On 2016-09-08 02:03, Digimer wrote:
You need to solve the problem with fencing in DRBD. Leaving it off WILL
result in a split-brain eventually, full stop. With working fencing, you
will NOT get a split-brain, full stop.
"Split brain is a situation where, due to temporary failure of all
network links between cluster nodes, and possibly due to intervention by
a cluster management software or human error, both nodes switched to the
primary role while disconnected."
-- DRBD Users Guide 8.4 # 2.9 Split brain notification.
About the only practical problem with *DRBD* split brain under pacemaker
is that pacemaker won't let you run "drbdadm secondary && drbdadm
connect --discard-my-data" as easy as busted ancient code did.
Dima
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