This issue was fixed in the openstack/nova queens-eol release.
** Changed in: nova/queens
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1838392
Title:
BDMNotFound raised and stale block devices left over when
simultaneously reboot and deleting an instance
Status in OpenStack Compute (nova):
Fix Released
Status in OpenStack Compute (nova) queens series:
Fix Released
Status in OpenStack Compute (nova) rocky series:
Fix Committed
Status in OpenStack Compute (nova) stein series:
Fix Committed
Status in OpenStack Compute (nova) train series:
Fix Committed
Bug description:
Description
===========
Simultaneous requests to reboot and delete an instance _will_ race as only
the call to delete takes a lock against the instance.uuid.
One possible outcome of this seen in the wild with the Libvirt driver
is that the request to soft reboot will eventually turn into a hard
reboot, reconnecting volumes that the delete request has already
disconnected. These volumes will eventually be unmapped on the Cinder
side by the delete request leaving stale devices on the host.
Additionally BDMNotFound is raised by the reboot operation as the
delete operation has already deleted the BDMs.
Steps to reproduce
==================
$ nova reboot $instance && nova delete $instance
Expected result
===============
The instance reboots and is then deleted without any errors raised.
Actual result
=============
BDMNotFound raised and stale block devices left over.
Environment
===========
1. Exact version of OpenStack you are running. See the following
list for all releases: http://docs.openstack.org/releases/
1599e3cf68779eafaaa2b13a273d3bebd1379c19 / 19.0.0.0rc1-992-g1599e3cf68
2. Which hypervisor did you use?
(For example: Libvirt + KVM, Libvirt + XEN, Hyper-V, PowerKVM, ...)
What's the version of that?
Libvirt + QEMU/kvm
2. Which storage type did you use?
(For example: Ceph, LVM, GPFS, ...)
What's the version of that?
N/A
3. Which networking type did you use?
(For example: nova-network, Neutron with OpenVSwitch, ...)
N/A
Logs & Configs
==============
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