--- /dev/null
+## Path: System/xen
+## Description: xen domain start/stop on boot
+## Type: string
+## Default:
+#
+# The xendomains script can send SysRq requests to domains on shutdown.
+# If you don't want to MIGRATE, SAVE, or SHUTDOWN, this may be a possibility
+# to do a quick and dirty shutdown ("s e i u o") or at least sync the disks
+# of the domains ("s").
+#
+XENDOMAINS_SYSRQ=""
+
+## Type: integer
+## Default: 100000
+#
+# If XENDOMAINS_SYSRQ is set, this variable determines how long to wait
+# (in microseconds) after each SysRq, so the domain has a chance to react.
+# If you want to a quick'n'dirty shutdown via SysRq, you may want to set
+# it to a relatively high value (1200000).
+#
+XENDOMAINS_USLEEP=100000
+
+## Type: string
+## Default: ""
+#
+# Set this to a non-empty string if you want to migrate virtual machines
+# on shutdown. The string will be passed to the xm migrate DOMID command
+# as is: It should contain the target IP address of the physical machine
+# to migrate to and optionally parameters like --live. Leave empty if
+# you don't want to try virtual machine relocation on shutdown.
+# If migration succeeds, neither SAVE nor SHUTDOWN will be executed for
+# that domain.
+#
+XENDOMAINS_MIGRATE=""
+
+## Type: string
+## Default: /var/lib/xen/save
+#
+# Directory to save running domains to when the system (dom0) is
+# shut down. Will also be used to restore domains from if # XENDOMAINS_RESTORE
+# is set (see below). Leave empty to disable domain saving on shutdown
+# (e.g. because you rather shut domains down).
+# If domain saving does succeed, SHUTDOWN will not be executed.
+#
+XENDOMAINS_SAVE=/var/lib/xen/save
+
+## Type: string
+## Default: "--halt --wait"
+#
+# If neither MIGRATE nor SAVE were enabled or if they failed, you can
+# try to shut down a domain by sending it a shutdown request. To do this,
+# set this to "--halt --wait". Omit the "--wait" flag to avoid waiting
+# for the domain to be really down. Leave empty to skip domain shutdown.
+#
+XENDOMAINS_SHUTDOWN="--halt --wait"
+
+## Type: string
+## Default: "--all --halt --wait"
+#
+# After we have gone over all virtual machines (resp. all automatically
+# started ones, see XENDOMAINS_AUTO_ONLY below) in a loop and sent SysRq,
+# migrated, saved and/or shutdown according to the settings above, we
+# might want to shutdown the virtual machines that are still running
+# for some reason or another. To do this, set this variable to
+# "--all --halt --wait", it will be passed to xm shutdown.
+# Leave it empty not to do anything special here.
+# (Note: This will hit all virtual machines, even if XENDOMAINS_AUTO_ONLY
+# is set.)
+#
+XENDOMAINS_SHUTDOWN_ALL="--all --halt --wait"
+
+## Type: boolean
+## Default: true
+#
+# This variable determines whether saved domains from XENDOMAINS_SAVE
+# will be restored on system startup.
+#
+XENDOMAINS_RESTORE=true
+
+## Type: string
+## Default: /etc/xen/auto
+#
+# This variable sets the directory where domains configurations
+# are stored that should be started on system startup automatically.
+# Leave empty if you don't want to start domains automatically
+# (or just don't place any xen domain config files in that dir).
+# Note that the script tries to be clever if both RESTORE and AUTO are
+# set: It will first restore saved domains and then only start domains
+# in AUTO which are not running yet.
+# Note that the name matching is somewhat fuzzy.
+#
+XENDOMAINS_AUTO=/etc/xen/auto
+
+## Type: boolean
+## Default: false
+#
+# If this variable is set to "true", only the domains started via config
+# files in XENDOMAINS_AUTO will be treated according to XENDOMAINS_SYSRQ,
+# XENDOMAINS_MIGRATE, XENDOMAINS_SAVE, XENDMAINS_SHUTDOWN; otherwise
+# all running domains will be.
+# Note that the name matching is somewhat fuzzy.
