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xen
init.xendomains
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File init.xendomains of Package xen
#!/bin/bash # # xendomains Starts and stops Xen VMs # # chkconfig: 35 99 00 # description: Starts and stops Xen VMs # ### BEGIN INIT INFO # Provides: xendomains # Required-Start: $syslog $remote_fs xend # Should-Start: iscsi o2cb ocfs2 # Required-Stop: $syslog $remote_fs xend # Should-Stop: iscsi # Default-Start: 3 5 # Default-Stop: 0 1 2 6 # Short-Description: Starts and stops Xen VMs # Description: Starts and stops Xen VMs automatically when the # host starts and stops. ### END INIT INFO . /etc/rc.status rc_reset LOCKFILE=/var/lock/subsys/xendomains XENDOM_CONFIG=/etc/sysconfig/xendomains RETCODE_FILE=/tmp/xendomains.rc.$$ xm_cmd=echo . "$XENDOM_CONFIG" shopt -s dotglob nullglob smart_term=1 if [ -z "$esc" ]; then smart_term=0 rc_timer_on() { (trap "exit 0" TERM; sleep $1) & _rc_timer_pid=$! } rc_timer_off() { if [ -n "$_rc_timer_pid" ]; then kill -TERM $_rc_timer_pid > /dev/null 2>&1 fi unset _rc_timer_pid } fi xendomains_abort() { echo -n "xendomains " rc_failed $1 rc_status -v rc_exit } check() { XEND=`pidof -x /usr/sbin/xend` if [ -z "$XEND" ]; then xm_cmd="xl -f" else xm_cmd="xm" fi if [ "$1" = status ]; then if [ ! -e /proc/xen/capabilities ] || [ ! -r "$XENDOM_CONFIG" ] || [ -z "$XEND" ]; then xendomains_abort 3 fi else if [ `id -u` != 0 ]; then xendomains_abort 4 fi if [ ! -e /proc/xen/capabilities ] || [ -z "$XEND" ] || ! grep control_d /proc/xen/capabilities >/dev/null 2>&1; then if [ "$1" = stop ] || [ "$1" = restart ]; then xendomains_abort 0 else xendomains_abort 6 fi fi if [ ! -r "$XENDOM_CONFIG" ]; then xendomains_abort 6 fi fi } dir_contains_something() { [ -d "$1" ] || return 1 local dirfiles=( "$1"/* ) [ ${#dirfiles[@]} != 0 ] } get_name_from_cfg() { if grep -q "^name" "$1";then NM=`grep '^name[ ]*=' "$1" | sed -e 's/^name[ ]*=[ ]*['\''"]\([^'\''"]*\)['\''"].*$/\1/'` elif grep -q "(name " "$1";then NM=`grep '(name ' "$1" | sed -e 's/^ *//' | cut -d " " -f 2 | sed -e 's/)//'` fi } running_auto_names() { unset AUTONAMES[@] if ! dir_contains_something "$XENDOMAINS_AUTO"; then return fi for dom in "$XENDOMAINS_AUTO"/*; do get_name_from_cfg "$dom" AUTONAMES+=("$NM") done } parseln() { name=${1:0:$((${#1}-36))} name=${name%% *} rest="${1: -36}" id=${rest:0:4} id=`echo $id` mem=${rest:4:6} mem=`echo $mem` vcpu=${rest:10:6} vcpu=`echo $vcpu` state=${rest:16:11} state=`echo $state` tm=${rest:27} tm=`echo $tm` } xm_list() { TERM=vt100 ${xm_cmd} list | grep -v '^Name *ID' } is_cfg_running() { get_name_from_cfg "$1" while read LN; do parseln "$LN" [ "$id" = 0 ] && continue if [ "$name" = "$NM" ]; then [ -z "$state" ] && return 1 return 0 fi done < <(xm_list) return 1 } start() { if [ -f "$LOCKFILE" ]; then echo -n "xendomains already running (lockfile exists)" rc_reset rc_status -v return 0 fi local printed=0 if [ "$XENDOMAINS_RESTORE" = "true" ] && dir_contains_something "$XENDOMAINS_SAVE"; then mkdir -p $(dirname "$LOCKFILE") touch "$LOCKFILE" echo "Restoring saved Xen domains" printed=1 for dom in "$XENDOMAINS_SAVE"/*; do echo -n " ${dom##*/}: " ${xm_cmd} restore "$dom" >/dev/null 2>&1 if [ $? -ne 0 ]; then rc_failed else rc_reset rm -f "$dom" fi rc_status -v done fi if dir_contains_something "$XENDOMAINS_AUTO"; then touch "$LOCKFILE" echo "Starting auto Xen domains" printed=1 for dom in "$XENDOMAINS_AUTO"/*; do echo -n " ${dom##*/}: " if is_cfg_running "$dom"; then rc_status -s else if grep -q "^name" "$dom";then ${xm_cmd} create --quiet --defconfig "$dom" elif grep -q "(name .*" "$dom";then ${xm_cmd} create --quiet --config "$dom" fi if [ $? -ne 0 ]; then rc_failed else usleep $XENDOMAINS_CREATE_USLEEP rc_reset fi rc_status -v fi done fi if [ $printed -eq 0 ]; then echo -n "Starting xendomains" rc_failed 6 # not configured rc_status -v fi } is_zombie_state() { [ "$1" = "-b---d" ] || [ "$1" = "-----d" ] } any_non_zombies() { while read LN; do parseln "$LN" [ "$id" = 0 ] && continue [ -z "$state" ] && continue is_zombie_state "$state" || return 0 done < <(xm_list) return 1 } migrate_with_watchdog() { (${xm_cmd} migrate "$@" ; echo $? > "$RETCODE_FILE") >/dev/null 2>&1 & watchdog_xm $! } save_with_watchdog() { (${xm_cmd} save "$@" ; echo $? > "$RETCODE_FILE") >/dev/null 2>&1 & watchdog_xm $! } shutdown_with_watchdog() { (${xm_cmd} shutdown -w "$@" ; echo $? > "$RETCODE_FILE") >/dev/null 2>&1 & watchdog_xm $! } get_return_code() { local RC=127 [ -r "$RETCODE_FILE" ] && RC=`head -c10 "$RETCODE_FILE"` rm -f "$RETCODE_FILE" return $RC } # $1: The PID to wait on. watchdog_xm() { local col=$((COLUMNS-11)) if [ -z "$XENDOMAINS_STOP_MAXWAIT" ] || [ "$XENDOMAINS_STOP_MAXWAIT" = "0" ]; then wait $1 >/dev/null 2>&1 get_return_code return fi rc_timer_on $XENDOMAINS_STOP_MAXWAIT $col while true; do # Prefer "jobs" over "ps": faster and no false positives pid=`jobs -l | grep " $1 Running"` if [ -z "$pid" ]; then break fi pid=`jobs -l | grep " $_rc_timer_pid Running"` if [ -z "$pid" ]; then disown $1 # To avoid the "Terminated..." message kill $1 >/dev/null 2>&1 fi sleep 1 done rc_timer_off if [ $smart_term -ne 0 ]; then echo -en "\015${esc}[${col}C " fi get_return_code } stop() { echo "Shutting down Xen domains" if [ "$XENDOMAINS_AUTO_ONLY" = "true" ]; then running_auto_names fi local printed=0 while read LN; do parseln "$LN" [ "$id" = 0 ] && continue [ -z "$state" ] && continue printed=1 if [ "$XENDOMAINS_AUTO_ONLY" = "true" ]; then is_auto_domain=0 for n in "${AUTONAMES[@]}"; do if [ "$name" = "$n" ]; then is_auto_domain=1 break fi done if [ $is_auto_domain -eq 0 ]; then echo -n " $name: " rc_status -s continue fi fi if [ -n "$XENDOMAINS_SYSRQ" ]; then for sysrq in $XENDOMAINS_SYSRQ; do echo -n " $name: " echo -n "sending sysrq '$sysrq'... " ${xm_cmd} sysrq $id $sysrq if [ $? -ne 0 ]; then rc_failed else rc_reset fi rc_status -v # usleep just ignores empty arg usleep $XENDOMAINS_USLEEP done fi if is_zombie_state "$state"; then echo -n " $name: " echo -n "destroying zombie... " ${xm_cmd} destroy $id rc_reset rc_status -v continue fi if [ -n "$XENDOMAINS_MIGRATE" ]; then echo -n " $name: " echo -n "migrating... " migrate_with_watchdog $id "$XENDOMAINS_MIGRATE" if [ $? -ne 0 ]; then rc_failed rc_status -v else rc_reset rc_status -v continue fi fi if [ -n "$XENDOMAINS_SAVE" ]; then echo -n " $name: " echo -n "saving... " save_with_watchdog $id "$XENDOMAINS_SAVE/$name" if [ $? -ne 0 ]; then rm -f "$XENDOMAINS_SAVE/$name" rc_failed rc_status -v else rc_reset rc_status -v continue fi fi if [ -n "$XENDOMAINS_SHUTDOWN" ]; then echo -n " $name: " echo -n "shutting down... " shutdown_with_watchdog $id $XENDOMAINS_SHUTDOWN if [ $? -ne 0 ]; then rc_failed else rc_reset fi rc_status -v fi done < <(xm_list) if [ -n "$XENDOMAINS_SHUTDOWN_ALL" ] && any_non_zombies ; then echo -n " others: shutting down... " shutdown_with_watchdog $XENDOMAINS_SHUTDOWN_ALL if [ $? -ne 0 ]; then rc_failed else rc_reset fi rc_status -v fi if [ $printed -eq 0 ]; then echo -e "${rc_done_up}" fi # Unconditionally delete lock file rm -f "$LOCKFILE" } check_domain_up() { while read LN; do parseln "$LN" [ "$id" = 0 ] && continue if [ "$name" = "$1" ]; then [ -z "$state" ] && return 1 return 0 fi done < <(xm_list) return 1 } check_all_domains_up() { any_auto=0 any_save=0 dir_contains_something "$XENDOMAINS_AUTO" && any_auto=1 dir_contains_something "$XENDOMAINS_SAVE" && any_save=1 if [ $any_auto -eq 0 ] && [ $any_save -eq 0 ]; then rc_reset rc_status -v return fi echo if [ $any_auto -ne 0 ]; then for nm in "$XENDOMAINS_AUTO"/*; do get_name_from_cfg "$nm" echo -n " $nm: " if check_domain_up "$NM"; then rc_reset else rc_failed 2 fi rc_status -v done fi if [ $any_save -ne 0 ]; then for nm in "$XENDOMAINS_SAVE"/*; do echo -n " $nm: " rc_failed 3 rc_status -v done fi } # This does NOT necessarily restart all running domains: instead it # stops all running domains and then boots all the domains specified in # AUTODIR. If other domains have been started manually then they will # not get restarted. restart() { "$0" stop start } case "$1" in start) check $1 start ;; stop) check $1 stop ;; restart|reload) check $1 restart ;; try-restart) check $1 "$0" status if [ $? = 0 ]; then "$0" restart else rc_reset rc_status -v fi ;; status) check $1 echo -n "Checking status of Xen domains" if [ ! -f "$LOCKFILE" ]; then rc_failed 3 rc_status -v else check_all_domains_up fi ;; *) echo "Usage: $0 {start|stop|restart|try-restart|reload|status}" rc_failed 2 ;; esac rc_exit
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