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Message #79814
[Bug 1499012] Re: Nova and Cinder get desynced on volume attachments
[Expired for OpenStack Compute (nova) because there has been no activity
for 60 days.]
** Changed in: nova
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1499012
Title:
Nova and Cinder get desynced on volume attachments
Status in OpenStack Compute (nova):
Expired
Bug description:
This bug occurred with versions 2015.1.0 of Nova and Cinder installed.
When bulk deleting large numbers of Nova instances, we occasionally
encounter something that appears to be a race condition where Cinder
believes a volume is detached and available but Nova reports the
volume is still attached to an instance.
Example below shows an instance in ERROR state (some output of nova
show truncated for brevity) and Cinder showing that the volume Nova
thinks is attached is available:
+--------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Property | Value |
+--------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| OS-DCF:diskConfig | MANUAL |
| OS-EXT-AZ:availability_zone | --- |
| OS-EXT-SRV-ATTR:host | --- |
| OS-EXT-SRV-ATTR:hypervisor_hostname | --- |
| OS-EXT-SRV-ATTR:instance_name | instance-0000427f |
| OS-EXT-STS:power_state | 0 |
| OS-EXT-STS:task_state | - |
| OS-EXT-STS:vm_state | error |
| OS-SRV-USG:launched_at | 2015-09-22T15:39:06.000000 |
| OS-SRV-USG:terminated_at | - |
| accessIPv4 | |
| accessIPv6 | |
| config_drive | |
| created | 2015-09-22T14:04:40Z |
|
| flavor | m1.small (2) |
| hostId | e2d6789d6505366a3d78097d4c0bf99b8f30dd49b5561b1f94e0cdcb |
| id | 247d9ebe-6794-4119-b677-d990fd6244b1 |
| image | Red Hat Enterprise Linux 7 (current) (297e1979-cfa0-4596-8446-95c29ac640cc) |
| key_name | --- |
| metadata | {} |
| name | r_img_test_z2_1 |
| os-extended-volumes:volumes_attached | [{"id": "7adab934-360f-4cd0-9c98-7d6bea1554b3"}] |
| security_groups | default |
| status | ERROR |
| tenant_id | a9421c18f6fc48fea53c5685654f625a |
| updated | 2015-09-23T13:51:10Z |
| user_id | --- |
+--------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+--------------------------------------+----------------------------------+-----------+--------------+------+-------------+----------+-------------+
| ID | Tenant ID | Status | Display Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+----------------------------------+-----------+--------------+------+-------------+----------+-------------+
| 7adab934-360f-4cd0-9c98-7d6bea1554b3 | a9421c18f6fc48fea53c5685654f625a | available | test2 | 20 | SSD | false | |
+--------------------------------------+----------------------------------+-----------+--------------+------+-------------+----------+-------------+
Attempting to delete the instance while in this state results in the
following traceback from nova-client:
File \"/usr/lib/python2.7/dist-packages/nova/compute/manager.py\", line 343, in decorated_function
return function(self, context, *args, **kwargs)
File \"/usr/lib/python2.7/dist-packages/nova/compute/manager.py\", line 2737, in terminate_instance
do_terminate_instance(instance, bdms)
File \"/usr/lib/python2.7/dist-packages/oslo_concurrency/lockutils.py\", line 445, in inner
return f(*args, **kwargs)
File \"/usr/lib/python2.7/dist-packages/nova/compute/manager.py\", line 2735, in do_terminate_instance
self._set_instance_error_state(context, instance)
File \"/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py\", line 85, in __exit__
six.reraise(self.type_, self.value, self.tb)
File \"/usr/lib/python2.7/dist-packages/nova/compute/manager.py\", line 2725, in do_terminate_instance
self._delete_instance(context, instance, bdms, quotas)
File \"/usr/lib/python2.7/dist-packages/nova/hooks.py\", line 149, in inner
rv = f(*args, **kwargs)
File \"/usr/lib/python2.7/dist-packages/nova/compute/manager.py\", line 2694, in _delete_instance
quotas.rollback()
File \"/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py\", line 85, in __exit__
six.reraise(self.type_, self.value, self.tb)
File \"/usr/lib/python2.7/dist-packages/nova/compute/manager.py\", line 2664, in _delete_instance
self._shutdown_instance(context, instance, bdms)
File \"/usr/lib/python2.7/dist-packages/nova/compute/manager.py\", line 2604, in _shutdown_instance