+#
+XENDOMAINS_AUTO_ONLY=false
+
+## Type: integer
+## Default: 300
+#
+# On xendomains stop, a number of xm commands (xm migrate, save, shutdown,
+# shutdown --all) may be executed. In the worst case, these commands may
+# stall forever, which will prevent a successful shutdown of the machine.
+# If this variable is non-zero, the script will set up a watchdog timer
+# for every of these xm commands and time it out after the number of seconds
+# specified by this variable.
+# Note that SHUTDOWN_ALL will not be called if no virtual machines or only
+# zombies are still running, so you don't need to enable this timeout just
+# for the zombie case.
+# The setting should be large enough to make sure that migrate/save/shutdown
+# can succeed. If you do live migrations, keep in mind that live migration
+# of a 1GB machine over Gigabit ethernet may actually take something like
+# 100s (assuming that live migration uses 10% of the network # bandwidth).
+# Depending on the virtual machine, a shutdown may also require a significant
+# amount of time. So better setup this variable to a huge number and hope the
+# watchdog never fires.
+#
+XENDOMAINS_STOP_MAXWAIT=300
+
-#!/bin/sh
+#!/bin/bash
#
# /etc/init.d/xendomains
# Start / stop domains automatically when domain 0 boots / shuts down.
# Should-Stop:
# Default-Start: 3 4 5
# Default-Stop: 0 1 2 6
+# Default-Enabled: yes
# Short-Description: Start/stop secondary xen domains
# Description: Start / stop domains automatically when domain 0
# boots / shuts down.
### END INIT INFO
+# Correct exit code would probably be 5, but it's enough
+# if xend complains if we're not running as privileged domain
if ! [ -e /proc/xen/privcmd ]; then
exit 0
fi
-RETVAL=0
-
-INITD=/etc/init.d
-
-AUTODIR=/etc/xen/auto
LOCKFILE=/var/lock/subsys/xendomains
+XENDOM_CONFIG=/etc/sysconfig/xendomains
-if [ -e /lib/lsb ]; then
- # assume an LSB-compliant distro (Debian with LSB package,
- # recent-enough SuSE, others...)
+test -r $XENDOM_CONFIG || { echo "$XENDOM_CONFIG not existing";
+ if [ "$1" = "stop" ]; then exit 0;
+ else exit 6; fi; }
- . /lib/lsb/init-functions # source LSB standard functions
+. $XENDOM_CONFIG
- on_fn_exit()
+# Use the SUSE rc_ init script functions;
+# emulate them on LSB, RH and other systems
+if test -e /etc/rc.status; then
+ # SUSE rc script library
+ . /etc/rc.status
+else
+ _cmd=$1
+ declare -a _SMSG
+ if test "${_cmd}" = "status"; then
+ _SMSG=(running dead dead unused unknown)
+ _RC_UNUSED=3
+ else
+ _SMSG=(done failed failed missed failed skipped unused failed failed)
+ _RC_UNUSED=6
+ fi
+ if test -e /lib/lsb/init-functions; then
+ # LSB
+ . /lib/lsb/init-functions
+ echo_rc()
+ {
+ if test ${_RC_RV} = 0; then
+ log_success_msg " [${_SMSG[${_RC_RV}]}] "
+ else
+ log_failure_msg " [${_SMSG[${_RC_RV}]}] "
+ fi
+ }
+ elif test -e /etc/init.d/functions; then
+ # REDHAT
+ . /etc/init.d/functions
+ echo_rc()
+ {
+ #echo -n " [${_SMSG[${_RC_RV}]}] "
+ if test ${_RC_RV} = 0; then
+ success " [${_SMSG[${_RC_RV}]}] "
+ else
+ failure " [${_SMSG[${_RC_RV}]}] "
+ fi
+ }
+ else
+ # emulate it
+ echo_rc()
+ {
+ echo " [${_SMSG[${_RC_RV}]}] "
+ }
+ fi
+ rc_reset() { _RC_RV=0; }
+ rc_failed()
{
- if [ $RETVAL -eq 0 ]; then
- log_success_msg
- else
- log_failure_msg
- fi
+ if test -z "$1"; then
+ _RC_RV=1;
+ elif test "$1" != "0"; then
+ _RC_RV=$1;
+ fi
+ return ${_RC_RV}
}
-elif [ -r $INITD/functions ]; then
- # assume a Redhat-like distro
- . $INITD/functions # source Redhat functions
-
- on_fn_exit()
+ rc_check()
{
- if [ $RETVAL -eq 0 ]; then
- success
- else
- failure
- fi
-
- echo
+ return rc_failed $?
