Comment 4 for bug 1690159

Reviewed: https://review.openstack.org/464205
Committed: https://git.openstack.org/cgit/openstack/manila/commit/?id=f41e3c220c209aab35691e95a6db3a8ac303ea09
Submitter: Jenkins
Branch: master

commit f41e3c220c209aab35691e95a6db3a8ac303ea09
Author: Thomas Bechtold <email address hidden>
Date: Fri May 12 15:54:48 2017 +0200

    Retry backend initialization

    Since commit 4b87f6f40d1f09b4, exceptions in the init_host() call (which is
    called for every backend) are catched and backends might end up
    uninitialized and unusable. This might be okish (but is not good) in a
    multi-backend scenario but is definitely wrong in a single backend scenario.
    In that case, the manila-share process would successfully start but the
    backend would never be usable.
    So retry to initialize the driver for every backend in case there was an error
    during initialization. That way even a temporary broken backend can be
    initialized later without restarting manila-share.

    Change-Id: I2194c61fa9e9bdb32d252284eea1864151d9eef7
    Closes-Bug: #1690159