In a 2-node cluster where each node has two NICs connected to disjoint
networks, and thus 2 corosync rings, why would loss of communication on one
ring cause cluster failover?
We have the following setup...
LAN A
/====SWITCH====SWITCH====\
/ \
NODE_A NODE_B
\ /
\====SWITCH====SWITCH====/
LAN B
Everything on LAN A is physically separate from LAN B, different switches,
cables, power, etc. For some reason, when either LAN A or LAN B suffers a
failure, the cluster fails over. What would cause that?
This happened yesterday at 2:05 pm Pacific time. I have the corosync and
pacemaker logs from both nodes during that timeframe, but they are 20,000+
lines. I can see the failover happening (because everything was going along
normally, then the logs went nuts) but I don't understand why. Can someone tell
me what clues I should be looking for?
--
Eric Robinson
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