+ }
+ rc_status()
+ {
+ rc_failed $?
+ if test "$1" = "-r"; then _RC_RV=0; shift; fi
+ if test "$1" = "-s"; then rc_failed 5; echo_rc; rc_failed 3; shift; fi
+ if test "$1" = "-u"; then rc_failed ${_RC_UNUSED}; echo_rc; rc_failed 3; shift; fi
+ if test "$1" = "-v"; then echo_rc; shift; fi
+ if test "$1" = "-r"; then _RC_RV=0; shift; fi
+ return ${_RC_RV}
}
-else
- # none of the above
- LOCKFILE=/var/lock/xendomains
-
- on_fn_exit()
+ rc_exit() { exit ${_RC_RV}; }
+ rc_active()
{
- echo
+ if test -z "$RUNLEVEL"; then read RUNLEVEL REST < <(/sbin/runlevel); fi
+ if test -e /etc/init.d/S[0-9][0-9]${1}; then return 0; fi
+ return 1
}
fi
+# Reset status of this service
+rc_reset
+
+# read name from xen config file
+rdname()
+{
+ NM=`grep '^name *=' $1 | sed -e 's/^name *= *"\([^"]*\)".*$/\1/' -e 's/%[id]/[0-9]*/g'`
+}
+
+rdnames()
+{
+ NAMES=
+ if test ! -d $XENDOMAINS_AUTO -o `/bin/ls $XENDOMAINS_AUTO | wc -l` -eq 0; then
+ return
+ fi
+ for dom in $XENDOMAINS_AUTO/*; do
+ rdname $dom
+ if test -z $NAMES; then
+ NAMES=$NM;
+ else
+ NAMES="$NAMES|$NM"
+ fi
+ done
+}
+
+parseln()
+{
+ name=`echo "$1" | cut -c0-17`
+ name=${name%% *}
+ rest=`echo "$1" | cut -c18- `
+ read id mem cpu vcpu state tm < <(echo "$rest")
+}
+is_running()
+{
+ rdname $1
+ RC=1
+ while read LN; do
+ parseln "$LN"
+ if test $id = 0; then continue; fi
+ case $name in
+ ($NM)
+ RC=0
+ ;;
+ esac
+ done < <(xm list | grep -v '^Name')
+ return $RC
+}
-start() {
- if [ -f $LOCKFILE ]; then return; fi
+start()
+{
+ if [ -f $LOCKFILE ]; then
+ echo -n "xendomains already running (lockfile exists)"
+ return;
+ fi
- echo -n $"Starting auto Xen domains:"
+ if test "$XENDOMAINS_RESTORE" = "true" -a -n "$XENDOMAINS_SAVE" \
+ -a -d $XENDOMAINS_SAVE -a `/bin/ls $XENDOMAINS_SAVE | wc -l` -gt 0; then
- # We expect config scripts for auto starting domains to be in
- # AUTODIR - they could just be symlinks to files elsewhere
- if [ -d $AUTODIR ] && [ $(ls $AUTODIR | wc -l) -gt 0 ]; then
touch $LOCKFILE
-
- # Create all domains with config files in AUTODIR.
- for dom in $AUTODIR/*; do
- xm create --quiet --defconfig $dom
+ echo -n "Restoring Xen domains:"
+ for dom in $XENDOMAINS_SAVE/*; do
+ echo -n " ${dom##*/}"
+ xm restore $dom
if [ $? -ne 0 ]; then
- RETVAL=$?
+ rc_failed $?
+ echo -n '!'
+ else
+ # mv $dom ${dom%/*}/.${dom##*/}
+ rm $dom
fi
done
-
fi
- on_fn_exit
+ if test -n "$XENDOMAINS_AUTO" -a -d $XENDOMAINS_AUTO \
+ -a `/bin/ls $XENDOMAINS_AUTO | wc -l` -gt 0; then
+
+ touch $LOCKFILE
+ echo -n "Starting auto Xen domains:"
+ # We expect config scripts for auto starting domains to be in
+ # XENDOMAINS_AUTO - they could just be symlinks to files elsewhere
+
+ # Create all domains with config files in XENDOMAINS_AUTO.
