[ClusterLabs] DRBD split brain after Cluster node recovery

[ArekW]

Hi, I have stonith run and tested. The problem was that there is
mistake in drbd documentation. The 'fencing' belongs to net (not
disk). I also try to use more handlers

handlers {
    fence-peer "/usr/lib/drbd/crm-fence-peer.sh";
    after-resync-target "/usr/lib/drbd/crm-unfence-peer.sh";
    split-brain "/usr/lib/drbd/notify-split-brain.sh root";
    out-of-sync "/usr/lib/drbd/notify-out-of-sync.sh root";
}

net {
    fencing resource-and-stonith;
}