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744d6961f9
Introduce CONFIG_LEAF_DIR, SUBSYS_DIR, INITD_DIR variables to cope better with variation between distributions. See docs/misc/distro_mapping.txt for details. Signed-off-by: Bruce Edge <bruce.edge@gmail.com> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
577 lines
13 KiB
Bash
577 lines
13 KiB
Bash
#!/bin/bash
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#
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# /etc/init.d/xendomains
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# Start / stop domains automatically when domain 0 boots / shuts down.
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#
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# chkconfig: 345 99 00
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# description: Start / stop Xen domains.
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#
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# This script offers fairly basic functionality. It should work on Redhat
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# but also on LSB-compliant SuSE releases and on Debian with the LSB package
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# installed. (LSB is the Linux Standard Base)
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#
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# Based on the example in the "Designing High Quality Integrated Linux
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# Applications HOWTO" by Avi Alkalay
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# <http://www.tldp.org/HOWTO/HighQuality-Apps-HOWTO/>
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#
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### BEGIN INIT INFO
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# Provides: xendomains
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# Required-Start: $syslog $remote_fs xend
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# Should-Start:
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# Required-Stop: $syslog $remote_fs xend
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# Should-Stop:
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# Default-Start: 3 4 5
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# Default-Stop: 0 1 2 6
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# Short-Description: Start/stop secondary xen domains
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# Description: Start / stop domains automatically when domain 0
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# boots / shuts down.
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### END INIT INFO
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CMD=xm
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$CMD list &> /dev/null
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if test $? -ne 0
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then
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CMD=xl
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fi
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$CMD list &> /dev/null
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if test $? -ne 0
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then
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exit 0;
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fi
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# Correct exit code would probably be 5, but it's enough
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# if xend complains if we're not running as privileged domain
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if ! [ -e /proc/xen/privcmd ]; then
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exit 0
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fi
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# See docs/misc/distro_mapping.txt
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if [ -d /var/lock/subsys ]; then
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LOCKFILE=/var/lock/subsys/xendomains
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else
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LOCKFILE=/var/lock/xendomains
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fi
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if [ -d /etc/sysconfig ]; then
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XENDOM_CONFIG=/etc/sysconfig/xendomains
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else
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XENDOM_CONFIG=/etc/default/xendomains
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fi
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test -r $XENDOM_CONFIG || { echo "$XENDOM_CONFIG not existing";
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if [ "$1" = "stop" ]; then exit 0;
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else exit 6; fi; }
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. $XENDOM_CONFIG
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# Use the SUSE rc_ init script functions;
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# emulate them on LSB, RH and other systems
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if test -e /etc/rc.status; then
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# SUSE rc script library
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. /etc/rc.status
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else
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_cmd=$1
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declare -a _SMSG
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if test "${_cmd}" = "status"; then
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_SMSG=(running dead dead unused unknown)
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_RC_UNUSED=3
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else
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_SMSG=(done failed failed missed failed skipped unused failed failed)
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_RC_UNUSED=6
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fi
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if test -e /etc/init.d/functions; then
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# REDHAT
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. /etc/init.d/functions
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echo_rc()
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{
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#echo -n " [${_SMSG[${_RC_RV}]}] "
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if test ${_RC_RV} = 0; then
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success " [${_SMSG[${_RC_RV}]}] "
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else
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failure " [${_SMSG[${_RC_RV}]}] "
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fi
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}
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elif test -e /lib/lsb/init-functions; then
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# LSB
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. /lib/lsb/init-functions
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if alias log_success_msg >/dev/null 2>/dev/null; then
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echo_rc()
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{
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echo " [${_SMSG[${_RC_RV}]}] "
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}
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else
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echo_rc()
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{
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if test ${_RC_RV} = 0; then
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log_success_msg " [${_SMSG[${_RC_RV}]}] "
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else
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log_failure_msg " [${_SMSG[${_RC_RV}]}] "
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fi
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}
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fi
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else
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# emulate it
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echo_rc()
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{
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echo " [${_SMSG[${_RC_RV}]}] "
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}
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fi
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rc_reset() { _RC_RV=0; }
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rc_failed()
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{
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if test -z "$1"; then
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_RC_RV=1;
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elif test "$1" != "0"; then
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_RC_RV=$1;
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fi
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return ${_RC_RV}
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}
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rc_check()
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{
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return rc_failed $?
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}
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rc_status()
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{
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rc_failed $?
