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[Bug 1895092] [NEW] Error when trying block migration

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Tatsuji Miyamoto <1895092@xxxxxxxxxxxxxxxxxx>
Date: Thu, 10 Sep 2020 06:48:26 -0000
Reply-to: Bug 1895092 <1895092@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

When I try live-migration to different host by using block migration
with following command, API error is occurred.

$ openstack server migrate --block-migration
3bf28a9d-0545-4d30-8892-6e2af655db4a --live compute40

--- error message ---
Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
<class 'MigrationError_Remote'> (HTTP 500) (Request-ID: req-2c75be17-d5c4-4acd-a302-326388068067)
---------------------

I attached the log of nova-api and information of openstack environment
as follows.

### /var/log/nova/nova-api.log
2020-09-10 14:27:47.614 3545 INFO nova.osapi_compute.wsgi.server [req-1028bb0a-a95a-41b1-9ab9-2ebf7b19039f 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] 10.81.0.2 "GET /v2.1/servers/3bf28a9d-0545-4d30-8892-6e2af655db4a HTTP/1.1" status: 200 len: 2312 time: 0.7340441
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi [req-2c75be17-d5c4-4acd-a302-326388068067 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] Unexpected exception in API method: MigrationError_Remote: Migration error: Unable to establish connection to http://controller01:5000/v3/auth/tokens: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi Traceback (most recent call last):
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/openstack/wsgi.py", line 801, in wrapped
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return f(*args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 110, in wrapper
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 110, in wrapper
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 110, in wrapper
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/openstack/compute/migrate_server.py", line 111, in _migrate_live
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     async_)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 206, in inner
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return function(self, context, instance, *args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 214, in _wrapped
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return fn(self, context, instance, *args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 154, in inner
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return f(self, context, instance, *args, **kw)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 4550, in live_migrate
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     request_spec=request_spec, async_=async_)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/api.py", line 112, in live_migrate_instance
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     request_spec=request_spec)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/rpcapi.py", line 338, in migrate_server
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return cctxt.call(context, 'migrate_server', **kw)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/client.py", line 179, in call
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     retry=self.retry)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/transport.py", line 133, in _send
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     retry=retry)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 584, in send
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     call_monitor_timeout, retry=retry)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 575, in _send
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     raise result
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi MigrationError_Remote: Migration error: Unable to establish connection to http://controller01:5000/v3/auth/tokens: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi Traceback (most recent call last):
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 163, in _process_incoming
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     res = self.dispatcher.dispatch(message)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 265, in dispatch
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return self._do_dispatch(endpoint, method, ctxt, args)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 194, in _do_dispatch
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     result = func(ctxt, **new_args)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 226, in inner
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 94, in wrapper
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return fn(self, context, *args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/utils.py", line 1164, in decorated_function
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi2020-09-10 14:27:47.614 3545 INFO nova.osapi_compute.wsgi.server [req-1028bb0a-a95a-41b1-9ab9-2ebf7b19039f 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] 10.81.0.2 "GET /v2.1/servers/3bf28a9d-0545-4d30-8892-6e2af655db4a HTTP/1.1" status: 200 len: 2312 time: 0.7340441
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi [req-2c75be17-d5c4-4acd-a302-326388068067 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] Unexpected exception in API method: MigrationError_Remote: Migration error: Unable to establish connection to http://controller01:5000/v3/auth/tokens: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi Traceback (most recent call last):
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/openstack/wsgi.py", line 801, in wrapped
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return f(*args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 110, in wrapper
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 110, in wrapper
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 110, in wrapper
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/openstack/compute/migrate_server.py", line 111, in _migrate_live
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     async_)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 206, in inner
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return function(self, context, instance, *args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 214, in _wrapped
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return fn(self, context, instance, *args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 154, in inner
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return f(self, context, instance, *args, **kw)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 4550, in live_migrate
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     request_spec=request_spec, async_=async_)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/api.py", line 112, in live_migrate_instance
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     request_spec=request_spec)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/rpcapi.py", line 338, in migrate_server
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return cctxt.call(context, 'migrate_server', **kw)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/client.py", line 179, in call
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     retry=self.retry)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/transport.py", line 133, in _send
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     retry=retry)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 584, in send
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     call_monitor_timeout, retry=retry)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 575, in _send
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     raise result
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi MigrationError_Remote: Migration error: Unable to establish connection to http://controller01:5000/v3/auth/tokens: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi Traceback (most recent call last):
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 163, in _process_incoming
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     res = self.dispatcher.dispatch(message)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 265, in dispatch
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return self._do_dispatch(endpoint, method, ctxt, args)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 194, in _do_dispatch
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     result = func(ctxt, **new_args)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 226, in inner
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 94, in wrapper
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return fn(self, context, *args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/utils.py", line 1164, in decorated_function
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return function(self, context, *args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 290, in migrate_server
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     block_migration, disk_over_commit, request_spec)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 463, in _live_migrate
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     raise exception.MigrationError(reason=six.text_type(ex))
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi MigrationError: Migration error: Unable to establish connection to http://controller01:5000/v3/auth/tokens: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.154 3545 INFO nova.api.openstack.wsgi [req-2c75be17-d5c4-4acd-a302-326388068067 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] HTTP exception thrown: Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
2020-09-10 14:27:50.158 3545 INFO nova.osapi_compute.wsgi.server [req-2c75be17-d5c4-4acd-a302-326388068067 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] 10.81.0.2 "POST /v2.1/servers/3bf28a9d-0545-4d30-8892-6e2af655db4a/action HTTP/1.1" status: 500 len: 628 time: 2.5385709
2020-09-10 14:27:51.440 3542 INFO nova.osapi_compute.wsgi.server [req-d9df0e46-c916-47be-8d13-ab7ad06bd28d 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] 172.16.1.19 "GET /v2.1/flavors/detail?project_id=85dd9df42f4e47b3b0fc5848ab947b62 HTTP/1.1" status: 200 len: 1853 time: 0.0354841
     return function(self, context, *args, **kwargs)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 290, in migrate_server
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     block_migration, disk_over_commit, request_spec)
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 463, in _live_migrate
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     raise exception.MigrationError(reason=six.text_type(ex))
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi MigrationError: Migration error: Unable to establish connection to http://controller01:5000/v3/auth/tokens: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
2020-09-10 14:27:50.154 3545 INFO nova.api.openstack.wsgi [req-2c75be17-d5c4-4acd-a302-326388068067 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] HTTP exception thrown: Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
2020-09-10 14:27:50.158 3545 INFO nova.osapi_compute.wsgi.server [req-2c75be17-d5c4-4acd-a302-326388068067 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] 10.81.0.2 "POST /v2.1/servers/3bf28a9d-0545-4d30-8892-6e2af655db4a/action HTTP/1.1" status: 500 len: 628 time: 2.5385709
2020-09-10 14:27:51.440 3542 INFO nova.osapi_compute.wsgi.server [req-d9df0e46-c916-47be-8d13-ab7ad06bd28d 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] 172.16.1.19 "GET /v2.1/flavors/detail?project_id=85dd9df42f4e47b3b0fc5848ab947b62 HTTP/1.1" status: 200 len: 1853 time: 0.0354841

