[ClusterLabs] Creating pacemaker cluster starting with one node

[Tomas Jelinek]

Hi Andreas,

 From the point of view of pcs, pacemaker and corosync, it is possible 
to create a one-node cluster, run resources in it, and  add another node 
afterwards. Obviously, when the single node is lost for whatever reason, 
there is no other node to run the resources.

You should also consider whether the cluster's workload supports this 
and what steps are necessary to make it work in this scenario.

Regards,
Tomas


Dne 31. 07. 25 v 8:46 Andreas Mock napsal(a):
> Hi all,
> 
> I have to upgrade an old pacemaker cluster consisting of two nodes. 
> (There is no chance of rolling update).
> 
> Is it possible to create a pacemaker “cluster” starting with only one 
> node and afterwards attach the second node?
> 
> Best regards
> 
> Andreas
> 
> 
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