1 |
dpavlin |
181 |
#!/bin/sh |
2 |
root |
175 |
|
3 |
dpavlin |
181 |
# lxc-watchdog.sh |
4 |
|
|
# |
5 |
|
|
# Dobrica Pavlinusic <dpavlin@rot13.org> 2010-03-15 |
6 |
|
|
# |
7 |
|
|
# this script can be used to start/stop Linux containers |
8 |
|
|
# using clever inotify hack to monitor halt/reboot from |
9 |
|
|
# Tony Risinger posted to lxc-users mailing list |
10 |
|
|
# |
11 |
root |
175 |
# http://www.mail-archive.com/lxc-users@lists.sourceforge.net/msg00074.html |
12 |
|
|
|
13 |
dpavlin |
181 |
|
14 |
dpavlin |
177 |
which inotifywait >/dev/null || apt-get install inotify-tools |
15 |
root |
175 |
|
16 |
dpavlin |
181 |
lxc_status() { |
17 |
|
|
lxc-ls -1 | sort -u | xargs -i lxc-info -n {} |
18 |
|
|
} |
19 |
root |
175 |
|
20 |
dpavlin |
181 |
lxc_exists() { |
21 |
|
|
name=$1 |
22 |
root |
175 |
|
23 |
dpavlin |
181 |
if [ ! -e /var/lib/lxc/$name/config ] ; then |
24 |
|
|
echo "Usage: $0 name" |
25 |
|
|
lxc_status |
26 |
|
|
exit 1 |
27 |
|
|
fi |
28 |
|
|
} |
29 |
root |
175 |
|
30 |
dpavlin |
179 |
|
31 |
dpavlin |
181 |
lxc_rootfs() { |
32 |
|
|
grep lxc.rootfs "/var/lib/lxc/$1/config" | cut -d= -f2 | sed 's/^ *//' |
33 |
|
|
} |
34 |
dpavlin |
178 |
|
35 |
root |
175 |
|
36 |
dpavlin |
181 |
cleanup_init_scripts() { |
37 |
|
|
rootfs=$(lxc_rootfs $1) |
38 |
dpavlin |
179 |
|
39 |
dpavlin |
181 |
ls \ |
40 |
|
|
$rootfs/etc/rc?.d/*umountfs \ |
41 |
|
|
$rootfs/etc/rc?.d/*umountroot \ |
42 |
|
|
$rootfs/etc/rc?.d/*hwclock* \ |
43 |
|
|
2>/dev/null | xargs -i rm -v {} |
44 |
|
|
} |
45 |
dpavlin |
179 |
|
46 |
dpavlin |
181 |
|
47 |
|
|
setup_inittab() { |
48 |
|
|
rootfs=$(lxc_rootfs $1) |
49 |
|
|
|
50 |
|
|
# let container respond to kill -SIGPWR |
51 |
|
|
inittab=$rootfs/etc/inittab |
52 |
|
|
powerfail="pw::powerfail:/sbin/init 0" |
53 |
|
|
if ! grep "$powerfail" ${inittab} >/dev/null ; then |
54 |
|
|
grep -v ::power ${inittab} > ${inittab}.new |
55 |
|
|
echo $powerfail >> ${inittab}.new |
56 |
|
|
mv ${inittab}.new ${inittab} |
57 |
|
|
echo "$initab modified" |
58 |
|
|
fi |
59 |
|
|
|
60 |
|
|
} |
61 |
|
|
|
62 |
|
|
|
63 |
|
|
lxc_stop() { |
64 |
|
|
name=$1 |
65 |
|
|
|
66 |
|
|
init_pid=`lxc-ps -C init -o pid | grep "^$name" | cut -d" " -f2-` |
67 |
|
|
if [ -z "$init_pid" ] ; then |
68 |
|
|
lxc-info -n $name |
69 |
|
|
exit 1 |
70 |
|
|
fi |
71 |
|
|
echo "$name stop $init_pid" |
72 |
|
|
/bin/kill -SIGPWR $init_pid |
73 |
dpavlin |
179 |
lxc-wait -n $name -s STOPPED |
74 |
|
|
|
75 |
dpavlin |
181 |
} |
76 |
dpavlin |
