OpenStack Compute (nova)

resize to smaller flavor failed, but has not error message on dashboard

Bug #1707830 reported by Zhaokun Fu on 2017-08-01

This bug affects 9 people

Affects		Status	Importance	Assigned to	Milestone
	OpenStack Compute (nova)	Confirmed	Low	Unassigned

Bug Description

When use resize instance, resize fails for smaller disk in new flavor, but dashboard has no error message.

Steps to reproduce:
1.) Create instance(using cirros is OK) with a flavor A-1-1-10(1 vcpu, 1024M memory, 10G disk)
2.) Try resize instance to flavor which has smaller root disk B-1-1-1(1 vcpu, 1024M memory, 1G disk)

Expected result:
show error message on dashboard.Something like unable to resize disk down.

Actual result:
No error message showed on dashboard.

Logs:
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server [req-6f03b653-9c79-48fe-b40b-99c99c92687e ff8d89b8eda64c8f9a46548744db65d2 5a7d5cf5df734994bac9ff1d4f475bca - - -] Exception during message handling
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 155, in _process_incoming
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server res = self.dispatcher.dispatch(message)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 222, in dispatch
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server return self._do_dispatch(endpoint, method, ctxt, args)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 192, in _do_dispatch
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server result = func(ctxt, **new_args)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/exception_wrapper.py", line 75, in wrapped
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server function_name, call_dict, binary)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server self.force_reraise()
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/exception_wrapper.py", line 66, in wrapped
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server return f(self, context, *args, **kw)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/compute/manager.py", line 188, in decorated_function
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server LOG.warning(msg, e, instance=instance)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server self.force_reraise()
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/compute/manager.py", line 157, in decorated_function
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server return function(self, context, *args, **kwargs)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/compute/utils.py", line 686, in decorated_function
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server return function(self, context, *args, **kwargs)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/compute/manager.py", line 145, in decorated_function
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server migration.instance_uuid, exc_info=True)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server self.force_reraise()
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/compute/manager.py", line 122, in decorated_function
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server return function(self, context, *args, **kwargs)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/compute/manager.py", line 216, in decorated_function
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server kwargs['instance'], e, sys.exc_info())
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server self.force_reraise()
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/compute/manager.py", line 204, in decorated_function
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server return function(self, context, *args, **kwargs)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/compute/manager.py", line 3923, in resize_instance
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server self.instance_events.clear_events_for_instance(instance)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/usr/lib64/python2.7/contextlib.py", line 35, in __exit__
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server self.gen.throw(type, value, traceback)
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/compute/manager.py", line 6754, in _error_out_instance_on_exception
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server raise error.inner_exception
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server ResizeError: Resize error: Unable to resize disk down.
2017-08-01 23:06:41.707 7 ERROR oslo_messaging.rpc.server

Tags:

Zhaokun Fu (fuzhaokun) on 2017-08-01

Changed in nova:
status:	New → Confirmed
assignee:	nobody → Zhaokun Fu (fuzhaokun)
status:	Confirmed → In Progress

Revision history for this message

OpenStack Infra (hudson-openstack) wrote on 2017-08-01: Fix proposed to nova (master)

Fix proposed to branch: master
Review: https://review.openstack.org/489484

Sylvain Bauza (sylvain-bauza) on 2017-08-01

Changed in nova:
importance:	Undecided → Medium
tags:	added: libvirt resize

Zhaokun Fu (fuzhaokun) on 2017-08-01

Changed in nova:
status:	In Progress → Fix Committed

Revision history for this message

Sylvain Bauza (sylvain-bauza) wrote on 2017-08-01:

Please don't change the bug status to Fix Committed, it will automatically be changed to that once the change lands in Gerrit.

Changed in nova:
status:	Fix Committed → Confirmed
status:	Confirmed → In Progress

Revision history for this message

Brin Zhang (zhangbailin) wrote on 2018-12-17:

It's also related bug 1808728.
https://bugs.launchpad.net/nova/+bug/1808728

Revision history for this message

OpenStack Infra (hudson-openstack) wrote on 2019-05-30: Change abandoned on nova (master)

Change abandoned by Matt Riedemann (<email address hidden>) on branch: master
Review: https://review.opendev.org/489484
Reason: I'm going to abandon this since it's so old and I'm not getting replies to my questions. I don't think the complaints about xen or ironic drivers are likely valid (you can't migrate / resize baremetal instances anyway), but no one is following up on that assertion. We could discover the virt driver capability using traits if we want to be careful, but that requires some more thought and is a bigger change.

Matt Riedemann (mriedem) on 2019-05-30