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#!/bin/bash
#
# Start/Stop the workload manager
#
# Copyright IBM Corporation. 2008
#
# Authors: Balbir Singh <balbir@linux.vnet.ibm.com>
# This program is free software; you can redistribute it and/or modify it
# under the terms of version 2.1 of the GNU Lesser General Public License
# as published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# cgconfig Control Groups Configuration Startup
# chkconfig: 2345 80 20
# description: This script runs the cgconfigparser utility to parse and setup
# the control group filesystem. It uses /etc/cgconfig.conf
# and parses the configuration specified in there.
### BEGIN INIT INFO
# Provides: cgconfig
# Required-Start: $local_fs $syslog $time
# Required-Stop: $local_fs $syslog
# Should-Start:
# Should-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: start and stop the WLM configuration
# Description: This script allows us to create a default configuration
### END INIT INFO
PATH=/bin:/usr/bin:/sbin:/usr/sbin:.
MOUNTS_FILE=/proc/mounts
PROC_CGROUPS_FILE=/proc/cgroups
CGROUP_FS=cgroup
CONFIG_FILE=/etc/cgconfig.conf
# support multiple mount points
declare -a MOUNTPOINT
declare -a MOUNTOPTS
maxindex=0
servicename=cgconfig
#
# Source LSB routines
#
. /lib/lsb/init-functions
parse_mounts() {
while read name mountpt fs opts other
do
if echo $name | grep -q $CGROUP_FS
then
maxindex=$(($maxindex+1))
MOUNTPOINT[$maxindex]=$mountpt
MOUNTOPTS[$maxindex]=$opts
fi
done < $MOUNTS_FILE
return 0;
}
umount_fs() {
for i in `seq 1 $maxindex`
do
umount ${MOUNTPOINT[$i]}
rmdir ${MOUNTPOINT[$i]}
done
}
start() {
if [ -f /var/lock/subsys/$servicename ]
then
log_warning_msg "lock file already exists"
return
fi
if [ $? -eq 0 ]
then
#log_progress_msg "Starting cgconfig service: "
cgconfigparser -l $CONFIG_FILE
fi
declare defaultcgroup
if [ -f /etc/cgrules.conf ]
then
read user ctrl defaultcgroup <<< \
`grep -m1 ^\* /etc/cgrules.conf`
if [[ -n $defaultcgroup && $defaultcgroup = "*" ]]
then
log_warning_msg "/etc/cgrules.conf incorrect"
log_warning_msg "Overriding it"
defaultcgroup=
fi
fi
if [ -z $defaultcgroup ]
then
defaultcgroup=sysdefault/
fi
#
# Create a default class for tasks to return back to
#
parse_mounts
for i in `seq 1 $maxindex`
do
#
# Ignore if directory already exists
#
mkdir ${MOUNTPOINT[$i]}/$defaultcgroup 2> /dev/null
chmod a+rw ${MOUNTPOINT[$i]}/$defaultcgroup/tasks
#
# special rule for cpusets
#
echo ${MOUNTOPTS[$i]} | grep -q -w cpuset
if [ $? -eq 0 ]
then
cat ${MOUNTPOINT[$i]}/cpuset.cpus > \
${MOUNTPOINT[$i]}/$defaultcgroup/cpuset.cpus
cat ${MOUNTPOINT[$i]}/cpuset.mems > \
${MOUNTPOINT[$i]}/$defaultcgroup/cpuset.mems
fi
#
# classify everything to default cgroup
#
for j in `ps --no-headers -eL o tid`
do
echo $j > ${MOUNTPOINT[$i]}/$defaultcgroup/tasks 2>/dev/null
done
done
[ $? == 0 ] && touch /var/lock/subsys/$servicename
return $?
}
move_all_to_init_class() {
for i in `seq 1 $maxindex`
do
cd ${MOUNTPOINT[$i]}
cat /proc/mounts | grep -wq ${MOUNTPOINT[$i]}
if [ $? -ne 0 ]
then
log_failure_msg "resource control filesystem not mounted"
exit 1
fi
for i in `find . -depth -type d`
do
case $i in
'.')
;;
*)
class=${i#./*}
#log_progress_msg "Removing class $class"
sed -nu p < ./$i/tasks > tasks
rmdir $i
;;
esac
done
cd - > /dev/null
done
}
stop() {
move_all_to_init_class
umount_fs
rm -f /var/lock/subsys/$servicename
}
trapped() {
#
# Do nothing
#
true
}
usage() {
echo "$0 <start|stop|restart|condrestart|status>"
exit 1
}
common() {
#
# main script work done here
#
trap "trapped ABRT" ABRT
trap "trapped QUIT" QUIT
trap "trapped TERM" TERM
trap "trapped INT" INT
parse_mounts
}
case $1 in
'stop')
common
stop;
;;
'start')
common
start;
;;
'restart')
common
stop
start
;;
'reload')
common
stop
start
;;
'condrestart')
if [ -f /var/lock/subsys/$servicename ] ; then
stop
start
fi
;;
'status')
if [ -f /var/lock/subsys/$servicename ] ; then
echo "Running"
else
echo "Stopped"
fi
;;
*)
usage
;;
esac
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