Comment 3 for bug 1473044

Reviewed: https://review.openstack.org/200784
Committed: https://git.openstack.org/cgit/openstack/manila/commit/?id=39b92fd9ebd978db16b2367c39582aea72d4f71a
Submitter: Jenkins
Branch: master

commit 39b92fd9ebd978db16b2367c39582aea72d4f71a
Author: Csaba Henk <email address hidden>
Date: Sat Jul 11 03:02:42 2015 +0200

    glusterfs_native: delete_snapshot(): find out real GlusterFS snap name

    So far the delete_snapshot() logic assumed that a GlusterFS snapshot
    exists with exactly the same name as the Manila snapshot id.

    This was a fragile assumption -- both GlusterFS and Manila can
    potentially change how the GlusterFS snapshots are named.
    (And currently we have a problem as GlusterFS has actually changed
    this -- see referred bug about details.)

    Therefore from now on we'll use the weaker assumption that the
    Manila snapshot id is a substring of the backing GlusterFS snapshot
    name. (That's a robust assumption, unlikely to break in the future.)
    The actual GlusterFS snapshot name is found by doing a
    `gluster snapshot list` and grepping for the Manila snapshot id in
    it.

    Change-Id: I40873208c7431e42885bee4db06d6229a202bad6
    Closes-Bug: #1473044