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https://gitlab.com/libvirt/libvirt.git
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Init script for handling guests on shutdown/boot
Example output during shutdown: Running guests on default URI: console, rhel6-1, rhel5-64 Running guests on lxc:/// URI: lxc-shell Running guests on xen:/// URI: error: no hypervisor driver available for xen:/// error: failed to connect to the hypervisor Running guests on vbox+tcp://orkuz/system URI: no running guests. Suspending guests on default URI... Suspending console: done Suspending rhel6-1: done Suspending rhel5-64: done Suspending guests on lxc:/// URI... Suspending lxc-shell: error: Failed to save domain 9cba8bfb-56f4-6589-2d12-8a58c886dd3b state error: this function is not supported by the hypervisor: virDomainManagedSave Note, the "Suspending $guest: " shows progress during the suspend phase if domjobinfo gives meaningful output. Example output during boot: Resuming guests on default URI... Resuming guest rhel6-1: done Resuming guest rhel5-64: done Resuming guest console: done Resuming guests on lxc:/// URI... Resuming guest lxc-shell: already active Configuration used for generating the examples above: URIS='default lxc:/// xen:/// vbox+tcp://orkuz/system' The script uses /var/lib/libvirt/libvirt-guests files to note all active guest it should try to resume on next boot. It's content looks like: default 7f8b9d93-30e1-f0b9-47a7-cb408482654b 085b4c95-5da2-e8e1-712f-6ea6a4156af2 fb4d8360-5305-df3a-2da1-07d682891b8c lxc:/// 9cba8bfb-56f4-6589-2d12-8a58c886dd3b
This commit is contained in:
Jiri Denemark
parent
e0037c2ee8
commit
66823690e4
@ -30,6 +30,8 @@ EXTRA_DIST = \
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libvirtd.uml.logrotate.in \
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test_libvirtd.aug \
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THREADING.txt \
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libvirt-guests.init.in \
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libvirt-guests.sysconf \
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$(AVAHI_SOURCES) \
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$(DAEMON_SOURCES)
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@ -217,21 +219,27 @@ install-logrotate: $(LOGROTATE_CONFS)
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$(INSTALL_DATA) libvirtd.uml.logrotate $(DESTDIR)$(sysconfdir)/logrotate.d/libvirtd.uml
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if LIBVIRT_INIT_SCRIPT_RED_HAT
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install-init: libvirtd.init
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install-init: libvirtd.init libvirt-guests.init
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mkdir -p $(DESTDIR)$(sysconfdir)/rc.d/init.d
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$(INSTALL_SCRIPT) libvirtd.init \
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$(DESTDIR)$(sysconfdir)/rc.d/init.d/libvirtd
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$(INSTALL_SCRIPT) libvirt-guests.init \
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$(DESTDIR)$(sysconfdir)/rc.d/init.d/libvirt-guests
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mkdir -p $(DESTDIR)$(sysconfdir)/sysconfig
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$(INSTALL_SCRIPT) $(srcdir)/libvirtd.sysconf \
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$(DESTDIR)$(sysconfdir)/sysconfig/libvirtd
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$(INSTALL_SCRIPT) $(srcdir)/libvirt-guests.sysconf \
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$(DESTDIR)$(sysconfdir)/sysconfig/libvirt-guests
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uninstall-init:
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rm -f $(DESTDIR)$(sysconfdir)/rc.d/init.d/libvirtd \
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$(DESTDIR)$(sysconfdir)/sysconfig/libvirtd
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$(DESTDIR)$(sysconfdir)/sysconfig/libvirtd \
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$(DESTDIR)$(sysconfdir)/rc.d/init.d/libvirt-guests \
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$(DESTDIR)$(sysconfdir)/sysconfig/libvirt-guests
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BUILT_SOURCES += libvirtd.init
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BUILT_SOURCES += libvirtd.init libvirt-guests.init
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libvirtd.init: libvirtd.init.in
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%.init: %.init.in
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$(AM_V_GEN)sed \
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-e s!\@localstatedir\@!@localstatedir@!g \
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-e s!\@sbindir\@!@sbindir@!g \
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295
daemon/libvirt-guests.init.in
Normal file
295
daemon/libvirt-guests.init.in
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@ -0,0 +1,295 @@
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#!/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: 3 4 5
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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 98 02
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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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# Source function library.
