14 votes
Accepted

How to get DRBD nodes out of Connection State StandAlone (and WFConnection)?

The situation was apparently caused by a case of split-brain. I had not noticed this because I had only inspected recent journal entries for drbd.service (sudo journalctl -u drbd), but the problem ...
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  • 573
4 votes
Accepted

Why to use fencing when you already have redundant communication links?

The idea is that when your cluster decides it requires to fail-over a node, there must be something wrong with that node. Fencing, shooting the other node in the head (STONITH) is the best guarantee ...
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  • 70.8k
3 votes

multicast address use in corosync

You don't have to use multicast on corosync. You may use unicast to do your job. This can be done by using something like this in /etc/corosync/corosync.conf for a two-member cluster: compatibility: ...
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  • 478
2 votes

Correct use of Pacemaker's ocf-tester with OCF resource agents

DRBD can exist in many states, and therefore requires an additional master/slave set to be defined in Pacemaker that references the primitive which uses the ocf:libit:drbd resource agent. Resource ...
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2 votes
Accepted

crm status : 0 nodes and 0 resources configured

It seems you only have two nodes, you'd want to add this: quorum { provider: corosync_votequorum expected_votes: 2 }
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2 votes

crm status : 0 nodes and 0 resources configured

in totem section, you can try to add this line: rrp_mode: none If it still has error, try to add more this section: quorum { provider: corosync_votequorum expected_votes: 3 }
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1 vote
Accepted

Pacemaker location constraints on resources apparently not obeyed

I've overcome the problem by switching to another syntactic form for the location contraints that requires neither references to #id nor #uname: location loc_stonith_node1 stonith_node1 -inf: node1 ...
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  • 573
1 vote
Accepted

Correct use of Pacemaker's ocf-tester with OCF resource agents

Your error tells: Beginning tests for /usr/lib/ocf/resource.d/linbit/drbd... /usr/sbin/ocf-tester: 226: /usr/sbin/ocf-tester: xmllint: not found It doesn't have xmllint to test the agent, so first ...
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  • 26

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