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[OpenStack Infra <1823207@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/650092
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=8795f591d541227cd704019f19f3a78c74fc8ac7
Submitter: Zuul
Branch:    master

commit 8795f591d541227cd704019f19f3a78c74fc8ac7
Author: Matt Riedemann <mriedem.os@xxxxxxxxx>
Date:   Thu Apr 4 14:13:16 2019 -0400

    Do not log a warning about not using compute monitors
    
    The compute_monitors configuration option is empty by
    default, however, on nova-compute startup we get a warning
    logged saying:
    
      Excluding nova.compute.monitors.cpu monitor virt_driver. \
      Not in the list of enabled monitors (CONF.compute_monitors).
    
    This is unnecessary noise in the logs when nova-compute is
    not configured to use monitors, so this change avoids the warning
    log message in that case.
    
    The compute_monitors configuration option help text is also
    updated to (1) fix formatting and (2) remove the mention of the
    numa_mem_bw monitor which never made it into nova (see
    blueprint memory-bw).
    
    Change-Id: I5bd204e0017f6f795e3cf13b34b75124ee23aa78
    Closes-Bug: #1823207


** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1823207

Title:
  Annoying log on nova-compute startup with default configuration:
  "WARNING [nova.compute.monitors] Excluding nova.compute.monitors.cpu
  monitor virt_driver. Not in the list of enabled monitors
  (CONF.compute_monitors)."

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) ocata series:
  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
Status in OpenStack Compute (nova) stein series:
  Triaged

Bug description:
  The CPU monitor stuff in nova-compute is essentially frozen /
  deprecated and not enabled by default, but the compute service logs a
  warning on every startup that it's not being used - which if you've
  configured the service to not use it, great - who cares - we don't
  need a warning:

  http://logstash.openstack.org/#dashboard/file/logstash.json?query=message%3A%5C%22Excluding%20nova.compute.monitors.cpu%20monitor%20virt_driver.%20Not%20in%20the%20list%20of%20enabled%20monitors%20(CONF.compute_monitors).%5C%22%20AND%20tags%3A%5C%22screen-n-cpu.txt%5C%22&from=7d

  https://docs.openstack.org/nova/latest/configuration/config.html#DEFAULT.compute_monitors

  The help in that config option is also misleading since it mentions
  "numa_mem_bw" which does not exist in nova.

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