[ClusterLabs] resources configured in the nodes are removed automatically after split-brain

[S Sathish S]

Hi Team,

Any update on below query .

Thanks and Regards,
S Sathish S
From: S Sathish S
Sent: Friday, October 30, 2020 2:36 PM
To: 'users at clusterlabs.org' <users at clusterlabs.org>
Cc: Anandan Gunasekar <gunasekar.anandan at globallogic.com>
Subject: resources configured in the nodes are removed automatically after split-brain

Hi Team,

The version of pacemaker rpm's being used is:
corosync-2.4.4 -->  https://github.com/corosync/corosync/tree/v2.4.4<https://protect2.fireeye.com/v1/url?k=f922dd52-a6b9e479-f9229dc9-866038973a15-a5f3de1dbfc1c39a&q=1&e=524f71fb-249f-4239-a262-2fc78f9ad31c&u=https%3A%2F%2Fgithub.com%2Fcorosync%2Fcorosync%2Ftree%2Fv2.4.4>
pacemaker-2.0.2 --> https://github.com/ClusterLabs/pacemaker/tree/Pacemaker-2.0.2<https://protect2.fireeye.com/v1/url?k=c7032bdb-989812f0-c7036b40-866038973a15-7901e2417b6e6fb9&q=1&e=524f71fb-249f-4239-a262-2fc78f9ad31c&u=https%3A%2F%2Fgithub.com%2FClusterLabs%2Fpacemaker%2Ftree%2FPacemaker-2.0.2>

Issue Details:-

Two nodes (Node 1 and Node2 ) will be joined in the Cluster lab's pcs cluster.
Node 1 is configured and resources are added in it and then Node 2 is planned to add with Node1
While joining the Node 2 with Node 1, looks like the split brain and quorum voting issue happened and some time later both the nodes rejoined as a cluster.
But the resources configured in the Nodes are removed automatically.

Expectation:-
In our application we have not configured FENCING/STONITH as per the needs.
So can you help us to know why the resources are getting removed after the split brain (or) quorum voting issue occurred in the node.
Also kindly let us know if any prevent steps available to prevent the automatic resource deletion.

Logs and Other details:-

PCS STATUS output from Node 1:-
[image.png]
Corosync log snipped in Node 2:-
[image.png]
PCS STATUS command output from Node 1 (resource are removed automatically)
[image.png]

Logs Attached (both nodes):-

  *   Corosync log
  *   cib file
  *   pcs and crm command output

Thanks and Regards,
S Sathish S
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