-----------------------------------------------

### server information
$dpkg -l | grep nova
ii  nova-api                               2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - API frontend
ii  nova-common                            2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - common files
ii  nova-conductor                         2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - conductor service
ii  nova-consoleauth                       2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - Console Authenticator
ii  nova-novncproxy                        2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - NoVNC proxy
ii  nova-placement-api                     2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - placement API frontend
ii  nova-scheduler                         2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - virtual machine scheduler
ii  python-nova                            2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute Python 2 libraries
ii  python-novaclient                      2:11.0.0-0ubuntu1~cloud0                        all          client library for OpenStack Compute API - Python 2.7
ii  python3-novaclient                     2:11.0.0-0ubuntu1~cloud0                        all          client library for OpenStack Compute API - 3.x

# lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
CPU(s):              16
On-line CPU(s) list: 0-15
Thread(s) per core:  2
Core(s) per socket:  8
Socket(s):           1
NUMA node(s):        1
Vendor ID:           GenuineIntel
CPU family:          6
Model:               45
Model name:          Intel(R) Xeon(R) CPU E5-2450 0 @ 2.10GHz
Stepping:            7
CPU MHz:             1779.529
CPU max MHz:         2900.0000
CPU min MHz:         1200.0000
BogoMIPS:            4189.92
Virtualization:      VT-x
L1d cache:           32K
L1i cache:           32K
L2 cache:            256K
L3 cache:            20480K
NUMA node0 CPU(s):   0-15
Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm epb pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid xsaveopt dtherm ida arat pln pts md_clear flush_l1d

# lvmdiskscan
  /dev/sda2 [     278.87 GiB] 
  0 disks
  1 partition
  0 LVM physical volume whole disks
  0 LVM physical volumes

$ openstack server list
(ellipsis)
| 3bf28a9d-0545-4d30-8892-6e2af655db4a | upfd7      | ACTIVE | nw-mgmt=172.16.2.156; nw-upid1=10.4.6.156; nw-cpn4d1=10.4.3.156; nw-ngud1=10.4.5.156                      | xenial-server | m1.ph_bin |

** Affects: nova
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1895092

Title:
  Error when trying block migration

Status in OpenStack Compute (nova):
  New

Bug description:
  When I try live-migration to different host by using block migration
  with following command, API error is occurred.