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if test "$1" = "-r"; then _RC_RV=0; shift; fi
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if test "$1" = "-s"; then rc_failed 5; echo_rc; rc_failed 3; shift; fi
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if test "$1" = "-u"; then rc_failed ${_RC_UNUSED}; echo_rc; rc_failed 3; shift; fi
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if test "$1" = "-v"; then echo_rc; shift; fi
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if test "$1" = "-r"; then _RC_RV=0; shift; fi
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return ${_RC_RV}
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}
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rc_exit() { exit ${_RC_RV}; }
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rc_active()
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{
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if test -z "$RUNLEVEL"; then read RUNLEVEL REST < <(/sbin/runlevel); fi
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if test -e /etc/init.d/S[0-9][0-9]${1}; then return 0; fi
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return 1
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}
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fi
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if ! which usleep >&/dev/null
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then
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usleep()
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{
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if [ -n "$1" ]
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then
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sleep $(( $1 / 1000000 ))
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fi
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}
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fi
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# Reset status of this service
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rc_reset
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##
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# Returns 0 (success) if the given parameter names a directory, and that
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# directory is not empty.
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#
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contains_something()
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{
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if [ -d "$1" ] && [ `/bin/ls $1 | wc -l` -gt 0 ]
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then
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return 0
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else
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return 1
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fi
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}
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# read name from xen config file
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rdname()
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{
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NM=$($CMD create --quiet --dryrun --defconfig "$1" |
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sed -n 's/^.*(name \(.*\))$/\1/p')
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}
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rdnames()
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{
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NAMES=
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if ! contains_something "$XENDOMAINS_AUTO"
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then
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return
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fi
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for dom in $XENDOMAINS_AUTO/*; do
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rdname $dom
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if test -z $NAMES; then
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NAMES=$NM;
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else
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NAMES="$NAMES|$NM"
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fi
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done
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}
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parseln()
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{
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if [[ "$1" =~ '(domain' ]]; then
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name=;id=
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else if [[ "$1" =~ '(name' ]]; then
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name=$(echo $1 | sed -e 's/^.*(name \(.*\))$/\1/')
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else if [[ "$1" =~ '(domid' ]]; then
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id=$(echo $1 | sed -e 's/^.*(domid \(.*\))$/\1/')
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fi; fi; fi
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[ -n "$name" -a -n "$id" ] && return 0 || return 1
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}
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is_running()
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{
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rdname $1
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RC=1
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name=;id=
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while read LN; do
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parseln "$LN" || continue
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if test $id = 0; then continue; fi
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case $name in
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($NM)
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RC=0
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;;
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esac
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done < <($CMD list -l | grep '(\(domain\|domid\|name\)')
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return $RC
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}
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start()
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{
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if [ -f $LOCKFILE ]; then
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echo -e "xendomains already running (lockfile exists)"
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return;
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fi
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saved_domains=" "
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if [ "$XENDOMAINS_RESTORE" = "true" ] &&
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contains_something "$XENDOMAINS_SAVE"
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then
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mkdir -p $(dirname "$LOCKFILE")
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touch $LOCKFILE
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echo -n "Restoring Xen domains:"
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saved_domains=`ls $XENDOMAINS_SAVE`
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for dom in $XENDOMAINS_SAVE/*; do
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if [ -f $dom ] ; then
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HEADER=`head -c 16 $dom | head -n 1 2> /dev/null`
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if [ $HEADER = "LinuxGuestRecord" ]; then
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echo -n " ${dom##*/}"
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XMR=`$CMD restore $dom 2>&1 1>/dev/null`
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#$CMD restore $dom
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if [ $? -ne 0 ]; then
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echo -e "\nAn error occurred while restoring domain ${dom##*/}:\n$XMR"
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rc_failed $?
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echo -e '!'
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else
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# mv $dom ${dom%/*}/.${dom##*/}
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rm $dom
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fi
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fi
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fi
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done
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echo -e
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fi
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if contains_something "$XENDOMAINS_AUTO"
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then
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touch $LOCKFILE
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echo -n "Starting auto Xen domains:"
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# We expect config scripts for auto starting domains to be in
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# XENDOMAINS_AUTO - they could just be symlinks to files elsewhere
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# Create all domains with config files in XENDOMAINS_AUTO.
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# TODO: We should record which domain name belongs
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# so we have the option to selectively shut down / migrate later
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# If a domain statefile from $XENDOMAINS_SAVE matches a domain name
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# in $XENDOMAINS_AUTO, do not try to start that domain; if it didn't
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# restore correctly it requires administrative attention.