self.volume_api.detach(context, bdm.volume_id)
File \"/usr/lib/python2.7/dist-packages/nova/volume/cinder.py\", line 214, in wrapper
res = method(self, ctx, volume_id, *args, **kwargs)
File \"/usr/lib/python2.7/dist-packages/nova/volume/cinder.py\", line 365, in detach
cinderclient(context).volumes.detach(volume_id)
File \"/usr/lib/python2.7/dist-packages/cinderclient/v2/volumes.py\", line 334, in detach
return self._action('os-detach', volume)
File \"/usr/lib/python2.7/dist-packages/cinderclient/v2/volumes.py\", line 311, in _action
return self.api.client.post(url, body=body)
File \"/usr/lib/python2.7/dist-packages/cinderclient/client.py\", line 91, in post
return self._cs_request(url, 'POST', **kwargs)
File \"/usr/lib/python2.7/dist-packages/cinderclient/client.py\", line 85, in _cs_request
return self.request(url, method, **kwargs)
File \"/usr/lib/python2.7/dist-packages/cinderclient/client.py\", line 80, in request
return super(SessionClient, self).request(*args, **kwargs)
File \"/usr/lib/python2.7/dist-packages/keystoneclient/adapter.py\", line 200, in request
resp = super(LegacyJsonAdapter, self).request(*args, **kwargs)
File \"/usr/lib/python2.7/dist-packages/keystoneclient/adapter.py\", line 89, in request
return self.session.request(url, method, **kwargs)
File \"/usr/lib/python2.7/dist-packages/keystoneclient/utils.py\", line 318, in inner
return func(*args, **kwargs)
File \"/usr/lib/python2.7/dist-packages/keystoneclient/session.py\", line 389, in request
raise exceptions.from_response(resp, method, url)
Cinder logs an exception stating that the volume has no attachments:
2015-09-23 09:49:47.923 42963 ERROR cinder.volume.manager [req-4a2f6878-54ec-45a9-abcf-f4439a6c2de8 cloud_ll2 e000f9d1f3bf4f758e1d77c94da61281 - - -] Volume 7adab934-360f-4cd0-9c98-7d6bea1554b3 doesn't have any attachments to detach
2015-09-23 09:49:47.924 42963 ERROR oslo_messaging.rpc.dispatcher [req-4a2f6878-54ec-45a9-abcf-f4439a6c2de8 cloud_ll2 e000f9d1f3bf4f758e1d77c94da61281 - - -] Exception during message handling: Invalid volume: Volume 7adab934-360f-4cd0-9c98-7d6bea1554b3 doesn't have any attachments to detach
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher Traceback (most recent call last):
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 142, in _dispatch_and_reply
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher executor_callback))
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 186, in _dispatch
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher executor_callback)
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 130, in _do_dispatch
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher result = func(ctxt, **new_args)
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/osprofiler/profiler.py", line 105, in wrapper
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher return f(*args, **kwargs)
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/cinder/volume/manager.py", line 157, in ldo_inner1
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher return ldo_inner2(inst, context, volume_id, attachment_id, **kwargs)
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_concurrency/lockutils.py", line 445, in inner
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher return f(*args, **kwargs)
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/cinder/volume/manager.py", line 156, in ldo_inner2
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher return f(*_args, **_kwargs)
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/cinder/volume/manager.py", line 882, in detach_volume
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher raise exception.InvalidVolume(reason=msg)
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher InvalidVolume: Invalid volume: Volume 7adab934-360f-4cd0-9c98-7d6bea1554b3 doesn't have any attachments to detach
2015-09-23 09:49:47.924 42963 TRACE oslo_messaging.rpc.dispatcher
While in this state, Nova refuses to take any action on the instance,
including force deletion. Removing the volume via cinder delete
unsticks things; nova delete will remove the instance once the
offending volume has been removed.
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References
