libvirt/tools/libvirt-guests.init.sh

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#!/bin/sh
# the following is the LSB init header
#
### BEGIN INIT INFO
# Provides: libvirt-guests
# Required-Start: libvirtd
# Required-Stop: libvirtd
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: suspend/resume libvirt guests on shutdown/boot
# Description: This is a script for suspending active libvirt guests
# on shutdown and resuming them on next boot
# See http://libvirt.org
### END INIT INFO
# the following is chkconfig init header
#
# libvirt-guests: suspend/resume libvirt guests on shutdown/boot
#
# chkconfig: 345 99 01
# description: This is a script for suspending active libvirt guests \
# on shutdown and resuming them on next boot \
# See http://libvirt.org
#
sysconfdir="@sysconfdir@"
localstatedir="@localstatedir@"
libvirtd="@sbindir@"/libvirtd
# Source function library.
test ! -r "$sysconfdir"/rc.d/init.d/functions ||
. "$sysconfdir"/rc.d/init.d/functions
# Source gettext library.
# Make sure this file is recognized as having translations: _("dummy")
. "@bindir@"/gettext.sh
export TEXTDOMAIN="@PACKAGE@" TEXTDOMAINDIR="@localedir@"
URIS=default
ON_BOOT=start
ON_SHUTDOWN=suspend
SHUTDOWN_TIMEOUT=0
test -f "$sysconfdir"/sysconfig/libvirt-guests &&
. "$sysconfdir"/sysconfig/libvirt-guests
LISTFILE="$localstatedir"/lib/libvirt/libvirt-guests
VAR_SUBSYS_LIBVIRT_GUESTS="$localstatedir"/lock/subsys/libvirt-guests
RETVAL=0
retval() {
"$@"
if [ $? -ne 0 ]; then
RETVAL=1
return 1
else
return 0
fi
}
run_virsh() {
uri=$1
shift
if [ "x$uri" = xdefault ]; then
virsh "$@" </dev/null
else
virsh -c "$uri" "$@" </dev/null
fi
}
run_virsh_c() {
( export LC_ALL=C; run_virsh "$@" )
}
list_guests() {
uri=$1
list=$(run_virsh_c "$uri" list)
if [ $? -ne 0 ]; then
RETVAL=1
return 1
fi
uuids=
for id in $(echo "$list" | awk 'NR > 2 {print $1}'); do
uuid=$(run_virsh_c "$uri" dominfo "$id" | awk '/^UUID:/{print $2}')
if [ -z "$uuid" ]; then
RETVAL=1
return 1
fi
uuids="$uuids $uuid"
done
echo $uuids
}
guest_name() {
uri=$1
uuid=$2
name=$(run_virsh_c "$uri" dominfo "$uuid" 2>/dev/null | \
sed -ne 's/^Name: *//p')
[ -n "$name" ] || name=$uuid
echo "$name"
}
guest_is_on() {
uri=$1
uuid=$2
guest_running=false
info=$(run_virsh_c "$uri" dominfo "$uuid")
if [ $? -ne 0 ]; then
RETVAL=1
return 1
fi
id=$(echo "$info" | awk '/^Id:/{print $2}')
[ -n "$id" ] && [ "x$id" != x- ] && guest_running=true
return 0
}
started() {
touch "$VAR_SUBSYS_LIBVIRT_GUESTS"
}
start() {
[ -f "$LISTFILE" ] || { started; return 0; }
if [ "x$ON_BOOT" != xstart ]; then
gettext "libvirt-guests is configured not to start any guests on boot"
echo
rm -f "$LISTFILE"
started
return 0
fi
while read uri list; do
configured=false
set -f
for confuri in $URIS; do
set +f
if [ "x$confuri" = "x$uri" ]; then
configured=true
break
fi
done
set +f
if ! "$configured"; then
eval_gettext "Ignoring guests on \$uri URI"; echo
continue
fi
eval_gettext "Resuming guests on \$uri URI..."; echo
for guest in $list; do
name=$(guest_name "$uri" "$guest")
eval_gettext "Resuming guest \$name: "
if guest_is_on "$uri" "$guest"; then
if "$guest_running"; then
gettext "already active"; echo
else
retval run_virsh "$uri" start "$name" >/dev/null && \
gettext "done"; echo
fi
fi
done
done <"$LISTFILE"
rm -f "$LISTFILE"
started
}
suspend_guest()
{
uri=$1
guest=$2
name=$(guest_name "$uri" "$guest")
label=$(eval_gettext "Suspending \$name: ")
printf %s "$label"
run_virsh "$uri" managedsave "$guest" >/dev/null &
virsh_pid=$!