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for dom in $XENDOMAINS_AUTO/*; do
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echo -n " ${dom##*/}"
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shortdom=$(echo $dom | sed -n 's/^.*\/\(.*\)$/\1/p')
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echo $saved_domains | grep -w $shortdom > /dev/null
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if [ $? -eq 0 ] || is_running $dom; then
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echo -n "(skip)"
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else
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XMC=`$CMD create --quiet --defconfig $dom`
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if [ $? -ne 0 ]; then
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echo -e "\nAn error occurred while creating domain ${dom##*/}: $XMC\n"
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rc_failed $?
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echo -e '!'
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else
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usleep $XENDOMAINS_CREATE_USLEEP
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fi
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fi
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done
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fi
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}
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all_zombies()
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{
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name=;id=
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while read LN; do
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parseln "$LN" || continue
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if test $id = 0; then continue; fi
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if test "$state" != "-b---d" -a "$state" != "-----d"; then
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return 1;
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fi
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done < <($CMD list -l | grep '(\(domain\|domid\|name\)')
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return 0
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}
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# Wait for max $XENDOMAINS_STOP_MAXWAIT for $CMD $1 to finish;
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# if it has not exited by that time kill it, so the init script will
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# succeed within a finite amount of time; if $2 is nonnull, it will
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# kill the command as well as soon as no domain (except for zombies)
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# are left (used for shutdown --all). Third parameter, if any, suppresses
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# output of dots per working state (formatting issues)
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watchdog_xencmd()
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{
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if test -z "$XENDOMAINS_STOP_MAXWAIT" -o "$XENDOMAINS_STOP_MAXWAIT" = "0"; then
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exit
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fi
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usleep 20000
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for no in `seq 0 $XENDOMAINS_STOP_MAXWAIT`; do
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# exit if $CMD save/migrate/shutdown is finished
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PSAX=`ps axlw | grep "$CMD $1" | grep -v grep`
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if test -z "$PSAX"; then exit; fi
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if ! test -n "$3"; then echo -n '.'; fi
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sleep 1
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# go to kill immediately if there's only zombies left
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if all_zombies && test -n "$2"; then break; fi
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done
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sleep 1
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read PSF PSUID PSPID PSPPID < <(echo "$PSAX")
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# kill $CMD $1
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kill $PSPID >/dev/null 2>&1
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echo -e .
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}
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stop()
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{
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exec 3>&2 2> /dev/null
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# Collect list of domains to shut down
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if test "$XENDOMAINS_AUTO_ONLY" = "true"; then
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rdnames
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fi
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echo -n "Shutting down Xen domains:"
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name=;id=
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while read LN; do
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parseln "$LN" || continue
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if test $id = 0; then continue; fi
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echo -n " $name"
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if test "$XENDOMAINS_AUTO_ONLY" = "true"; then
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eval "
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case \"\$name\" in
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($NAMES)
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# nothing
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;;
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(*)
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echo -e '(skip)'
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continue
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;;
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esac
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"
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fi
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# XENDOMAINS_SYSRQ chould be something like just "s"
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# or "s e i u" or even "s e s i u o"
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# for the latter, you should set XENDOMAINS_USLEEP to 1200000 or so
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if test -n "$XENDOMAINS_SYSRQ"; then
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for sysrq in $XENDOMAINS_SYSRQ; do
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echo -n "(SR-$sysrq)"
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XMR=`$CMD sysrq $id $sysrq 2>&1 1>/dev/null`
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if test $? -ne 0; then
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echo -e "\nAn error occurred while doing sysrq on domain:\n$XMR\n"
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rc_failed $?
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echo -n '!'
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fi
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# usleep just ignores empty arg
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usleep $XENDOMAINS_USLEEP
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done
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fi
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if test "$state" = "-b---d" -o "$state" = "-----d"; then
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echo -n "(zomb)"
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continue
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fi
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if test -n "$XENDOMAINS_MIGRATE"; then
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echo -n "(migr)"
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watchdog_xencmd migrate &
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WDOG_PID=$!
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XMR=`$CMD migrate $id $XENDOMAINS_MIGRATE 2>&1 1>/dev/null`
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if test $? -ne 0; then
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echo -e "\nAn error occurred while migrating domain:\n$XMR\n"
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rc_failed $?
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echo -e '!'
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kill $WDOG_PID >/dev/null 2>&1
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else
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kill $WDOG_PID >/dev/null 2>&1
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echo -e .
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usleep 1000
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continue
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fi
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fi
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if test -n "$XENDOMAINS_SAVE"; then
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echo -n "(save)"
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watchdog_xencmd save &
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WDOG_PID=$!
