--- /dev/null
+initscripts - Initialization scripts; they are used to initialize the workload
+management system. The script consists of two major components
+
+Configuration files
+-------------------
+
+The main configuraiton file /etc/wlm.conf. This file has a format
+
+mount <mountpoint> <list of controllers>
+<controller> <controller configuration file>
+
+A sample configuration file is included below
+
+#
+# controller file
+#
+mount /container cpu
+cpu /etc/wlm/cpu.conf
+
+NOTE: Any line beginning with '#' is ignored as comments. The sample
+configuration above, mounts the cpu controller at mount point /container.
+It then parses /etc/wlm/cpu.conf as the configuration file for the
+cpu controller.
+
+The controller configuration file is of the format
+
+<name of the class> <options>
+
+In the case of the CPU controller a sample configuration would look
+like
+
+class1 cpu.shares=1024
+class2 cpu.shares=512
+
+The configuration below creates two classes class1 and class2 and
+assigns shares of 1024 to class1 and 512 to class1.
+
+Intialization script
+--------------------
+
+The initialization script is installed in /etc/init.d, it is called
+"wlm". Depending on the run-level, it is installed in the appropriate
+/etc/rc.d/rc<N>.d. The script comes with two options
+
+a. start
+
+start, starts the workload management, parses the configuration file.
+If required creates the mount point directory and then mounts the
+cgroup filesystem with the controllers specified.
+
+b. stop
+
+stops workload management, moves all tasks from various groups to
+the root class. It then removes all other classes and then unmounts
+the workload management system.
+
+Assumptions
+-----------
+
+1. The kernel is compiled in with the correct options to support
+ cgroups and the CPU controller.
+2. This version has been tested with 2.6.24-rc1 only.
--- /dev/null
+#
+# 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.
+#
+#
+# TODO: Make this code more robust, add error checking and recovery
+# for invalid configuration or interrupted execution
+#
+# Make the script LSB compliant
+#
+
+CONF_FILE=/etc/wlm.conf
+PROC_CGROUPS_FILE=/proc/cgroups
+CGROUP_FS=cgroup
+MOUNT_POINT=/dev/container
+#MOUNT_OPTS=cpu
+IGNORE_OPTS="ns cpuset"
+
+parse_controller_file() {
+ ctlr=$1
+ file=$2
+ tuid="root"
+ tgid="root"
+ cuid="root"
+ cgid="root"
+
+ pushd $PWD 2>&1 > /dev/null
+ while read name opts
+ do
+ case $name in
+ 'mount')
+ ;;
+ *)
+ echo "Creating class $name"
+ class=$name
+ mkdir -p $MOUNTPOINT/$class
+ cd $MOUNTPOINT/$class
+
+ if echo $opts | grep -q "="
+ then
+ for single_opt in $opts
+ do
+ cf=`echo $single_opt | cut -d '=' -f1`
+ co=`echo $single_opt | cut -d '=' -f2`
+ case $cf in
+ "tuid")
+ tuid=$co
+ ;;
+ "cuid")
+ cuid=$co
+ ;;
+ "tgid")
+ tgid=$co
+ ;;
+ "cgid")
+ cgid=$co
+ ;;
+ *)
+ echo -n $co > $cf
+ ;;
+ esac
+ done
+ chown -R $cuid:$cgid $MOUNTPOINT/$class
