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c086af6b9b
$LISTFILE is created even no domain is running, and the empty
$LISTFILE could cause improper service status.
stopped ,with saved guests
Which is not right, as there is no domain was saved.
563 lines
14 KiB
Bash
563 lines
14 KiB
Bash
#!/bin/sh
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# the following is the LSB init header
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#
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### BEGIN INIT INFO
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# Provides: libvirt-guests
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# Required-Start: libvirtd
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# Required-Stop: libvirtd
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Short-Description: suspend/resume libvirt guests on shutdown/boot
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# Description: This is a script for suspending active libvirt guests
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# on shutdown and resuming them on next boot
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# See http://libvirt.org
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### END INIT INFO
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# the following is chkconfig init header
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#
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# libvirt-guests: suspend/resume libvirt guests on shutdown/boot
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#
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# chkconfig: 345 99 01
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# description: This is a script for suspending active libvirt guests \
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# on shutdown and resuming them on next boot \
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# See http://libvirt.org
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#
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sysconfdir="@sysconfdir@"
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localstatedir="@localstatedir@"
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libvirtd="@sbindir@"/libvirtd
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# Source function library.
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test ! -r "$sysconfdir"/rc.d/init.d/functions ||
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. "$sysconfdir"/rc.d/init.d/functions
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# Source gettext library.
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# Make sure this file is recognized as having translations: _("dummy")
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. "@bindir@"/gettext.sh
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export TEXTDOMAIN="@PACKAGE@" TEXTDOMAINDIR="@localedir@"
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URIS=default
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ON_BOOT=start
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ON_SHUTDOWN=suspend
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SHUTDOWN_TIMEOUT=300
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PARALLEL_SHUTDOWN=0
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START_DELAY=0
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BYPASS_CACHE=0
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test -f "$sysconfdir"/sysconfig/libvirt-guests &&
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. "$sysconfdir"/sysconfig/libvirt-guests
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LISTFILE="$localstatedir"/lib/libvirt/libvirt-guests
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VAR_SUBSYS_LIBVIRT_GUESTS="$localstatedir"/lock/subsys/libvirt-guests
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RETVAL=0
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# retval COMMAND ARGUMENTS...
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# run command with arguments and convert non-zero return value to 1 and set
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# the global return variable
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retval() {
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"$@"
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if [ $? -ne 0 ]; then
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RETVAL=1
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return 1
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else
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return 0
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fi
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}
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# run_virsh URI ARGUMENTS...
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# start virsh and let it execute ARGUMENTS on URI
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# If URI is "default" virsh is called without the "-c" argument
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# (using libvirt's default connection)
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run_virsh() {
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uri=$1
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shift
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if [ "x$uri" = xdefault ]; then
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virsh "$@" </dev/null
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else
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virsh -c "$uri" "$@" </dev/null
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fi
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}
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# run_virsh_c URI ARGUMENTS
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# Same as "run_virsh" but the "C" locale is used instead of
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# the system's locale.
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run_virsh_c() {
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( export LC_ALL=C; run_virsh "$@" )
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}
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# test_connect URI
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# check if URI is reachable
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test_connect()
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{
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uri=$1
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run_virsh "$uri" connect 2>/dev/null
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if [ $? -ne 0 ]; then
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eval_gettext "Can't connect to \$uri. Skipping."
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echo
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return 1
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fi
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}
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# list_guests URI PERSISTENT
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# List running guests on URI.
