Make live_migration a first-class compute API.

* Move the trivial implementation from admin_actions to compute.api
* Remove the dependency to scheduler from admin_actions
* Add check_instance_state like all other compute APIs to prevent
undesirable behavior

Change-Id: Ib5176718eae624de982f641bf3ec201fc7b4efcc

1 files changed, 14 insertions, 0 deletions

diff --git a/nova/compute/api.py b/nova/compute/api.py
index b5babf30d..e877fe6c2 100644
--- a/nova/compute/api.py
+++ b/nova/compute/api.py
@@ -1826,6 +1826,20 @@ class API(base.Base):
         return self.db.block_device_mapping_get_all_by_instance(context,
                 instance['uuid'])
 
+    @check_instance_state(vm_state=[vm_states.ACTIVE])
+    def live_migrate(self, context, instance, block_migration,
+                     disk_over_commit, host):
+        """Migrate a server lively to a new host."""
+        instance_uuid = instance["uuid"]
+        LOG.debug(_("Going to try to live migrate instance"),
+                  instance=instance)
+        self.scheduler_rpcapi.live_migration(context,
+                block_migration,
+                disk_over_commit,
+                instance["id"],
+                host,
+                topic=FLAGS.compute_topic)
+
 
 class HostAPI(base.Base):
     def __init__(self):