Comment 9 for bug 1979093

Reviewed: https://review.opendev.org/c/openstack/python-tripleoclient/+/847980
Committed: https://opendev.org/openstack/python-tripleoclient/commit/186d7f4e4cd1b931918bbb375f62b4fb9d48375e
Submitter: "Zuul (22348)"
Branch: stable/wallaby

commit 186d7f4e4cd1b931918bbb375f62b4fb9d48375e
Author: John Fulton <email address hidden>
Date: Mon Jun 27 14:45:35 2022 -0400

    Limit standalone ceph-admin user creation to a single host

    When 'openstack overcloud ceph user enable --standalone' is
    run, call Ansible with '--limit undercloud'.

    Bug #1979093 happened because Ansible was running the user
    module on the same host as if it were two hosts. The module
    is idempotent but not race safe. E.g. when user execution A
    and user execution B are run on the same host, A's check that
    the user does not exist might be true but before A goes on to
    create the user, B could have created it first depending on
    scheduling.

    The python-tripleoclient uses Ansible --limit when creating
    the ceph-admin user so only _admin nodes get the private key.
    This works for multinode but standalone only has one node, so
    for that condition redefine the limit list to that single node.

    Change-Id: I2f62cdfcb88edb5552cbd7351b6240f78376c93d
    Closes-Bug: #1979093
    (cherry picked from commit 5ee23cf83def70b541858958659dc33a6bb5b0b6)