The reason the live migration CI job didn't catch this is that it
doesn't test microversion >= 2.34 which changes to use the
live_migrate_instance method. If the microversion < 2.34 it uses the
migrate_server method which has the @targets_cell decorator.
** Summary changed:
- Failed to live-migrate instance in cell.
+ Failed to live-migrate instance in cell with microversion >= 2.34
** Changed in: nova
Importance: Undecided => High
** Also affects: nova/pike
Importance: Undecided
Status: New
** Changed in: nova/pike
Status: New => Confirmed
** Changed in: nova/pike
Importance: Undecided => High
** Tags added: cells live-migration
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https://bugs.launchpad.net/bugs/1716903
Title:
Failed to live-migrate instance in cell with microversion >= 2.34
Status in OpenStack Compute (nova):
In Progress
Status in OpenStack Compute (nova) pike series:
Confirmed
Bug description:
Step 1 create instance in cell1
+--------------------------------------+--------+--------+------------+-------------+---------------------------------+
| ID | Name | Status | Task State | Power
State | Networks |
+--------------------------------------+--------+--------+------------+-------------+---------------------------------+
| 84038890-8d70-45e1-8240-2303f4227e11 | yikun1 | ACTIVE | - |
Running | public=2001:db8::a, 172.24.4.13 |
+--------------------------------------+--------+--------+------------+-------------+---------------------------------+
Step 2 live migrate instance
nova live-migration 84038890-8d70-45e1-8240-2303f4227e11
Step 3
The instance will stuck in "MIGRATIING" state.
+--------------------------------------+--------+-----------+------------+-------------+---------------------------------+
| ID | Name | Status | Task State |
Power State | Networks |
+--------------------------------------+--------+-----------+------------+-------------+---------------------------------+
| 84038890-8d70-45e1-8240-2303f4227e11 | yikun1 | MIGRATING | migrating |
Running | public=2001:db8::a, 172.24.4.13 |
+--------------------------------------+--------+-----------+------------+-------------+---------------------------------+
It seems we need add @targets_cell decorator for **live_migrate_instance**
methods in conductor:
https://github.com/openstack/nova/blob/master/nova/conductor/manager.py#L378
ERROR LOG in super conductor:
Exception during message handling: InstanceActionNotFound: Action for
request_id req-5aa03558-ae14-458e-9c35-c3d377c7ce45 on instance
84038890-8d70-45e1-8240-2303f4227e11 not found
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py",
line 160, in _process_incoming
res = self.dispatcher.dispatch(message)
File
"/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line
213, in dispatch
return self._do_dispatch(endpoint, method, ctxt, args)
File
"/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line
183, in _do_dispatch
result = func(ctxt, **new_args)
File "/opt/stack/nova/nova/compute/utils.py", line 875, in
decorated_function
with EventReporter(context, event_name, instance_uuid):
File "/opt/stack/nova/nova/compute/utils.py", line 846, in __enter__
self.context, uuid, self.event_name, want_result=False)
File
"/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line
184, in wrapper
result = fn(cls, context, *args, **kwargs)
File "/opt/stack/nova/nova/objects/instance_action.py", line 169, in
event_start
db_event = db.action_event_start(context, values)
File "/opt/stack/nova/nova/db/api.py", line 1957, in action_event_start
return IMPL.action_event_start(context, values)
File "/opt/stack/nova/nova/db/sqlalchemy/api.py", line 250, in wrapped
return f(context, *args, **kwargs)
File "/opt/stack/nova/nova/db/sqlalchemy/api.py", line 6155, in
action_event_start
instance_uuid=values['instance_uuid'])
InstanceActionNotFound: Action for request_id
req-5aa03558-ae14-458e-9c35-c3d377c7ce45 on instance
84038890-8d70-45e1-8240-2303f4227e11 not found
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