Comment 2 for bug 1715295

Reviewed: https://review.openstack.org/541225
Committed: https://git.openstack.org/cgit/openstack/novajoin/commit/?id=e2a15af973935a2be650b5fab28d12cb26f32e12
Submitter: Zuul
Branch: master

commit e2a15af973935a2be650b5fab28d12cb26f32e12
Author: Juan Antonio Osorio Robles <email address hidden>
Date: Mon Feb 5 17:06:36 2018 +0000

    Implement updating services based on update notifications

    This implements adding additional services via the metadata interface by
    reacting on the compute.instance.update notifications. This effectively
    covers updates from already enrolled nodes with some services towards
    adding new services.

    Note that this still requires folks to remove services manually if
    they're no longer used.

    Another important thing to note is that this doesn't yet cover updates
    from non-enrolled deployments to enrolling them and adding services.

    Related-Bug: #1715295
    Change-Id: I48ab94a184657f6730281740935a05143abbc499