mirror of
https://gitlab.alpinelinux.org/alpine/aports.git
synced 2025-08-27 01:11:33 +02:00
121 lines
2.7 KiB
Plaintext
121 lines
2.7 KiB
Plaintext
#!/sbin/openrc-run
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#
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# Control Groups Configuration Startup
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#
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# This script runs the cgconfigparser utility to parse and setup
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# the control group filesystem. It uses ${CONFIG_FILE}
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# and parses the configuration specified in there.
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#
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CGCONFIGPARSER="/usr/sbin/cgconfigparser"
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CGROUP_FS="cgroup"
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CONFIG_FILE=${CONFIG_FILE:-"/etc/cgconfig.conf"}
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MOUNTS_FILE="/proc/mounts"
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RULES_FILE="/etc/cgrules.conf"
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# Support multiple mount points
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MOUNT_POINTS=
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move_all_to_init_class() {
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local i
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for i in $MOUNT_POINTS; do
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local mount_point=${i%:*}
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cd ${mount_point}
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if grep -qw "${mount_point}" ${MOUNTS_FILE}; then
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local directory
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for directory in $(find . -depth -type d); do
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if [ "${directory}" != "." ]; then
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# cat fails with "Argument list too long" error
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sed -nu p < ${directory}/tasks > tasks
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rmdir ${directory}
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fi
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done
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else
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ewarn "Resource control filesystem not mounted"
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fi
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cd - >/dev/null
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done
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}
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parse_mounts() {
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local device mount_point fs_type options other
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while read device mount_point fs_type options other; do
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if echo ${CGROUP_FS} | grep -q ${device}; then
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MOUNT_POINTS="${MOUNT_POINTS} ${mount_point}:${options}"
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fi
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done < ${MOUNTS_FILE}
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}
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umount_fs() {
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local i
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for i in ${MOUNT_POINTS}; do
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umount ${i%:*}
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rmdir ${i%:*}
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done
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}
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depend() {
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need local
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}
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start() {
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ebegin "Starting cgconfig service"
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# Mount filesystem and create cgroups
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if ! ${CGCONFIGPARSER} -l ${CONFIG_FILE} >/dev/null; then
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eend 1 "Failed to parse ${CONFIG_FILE}"
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return 1
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fi
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parse_mounts
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# Find default cgroup name in rules file
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local default_cgroup
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if [ -f "${RULES_FILE}" ]; then
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default_cgroup=$(awk '$1 == "*" {print $3; exit}' ${RULES_FILE})
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if [ $default_cgroup == "*" ]; then
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ewarn "${RULES_FILE} incorrect"
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ewarn "Overriding it"
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default_cgroup=
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fi
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fi
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# Use predefined name if none was found
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if [ -z "${default_cgroup}" ]; then
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default_cgroup=sysdefault
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fi
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# Create a default cgroup for tasks to return back to
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local i
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for i in $MOUNT_POINTS; do
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local mount_point=${i%:*}
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local mount_options=${i#*:}
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# Ignore if directory already exists
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mkdir -p ${mount_point}/${default_cgroup}
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find ${mount_point}/ -name tasks | xargs chmod a+rw
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chmod go-w ${mount_point}/tasks
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# Special rule for cpusets
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if echo ${mount_options} | grep -qw cpuset; then
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cat ${mount_point}/cpuset.cpus > ${mount_point}/${default_cgroup}/cpuset.cpus
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cat ${mount_point}/cpuset.mems > ${mount_point}/${default_cgroup}/cpuset.mems
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fi
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# Classify everything to default cgroup
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local j
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for j in $(ps --no-headers -eL o tid); do
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echo $j > ${mount_point}/${default_cgroup}/tasks 2>/dev/null
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done
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done
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eend 0
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}
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stop() {
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ebegin "Stopping cgconfig service"
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parse_mounts
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move_all_to_init_class
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umount_fs
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eend 0
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}
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