  $ openstack server migrate --block-migration
  3bf28a9d-0545-4d30-8892-6e2af655db4a --live compute40

  --- error message ---
  Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
  <class 'MigrationError_Remote'> (HTTP 500) (Request-ID: req-2c75be17-d5c4-4acd-a302-326388068067)
  ---------------------

  I attached the log of nova-api and information of openstack
  environment as follows.

  ### /var/log/nova/nova-api.log
  2020-09-10 14:27:47.614 3545 INFO nova.osapi_compute.wsgi.server [req-1028bb0a-a95a-41b1-9ab9-2ebf7b19039f 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] 10.81.0.2 "GET /v2.1/servers/3bf28a9d-0545-4d30-8892-6e2af655db4a HTTP/1.1" status: 200 len: 2312 time: 0.7340441
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi [req-2c75be17-d5c4-4acd-a302-326388068067 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] Unexpected exception in API method: MigrationError_Remote: Migration error: Unable to establish connection to http://controller01:5000/v3/auth/tokens: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi Traceback (most recent call last):
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/openstack/wsgi.py", line 801, in wrapped
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return f(*args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 110, in wrapper
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 110, in wrapper
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 110, in wrapper
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/openstack/compute/migrate_server.py", line 111, in _migrate_live
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     async_)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 206, in inner
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return function(self, context, instance, *args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 214, in _wrapped
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return fn(self, context, instance, *args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 154, in inner
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return f(self, context, instance, *args, **kw)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 4550, in live_migrate
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     request_spec=request_spec, async_=async_)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/api.py", line 112, in live_migrate_instance
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     request_spec=request_spec)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/rpcapi.py", line 338, in migrate_server
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return cctxt.call(context, 'migrate_server', **kw)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/client.py", line 179, in call
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     retry=self.retry)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/transport.py", line 133, in _send
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     retry=retry)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 584, in send
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     call_monitor_timeout, retry=retry)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 575, in _send
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     raise result
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi MigrationError_Remote: Migration error: Unable to establish connection to http://controller01:5000/v3/auth/tokens: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi Traceback (most recent call last):
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 163, in _process_incoming
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     res = self.dispatcher.dispatch(message)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 265, in dispatch
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return self._do_dispatch(endpoint, method, ctxt, args)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 194, in _do_dispatch
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     result = func(ctxt, **new_args)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 226, in inner
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 94, in wrapper
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return fn(self, context, *args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/utils.py", line 1164, in decorated_function
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi2020-09-10 14:27:47.614 3545 INFO nova.osapi_compute.wsgi.server [req-1028bb0a-a95a-41b1-9ab9-2ebf7b19039f 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] 10.81.0.2 "GET /v2.1/servers/3bf28a9d-0545-4d30-8892-6e2af655db4a HTTP/1.1" status: 200 len: 2312 time: 0.7340441
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi [req-2c75be17-d5c4-4acd-a302-326388068067 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] Unexpected exception in API method: MigrationError_Remote: Migration error: Unable to establish connection to http://controller01:5000/v3/auth/tokens: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi Traceback (most recent call last):
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/openstack/wsgi.py", line 801, in wrapped
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return f(*args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 110, in wrapper
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 110, in wrapper
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 110, in wrapper
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/api/openstack/compute/migrate_server.py", line 111, in _migrate_live
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     async_)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 206, in inner
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return function(self, context, instance, *args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 214, in _wrapped
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return fn(self, context, instance, *args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 154, in inner
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return f(self, context, instance, *args, **kw)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 4550, in live_migrate
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     request_spec=request_spec, async_=async_)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/api.py", line 112, in live_migrate_instance
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     request_spec=request_spec)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/rpcapi.py", line 338, in migrate_server
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return cctxt.call(context, 'migrate_server', **kw)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/client.py", line 179, in call
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     retry=self.retry)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/transport.py", line 133, in _send
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     retry=retry)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 584, in send
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     call_monitor_timeout, retry=retry)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 575, in _send
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     raise result
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi MigrationError_Remote: Migration error: Unable to establish connection to http://controller01:5000/v3/auth/tokens: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi Traceback (most recent call last):
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 163, in _process_incoming
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     res = self.dispatcher.dispatch(message)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 265, in dispatch
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return self._do_dispatch(endpoint, method, ctxt, args)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 194, in _do_dispatch
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     result = func(ctxt, **new_args)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 226, in inner
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return func(*args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 94, in wrapper
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return fn(self, context, *args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/compute/utils.py", line 1164, in decorated_function
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     return function(self, context, *args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 290, in migrate_server
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     block_migration, disk_over_commit, request_spec)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 463, in _live_migrate
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     raise exception.MigrationError(reason=six.text_type(ex))
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi MigrationError: Migration error: Unable to establish connection to http://controller01:5000/v3/auth/tokens: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.154 3545 INFO nova.api.openstack.wsgi [req-2c75be17-d5c4-4acd-a302-326388068067 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] HTTP exception thrown: Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
  2020-09-10 14:27:50.158 3545 INFO nova.osapi_compute.wsgi.server [req-2c75be17-d5c4-4acd-a302-326388068067 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] 10.81.0.2 "POST /v2.1/servers/3bf28a9d-0545-4d30-8892-6e2af655db4a/action HTTP/1.1" status: 500 len: 628 time: 2.5385709
  2020-09-10 14:27:51.440 3542 INFO nova.osapi_compute.wsgi.server [req-d9df0e46-c916-47be-8d13-ab7ad06bd28d 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] 172.16.1.19 "GET /v2.1/flavors/detail?project_id=85dd9df42f4e47b3b0fc5848ab947b62 HTTP/1.1" status: 200 len: 1853 time: 0.0354841
       return function(self, context, *args, **kwargs)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 290, in migrate_server
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     block_migration, disk_over_commit, request_spec)
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 463, in _live_migrate
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi     raise exception.MigrationError(reason=six.text_type(ex))
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi MigrationError: Migration error: Unable to establish connection to http://controller01:5000/v3/auth/tokens: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.134 3545 ERROR nova.api.openstack.wsgi 
  2020-09-10 14:27:50.154 3545 INFO nova.api.openstack.wsgi [req-2c75be17-d5c4-4acd-a302-326388068067 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] HTTP exception thrown: Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
  2020-09-10 14:27:50.158 3545 INFO nova.osapi_compute.wsgi.server [req-2c75be17-d5c4-4acd-a302-326388068067 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] 10.81.0.2 "POST /v2.1/servers/3bf28a9d-0545-4d30-8892-6e2af655db4a/action HTTP/1.1" status: 500 len: 628 time: 2.5385709
  2020-09-10 14:27:51.440 3542 INFO nova.osapi_compute.wsgi.server [req-d9df0e46-c916-47be-8d13-ab7ad06bd28d 170fdf1f861847fa995f2f0646ec4143 85dd9df42f4e47b3b0fc5848ab947b62 - default default] 172.16.1.19 "GET /v2.1/flavors/detail?project_id=85dd9df42f4e47b3b0fc5848ab947b62 HTTP/1.1" status: 200 len: 1853 time: 0.0354841

