mirror of https://github.com/schoebel/mars
contrib: add sysv init script by Daniel Hermann
This commit is contained in:
Thomas Schoebel-Theuer
parent
bb6b65a002
commit
2659864765
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#!/bin/sh
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### BEGIN INIT INFO
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# Provides: mars
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# Required-Start: $network $local_fs $remote_fs
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# Required-Stop: $remote_fs
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Short-Description: MARS module/userspace control
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# Description: This script loads/unloads the MARS kernel module
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### END INIT INFO
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# Author: Daniel Hermann <daniel.hermann@1und1.de>
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# PATH should only include /usr/* if it runs after the mountnfs.sh script
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PATH=/sbin:/usr/sbin:/bin:/usr/bin
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DESC=MARS
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NAME=mars
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MODULE=mars
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SCRIPTNAME=/etc/init.d/$NAME
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ENABLED="true"
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MODPROBE=/sbin/modprobe
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RMMOD=/sbin/rmmod
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SYSCTL=/sbin/sysctl
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MODPROBE_PARAMS="-s"
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RMMOD_PARAMS="-s"
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MOUNT_FROM_FSTAB="true"
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MARS_MOUNTPOINT="/mars"
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MOUNT_OPTIONS=""
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SYSCTL_CONFFILE=/etc/mars/sysctl.conf
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## Enable read ahead for /mars by setting following parameter in kB
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## Reasonable value: 256 (kB)
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READAHEAD_FOR_MARS_DEVICE=
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# Read configuration variable file if it is present
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[ -r /etc/default/$NAME ] && . /etc/default/$NAME
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# Load the VERBOSE setting and other rcS variables
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. /lib/init/vars.sh
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# Define LSB log_* functions.
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# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
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. /lib/lsb/init-functions
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mount_mars_from_fstab()
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{
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if [ "$MOUNT_FROM_FSTAB" = "true" ]; then
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if grep -q " $MARS_MOUNTPOINT " /proc/mounts; then
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log_progress_msg "($MARS_MOUNTPOINT already mounted)"
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return 1
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fi
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log_progress_msg "(mount $MARS_MOUNTPOINT)"
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mount $MOUNT_OPTIONS $MARS_MOUNTPOINT || return 2
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else
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# MOUNT_FROM_FSTAB is disabled and we have no
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log_progress_msg "($MARS_MOUNTPOINT not mounted)"
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# ignore this "error", /mars may be on root partition
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return 0
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fi
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}
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umount_mars()
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{
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if [ "$MOUNT_FROM_FSTAB" = "true" ]; then
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if ! grep -q " $MARS_MOUNTPOINT " /proc/mounts; then
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log_progress_msg "($MARS_MOUNTPOINT not mounted)"
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return 1
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else
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log_progress_msg "(umount $MARS_MOUNTPOINT)"
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umount $MARS_MOUNTPOINT || return 2
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fi
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fi
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}
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load_module()
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{
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if [ -r /sys/module/mars/version ]; then
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log_progress_msg "(module already loaded)"
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return 1 # already loaded
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fi
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if ! modinfo mars >/dev/null; then
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log_progress_msg "(module unavailable)"
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return 2
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fi
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log_progress_msg "(load module)"
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$MODPROBE $MODPROBE_PARAMS mars || return 2
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# Set custom kernel parameters after module is loaded
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if [ -s $SYSCTL_CONFFILE ]; then
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log_progress_msg "(sysctl $SYSCTL_CONFFILE)"
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$SYSCTL -q -p $SYSCTL_CONFFILE || return 2
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fi
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}
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unload_module()
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{
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if [ ! -r /sys/module/mars/version ]; then
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log_progress_msg "(module not loaded)"
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return 1
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fi
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log_progress_msg "(unload module)"
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$RMMOD $RMMOD_PARAMS mars || return 2
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}
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set_readahead()
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{
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local rc=0
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if [ $READAHEAD_FOR_MARS_DEVICE ]; then
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MARS_DEV_LINK=/dev/disk/by-label/mars
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if [ ! -L ${MARS_DEV_LINK} ]; then
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errmsg=" NOLABEL"
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rc=2
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else
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MARS_DEV=$( readlink -e ${MARS_DEV_LINK} )
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if [ $? -ne 0 ]; then
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errmsg=" NODEV"
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rc=2
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else
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MARS_DEV=${MARS_DEV##*/} # remove prefix
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READAHEAD_SYSFILE=/sys/block/$MARS_DEV/queue/read_ahead_kb
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if [ ! -w $READAHEAD_SYSFILE ]; then
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errmsg=" NOSYSFILE"
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rc=2
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fi
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fi
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fi
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log_progress_msg "(set readahead ${READAHEAD_FOR_MARS_DEVICE}kB for $MARS_DEV$errmsg)"
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if [ $rc -eq 0 ]; then
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echo ${READAHEAD_FOR_MARS_DEVICE} > $READAHEAD_SYSFILE
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fi
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fi
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return $rc
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}
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do_start()
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{
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mount_mars_from_fstab; rc1=$?
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case "$rc1" in
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0|1) set_readahead; rc2=$? ;;
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*) rc2=255 ;;
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esac
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case "$rc1" in # ignore failures of set_readahead
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0|1) load_module; rc3=$? ;;
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*) rc3=255 ;;
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esac
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case "$rc3" in
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0|1) return $(( rc1 * rc3 )) ;;
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*) return 2
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esac
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}
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do_stop()
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{
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if marsadm show all | grep -q actual-$(uname -n)/is-primary\=1; then
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log_progress_msg "(local node is primary for some resource)"
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return 2
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fi
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unload_module; rc1=$?
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case "$rc1" in
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0|1) umount_mars; rc2=$? ;;
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2) rc2=255 ;;
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esac
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case "$rc2" in
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0|1) return $(( rc1 * rc2 )) ;;
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*) return 2
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esac
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}
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do_status()
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{
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if [ -r /sys/module/mars/version ]; then
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MODVERS=$(cat /sys/module/mars/version)
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echo "module is loaded: $MODVERS"
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return 0 # LSB: running
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else
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echo -n "module NOT loaded, "
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if grep -q " $MARS_MOUNTPOINT " /proc/mounts; then
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echo "$MARS_MOUNTPOINT is mounted"
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else
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echo "$MARS_MOUNTPOINT NOT mounted"
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fi
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return 3 # LSB: not running
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fi
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}
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case "$1" in
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start)
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if [ "$ENABLED" = "true" ]; then
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[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC "
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do_start
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case "$?" in
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0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
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2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
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esac
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else
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log_warning_msg "$DESC not enabled in /etc/default/$NAME, not starting."
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fi
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;;
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stop)
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[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC"
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do_stop
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case "$?" in
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0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
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2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
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esac
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;;
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status)
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do_status
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exit $?
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;;
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restart|force-reload)
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if [ "$ENABLED" = "true" ]; then
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log_daemon_msg "Restarting $DESC"
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do_stop
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case "$?" in
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0|1)
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do_start
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case "$?" in
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0) log_end_msg 0 ;;
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1) log_end_msg 1 ;; # module never was sucessfully unloaded
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*) log_end_msg 1 ;; # failed to load module
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esac
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;;
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*)
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# failed to unload
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log_end_msg 1
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;;
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esac
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else
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log_warning_msg "$DESC not enabled in /etc/default/$NAME, not starting."
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fi
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;;
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*)
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echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
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exit 3
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;;
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esac
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:
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