+ chown -R $tuid:$tgid $MOUNTPOINT/$class/tasks
+ fi
+ esac
+ done < $file
+ popd 2>&1 > /dev/null
+}
+
+parse_controller_opts() {
+ name=$1;
+ file=$2;
+
+ if [ ! -r $PROC_CGROUPS_FILE ]
+ then
+ echo "$PROC_CGROUPS_FILE does not exist, please compile"
+ echo "cgroups into the kernel"
+ exit 1
+ else
+ line=`grep -w $name $PROC_CGROUPS_FILE`
+ if [ $? -ne 0 ]
+ then
+ echo "$name controller not enabled"
+ exit 1
+ fi
+
+ active=`echo $line | awk '{print $2}'`
+ if [[ $active -eq 0 ]]
+ then
+ echo "$name controller not mounted"
+ else
+ parse_controller_file $name $file
+ fi
+ fi
+}
+
+parse_conf_file() {
+ while read name conf
+ do
+ # skip all comments
+ if ! echo $name | grep -q ^#
+ then
+ case $name in
+ 'mount')
+ MOUNTPOINT=`echo $conf | cut -d ' ' -f1`;
+ MOUNTOPTS=`echo $conf | cut -d ' ' -f2`;
+ ;;
+ esac
+ fi
+ done < $CONF_FILE
+
+ return 0;
+}
+
+mount_fs() {
+ if [ ! -r $PROC_CGROUPS_FILE ]
+ then
+ echo "$PROC_CGROUPS_FILE does not exist, please compile"
+ echo "cgroups into the kernel"
+ exit 1
+ else
+ while read name hierarchy num_cgroups
+ do
+ if ! echo $name | grep -q ^#
+ then
+ echo $IGNORE_OPTS | grep -wq $name
+ if [[ $? -ne 0 ]]
+ then
+ MOUNT_OPTS=$name","$MOUNT_OPTS
+ fi
+ fi
+ done < $PROC_CGROUPS_FILE
+ MOUNT_OPTS=${MOUNT_OPTS%%","}
+ #line=`grep -w $MOUNT_OPTS $PROC_CGROUPS_FILE`
+ #if [ $? -ne 0 ]
+ #then
+ # echo "$name controller not enabled"
+ # exit 1
+ #fi
+ fi
+ mkdir -p $MOUNTPOINT
+ mount -t $CGROUP_FS $CGROUP_FS -o $MOUNT_OPTS $MOUNTPOINT
+ #
+ # Give root tasks read/write permission to all, since tasks
+ # tasks will be moved to root frequently
+ #
+ chmod ago+rwx $MOUNTPOINT/tasks
+ chmod ago+rwx $MOUNTPOINT
+ chmod +t $MOUNTPOINT
+ return $?
+}
+
+umount_fs() {
+ umount $MOUNTPOINT
+ rmdir $MOUNTPOINT
+}
+
+create_classes() {
+ while read name conf
+ do
+ # skip all comments
+ if ! echo $name | grep -q ^#
+ then
+ case $name in
+ 'mount')
+ ;;
+ *)
+ parse_controller_opts $name $conf
+ esac
+ fi
+
+ done < $CONF_FILE
+}
+
+start() {
+ echo "Starting wlm service: "
+ mount_fs
+ if [ $? -eq 0 ]
+ then
+ create_classes
+ fi
+ [ $? == 0 ] && touch /var/lock/subsys/wlm
+ return $?
+}
+
+move_all_to_init_class() {
+ cd $MOUNTPOINT
+ cat /proc/mounts | grep -w $MOUNTPOINT
+ if [ $? -ne 0 ]
+ then
+ echo "resource control filesystem not mounted"
+ exit 1
+ fi
+
+ for i in `find . -type d`
+ do
+ case $i in
+ '.')
+ ;;
+ *)
+ class=${i#./*}
+ echo "Removing class $class"
+ sed -nu p < ./$i/tasks > tasks
+ rmdir $i
+ ;;
+ esac
+ done
+ cd - > /dev/null
+}
+
+
+stop() {
+ move_all_to_init_class
+ umount_fs
+}
+
+trapped() {
+ #
+ # Do nothing
+ #
+ true
+}
+
+#
+# main script work done here
+#
+trap "trapped ABRT" ABRT
+trap "trapped QUIT" QUIT
+trap "trapped TERM" TERM
+trap "trapped INT" INT
+
+parse_conf_file
+
+case $1 in
+ 'start')
+ start;
+ ;;
+ 'stop')
+ stop;
+ ;;
+esac
+
projects / thirdparty / libcgroup.git / commitdiff
