[ClusterLabs] Creating pacemaker cluster starting with one node

[Eugen Block]

Hi,

that's how we usually set up our Openstack cluster(s). We bootstrap  
our first node so we have a single-node pacemaker cluster running all  
Openstack control services, then "join" the other control nodes,  
expanding the cluster.
I'd recommend to practice in a test cluster, that has helped me a lot!

Regards,
Eugen

Zitat von Tomas Jelinek <tojeline at redhat.com>:

> 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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