Need help with 4-nodes cluster (2 HA domains)

M

MiksIr

New Member
Aug 26, 2014
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Configuration: 4 servers, all connected to FC SAN and will be use shared disk, fence device
I want to create 2 HA groups. Now I am trying to find how to save quorum if 2 nodes fail.
Probably it's about qdisk configuration.
Maybe someone already did it?
 
Theoretically yes, and probably i'll do it later? but... but it will great if in 5-nodes cluster... 3 can to fail =))
As I told, main idea - 2 failover domains, for example, nodes A1, A2, B1, B2, [C]
Cluster can do own job with one A and one B online, so why not if it possible.
At this moment I got stand for experiments and I want to try any solutions, so if has any ideas how to do it - tell me =)
 
make a small, reliable, quorom node. something from soekris or logicsupply with no moving parts. it only purpose is to hold quorom. sure, it can fail. but its cheap, doesnt take much space, and is less likely to fail than server nodes.
 
Ok, got it, thanks ;)
As I understand, QDisk not popular here :) Why? Is any hidden troubles?
 
Agree, but =)
Anyway I need solution for monitor FC link. Especially because I have not multipath.
QDisk can do it. If drop qdisk, need to write rule manual.
 
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