  -----------------------------------------------

  ### server information
  $dpkg -l | grep nova
  ii  nova-api                               2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - API frontend
  ii  nova-common                            2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - common files
  ii  nova-conductor                         2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - conductor service
  ii  nova-consoleauth                       2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - Console Authenticator
  ii  nova-novncproxy                        2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - NoVNC proxy
  ii  nova-placement-api                     2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - placement API frontend
  ii  nova-scheduler                         2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute - virtual machine scheduler
  ii  python-nova                            2:18.3.0-0ubuntu1~cloud1                        all          OpenStack Compute Python 2 libraries
  ii  python-novaclient                      2:11.0.0-0ubuntu1~cloud0                        all          client library for OpenStack Compute API - Python 2.7
  ii  python3-novaclient                     2:11.0.0-0ubuntu1~cloud0                        all          client library for OpenStack Compute API - 3.x

  # lscpu
  Architecture:        x86_64
  CPU op-mode(s):      32-bit, 64-bit
  Byte Order:          Little Endian
  CPU(s):              16
  On-line CPU(s) list: 0-15
  Thread(s) per core:  2
  Core(s) per socket:  8
  Socket(s):           1
  NUMA node(s):        1
  Vendor ID:           GenuineIntel
  CPU family:          6
  Model:               45
  Model name:          Intel(R) Xeon(R) CPU E5-2450 0 @ 2.10GHz
  Stepping:            7
  CPU MHz:             1779.529
  CPU max MHz:         2900.0000
  CPU min MHz:         1200.0000
  BogoMIPS:            4189.92
  Virtualization:      VT-x
  L1d cache:           32K
  L1i cache:           32K
  L2 cache:            256K
  L3 cache:            20480K
  NUMA node0 CPU(s):   0-15
  Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm epb pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid xsaveopt dtherm ida arat pln pts md_clear flush_l1d

  # lvmdiskscan
    /dev/sda2 [     278.87 GiB] 
    0 disks
    1 partition
    0 LVM physical volume whole disks
    0 LVM physical volumes

  $ openstack server list
  (ellipsis)
  | 3bf28a9d-0545-4d30-8892-6e2af655db4a | upfd7      | ACTIVE | nw-mgmt=172.16.2.156; nw-upid1=10.4.6.156; nw-cpn4d1=10.4.3.156; nw-ngud1=10.4.5.156                      | xenial-server | m1.ph_bin |

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Follow ups

[Bug 1895092] Re: Error when trying block migration
From: Sylvain Bauza, 2020-09-15