Comment 8 for bug 1374458

Reviewed: https://review.openstack.org/124418
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=eef97cdf4bb7f426d7feb394ef54510db8b1656b
Submitter: Jenkins
Branch: master

commit eef97cdf4bb7f426d7feb394ef54510db8b1656b
Author: Matt Riedemann <email address hidden>
Date: Fri Sep 26 07:31:49 2014 -0700

    Retry on closing of luks encrypted volume in case device is busy

    We're seeing races in the gate on detach of an encrypted volume where
    the device is busy so the detach fails, which causes the delete of the
    volume on the cinder side to fail because the volume is still in use and
    then Tempest times out waiting for the volume to be deleted.

    This simply adds a retry to close the encryption device. I use
    attempts=3 since that's what we use for lvremove.

    Closes-Bug: #1374458

    Change-Id: Ia0667da7dee247ba8c3338b296244b2a71d1045d