Description of problem:
While enabling the autoscaling in the RHOSP setup doesn't work as by default "instance_discovery_method=libvirt_metadata" is set in ceilometer.conf

After changing the value to "naive" it starts working

Version-Release number of selected component (if applicable):
RHOSP13

How reproducible:
Setup the env as per doc: https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html/auto_scaling_for_instances/configuring_auto_scaling_for_compute_instances


Actual results:
Doesn't work with default value

Expected results:
Should work as expected

Additional info:
Here is the upstream bug: https://bugs.launchpad.net/charm-ceilometer-agent/+bug/1749954

The state remains in "insufficient data"

(overcloud) [stack@sbdtel-hcm-ospd autoscaleout]$ openstack alarm list
+--------------------------------------+--------------------------------------------+-------------------------------------+-------------------+----------+---------+
| alarm_id                             | type                                       | name                                | state             | severity | enabled |
+--------------------------------------+--------------------------------------------+-------------------------------------+-------------------+----------+---------+
| d85cbb4d-5125-4502-a73a-9181ff5cbb52 | gnocchi_aggregation_by_resources_threshold | example-cpu_alarm_high-yhwhsf64mxuc | insufficient data | low      | True    |
| 1d2aa76a-2aa6-4b2a-bc6a-458bc6d684bd | gnocchi_aggregation_by_resources_threshold | example-cpu_alarm_low-5qtd35xpu2cx  | insufficient data | low      | True    |