status() {
if internal_status; then
echo "Running"
return 0
else
echo "Stopped"
return 7
fi
}
start() {
export COROSYNC_DEFAULT_CONFIG_IFACE
:
${COROSYNC_DEFAULT_CONFIG_IFACE="openaisserviceenableexperimental:corosync_parser"}
echo -n $"Starting OpenAIS/Corosync daemon ($prog): "
if ! internal_status; then
StartSBD
echo -n "starting... "
startproc $exec
fi
sleep 2 # give it time to fail... $? isn't definitive
if internal_status; then
set_lrmd_options
echo "OK"
touch "$lockfile"
return 0
fi
echo "Failed"
return 1
}
do_force=0
do_forever=1
stop() {
local waitcount=0
local iter=0
local stopsbd=1
local sig=TERM
echo -n $"Stopping OpenAIS/corosync daemon ($prog): "
while internal_status; do
if [ $waitcount -eq 0 ]; then
c_pid="`pidofproc $exec`"
if [ $iter -gt 0 ]; then
if [ $do_force = 1 ]; then
echo -n " Escalating... "
sig=KILL
# Do not stop SBD if we forcibly killed corosync; other
# nodes may still have a legitimate desire to STONITH us.
stopsbd=0
fi
if [ $do_forever = 0 ]; then
echo "Failed"
return 1
fi
fi
# Start a new cycle:
kill -$sig $c_pid
waitcount=0
iter=$[iter+1]
fi
waitcount=$[waitcount+1]
echo -n "."
sleep 2
done
if [ $stopsbd = 1 ]; then
StopSBD
fi
rm -f "$lockfile"
echo "OK"
return 0
}
restart() {
stop
start
}
case "$1" in
start|stop|restart)
$1
;;
force-stop)
do_force=1
stop
;;
reload|force-reload)
restart
;;
condrestart|try-restart)
[ ! -f "$lockfile" ] || restart
;;
status)
status $prog
;;
*)
echo $"Usage: $0
{start|stop|restart|try-restart|condrestart|reload|force-reload|force-stop|status}"
exit 2
esac
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See also: http://linux-ha.org/ReportingProblems
