Comment 4 for bug 1930446

o/ I'm writing functional tests for openstack/charm-ceilometer-agent [0][1] that are validating which metrics get published depending on what we put in polling.yaml.

I'm hitting consistently this issue, i.e. I can reproduce it consistently in our test gate [2]

Fail to get domain uuid 9539cf3b-1448-43d8-aff6-93becd57392e metadata, libvirtError: metadata not found: Requested metadata element is not pre
sent: libvirt.libvirtError: metadata not found: Requested metadata element is not present

This is hitting us both on Ubuntu 20.04 and 21.04, but only starting with Wallaby (ceilometer 16.0.0-0ubuntu1~cloud0). All older releases from Rocky to Victoria (ceilometer 15.0.0-0ubuntu2~cloud0) are fine (validated in combination with Ubuntu 18.04, 20.04 and 20.10 where applicable).

[0] https://github.com/openstack-charmers/zaza-openstack-tests/pull/615
[1] https://review.opendev.org/c/openstack/charm-ceilometer-agent/+/803359
[2] https://bugs.launchpad.net/charm-ceilometer-agent/+bug/1938884