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https://gitlab.com/libvirt/libvirt.git
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a39dd25715
At the moment, there is no configuration option for the libvirt-guests
service that allows users to define that only persistent virtual machines
should be shutdown on host shutdown.
Currently, the service config allows to choose between two ON_SHUTDOWN
actions that are executed on running virtual machines when the host goes
down: shutdown, suspend.
The ON_SHUTDOWN action should be orthogonal to the type of the virtual
machine. However, the existing implementation, does not suspend
transient virtual machines.
This is the matrix of actions that is executed on virtual machines based
on the configured ON_SHUTDOWN action and the type of a virtual machine.
| persistent | transient
shutdown | shutdown | shutdown (what we want to change)
suspend | suspend | nothing
Add config option PERSISTENT_ONLY to libvirt-guests config that allows
users to define if the ON_SHUTDOWN action should be applied only on
persistent virtual machines. PERSISTENT_ONLY can be set to true, false,
default. The default option will implement the already existing logic.
Case 1: PERSISTENT_ONLY=default
| persistent | transient
shutdown | shutdown | shutdown
suspend | suspend | nothing
Case 2: PERSISTENT_ONLY=true
| persistent | transient
shutdown | shutdown | nothing
suspend | suspend | nothing
Case 3: PERSISTENT_ONLY=false
| persistent | transient
shutdown | shutdown | shutdown
suspend | suspend | suspend
Signed-off-by: Benjamin Taubmann <benjamin.taubmann@nutanix.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
646 lines
17 KiB
Bash
646 lines
17 KiB
Bash
#!/bin/sh
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# Copyright (C) 2011-2014 Red Hat, Inc.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library. If not, see
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# <http://www.gnu.org/licenses/>.
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sysconfdir="@sysconfdir@"
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localstatedir="@localstatedir@"
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initconfdir="@initconfdir@"
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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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SYNC_TIME=0
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PERSISTENT_ONLY="default"
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test -f "$initconfdir"/libvirt-guests &&
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. "$initconfdir"/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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local 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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local uri="$1"
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if run_virsh "$uri" connect 2>/dev/null; then
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return 0;
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else
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eval_gettext "Can't connect to \$uri. Skipping."
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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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local uri="$1"
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local persistent="$2"
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local list="$(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" | sed "/00000000-0000-0000-0000-000000000000/d"
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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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local uri="$1"
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local 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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local uri="$1"
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local uuid="$2"
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local id="$(run_virsh "$uri" domid "$uuid")"
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guest_running="false"
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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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local isfirst="true"
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local bypass=
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local sync_time="false"
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local uri=
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local list=
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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 "$LISTFILE"
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started
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return 0
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fi
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test "x$BYPASS_CACHE" = x0 || bypass="--bypass-cache"
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test "x$SYNC_TIME" = x0 || sync_time="true"
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while read uri list; do
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local configured="false"
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local confuri=
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local guest=
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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 $list; do
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local name="$(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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if "$sync_time"; then
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run_virsh "$uri" domtime --sync "$name" >/dev/null
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fi
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fi
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done
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done <"$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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local uri="$1"
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local guest="$2"
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local name="$(guest_name "$uri" "$guest")"
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local label="$(eval_gettext "Suspending \$name: ")"
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local bypass=
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local slept=0
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test "x$BYPASS_CACHE" = x0 || bypass="--bypass-cache"
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printf '%s...\n' "$label"
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run_virsh "$uri" managedsave $bypass "$guest" >/dev/null &
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local 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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slept=$(($slept + 1))
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if [ $(($slept % 5)) -eq 0 ]; then
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local 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 '%s%s\n' "$label" "$progress"
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else
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printf '%s%s\n' "$label" "..."
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fi
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fi
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done
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retval wait "$virsh_pid" && printf '%s%s\n' "$label" "$(gettext "done")"
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}
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# shutdown_guest URI GUEST
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# Start an ACPI shutdown of GUEST on URI. This function returns after the guest
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# was successfully shutdown or the timeout defined by $SHUTDOWN_TIMEOUT expired.
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shutdown_guest()
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{
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local uri="$1"
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local guest="$2"
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local name="$(guest_name "$uri" "$guest")"
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local timeout="$SHUTDOWN_TIMEOUT"
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local check_timeout="false"
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local format=
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local slept=
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eval_gettext "Starting shutdown on guest: \$name"
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echo
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retval run_virsh "$uri" shutdown "$guest" >/dev/null || return
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if [ $timeout -gt 0 ]; then
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check_timeout="true"
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format="$(eval_gettext "Waiting for guest %s to shut down, %d seconds left\n")"
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else
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slept=0
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format="$(eval_gettext "Waiting for guest %s to shut down\n")"
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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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if [ $(($timeout % 5)) -eq 0 ]; then
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printf "$format" "$name" "$timeout"
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fi
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timeout=$(($timeout - 1))
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else
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slept=$(($slept + 1))
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if [ $(($slept % 5)) -eq 0 ]; then
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printf "$format" "$name"
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fi
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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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eval_gettext "Shutdown of guest \$name failed to complete in time."
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else
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eval_gettext "Shutdown of guest \$name complete."
