Comment 9 for bug 2000630

Reviewed: https://review.opendev.org/c/openstack/charm-ceph-osd/+/876456
Committed: https://opendev.org/openstack/charm-ceph-osd/commit/ad59f1bda762cbb75ed2cd2be758135eee2ffc36
Submitter: "Zuul (22348)"
Branch: stable/quincy.2

commit ad59f1bda762cbb75ed2cd2be758135eee2ffc36
Author: Samuel Walladge <email address hidden>
Date: Wed Jan 4 15:59:04 2023 +1030

    Save the crash module auth key

    Read the key set on the mon relation,
    and use ceph-authtool to save it to a keyring,
    for use by the crash module for crash reporting.

    When this auth key is set, the crash module (enabled by default)
    will update ceph-mon with a report.
    It also results in a neat summary of recent crashes
    that can be viewed by `ceph health detail`.
    For example:

    ```
    $ juju ssh ceph-mon/leader -- sudo ceph health detail

    HEALTH_WARN 1 daemons have recently crashed
    [WRN] RECENT_CRASH: 1 daemons have recently crashed
        osd.1 crashed on host node-3 at 2023-01-04T05:25:18.218628Z
    ```

    ref. https://docs.ceph.com/en/latest/mgr/crash/

    See also https://review.opendev.org/c/openstack/charm-ceph-mon/+/869138
    for where the client_crash_key relation data set is implemented.

    Depends-On: https://review.opendev.org/c/openstack/charm-ceph-mon/+/869138

    Closes-Bug: #2000630
    Change-Id: I77c84c368e6665e4988ebe9a735f000f99d0b78e
    (cherry picked from commit 97be046f9b541067193c50323e00657110184f97)