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. "$sysconfdir"/rc.d/init.d/functions
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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=0
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test -f "$sysconfdir"/sysconfig/libvirt-guests && . "$sysconfdir"/sysconfig/libvirt-guests
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LISTFILE="$localstatedir"/lib/libvirt/libvirt-guests
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RETVAL=0
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retval() {
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"$@"
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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() {
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uri=$1
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shift
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if [ "x$uri" = xdefault ]; then
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conn=
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else
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conn="-c $uri"
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fi
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virsh $conn "$@"
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}
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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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list_guests() {
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uri=$1
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list=$(run_virsh_c $uri list)
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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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uuids=
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for id in $(echo "$list" | awk 'NR > 2 {print $1}'); do
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uuid=$(run_virsh_c $uri dominfo $id | awk '/^UUID:/{print $2}')
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if [ -z "$uuid" ]; then
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RETVAL=1
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return 1
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fi
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uuids="$uuids $uuid"
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done
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echo $uuids
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}
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guest_name() {
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uri=$1
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uuid=$2
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name=$(run_virsh_c $uri dominfo $uuid 2>/dev/null | \
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awk '/^Name:/{print $2}')
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[ -n "$name" ] || name=$uuid
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echo "$name"
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}
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guest_is_on() {
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uri=$1
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uuid=$2
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guest_running=false
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info=$(run_virsh_c $uri dominfo $uuid)
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if [ $? -ne 0 ]; then
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RETVAL=1
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return 1
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fi
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id=$(echo "$info" | awk '/^Id:/{print $2}')
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[ -n "$id" ] && [ "x$id" != x- ] && guest_running=true
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return 0
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}
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start() {
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[ -f $LISTFILE ] || return 0
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if [ "x$ON_BOOT" != xstart ]; then
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echo $"libvirt-guests is configured not to start any guests on boot"
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rm -f $LISTFILE
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return 0
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fi
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while read uri list; do
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configured=false
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for confuri in $URIS; do
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if [ $confuri = $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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if ! $configured; then
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echo $"Ignoring guests on $uri URI"
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continue
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fi
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echo $"Resuming guests on $uri URI..."
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for guest in $list; do
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name=$(guest_name $uri $guest)
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echo -n $"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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echo $"already active"
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else
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retval run_virsh $uri start "$name" >/dev/null && \
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echo $"done"
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fi
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fi
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done
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done <$LISTFILE
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rm -f $LISTFILE
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}
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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 $guest)
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label=$"Suspending $name: "
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echo -n "$label"
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run_virsh $uri managedsave $guest >/dev/null &
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virsh_pid=$!
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while true; do
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sleep 1
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kill -0 $virsh_pid >&/dev/null || break
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progress=$(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" $"done"
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}
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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 $guest)
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label=$"Shutting down $name: "
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echo -n "$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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while [ $timeout -gt 0 ]; do
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sleep 1
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timeout=$[timeout - 1]
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guest_is_on $uri $guest || return
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$guest_running || break
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printf '\r%s%-12d ' "$label" $timeout
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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" $"failed to shutdown in time"
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else
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printf '\r%s%-12s\n' "$label" $"done"
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fi
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fi
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}
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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 -le 0 ]; then
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echo $"Shutdown action requested but SHUTDOWN_TIMEOUT was not set"
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RETVAL=6
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return
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fi
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fi
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: >$LISTFILE
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for uri in $URIS; do
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echo -n $"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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echo -n $(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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echo $"no running guests."
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else
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echo
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echo $uri $list >>$LISTFILE
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fi
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fi
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done
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while read uri list; do
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if $suspending; then
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echo $"Suspending guests on $uri URI..."
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else
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echo $"Shutting down guests on $uri URI..."
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fi
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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 $guest
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fi
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done
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done <$LISTFILE
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}
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gueststatus() {
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for uri in $URIS; do
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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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}
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# See how we were called.
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case "$1" in
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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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force-reload)
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;;
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status)
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if [ -f $LISTFILE ]; then
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RETVAL=3
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else
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RETVAL=0
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fi
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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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echo $"Usage: $0 {start|stop|restart|force-reload|gueststatus|shutdown}"
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exit 3
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;;
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esac
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exit $RETVAL
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24
daemon/libvirt-guests.sysconf
Normal file
24
daemon/libvirt-guests.sysconf
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@ -0,0 +1,24 @@
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# URIs to check for running guests
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# example: URIS='default xen:/// vbox+tcp://host/system lxc:///'
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#URIS=default
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# action taken on host boot
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# - start all guests which were running on shutdown are started on boot
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# regardless on their autostart settings
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# - ignore libvirt-guests init script won't start any guest on boot, however,
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# guests marked as autostart will still be automatically started by
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# libvirtd
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#ON_BOOT=start
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# action taken on host shutdown
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# - suspend all running guests are suspended using virsh managedsave
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# - shutdown all running guests are asked to shutdown. Please be careful with
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# this settings since there is no way to distinguish between a
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# guest which is stuck or ignores shutdown requests and a guest
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# which just needs a long time to shutdown. When setting
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# ON_SHUTDOWN=shutdown, you must also set SHUTDOWN_TIMEOUT to a
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# value suitable for your guests.
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#ON_SHUTDOWN=suspend
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# number of seconds we're willing to wait for a guest to shut down
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#SHUTDOWN_TIMEOUT=0
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@ -830,6 +830,10 @@ fi
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%{_datadir}/libvirt/cpu_map.xml
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%{_sysconfdir}/rc.d/init.d/libvirt-guests
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%config(noreplace) %{_sysconfdir}/sysconfig/libvirt-guests
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%dir %attr(0700, root, root) %{_localstatedir}/lib/libvirt
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%if %{with_sasl}
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%config(noreplace) %{_sysconfdir}/sasl2/libvirt.conf
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%endif
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