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# PERSISTENT argument options:
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# --persistent: list only persistent guests
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# --transient: list only transient guests
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# [none]: list both persistent and transient guests
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list_guests() {
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uri=$1
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persistent=$2
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list=$(run_virsh_c "$uri" list --uuid $persistent)
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if [ $? -ne 0 ]; then
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RETVAL=1
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return 1
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fi
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echo $list
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}
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# guest_name URI UUID
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# return name of guest UUID on URI
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guest_name() {
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uri=$1
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uuid=$2
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run_virsh "$uri" domname "$uuid" 2>/dev/null
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}
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# guest_is_on URI UUID
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# check if guest UUID on URI is running
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# Result is returned by variable "guest_running"
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guest_is_on() {
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uri=$1
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uuid=$2
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guest_running=false
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id=$(run_virsh "$uri" domid "$uuid")
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if [ $? -ne 0 ]; then
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RETVAL=1
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return 1
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fi
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[ -n "$id" ] && [ "x$id" != x- ] && guest_running=true
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return 0
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}
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# started
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# Create the startup lock file
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started() {
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touch "$VAR_SUBSYS_LIBVIRT_GUESTS"
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}
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# start
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# Start or resume the guests
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start() {
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[ -f "$LISTFILE" ] || { started; return 0; }
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if [ "x$ON_BOOT" != xstart ]; then
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gettext "libvirt-guests is configured not to start any guests on boot"
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echo
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rm -f "$LISTFILE"
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started
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return 0
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fi
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isfirst=true
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bypass=
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test "x$BYPASS_CACHE" = x0 || bypass=--bypass-cache
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while read uri list; do
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configured=false
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set -f
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for confuri in $URIS; do
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set +f
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if [ "x$confuri" = "x$uri" ]; then
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configured=true
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break
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fi
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done
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set +f
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if ! "$configured"; then
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eval_gettext "Ignoring guests on \$uri URI"; echo
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continue
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fi
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test_connect "$uri" || continue
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eval_gettext "Resuming guests on \$uri URI..."; echo
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for guest in $list; do
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name=$(guest_name "$uri" "$guest")
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eval_gettext "Resuming guest \$name: "
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if guest_is_on "$uri" "$guest"; then
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if "$guest_running"; then
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gettext "already active"; echo
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else
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if "$isfirst"; then
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isfirst=false
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else
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sleep $START_DELAY
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fi
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retval run_virsh "$uri" start $bypass "$name" \
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>/dev/null && \
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gettext "done"; echo
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fi
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fi
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done
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done <"$LISTFILE"
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rm -f "$LISTFILE"
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started
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}
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# suspend_guest URI GUEST
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# Do a managed save on a GUEST on URI. This function returns after the guest
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# was saved.
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suspend_guest()
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{
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uri=$1
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guest=$2
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name=$(guest_name "$uri" "$guest")
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label=$(eval_gettext "Suspending \$name: ")
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bypass=
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test "x$BYPASS_CACHE" = x0 || bypass=--bypass-cache
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printf %s "$label"
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run_virsh "$uri" managedsave $bypass "$guest" >/dev/null &
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virsh_pid=$!
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while true; do
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sleep 1
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kill -0 "$virsh_pid" >/dev/null 2>&1 || break
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progress=$(run_virsh_c "$uri" domjobinfo "$guest" 2>/dev/null | \
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awk '/^Data processed:/{print $3, $4}')
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if [ -n "$progress" ]; then
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printf '\r%s%12s ' "$label" "$progress"
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else
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printf '\r%s%-12s ' "$label" "..."
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fi
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done
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retval wait "$virsh_pid" && printf '\r%s%-12s\n' "$label" "$(gettext "done")"
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}
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# shutdown_guest URI GUEST
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# Start a ACPI shutdown of GUEST on URI. This function return after the quest
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# was successfully shutdown or the timeout defined by $SHUTDOWN_TIMEOUT expires.
