1 |
#!/bin/bash |
#!/bin/sh |
2 |
|
|
3 |
# based on Tony Risinger code from lxc-users |
# 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 |
# http://www.mail-archive.com/lxc-users@lists.sourceforge.net/msg00074.html |
# http://www.mail-archive.com/lxc-users@lists.sourceforge.net/msg00074.html |
12 |
|
|
13 |
|
|
14 |
which inotifywait >/dev/null || apt-get install inotify-tools |
which inotifywait >/dev/null || apt-get install inotify-tools |
15 |
|
|
|
name=$1 |
|
16 |
|
|
17 |
if [ ! -e /var/lib/lxc/$name/config ] ; then |
lxc_exists() { |
18 |
echo "Usage: $0 name" |
name=$1 |
19 |
ls /var/lib/lxc/*/config | cut -d/ -f5 |
|
20 |
exit 1 |
if [ ! -e /var/lib/lxc/$name/config ] ; then |
21 |
fi |
echo "Usage: $0 name" |
22 |
|
lxc_status |
23 |
|
exit 1 |
24 |
|
fi |
25 |
|
} |
26 |
|
|
27 |
|
|
28 |
rootfs=`grep lxc.rootfs /var/lib/lxc/$name/config | cut -d= -f2` |
lxc_rootfs() { |
29 |
echo "$name rootfs $rootfs" |
grep lxc.rootfs "/var/lib/lxc/$1/config" | cut -d= -f2 | sed 's/^ *//' |
30 |
|
} |
31 |
|
|
32 |
|
|
33 |
|
lxc_status() { |
34 |
|
lxc-ls -1 | sort -u | xargs -i lxc-info -n {} | sed "s/'//g" | while read name is status ; do |
35 |
|
on_boot=" " |
36 |
|
test -s /var/lib/lxc/$name/on_boot && on_boot="on_boot" |
37 |
|
echo "$name $status $on_boot $(lxc_rootfs $name)" |
38 |
|
done |
39 |
|
} |
40 |
|
|
41 |
|
|
42 |
|
cleanup_init_scripts() { |
43 |
|
rootfs=$(lxc_rootfs $1) |
44 |
|
|
45 |
|
ls \ |
46 |
|
$rootfs/etc/rc?.d/*umountfs \ |
47 |
|
$rootfs/etc/rc?.d/*umountroot \ |
48 |
|
$rootfs/etc/rc?.d/*hwclock* \ |
49 |
|
2>/dev/null | xargs -i rm -v {} |
50 |
|
} |
51 |
|
|
52 |
|
|
53 |
|
setup_inittab() { |
54 |
|
rootfs=$(lxc_rootfs $1) |
55 |
|
remove=$2 |
56 |
|
add=$3 |
57 |
|
|
58 |
|
# let container respond to kill -SIGPWR |
59 |
|
inittab=$rootfs/etc/inittab |
60 |
|
if ! grep "$add" ${inittab} >/dev/null ; then |
61 |
|
grep -v "$remove" ${inittab} > ${inittab}.new |
62 |
|
echo $add >> ${inittab}.new |
63 |
|
mv ${inittab}.new ${inittab} |
64 |
|
echo "$inittab modified with $add" |
65 |
|
fi |
66 |
|
} |
67 |
|
|
68 |
|
|
69 |
|
lxc_kill() { |
70 |
|
name=$1 |
71 |
|
sig=$2 |
72 |
|
|
73 |
|
init_pid=`lxc-ps -C init -o pid | grep "^$name" | cut -d" " -f2-` |
74 |
|
if [ -z "$init_pid" ] ; then |
75 |
|
lxc-info -n $name |
76 |
|
exit 1 |
77 |
|
fi |
78 |
|
echo "$name kill $sig $init_pid" |
79 |
|
/bin/kill $sig $init_pid |
80 |
|
} |
81 |
|
|
82 |
|
lxc_stop() { |
83 |
|
lxc_kill $name -SIGPWR |
84 |
|
lxc-wait -n $name -s STOPPED |
85 |
|
# rm -f /var/lib/lxc/${name}/on_boot |
86 |
|
} |
87 |
|
|
88 |
|
|
89 |
|
lxc_start() { |
90 |
|
name=$1 |
91 |
|
|
92 |
|
if ! lxc-info -n $name | grep RUNNING ; then |
93 |
|
echo "$name start" |
94 |
|
lxc-start -n $name -o /tmp/${name}.log -d |
95 |
|
lxc-wait -n $name -s RUNNING |
96 |
|
lxc-info -n $name |
97 |
|
echo $name > /var/lib/lxc/${name}/on_boot |
98 |
|
fi |
99 |
|
} |
100 |
|
|
101 |
lxc-info -n $name | grep RUNNING || lxc-start -d -n $name -o /tmp/${name}.log && echo "$name start" |
