[Bugs] [Bug 1473133] dht/cluster: rebalance/ remove-brick should honor min-free-disk

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1473133



--- Comment #6 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: https://review.gluster.org/17832 committed in release-3.10 by
Shyamsundar Ranganathan (srangana at redhat.com) 
------
commit 7daeae73d9edfa181f8e86394fb6dfc68b22440f
Author: Susant Palai <spalai at redhat.com>
Date:   Mon Apr 17 13:00:54 2017 +0530

    cluster/dht: Skip file migration if the subvol that meets min-free-disk

    ... criteria happens to be the same subvol containing data-file

    Rebalance need to figure out a new subvol in case the hashed subvol
    does not have enough space. In the process of figuring out the new subvol,
    we need to ignore the source subvol, otherwise it will lead to data loss.

    Test: Manual
    Ran the following
    sizeof /tmp/1: 1.5GB
    sizeof /brick/1: 16GB
    sizeof /tmp/2: 1.5GB
    <start>

    glusterd;  gluster v create test1 vm1:/brick/1 vm1:/tmp/1;
    gluster v start test1;
    mount -t glusterfs vm1:test1 /mnt;
    for i in {1..2000}
    do
    dd if=/dev/zero of=/mnt/file$i bs=1KB count=1 &> /dev/null;
    done
    gluster v add-brick test1 vm1:/tmp/2
    gluster v set test1 min-free-disk 12GB
    gluster v remove-brick test1 vm1:/tmp/1 star
    <end>

    file count and data were intact.

    > Change-Id: Ib8fc8467a3d48a7c12958824c4f0b88e160b86c1
    > BUG: 1441508
    > Signed-off-by: Susant Palai <spalai at redhat.com>
    > Reviewed-on: https://review.gluster.org/17064
    > 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: Raghavendra G <rgowdapp at redhat.com>
    > Signed-off-by: Susant Palai <spalai at redhat.com>

    Change-Id: Ib8fc8467a3d48a7c12958824c4f0b88e160b86c1
    BUG: 1473133
    Signed-off-by: Susant Palai <spalai at redhat.com>
    Reviewed-on: https://review.gluster.org/17832
    Smoke: Gluster Build System <jenkins at build.gluster.org>
    Tested-by: Shyamsundar Ranganathan <srangana at redhat.com>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    Reviewed-by: Shyamsundar Ranganathan <srangana at redhat.com>

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