[Bugs] [Bug 1337387] Add arbiter brick hotplug

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1337387



--- Comment #2 from Vijay Bellur <vbellur at redhat.com> ---
COMMIT: http://review.gluster.org/14502 committed in release-3.8 by Niels de
Vos (ndevos at redhat.com) 
------
commit ade1d726e035eea4540894b03c82b84304bba2ae
Author: Ravishankar N <ravishankar at redhat.com>
Date:   Fri Apr 29 17:41:18 2016 +0530

    cli/glusterd: add/remove brick fixes for arbiter volumes

    Backport of: http://review.gluster.org/14126

    1.Provide a command to convert replica 2 volumes to arbiter volumes.
    Existing self-heal logic will automatically heal the file hierarchy into
    the arbiter brick, the progress of which can be monitored using the
    heal info command.

    Syntax: gluster volume add-brick <VOLNAME> replica 3 arbiter 1
    <HOST:arbiter-brick-path>

    2. Add checks when removing bricks from arbiter volumes:
    - When converting from arbiter to replica 2 volume, allow only arbiter
      brick to be removed.
    - When converting from arbiter to plain distribute volume, allow only if
      arbiter is one of the bricks that is removed.

    3. Some clean-up:
    - Use GD_MSG_DICT_GET_SUCCESS instead of GD_MSG_DICT_GET_FAILED to
    log messages that are not failures.
    - Remove unused variable `brick_list`
    - Move 'brickinfo->group' related functions to glusted-utils.

    Change-Id: Ifa75d137c67ffddde7dcb8e0df0873163e713119
    BUG: 1337387
    Signed-off-by: Ravishankar N <ravishankar at redhat.com>
    Reviewed-on: http://review.gluster.org/14502
    Smoke: Gluster Build System <jenkins at build.gluster.com>
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.com>
    Reviewed-by: Atin Mukherjee <amukherj at redhat.com>

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