+ # TODO: We should record which domain name belongs
+ # so we have the option to selectively shut down / migrate later
+ for dom in $XENDOMAINS_AUTO/*; do
+ echo -n " ${dom##*/}"
+ if is_running $dom; then
+ echo -n "(skip)"
+ else
+ xm create --quiet --defconfig $dom
+ if [ $? -ne 0 ]; then
+ rc_failed $?
+ echo -n '!'
+ fi
+ fi
+ done
+ fi
+}
+
+all_zombies()
+{
+ while read LN; do
+ parseln "$LN"
+ if test $id = 0; then continue; fi
+ if test "$state" != "-b---d" -a "$state" != "-----d"; then
+ return 1;
+ fi
+ done < <(xm list | grep -v '^Name')
+ return 0
+}
+
+# Wait for max $XENDOMAINS_STOP_MAXWAIT for xm $1 to finish;
+# if it has not exited by that time kill it, so the init script will
+# succeed within a finite amount of time; if $2 is nonnull, it will
+# kill the command as well as soon as no domain (except for zombies)
+# are left (used for shutdown --all).
+watchdog_xm()
+{
+ if test -z "$XENDOMAINS_STOP_MAXWAIT" -o "$XENDOMAINS_STOP_MAXWAIT" = "0"; then
+ exit
+ fi
+ usleep 20000
+ for no in `seq 0 $XENDOMAINS_STOP_MAXWAIT`; do
+ # exit if xm save/migrate/shutdown is finished
+ PSAX=`ps axlw | grep "xm $1" | grep -v grep`
+ if test -z "$PSAX"; then exit; fi
+ echo -n "."; sleep 1
+ # go to kill immediately if there's only zombies left
+ if all_zombies && test -n "$2"; then break; fi
+ done
+ sleep 1
+ read PSF PSUID PSPID PSPPID < <(echo "$PSAX")
+ # kill xm $1
+ kill $PSPID >/dev/null 2>&1
}
stop()
{
+ # Collect list of domains to shut down
+ if test "$XENDOMAINS_AUTO_ONLY" = "true"; then
+ rdnames
+ fi
+ echo -n "Shutting down Xen domains:"
+ while read LN; do
+ parseln "$LN"
+ if test $id = 0; then continue; fi
+ echo -n " $name"
+ if test "$XENDOMAINS_AUTO_ONLY" = "true"; then
+ case $name in
+ ($NAMES)
+ # nothing
+ ;;
+ (*)
+ echo -n "(skip)"
+ continue
+ ;;
+ esac
+ fi
+ # XENDOMAINS_SYSRQ chould be something like just "s"
+ # or "s e i u" or even "s e s i u o"
+ # for the latter, you should set XENDOMAINS_USLEEP to 1200000 or so
+ if test -n "$XENDOMAINS_SYSRQ"; then
+ for sysrq in $XENDOMAINS_SYSRQ; do
+ echo -n "(SR-$sysrq)"
+ xm sysrq $id $sysrq
+ if test $? -ne 0; then
+ rc_failed $?
+ echo -n '!'
+ fi
+ # usleep just ignores empty arg
+ usleep $XENDOMAINS_USLEEP
+ done
+ fi
+ if test "$state" = "-b---d" -o "$state" = "-----d"; then
+ echo -n "(zomb)"
+ continue
+ fi
+ if test -n "$XENDOMAINS_MIGRATE"; then
+ echo -n "(migr)"
+ watchdog_xm migrate &
+ WDOG_PID=$!
+ xm migrate $id $XENDOMAINS_MIGRATE
+ if test $? -ne 0; then
+ rc_failed $?
+ echo -n '!'
+ kill $WDOG_PID >/dev/null 2>&1
+ else
+ kill $WDOG_PID >/dev/null 2>&1
+ continue
+ fi
+ fi
+ if test -n "$XENDOMAINS_SAVE"; then
+ echo -n "(save)"
+ watchdog_xm save &
+ WDOG_PID=$!
+ xm save $id $XENDOMAINS_SAVE/$name
+ if test $? -ne 0; then
+ rc_failed $?
+ echo -n '!'
