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Extend libvirt-guests to shutdown only persistent VMs
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>
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@ -113,6 +113,28 @@ The following variables are supported:
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this requires guest agent with support for time synchronization
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running in the guest. By default, this functionality is turned off.
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- PERSISTENT_ONLY=default
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Defines what type of guest virtual machine ON_SHUTDOWN action is applied to
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* default
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This implements the already existing default behavior.
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If ON_SHUTDOWN action is shutdown, transient and persistent guest virtual
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machines are asked to shutdown.
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If ON_SHUTDOWN action is suspend, only persistent guest virtual machines
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are asked to suspend.
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* true
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ON_SHUTDOWN action is executed only on persistent guest virtual machines.
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Transient guest virtual machines are not affected.
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* false
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ON_SHUTDOWN action is executed on persistent and transient guest virtual
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machines.
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BUGS
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====
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@ -38,6 +38,7 @@ 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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@ -438,14 +439,16 @@ shutdown_guests_parallel()
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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 suspending="true"
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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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suspending="false"
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action="shutdown"
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if [ $SHUTDOWN_TIMEOUT -lt 0 ]; then
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gettext "SHUTDOWN_TIMEOUT must be equal or greater than 0"
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echo
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@ -454,6 +457,22 @@ stop() {
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fi
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fi
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case "x$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 $URIS; do
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@ -478,7 +497,7 @@ stop() {
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echo
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fi
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if "$suspending"; then
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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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@ -486,7 +505,11 @@ stop() {
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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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if [ "x$action" = xsuspend ]; then
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eval_gettext "Not suspending transient guests on URI: \$uri: "
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else
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eval_gettext "Not shutting down transient guests on URI: \$uri: "
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fi
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empty="false"
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else
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printf ", "
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@ -520,19 +543,19 @@ stop() {
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if [ -s "$LISTFILE" ]; then
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while read uri list; do
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if "$suspending"; then
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if [ "x$action" = xsuspend ]; 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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[ "x$action" = xshutdown ]; then
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shutdown_guests_parallel "$uri" "$list"
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else
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local guest=
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for guest in $list; do
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if "$suspending"; then
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if [ "x$action" = xsuspend ]; then
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suspend_guest "$uri" "$guest"
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else
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shutdown_guest "$uri" "$guest"
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