Comment 2 for bug 1960518

Reviewed: https://review.opendev.org/c/openstack/tripleo-common/+/828721
Committed: https://opendev.org/openstack/tripleo-common/commit/80b294ba884ca8ae67137a9885e02edef0b08d4e
Submitter: "Zuul (22348)"
Branch: master

commit 80b294ba884ca8ae67137a9885e02edef0b08d4e
Author: Cédric Jeanneret <email address hidden>
Date: Thu Feb 10 15:38:05 2022 +0100

    Ensure failures on the undercloud leads to a complete stop

    With tripleo_free strategy, we might hit situation where the undercloud
    is unreachable for some reasons, preventing external tasks to happen on
    the overcloud nodes.

    This is especially true for older releases, such as train, where
    mistral was still used in order to orchestrate the different playbooks
    and runs.

    Change-Id: I278fdc9597f83f1dc8390569be9716d3c8847dc4
    Closes-Bug: #1960518