[Bugs] [Bug 1365822] [RFE] cli command to get max supported cluster.op-version

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1365822



--- Comment #6 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: http://review.gluster.org/16283 committed in master by Atin Mukherjee
(amukherj at redhat.com) 
------
commit 76fbeafbf56a61768c81f622b354e3c95a00e986
Author: Samikshan Bairagya <samikshan at gmail.com>
Date:   Mon Dec 19 15:07:14 2016 +0530

    glusterd: Get maximum supported op-version in a cluster

    gluster volume get <VOLNAME> cluster.opversion gives us the current
    op-version on which the cluster is operating. There is no command
    that lets the user know the maximum supported op-version that the
    cluster can run on.

    This patch adds a new global option cluster.max-op-version, that
    can be used to retrieve the maximum supported op-version in a
    cluster.

    Usage:
        # gluster volume get all cluster.max-op-version

    Example output:

    Option                                  Value
    ------                                  -----
    cluster.max-op-version                  30900

    NOTE: The only way to test this feature for now is to set the
    GD_OP_VERSION_MAX macro to different values (30800 for 3.8,30900
    for 3.9, and so on) and rebuild glusterd. Since the regression test
    framework currently doesn't have support to simulate these tests,
    there are no accompanying regression tests for this feature. It
    should be possible to add tests once glusto comes in and makes it
    easier to run a heterogeneous cluster.

    Change-Id: I547480ee5e7912664784643e436feb198b6d16d0
    BUG: 1365822
    Signed-off-by: Samikshan Bairagya <samikshan at gmail.com>
    Reviewed-on: http://review.gluster.org/16283
    Smoke: Gluster Build System <jenkins at build.gluster.org>
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    Reviewed-by: Atin Mukherjee <amukherj at redhat.com>

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