179 |
|
77 |
|
|
|
78 |
dpavlin |
181 |
lxc_start() { |
79 |
|
|
name=$1 |
80 |
|
|
|
81 |
|
|
if ! lxc-info -n $name | grep RUNNING ; then |
82 |
|
|
echo "$name start" |
83 |
|
|
lxc-start -n $name -o /tmp/${name}.log -d |
84 |
|
|
lxc-wait -n $name -s RUNNING |
85 |
|
|
lxc-info -n $name |
86 |
|
|
fi |
87 |
|
|
} |
88 |
|
|
|
89 |
|
|
lxc_watchdog() { |
90 |
|
|
name=$1 |
91 |
|
|
rootfs=$(lxc_rootfs $1) |
92 |
|
|
|
93 |
root |
175 |
while true; do |
94 |
|
|
vps_utmp=${rootfs}/var/run/utmp |
95 |
dpavlin |
181 |
tasks=`wc -l < /cgroup/${name}/tasks` |
96 |
|
|
test -z "$tasks" && exit 1 |
97 |
|
|
if [ "$tasks" -eq 1 ]; then |
98 |
root |
175 |
|
99 |
|
|
runlevel="$(runlevel ${vps_utmp})" |
100 |
|
|
echo "# $name runlevel $runlevel" |
101 |
|
|
|
102 |
|
|
case $runlevel in |
103 |
|
|
N*) |
104 |
|
|
# nothing for new boot state |
105 |
|
|
;; |
106 |
|
|
??0) |
107 |
|
|
echo "$name halt" |
108 |
|
|
lxc-stop -n "${name}" |
109 |
dpavlin |
181 |
lxc-wait -n ${name} -s STOPPED |
110 |
root |
175 |
break |
111 |
|
|
;; |
112 |
|
|
??6) |
113 |
|
|
echo "$name reboot"; |
114 |
|
|
lxc-stop -n ${name} |
115 |
|
|
lxc-wait -n ${name} -s STOPPED |
116 |
|
|
lxc-start -d -n ${name} -o /tmp/${name}.log |
117 |
|
|
;; |
118 |
|
|
*) |
119 |
|
|
# make sure vps is still running |
120 |
|
|
state="$(lxc-info -n "${name}" | sed -e 's/.* is //')" |
121 |
|
|
[ "$state" = "RUNNING" ] || break |
122 |
|
|
;; |
123 |
|
|
esac |
124 |
dpavlin |
181 |
else |
125 |
|
|
echo "# $name $tasks tasks" |
126 |
root |
175 |
fi |
127 |
dpavlin |
182 |
|
128 |
|
|
# time of 5 minutes on it JUST IN CASE... |
129 |
|
|
inotifywait -qqt 300 ${vps_utmp} |
130 |
root |
175 |
done |
131 |
|
|
|
132 |
dpavlin |
181 |
echo "${name} exited" |
133 |
|
|
|
134 |
|
|
} |
135 |
|
|
|
136 |
|
|
|
137 |
|
|
case "$1" in |
138 |
|
|
|
139 |
|
|
start) |
140 |
|
|
lxc_exists $2 |
141 |
|
|
cleanup_init_scripts $2 |
142 |
|
|
setup_inittab $2 |
143 |
|
|
lxc_start $2 |
144 |
|
|
( nohup $0 watchdog $2 >> /tmp/$2.log ) & |
145 |
|
|
;; |
146 |
|
|
stop) |
147 |
|
|
lxc_exists $2 |
148 |
|
|
lxc_stop $2 |
149 |
|
|
;; |
150 |
|
|
status) |
151 |
|
|
lxc_status |
152 |
|
|
;; |
153 |
|
|
reload|force-reload|restart) |
154 |
|
|
lxc_stop $2 |
155 |
|
|
lxc_start $2 |
156 |
|
|
;; |
157 |
|
|
watchdog) |
158 |
|
|
lxc_watchdog $2 |
159 |
|
|
;; |
160 |
|
|
*) |
161 |
|
|
echo "Usage: $0 {start|stop|restart|status}" >&2 |
162 |
|
|
exit 3 |
163 |
|
|
;; |
164 |
|
|
|
165 |
|
|
esac |
166 |
|
|
|