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fi
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echo
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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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local uri="$1"
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local guest="$2"
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local name="$(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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# Result is returned in "guests_shutting_down"
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check_guests_shutdown()
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{
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local uri="$1"
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local guests_to_check="$2"
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local guest=
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guests_shutting_down=
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for guest in $guests_to_check; do
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if ! guest_is_on "$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_shutting_down="$guests_shutting_down $guest"
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fi
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done
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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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local uri="$1"
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local before="$2"
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local after="$3"
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local guest=
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for guest in $before; do
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case " $after " in
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*" $guest "*) continue;;
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esac
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local name="$(guest_name "$uri" "$guest")"
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if [ -n "$name" ]; then
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eval_gettext "Shutdown of guest \$name complete."
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echo
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fi
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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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local uri="$1"
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local guests="$2"
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local on_shutdown=
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local check_timeout="false"
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local timeout="$SHUTDOWN_TIMEOUT"
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local slept=
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local format=
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if [ $timeout -gt 0 ]; then
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check_timeout="true"
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format="$(eval_gettext "Waiting for %d guests to shut down, %d seconds left\n")"
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else
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slept=0
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format="$(eval_gettext "Waiting for %d guests to shut down\n")"
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fi
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while [ -n "$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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local guest="$1"
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shift
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guests="$*"
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if [ -z "$(echo $on_shutdown | grep $guest)" ] &&
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[ -n "$(guest_name "$uri" "$guest")" ]; then
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shutdown_guest_async "$uri" "$guest"
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on_shutdown="$on_shutdown $guest"
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fi
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done
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sleep 1
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set -- $guests
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local guestcount=$#
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set -- $on_shutdown
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local shutdowncount=$#
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if $check_timeout; then
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if [ $(($timeout % 5)) -eq 0 ]; then
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printf "$format" $(($guestcount + $shutdowncount)) "$timeout"
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fi
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timeout=$(($timeout - 1))
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if [ $timeout -le 0 ]; then
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eval_gettext "Timeout expired while shutting down domains"; echo
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RETVAL=1
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return
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fi
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else
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slept=$(($slept + 1))
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if [ $(($slept % 5)) -eq 0 ]; then
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printf "$format" $(($guestcount + $shutdowncount))
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fi
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fi
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local on_shutdown_prev="$on_shutdown"
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check_guests_shutdown "$uri" "$on_shutdown"
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on_shutdown="$guests_shutting_down"
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print_guests_shutdown "$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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local uri=
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local action="suspend"
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local persistent_only="default"
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# last stop was not followed by start
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[ -f "$LISTFILE" ] && return 0
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if [ "x$ON_SHUTDOWN" = xshutdown ]; then
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action="shutdown"
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if [ $SHUTDOWN_TIMEOUT -lt 0 ]; then
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gettext "SHUTDOWN_TIMEOUT must be equal or greater than 0"
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echo
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RETVAL=6
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return
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fi
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fi
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case "x$PERSISTENT_ONLY" in
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xtrue)
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persistent_only="true"
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;;
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xfalse)
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persistent_only="false"
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;;
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*)
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if [ "x$action" = xshutdown ]; then
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persistent_only="false"
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elif [ "x$action" = xsuspend ]; then
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persistent_only="true"
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fi
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;;
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esac
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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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local list="$(list_guests "$uri")"
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if [ $? -eq 0 ]; then
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local 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 "$persistent_only"; then
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local transient="$(list_guests "$uri" "--transient")"
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if [ $? -eq 0 ]; then
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local empty="true"
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local uuid=
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for uuid in $transient; do
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if "$empty"; then
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if [ "x$action" = xsuspend ]; then
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eval_gettext "Not suspending transient guests on URI: \$uri: "
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else
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eval_gettext "Not shutting down transient guests on URI: \$uri: "
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fi
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empty="false"
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else
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printf ", "
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fi
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printf %s "$(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
|
|
echo "$uri" $list >>"$LISTFILE"
|
|
fi
|
|
done
|
|
set +f
|
|
|
|
if [ -s "$LISTFILE" ]; then
|
|
while read uri list; do
|
|
if [ "x$action" = xsuspend ]; then
|
|
eval_gettext "Suspending guests on \$uri URI..."; echo
|
|
else
|
|
eval_gettext "Shutting down guests on \$uri URI..."; echo
|
|
fi
|
|
|
|
if [ "$PARALLEL_SHUTDOWN" -gt 1 ] &&
|
|
[ "x$action" = xshutdown ]; then
|
|
shutdown_guests_parallel "$uri" "$list"
|
|
else
|
|
local guest=
|
|
for guest in $list; do
|
|
if [ "x$action" = xsuspend ]; then
|
|
suspend_guest "$uri" "$guest"
|
|
else
|
|
shutdown_guest "$uri" "$guest"
|
|
fi
|
|
done
|
|
fi
|
|
done <"$LISTFILE"
|
|
else
|
|
rm -f "$LISTFILE"
|
|
fi
|
|
|
|
rm -f "$VAR_SUBSYS_LIBVIRT_GUESTS"
|
|
}
|
|
|
|
# gueststatus
|
|
# List status of guests
|
|
gueststatus() {
|
|
local uri=
|
|
set -f
|
|
for uri in $URIS; do
|
|
set +f
|
|
echo "* $uri URI:"
|
|
retval run_virsh "$uri" list | grep -v "Domain-0" || 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
|
|
RETVAL=0
|
|
else
|
|
gettext "stopped, with no saved guests"; echo
|
|
RETVAL=3
|
|
fi
|
|
fi
|
|
}
|
|
|
|
# usage [val]
|
|
# Display usage string, then exit with VAL (defaults to 2).
|
|
usage() {
|
|
local 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
|