3 # Provides: lxc-watchdog
4 # Required-Start: $remote_fs $named $network $time
5 # Required-Stop: $remote_fs $named $network
8 # Default-Start: 2 3 4 5
10 # Short-Description: Manage Linux Containers startup/shutdown
11 # Description: Uses clever inotify hack to monitor container's
12 # halt/reboot events watching /var/run/utmp
15 # Author: Dobrica Pavlinusic <dpavlin@rot13.org>
17 # based on Tony Risinger post to lxc-users mailing list
18 # http://www.mail-archive.com/lxc-users@lists.sourceforge.net/msg00074.html
21 # ln -sf /srv/sysadmin-cookbook/recepies/lxc/lxc-watchdog.sh /etc/init.d/lxc-watchdog
22 # update-rc.d lxc-watchdog defaults
25 which inotifywait >/dev/null || apt-get install inotify-tools
31 if [ ! -e /var/lib/lxc/$name/config ] ; then
40 grep '^ *lxc\.rootfs *=' "/var/lib/lxc/$1/config" | cut -d= -f2 | sed 's/^ *//'
45 ( find /var/lib/lxc/ -name "config" | cut -d/ -f5 | sort -u | xargs -i lxc-info -n {} | sed "s/'//g" | while read name is status ; do
47 test -s /var/lib/lxc/$name/on_boot && boot="boot"
48 echo "$name $status $boot $(lxc_rootfs $name)"
53 cleanup_init_scripts() {
54 rootfs=$(lxc_rootfs $1)
57 $rootfs/etc/rc?.d/*umountfs \
58 $rootfs/etc/rc?.d/*umountroot \
59 $rootfs/etc/rc?.d/*hwclock* \
60 2>/dev/null | xargs -i rm -v {}
65 rootfs=$(lxc_rootfs $1)
69 # let container respond to kill -SIGPWR
70 inittab=$rootfs/etc/inittab
71 if ! grep "$add" ${inittab} >/dev/null ; then
72 grep -v "$remove" ${inittab} > ${inittab}.new
73 echo $add >> ${inittab}.new
74 mv ${inittab}.new ${inittab}
75 echo "$inittab modified with $add"
81 echo `date +%Y-%m-%dT%H:%M:%S` $*
89 init_pid=`lxc-ps -C init -o pid | grep "^$name" | cut -d" " -f2-`
90 if [ -z "$init_pid" ] ; then
94 lxc_log "$name kill $sig $init_pid"
95 /bin/kill $sig $init_pid
100 lxc_kill $name -SIGPWR
101 lxc-wait -n $name -s STOPPED
102 lxc_log "$name stoped"
103 # rm -f /var/lib/lxc/${name}/on_boot
110 if ! lxc-info -n $name | grep RUNNING ; then
111 lxc_log "$name start"
112 lxc-start -n $name -o /tmp/${name}.log -d
113 lxc-wait -n $name -s RUNNING
115 test -f /var/lib/lxc/${name}/on_boot || echo $name > /var/lib/lxc/${name}/on_boot
121 rootfs=$(lxc_rootfs $1)
124 vps_utmp=${rootfs}/var/run/utmp
125 tasks=`wc -l < /cgroup/${name}/tasks`
126 test -z "$tasks" && exit 1
127 if [ "$tasks" -eq 1 ]; then
129 runlevel="$(runlevel ${vps_utmp})"
130 lxc_log "$name runlevel $runlevel"
134 # nothing for new boot state
138 lxc-stop -n "${name}"
139 lxc-wait -n ${name} -s STOPPED
143 lxc_log "$name reboot";
145 lxc-wait -n ${name} -s STOPPED
146 lxc-start -d -n ${name} -o /tmp/${name}.log
149 # make sure vps is still running
150 state="$(lxc-info -n "${name}" | sed -e 's/.* is //')"
151 [ "$state" = "RUNNING" ] || break
155 lxc_log "$name $tasks tasks"
158 # time of 5 minutes on it JUST IN CASE...
159 inotifywait -qqt 300 ${vps_utmp}
162 lxc_log "$name watchdog exited"
168 echo "Usage: $0 {start|stop|restart|status|boot|disable} [name name ... ]" >&2
182 cleanup_init_scripts $1
183 setup_inittab $1 ":respawn:/sbin/getty.*tty1" "c1:12345:respawn:/sbin/getty 38400 tty1 linux"
184 setup_inittab $1 "::power" "p0::powerfail:/sbin/init 0"
185 setup_inittab $1 "::ctrlaltdel" "p6::ctrlaltdel:/sbin/init 6"
187 # give container 5 seconds to start more than one process
188 ( sleep 5 ; nohup $0 watchdog $1 >> /tmp/$1.log 2>/dev/null ) &
194 reload|force-reload|restart|reboot)
201 echo $1 > /var/lib/lxc/$1/on_boot
204 echo -n > /var/lib/lxc/$1/on_boot
215 test -z "$command" && usage
216 test "$command" = "status" && lxc_status && exit
219 if [ -z "$1" ] ; then
220 ls /var/lib/lxc/*/on_boot | while read path ; do
221 name=`echo $path | cut -d/ -f5`
222 if [ "$command" != "start" -o "$command" = "start" -a -s $path ] ; then
223 command_on_lxc $command $name
225 echo "# skip $command $name"
229 while [ ! -z "$1" ] ; do
230 command_on_lxc $command $1