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releasenote: Add known issue for bug #1894804 

Related-Bug: #1882521
Change-Id: Ib9059dde41b0a07144ffa26552577308b1ffc9e1
This commit is contained in:
Lee Yarwood 2020-09-18 10:45:21 +01:00
parent 9fa563666e
commit 57ac83d4d7
1 changed files with 15 additions and 0 deletions
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releasenotes/notes/bug-1894804-c03c20cd983c3192.yaml Normal file
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---
issues:
- |
`bug 1894804`_ documents a known device detachment issue with QEMU
``4.2.0`` as shipped by the Focal ``20.04`` Ubuntu release. This can lead
to the failure to detach devices from the underlying libvirt domain of an
instance as QEMU never emits the correct ``DEVICE_DELETED`` event to
libvirt. This in turn leaves the device attached within libvirt and
OpenStack Nova while it has been detached from the underlying QEMU process.
Subsequent attempts to detach the device will also fail as it is no longer
found within the QEMU process.
There is no known workaround within OpenStack Nova to this issue.
.. _bug 1894804: https://bugs.launchpad.net/qemu/+bug/1894804