[libvirt] libvirt-guests - migrate/relocate on stop feature request

[Maurits van de Lande]

Hello,

<could you send your modifications as a patch? Ideally using git but if that's too much for you, even the output of
<
<    diff -u unmodified-libvirt-guests modified-libvirt-guests
<
<would work much better than just the modified script.

Oké, I haven't worked with git yet. Here is the diff output:

--- libvirt-guests	2011-11-04 12:11:58.326115749 +0100
+++ libvirt-guests-modified	2011-11-04 12:17:55.032105427 +0100
@@ -9,8 +9,8 @@
 # Default-Start: 2 3 4 5
 # Default-Stop: 0 1 6
 # Short-Description: suspend/resume libvirt guests on shutdown/boot
-# Description: This is a script for suspending active libvirt guests
-#              on shutdown and resuming them on next boot
+# Description: This is a script for suspending or migrating active libvirt guests
+#              on shutdown and resuming the suspended guest on next boot.
 #              See http://libvirt.org
 ### END INIT INFO
 
@@ -19,8 +19,9 @@
 # libvirt-guests:   suspend/resume libvirt guests on shutdown/boot
 #
 # chkconfig: 345 99 01
-# description:  This is a script for suspending active libvirt guests \
-#               on shutdown and resuming them on next boot \
+# description:  This is a script for suspending or relocation active \
+#               libvirt guests on shutdown and resuming the suspended \
+#               guests on next boot \
 #               See http://libvirt.org
 #
 
@@ -35,7 +36,9 @@
 URIS=default
 ON_BOOT=start
 ON_SHUTDOWN=suspend
+#ON_SHUTDOWN=migrate
 SHUTDOWN_TIMEOUT=0
+RELOCATION_HOST=RelocationHostname.domain.local
 
 test -f "$sysconfdir"/sysconfig/libvirt-guests && . "$sysconfdir"/sysconfig/libvirt-guests
 
@@ -208,14 +211,18 @@
         $guest_running || break
         printf '\r%s%-12d ' "$label" $timeout
     done
+}
 
-    if guest_is_on $uri $guest; then
-        if $guest_running; then
-            printf '\r%s%-12s\n' "$label" $"failed to shutdown in time"
-        else
-            printf '\r%s%-12s\n' "$label" $"done"
-        fi
-    fi
+migrate_guest()
+{
+    uri=$1
+    guest=$2
+
+    name=$(guest_name $uri $guest)
+    label=$"Migrating $name: to $RELOCATION_HOST"
+    echo -n "$label"
+    echo
+    retval run_virsh $uri migrate --live --verbose $guest "qemu+ssh://$RELOCATION_HOST/system" || return
 }
 
 stop() {
@@ -223,14 +230,19 @@
     [ -f "$LISTFILE" ] && return 0
 
     suspending=true
-    if [ "x$ON_SHUTDOWN" = xshutdown ]; then
-        suspending=false
-        if [ $SHUTDOWN_TIMEOUT -le 0 ]; then
-            echo $"Shutdown action requested but SHUTDOWN_TIMEOUT was not set"
-            RETVAL=6
-            return
-        fi
-    fi
+    case "x$ON_SHUTDOWN" in
+        xshutdown )
+            suspending=false
+            if [ $SHUTDOWN_TIMEOUT -le 0 ]; then
+                echo $"Shutdown action requested but SHUTDOWN_TIMEOUT was not set"
+                RETVAL=6
+                return
+            fi
+            ;;
+        xmigrate )
+            suspending=false
+        ;;
+    esac
 
     : >"$LISTFILE"
     for uri in $URIS; do
@@ -262,16 +274,28 @@
         if $suspending; then
             echo $"Suspending guests on $uri URI..."
         else
-            echo $"Shutting down guests on $uri URI..."
+            if [ "x$ON_SHUTDOWN" = xshutdown ]; then
+                echo $"Shutting down guests on $uri URI..."
+            else
+                echo $"Migrating guests on $uri URI to $RELOCATION_HOST ..." 
+            fi
         fi
 
         for guest in $list; do
             if $suspending; then
                 suspend_guest $uri $guest
             else
-                shutdown_guest $uri $guest
+                if [ "x$ON_SHUTDOWN" = xshutdown ]; then
+                    shutdown_guest $uri $guest
+                else
+                    migrate_guest $uri $guest
+                fi
             fi
         done
+        if [ "x$ON_SHUTDOWN" = xmigrate ]; then
+            #delete listfile after migrating all VM's
+            rm -f $LISTFILE
+        fi
     done <"$LISTFILE"
 
     rm -f "$VAR_SUBSYS_LIBVIRT_GUESTS"
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