Settings for libvirt's guest handling in CentOS.

$libvirt_guest_on_boot
    Action to taken on host boot [start, ignore] (default: start)

$libvirt_guest_on_shutdown
    Action to taken on host shutdown [suspend, shutdown] (default: suspend)

$libvirt_parallel_shutdown
    If set to non-zero, shutdown will suspend guests concurrently. (default: 0)

libvirt/templates/sysconfig-libvirt-guests.erb

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+# URIs to check for running guests
+# example: URIS='default xen:/// vbox+tcp://host/system lxc:///'
+#URIS=default
+
+# action taken on host boot
+# - start   all guests which were running on shutdown are started on boot
+#           regardless on their autostart settings
+# - ignore  libvirt-guests init script won't start any guest on boot, however,
+#           guests marked as autostart will still be automatically started by
+#           libvirtd
+ON_BOOT=<%= libvirt_guest_on_boot %>
+
+# Number of seconds to wait between each guest start. Set to 0 to allow
+# parallel startup.
+#START_DELAY=0
+
+# action taken on host shutdown
+# - suspend   all running guests are suspended using virsh managedsave
+# - shutdown  all running guests are asked to shutdown. Please be careful with
+#             this settings since there is no way to distinguish between a
+#             guest which is stuck or ignores shutdown requests and a guest
+#             which just needs a long time to shutdown. When setting
+#             ON_SHUTDOWN=shutdown, you must also set SHUTDOWN_TIMEOUT to a
+#             value suitable for your guests.
+ON_SHUTDOWN=<%= libvirt_guest_on_shutdown %>
+
+# If set to non-zero, shutdown will suspend guests concurrently. Number of
+# guests on shutdown at any time will not exceed number set in this variable.
+PARALLEL_SHUTDOWN=<%= libvirt_parallel_shutdown %>
+
+# Number of seconds we're willing to wait for a guest to shut down. If parallel
+# shutdown is enabled, this timeout applies as a timeout for shutting down all
+# guests on a single URI defined in the variable URIS. If this is 0, then there
+# is no time out (use with caution, as guests might not respond to a shutdown
+# request). The default value is 300 seconds (5 minutes).
+#SHUTDOWN_TIMEOUT=300
+
+# If non-zero, try to bypass the file system cache when saving and
+# restoring guests, even though this may give slower operation for
+# some file systems.
+#BYPASS_CACHE=0