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shutdown_guest()
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{
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uri=$1
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guest=$2
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name=$(guest_name "$uri" "$guest")
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label=$(eval_gettext "Shutting down \$name: ")
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printf %s "$label"
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retval run_virsh "$uri" shutdown "$guest" >/dev/null || return
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timeout=$SHUTDOWN_TIMEOUT
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check_timeout=false
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if [ $timeout -gt 0 ]; then
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check_timeout=true
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fi
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while ! $check_timeout || [ "$timeout" -gt 0 ]; do
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sleep 1
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guest_is_on "$uri" "$guest" || return
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"$guest_running" || break
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if $check_timeout; then
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timeout=$((timeout - 1))
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printf '\r%s%-12d ' "$label" "$timeout"
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fi
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done
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if guest_is_on "$uri" "$guest"; then
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if "$guest_running"; then
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printf '\r%s%-12s\n' "$label" \
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"$(gettext "failed to shutdown in time")"
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else
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printf '\r%s%-12s\n' "$label" "$(gettext "done")"
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fi
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fi
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}
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# shutdown_guest_async URI GUEST
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# Start a ACPI shutdown of GUEST on URI. This function returns after the command
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# was issued to libvirt to allow parallel shutdown.
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shutdown_guest_async()
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{
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uri=$1
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guest=$2
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name=$(guest_name "$uri" "$guest")
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eval_gettext "Starting shutdown on guest: \$name"
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echo
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retval run_virsh "$uri" shutdown "$guest" > /dev/null
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}
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# guest_count GUEST_LIST
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# Returns number of guests in GUEST_LIST
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guest_count()
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{
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set -- $1
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echo $#
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}
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# check_guests_shutdown URI GUESTS
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# check if shutdown is complete on guests in "GUESTS" and returns only
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# guests that are still shutting down
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check_guests_shutdown()
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{
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uri=$1
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guests=$2
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guests_up=
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for guest in $guests; do
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if ! guest_is_on "$uri" "$guest" >/dev/null 2>&1; then
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eval_gettext "Failed to determine state of guest: \$guest. Not tracking it anymore."
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echo
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continue
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fi
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if "$guest_running"; then
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guests_up="$guests_up $guest"
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fi
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done
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echo "$guests_up"
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}
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# print_guests_shutdown URI BEFORE AFTER
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# Checks for differences in the lists BEFORE and AFTER and prints
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# a shutdown complete notice for guests that have finished
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print_guests_shutdown()
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{
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uri=$1
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before=$2
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after=$3
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for guest in $before; do
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case " $after " in
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*" $guest "*) continue;;
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esac
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name=$(guest_name "$uri" "$guest")
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eval_gettext "Shutdown of guest \$name complete."
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echo
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done
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}
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# shutdown_guests_parallel URI GUESTS
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# Shutdown guests GUESTS on machine URI in parallel
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shutdown_guests_parallel()
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{
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uri=$1
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guests=$2
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on_shutdown=
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check_timeout=false
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timeout=$SHUTDOWN_TIMEOUT
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if [ $timeout -gt 0 ]; then
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check_timeout=true
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fi
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while [ -n "$on_shutdown" ] || [ -n "$guests" ]; do
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while [ -n "$guests" ] &&
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[ $(guest_count "$on_shutdown") -lt "$PARALLEL_SHUTDOWN" ]; do
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set -- $guests
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guest=$1
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shift
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guests=$*
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shutdown_guest_async "$uri" "$guest"
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on_shutdown="$on_shutdown $guest"
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done
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sleep 1
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if $check_timeout; then
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timeout=$(($timeout - 1))
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if [ $timeout -le 0 ]; then
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eval_gettext "Timeout expired while shutting down domains"; echo
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RETVAL=1
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return
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fi
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fi
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on_shutdown_prev=$on_shutdown
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on_shutdown=$(check_guests_shutdown "$uri" "$on_shutdown")
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print_guests_shutdown "$uri" "$on_shutdown_prev" "$on_shutdown"
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done
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}
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# stop
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# Shutdown or save guests on the configured uris
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stop() {
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# last stop was not followed by start
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[ -f "$LISTFILE" ] && return 0
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suspending=true
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if [ "x$ON_SHUTDOWN" = xshutdown ]; then
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suspending=false
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if [ $SHUTDOWN_TIMEOUT -lt 0 ]; then
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gettext "SHUTDOWN_TIMEOUT must be equal or greater than 0"
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echo
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RETVAL=6
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return
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fi
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fi
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: >"$LISTFILE"
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set -f
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for uri in $URIS; do
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set +f
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test_connect "$uri" || continue
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eval_gettext "Running guests on \$uri URI: "
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list=$(list_guests "$uri")
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if [ $? -eq 0 ]; then
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empty=true
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for uuid in $list; do
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"$empty" || printf ", "
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printf %s "$(guest_name "$uri" "$uuid")"
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empty=false
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done
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if "$empty"; then
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gettext "no running guests."
