Comment 2 for bug 1443910

Reviewed: https://review.openstack.org/246343
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=337a1b029a1f144f577a78712413a4182dd525f8
Submitter: Jenkins
Branch: master

commit 337a1b029a1f144f577a78712413a4182dd525f8
Author: Mark McLoughlin <email address hidden>
Date: Tue Nov 17 10:17:44 2015 +0000

    servicegroup: remove the zookeeper driver

    We have had a "untested and risky to use in production" log warning
    message for this driver since Kilo, it is currently broken (see below),
    there are no obviously active users or contributors, and we are planning
    on enabling Zookeeper usage by adopting the tooz library.

    bug #1443910 shows that the driver fails to load because eventlet 0.17
    broke evzookeeper by moving _SocketDuckForFd from eventlet.greenio to
    eventlet.greenio.py2 in commit 449c90a. The 0.17 release was in Feb,
    2015. The evzookeeper library hasn't been updated since Sep 2012 and the
    sole maintainer is the original author of the zookeeper servicegroup
    driver.

    The tooz driver spec - Ibf70c2dbe308fc8e4dd277d8c75c4445b3dfce90 -
    proposes a formal deprecation period for the zk driver, during which
    existing zk driver users are encouraged to move to tooz. However, given
    the state of the zk driver, we must conclude that there are no existing
    users who need a graceful migration path. Removing the driver will
    avoid potential confusion for new users and simplify the path to
    adopting tooz.

    Closes-Bug: #1443910
    Closes-Bug: #1414517
    Closes-Bug: #1414536

    Signed-off-by: Mark McLoughlin <email address hidden>
    Change-Id: I2dba71e71b1ed7cf8476e8bfe9481e84be5df128