Comment 23 for bug 1432387

Reviewed: https://review.opendev.org/c/openstack/cinder/+/689486
Committed: https://opendev.org/openstack/cinder/commit/d2f6ec5569b1c1b68f567392cfc03a6476169b4b
Submitter: "Zuul (22348)"
Branch: master

commit d2f6ec5569b1c1b68f567392cfc03a6476169b4b
Author: Gorka Eguileor <email address hidden>
Date: Fri Oct 18 15:51:13 2019 +0200

    Remove file locks once we delete a resource

    File locks are never removed from the system, so they keep increasing in
    the locks directory, which can become problematic.

    In this patch we start trying to delete these lock files when we delete
    a volume or a snapshot.

    This affects the 2 type of file locks we currently have:
    - Using oslo lockutils synchronized with external=True
    - Using coordination.synchronized when deployed in Active-Passive and no
      DLM

    This will alleviate the ever increasing files in the locks directory.
    Deployment tools should implement a service that runs when the host is
    booting and cleans of the locks directory before the OpenStack services
    are started.

    Partial-Bug: #1432387
    Change-Id: Ic73ee64257aeb024383c6cb79f2e8c04810aaf69