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fi
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echo
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fi
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if "$suspending"; then
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transient=$(list_guests "$uri" "--transient")
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if [ $? -eq 0 ]; then
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empty=true
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for uuid in $transient; do
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if "$empty"; then
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eval_gettext "Not suspending transient guests on URI: \$uri: "
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empty=false
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else
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printf ", "
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fi
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printf %s "$(guest_name "$uri" "$uuid")"
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done
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echo
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# reload domain list to contain only persistent guests
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list=$(list_guests "$uri" "--persistent")
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if [ $? -ne 0 ]; then
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eval_gettext "Failed to list persistent guests on \$uri"
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echo
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RETVAL=1
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set +f
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return
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fi
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else
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gettext "Failed to list transient guests"
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echo
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RETVAL=1
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set +f
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return
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fi
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fi
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if [ -n "$list" ]; then
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echo "$uri" "$list" >>"$LISTFILE"
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fi
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done
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set +f
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if [ -s "$LISTFILE" ]; then
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while read uri list; do
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if "$suspending"; then
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eval_gettext "Suspending guests on \$uri URI..."; echo
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else
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eval_gettext "Shutting down guests on \$uri URI..."; echo
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fi
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if [ "$PARALLEL_SHUTDOWN" -gt 1 ] &&
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! "$suspending"; then
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shutdown_guests_parallel "$uri" "$list"
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else
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for guest in $list; do
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if "$suspending"; then
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suspend_guest "$uri" "$guest"
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else
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shutdown_guest "$uri" "$guest"
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fi
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done
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fi
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done <"$LISTFILE"
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else
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rm -f "$LISTFILE"
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fi
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rm -f "$VAR_SUBSYS_LIBVIRT_GUESTS"
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}
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# gueststatus
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# List status of guests
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gueststatus() {
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set -f
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for uri in $URIS; do
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set +f
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echo "* $uri URI:"
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retval run_virsh "$uri" list || echo
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done
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set +f
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}
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# rh_status
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# Display current status: whether saved state exists, and whether start
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# has been executed. We cannot use status() from the functions library,
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# since there is no external daemon process matching this init script.
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rh_status() {
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if [ -f "$LISTFILE" ]; then
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gettext "stopped, with saved guests"; echo
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RETVAL=3
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else
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if [ -f "$VAR_SUBSYS_LIBVIRT_GUESTS" ]; then
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gettext "started"; echo
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else
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gettext "stopped, with no saved guests"; echo
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fi
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RETVAL=0
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fi
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}
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# usage [val]
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# Display usage string, then exit with VAL (defaults to 2).
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usage() {
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program_name=$0
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eval_gettext "Usage: \$program_name {start|stop|status|restart|"\
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"condrestart|try-restart|reload|force-reload|gueststatus|shutdown}"; echo
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exit ${1-2}
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}
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# See how we were called.
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if test $# != 1; then
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usage
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fi
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case "$1" in
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--help)
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usage 0
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;;
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start|stop|gueststatus)
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"$1"
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;;
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restart)
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stop && start
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;;
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condrestart|try-restart)
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[ -f "$VAR_SUBSYS_LIBVIRT_GUESTS" ] && stop && start
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;;
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reload|force-reload)
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# Nothing to do; we reread configuration on each invocation
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;;
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status)
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rh_status
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;;
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shutdown)
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ON_SHUTDOWN=shutdown
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stop
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;;
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*)
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usage
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;;
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esac
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exit $RETVAL
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