It should be relatively easy to write a functional regression test
similar to
https://review.openstack.org/#/c/545123/5/nova/tests/functional/wsgi/test_servers.py
but for this scenario.
** Changed in: nova
Status: New => Triaged
** Changed in: nova
Importance: Undecided => Medium
** Also affects: nova/queens
Importance: Undecided
Status: New
** Also affects: nova/pike
Importance: Undecided
Status: New
** Also affects: nova/rocky
Importance: Undecided
Status: New
** Changed in: nova/pike
Status: New => Triaged
** Changed in: nova/queens
Status: New => Triaged
** Changed in: nova/queens
Importance: Undecided => Medium
** Changed in: nova/rocky
Status: New => Triaged
** Changed in: nova/rocky
Importance: Undecided => Medium
** Changed in: nova/pike
Importance: Undecided => Medium
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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1806064
Title:
Volume remains in attaching/reserved status, if the instance is
deleted after TooManyInstances exception in nova-conductor
Status in OpenStack Compute (nova):
Triaged
Status in OpenStack Compute (nova) pike series:
Triaged
Status in OpenStack Compute (nova) queens series:
Triaged
Status in OpenStack Compute (nova) rocky series:
Triaged
Bug description:
If a number of instances are booted from volumes in parallel and some
of the build requests failed in nova-conductor with exception
TooManyInstances [1] because of the setting quota.recheck_quota=True
being set in nova.conf, some instances will end up in the ERROR state.
If we delete this instances, their volumes will remain in
attaching(Pike)/reserved(Queens) state.
This bug is related to https://bugs.launchpad.net/nova/+bug/1404867
Steps to reproduce:
0. Set quota.recheck_quota=True, start several nova-conductors.
1. Set VCPU quota limits for the project to 1.
2. Create two instances with 1 VCPU in parallel.
3. One of this instances will be created and one will end up in the
ERROR state. Or both of them will be in ERROR state.
4. Delete instances.
5. Volumes from errored instances will not be available, they can't be
attached, they can't be deleted without permision in
volume:force_delete cinder policy.
This bug exists at least in Pike (7ff1b28) and Queens (c5fe051).
---
[1]
https://github.com/openstack/nova/blob/stable/rocky/nova/conductor/manager.py#L1308
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