Comment 7 for bug 1794773

Reviewed: https://review.openstack.org/608611
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=e46019a6e52452554b85f5c40a6e4b069172cd9a
Submitter: Zuul
Branch: stable/queens

commit e46019a6e52452554b85f5c40a6e4b069172cd9a
Author: Mark Goddard <email address hidden>
Date: Thu Sep 27 15:32:36 2018 +0100

    Don't emit warning when ironic properties are zero

    If an ironic node is registered without either of the 'memory_mb' or
    'cpus' properties, the following warning messages are seen in the
    nova-compute logs:

    Warning, memory usage is 0 for <instance> on baremetal node <node>.
    Warning, number of cpus is 0 for <instance> on baremetal node <node>.

    As of the Stein release [1], the standard compute resources (VCPU,
    MEMORY_MB, DISK_GB) are not registered with placement for ironic nodes.
    They were not required to be set since the Pike release, but still this
    warning is emitted.

    This change removes these warning messages.

    Backport: rocky, queens, pike

    [1] https://review.openstack.org/#/c/565841/

    NOTE(mriedem): The original commit message on this change incorrectly
    said that [1] was made in Rocky but it was actually made in Stein.
    The important part is that the "memory_mb" and "cpus" properties on
    the node could be 0 since Pike and if they are 0, it just means
    that the related standard resource class inventory is not reported
    to the placement service and thus the warnings are noise.

    Change-Id: I342b9b12ec869431c3abad75eb8194c34151a281
    Closes-Bug: #1794773
    (cherry picked from commit 63b9c88386998bc584786ecb8ea7a2aae971a384)
    (cherry picked from commit 0794345ecd1d61efb7a0d321eb32844d2dd684d0)