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mkdir -p "$XENDOMAINS_SAVE"
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XMR=`$CMD save $id $XENDOMAINS_SAVE/$name 2>&1 1>/dev/null`
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if test $? -ne 0; then
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echo -e "\nAn error occurred while saving domain:\n$XMR\n"
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rc_failed $?
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echo -e '!'
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kill $WDOG_PID >/dev/null 2>&1
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else
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kill $WDOG_PID >/dev/null 2>&1
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echo -e .
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usleep 1000
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continue
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fi
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fi
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if test -n "$XENDOMAINS_SHUTDOWN"; then
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# XENDOMAINS_SHUTDOWN should be "--halt --wait"
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echo -n "(shut)"
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watchdog_xencmd shutdown &
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WDOG_PID=$!
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XMR=`$CMD shutdown $id $XENDOMAINS_SHUTDOWN 2>&1 1>/dev/null`
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if test $? -ne 0; then
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echo -e "\nAn error occurred while shutting down domain:\n$XMR\n"
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rc_failed $?
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echo -e '!'
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fi
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kill $WDOG_PID >/dev/null 2>&1
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fi
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done < <($CMD list -l | grep '(\(domain\|domid\|name\)')
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# NB. this shuts down ALL Xen domains (politely), not just the ones in
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# AUTODIR/*
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# This is because it's easier to do ;-) but arguably if this script is run
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# on system shutdown then it's also the right thing to do.
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if ! all_zombies && test -n "$XENDOMAINS_SHUTDOWN_ALL"; then
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# XENDOMAINS_SHUTDOWN_ALL should be "--all --halt --wait"
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echo -n " SHUTDOWN_ALL "
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watchdog_xencmd shutdown 1 false &
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WDOG_PID=$!
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XMR=`$CMD shutdown $XENDOMAINS_SHUTDOWN_ALL 2>&1 1>/dev/null`
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if test $? -ne 0; then
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echo -e "\nAn error occurred while shutting down all domains: $XMR\n"
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rc_failed $?
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echo -e '!'
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fi
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kill $WDOG_PID >/dev/null 2>&1
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fi
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# Unconditionally delete lock file
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rm -f $LOCKFILE
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exec 2>&3
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}
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check_domain_up()
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{
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name=;id=
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while read LN; do
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parseln "$LN" || continue
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if test $id = 0; then continue; fi
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case $name in
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($1)
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return 0
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;;
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esac
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done < <($CMD list -l | grep '(\(domain\|domid\|name\)')
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return 1
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}
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check_all_auto_domains_up()
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{
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if ! contains_something "$XENDOMAINS_AUTO"
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then
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return 0
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fi
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missing=
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for nm in $XENDOMAINS_AUTO/*; do
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rdname $nm
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found=0
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if check_domain_up "$NM"; then
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echo -n " $name"
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else
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missing="$missing $NM"
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fi
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done
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if test -n "$missing"; then
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echo -n " MISS AUTO:$missing"
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return 1
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fi
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return 0
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}
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check_all_saved_domains_up()
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{
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if ! contains_something "$XENDOMAINS_SAVE"
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then
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return 0
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fi
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missing=`/bin/ls $XENDOMAINS_SAVE`
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echo -n " MISS SAVED: " $missing
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return 1
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}
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# This does NOT necessarily restart all running domains: instead it
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# stops all running domains and then boots all the domains specified in
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# AUTODIR. If other domains have been started manually then they will
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# not get restarted.
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# Commented out to avoid confusion!
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restart()
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{
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stop
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start
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}
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reload()
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{
|
|
restart
|
|
}
|
|
|
|
|
|
case "$1" in
|
|
start)
|
|
start
|
|
rc_status
|
|
if test -f $LOCKFILE; then rc_status -v; fi
|
|
;;
|
|
|
|
stop)
|
|
stop
|
|
rc_status -v
|
|
;;
|
|
|
|
restart)
|
|
restart
|
|
;;
|
|
reload)
|
|
reload
|
|
;;
|
|
|
|
status)
|
|
echo -n "Checking for xendomains:"
|
|
if test ! -f $LOCKFILE; then
|
|
rc_failed 3
|
|
else
|
|
check_all_auto_domains_up
|
|
rc_status
|
|
check_all_saved_domains_up
|
|
rc_status
|
|
fi
|
|
rc_status -v
|
|
;;
|
|
|
|
*)
|
|
echo "Usage: $0 {start|stop|restart|reload|status}"
|
|
rc_failed 3
|
|
rc_status -v
|
|
;;
|
|
esac
|
|
|
|
rc_exit
|