+ kill $WDOG_PIG >/dev/null 2>&1
+ else
+ kill $WDOG_PIG >/dev/null 2>&1
+ continue
+ fi
+ fi
+ if test -n "$XENDOMAINS_SHUTDOWN"; then
+ # XENDOMAINS_SHUTDOWN should be "--halt --wait"
+ echo -n "(shut)"
+ watchdog_xm shutdown &
+ WDOG_PID=$!
+ xm shutdown $id $XENDOMAINS_SHUTDOWN
+ if test $? -ne 0; then
+ rc_failed $?
+ echo -n '!'
+ fi
+ kill $WDOG_PIG >/dev/null 2>&1
+ fi
+ done < <(xm list | grep -v '^Name')
+
# NB. this shuts down ALL Xen domains (politely), not just the ones in
# AUTODIR/*
# This is because it's easier to do ;-) but arguably if this script is run
# on system shutdown then it's also the right thing to do.
-
- echo -n $"Shutting down all Xen domains:"
+ if ! all_zombies && test -n "$XENDOMAINS_SHUTDOWN_ALL"; then
+ # XENDOMAINS_SHUTDOWN_ALL should be "--all --halt --wait"
+ echo -n " SHUTDOWN_ALL "
+ watchdog_xm shutdown 1 &
+ WDOG_PID=$!
+ xm shutdown $XENDOMAINS_SHUTDOWN_ALL
+ if test $? -ne 0; then
+ rc_failed $?
+ echo -n '!'
+ fi
+ kill $WDOG_PID >/dev/null 2>&1
+ fi
- xm shutdown --all --wait --halt
+ # Unconditionally delete lock file
+ rm -f $LOCKFILE
+}
- RETVAL=$?
+check_domain_up()
+{
+ while read LN; do
+ parseln "$LN"
+ if test $id = 0; then continue; fi
+ case $name in
+ ($1)
+ return 0
+ ;;
+ esac
+ done < <(xm list | grep -v "^Name")
+ return 1
+}
- [ $RETVAL -eq 0 ] && rm -f $LOCKFILE
+check_all_auto_domains_up()
+{
+ if test -z "$XENDOMAINS_AUTO" -o ! -d "$XENDOMAINS_AUTO" \
+ -o `/bin/ls $XENDOMAINS_AUTO | wc -l` -eq 0; then return 0; fi
+ missing=
+ for nm in $XENDOMAINS_AUTO/*; do
+ rdname $nm
+ found=0
+ if check_domain_up "$NM"; then
+ echo -n " $name"
+ else
+ missing="$missing $NM"
+ fi
+ done
+ if test -n "$missing"; then
+ echo -n " MISS AUTO:$missing"
+ return 1
+ fi
+ return 0
+}
- on_fn_exit
+check_all_saved_domains_up()
+{
+ if test -z "$XENDOMAINS_SAVE" -o ! -d "$XENDOMAINS_SAVE" \
+ -o `/bin/ls $XENDOMAINS_SAVE | wc -l` -eq 0; then return 0; fi
+ missing=`/bin/ls $XENDOMAINS_SAVE`
+ echo -n " MISS SAVED: " $missing
+ return 1
}
# This does NOT necessarily restart all running domains: instead it
# AUTODIR. If other domains have been started manually then they will
# not get restarted.
# Commented out to avoid confusion!
-#
-#restart()
-#{
-# stop
-# start
-#}
-# same as restart for now - commented out to avoid confusion
-#reload()
-#{
-# restart
-#}
+restart()
+{
+ stop
+ start
+}
+
+reload()
+{
+ restart
+}
case "$1" in
start)
start
+ rc_status
+ if test -f $LOCKFILE; then rc_status -v; fi
;;
stop)
stop
+ rc_status -v
;;
-# The following are commented out to disable them by default to avoid confusion
-# - see the notes above
-#
-# restart)
-# restart
-# ;;
-#
-# reload)
-# reload
-# ;;
+ restart)
+ restart
+ ;;
+ reload)
+ reload
+ ;;
status)
- xm list
+ 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|status}"
+ echo "Usage: $0 {start|stop|restart|reload|status}"
+ rc_failed 3
+ rc_status -v
;;
esac
-exit $RETVAL
+rc_exit
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