Comment 2 for bug 1952985

Reviewed: https://review.opendev.org/c/openstack/charm-ceph-mon/+/822061
Committed: https://opendev.org/openstack/charm-ceph-mon/commit/b8af44aefacacb286da1c56a5fcde6f5a5511ffb
Submitter: "Zuul (22348)"
Branch: master

commit b8af44aefacacb286da1c56a5fcde6f5a5511ffb
Author: Edin Sarajlic <email address hidden>
Date: Fri Dec 17 08:45:02 2021 +0800

    Add nagios check for expected number of OSDs

    This check does not require manually setting the number of expected
    OSDs.

    Initially, the charm sets the count (per-host) to that of what's
    present in the OSD tree. The count will be updated (on a per-host
    basis) when the number of OSDs grows, but not when it shrinks. There
    is a charm action to reset the expected count using information from
    the OSD tree.

    Closes-Bug: #1952985
    Change-Id: Ia6a060bf151908c1d4159e6bdffa7bfe1f0a7988