lxc_watchdog() { |
102 |
|
name=$1 |
103 |
|
rootfs=$(lxc_rootfs $1) |
104 |
|
|
105 |
while true; do |
while true; do |
|
# time of 5 minutes on it JUST IN CASE... |
|
106 |
vps_utmp=${rootfs}/var/run/utmp |
vps_utmp=${rootfs}/var/run/utmp |
107 |
inotifywait -qqt 300 ${vps_utmp} |
tasks=`wc -l < /cgroup/${name}/tasks` |
108 |
if [ $(wc -l < /cgroup/${name}/tasks) -eq 1 ]; then |
test -z "$tasks" && exit 1 |
109 |
|
if [ "$tasks" -eq 1 ]; then |
110 |
|
|
111 |
runlevel="$(runlevel ${vps_utmp})" |
runlevel="$(runlevel ${vps_utmp})" |
112 |
echo "# $name runlevel $runlevel" |
echo `date +%Y-%m-%dT%H:%M:%S` "$name runlevel $runlevel" |
113 |
|
|
114 |
case $runlevel in |
case $runlevel in |
115 |
N*) |
N*) |
118 |
??0) |
??0) |
119 |
echo "$name halt" |
echo "$name halt" |
120 |
lxc-stop -n "${name}" |
lxc-stop -n "${name}" |
121 |
|
lxc-wait -n ${name} -s STOPPED |
122 |
break |
break |
123 |
;; |
;; |
124 |
??6) |
??6) |
125 |
echo "$name reboot"; |
echo "$name reboot"; |
126 |
lxc-stop -n ${name} |
lxc-stop -n ${name} |
127 |
lxc-wait -n ${name} -s STOPPED |
lxc-wait -n ${name} -s STOPPED |
|
mount /mnt/llin -o remount,rw |
|
128 |
lxc-start -d -n ${name} -o /tmp/${name}.log |
lxc-start -d -n ${name} -o /tmp/${name}.log |
129 |
;; |
;; |
130 |
*) |
*) |
133 |
[ "$state" = "RUNNING" ] || break |
[ "$state" = "RUNNING" ] || break |
134 |
;; |
;; |
135 |
esac |
esac |
136 |
|
else |
137 |
|
echo "# $name $tasks tasks" |
138 |
fi |
fi |
139 |
|
|
140 |
|
# time of 5 minutes on it JUST IN CASE... |
141 |
|
inotifywait -qqt 300 ${vps_utmp} |
142 |
done |
done |
143 |
|
|
144 |
|
echo "${name} exited" |
145 |
|
|
146 |
|
} |
147 |
|
|
148 |
|
|
149 |
|
command_on_lxc() { |
150 |
|
command=$1 |
151 |
|
shift |
152 |
|
|
153 |
|
echo "# $command $1" |
154 |
|
|
155 |
|
case "$command" in |
156 |
|
|
157 |
|
start) |
158 |
|
lxc_exists $1 |
159 |
|
cleanup_init_scripts $1 |
160 |
|
setup_inittab $1 ::power "p0::powerfail:/sbin/init 0" |
161 |
|
setup_inittab $1 ::ctrlaltdel "p6::ctrlaltdel:/sbin/init 6" |
162 |
|
lxc_start $1 |
163 |
|
( nohup $0 watchdog $1 >> /tmp/$1.log 2>/dev/null ) & |
164 |
|
;; |
165 |
|
stop|halt) |
166 |
|
lxc_exists $1 |
167 |
|
lxc_stop $1 |
168 |
|
;; |
169 |
|
reload|force-reload|restart|reboot) |
170 |
|
lxc_kill $1 -SIGINT |
171 |
|
;; |
172 |
|
watchdog) |
173 |
|
lxc_watchdog $1 |
174 |
|
;; |
175 |
|
*) |
176 |
|
echo "Usage: $0 {start|stop|restart|status}" >&2 |
177 |
|
exit 3 |
178 |
|
;; |
179 |
|
|
180 |
|
esac |
181 |
|
|
182 |
|
} |
183 |
|
|
184 |
|
command=$1 |
185 |
|
shift |
186 |
|
|
187 |
|
test "$command" = "status" && lxc_status && exit |
188 |
|
|
189 |
|
if [ -z "$1" ] ; then |
190 |
|
ls /var/lib/lxc/*/on_boot | while read path ; do |
191 |
|
name=`echo $path | cut -d/ -f5` |
192 |
|
command_on_lxc $command $name |
193 |
|
done |
194 |
|
else |
195 |
|
while [ ! -z "$1" ] ; do |
196 |
|
command_on_lxc $command $1 |
197 |
|
shift |
198 |
|
done |
199 |
|
fi |
200 |
|
|