while true; do
sleep 1
kill -0 "$virsh_pid" >/dev/null 2>&1 || break
progress=$(run_virsh_c "$uri" domjobinfo "$guest" 2>/dev/null | \
awk '/^Data processed:/{print $3, $4}')
if [ -n "$progress" ]; then
printf '\r%s%12s ' "$label" "$progress"
else
printf '\r%s%-12s ' "$label" "..."
fi
done
retval wait "$virsh_pid" && printf '\r%s%-12s\n' "$label" "$(gettext "done")"
}
shutdown_guest()
{
uri=$1
guest=$2
name=$(guest_name "$uri" "$guest")
label=$(eval_gettext "Shutting down \$name: ")
printf %s "$label"
retval run_virsh "$uri" shutdown "$guest" >/dev/null || return
timeout=$SHUTDOWN_TIMEOUT
while [ "$timeout" -gt 0 ]; do
sleep 1
timeout=$((timeout - 1))
guest_is_on "$uri" "$guest" || return
"$guest_running" || break
printf '\r%s%-12d ' "$label" "$timeout"
done
if guest_is_on "$uri" "$guest"; then
if "$guest_running"; then
printf '\r%s%-12s\n' "$label" \
"$(gettext "failed to shutdown in time")"
else
printf '\r%s%-12s\n' "$label" "$(gettext "done")"
fi
fi
}
stop() {
# last stop was not followed by start
[ -f "$LISTFILE" ] && return 0
suspending=true
if [ "x$ON_SHUTDOWN" = xshutdown ]; then
suspending=false
if [ $SHUTDOWN_TIMEOUT -le 0 ]; then
gettext "Shutdown action requested but SHUTDOWN_TIMEOUT was not set"
echo
RETVAL=6
return
fi
fi
: >"$LISTFILE"
set -f
for uri in $URIS; do
set +f
eval_gettext "Running guests on \$uri URI: "
if [ "x$uri" = xdefault ] && [ ! -x "$libvirtd" ]; then
gettext "libvirtd not installed; skipping this URI."; echo
continue
fi
list=$(list_guests "$uri")
if [ $? -eq 0 ]; then
empty=true
for uuid in $list; do
"$empty" || printf ", "
printf %s "$(guest_name "$uri" "$uuid")"
empty=false
done
if "$empty"; then
gettext "no running guests."; echo
else
echo
echo "$uri" "$list" >>"$LISTFILE"
fi
fi
done
set +f
while read uri list; do
if "$suspending"; then
eval_gettext "Suspending guests on \$uri URI..."; echo
else
eval_gettext "Shutting down guests on \$uri URI..."; echo
fi
for guest in $list; do
if "$suspending"; then
suspend_guest "$uri" "$guest"
else
shutdown_guest "$uri" "$guest"
fi
done
done <"$LISTFILE"
rm -f "$VAR_SUBSYS_LIBVIRT_GUESTS"
}
gueststatus() {
set -f
for uri in $URIS; do
set +f
echo "* $uri URI:"
retval run_virsh "$uri" list || echo
done
set +f
}
# rh_status
# Display current status: whether saved state exists, and whether start
# has been executed. We cannot use status() from the functions library,
# since there is no external daemon process matching this init script.
rh_status() {
if [ -f "$LISTFILE" ]; then
gettext "stopped, with saved guests"; echo
RETVAL=3
else
if [ -f "$VAR_SUBSYS_LIBVIRT_GUESTS" ]; then
gettext "started"; echo
else
gettext "stopped, with no saved guests"; echo
fi
RETVAL=0
fi
}
# usage [val]
# Display usage string, then exit with VAL (defaults to 2).
usage() {
program_name=$0
eval_gettext "Usage: \$program_name {start|stop|status|restart|"\
"condrestart|try-restart|reload|force-reload|gueststatus|shutdown}"; echo
exit ${1-2}
}
# See how we were called.
if test $# != 1; then
usage
fi
case "$1" in
--help)
usage 0
;;
start|stop|gueststatus)
"$1"
;;
restart)
stop && start
;;
condrestart|try-restart)
[ -f "$VAR_SUBSYS_LIBVIRT_GUESTS" ] && stop && start
;;
reload|force-reload)
# Nothing to do; we reread configuration on each invocation
;;
status)
rh_status
;;
shutdown)
ON_SHUTDOWN=shutdown
stop
;;
*)
usage
;;
esac
exit $RETVAL