PGO pod deployment in master node?

[Ganesh Natarajan]

Hi Team,

I have a question wrt PGO pod placement in a multi-node on-premises k8s cluster.  

We deploy a '1 master + 2 Replicas' PGDB cluster. We have 3 dedicated nodes for the PGDB instances, so that each PGDB instance gets scheduled on an independent node. 

Should we run the PGO pod in a node where there is no PGDB instance running? Consider a case, when a node restarts in which a PGDB instance as well as the PGO instance are running. Then PGO may not be able to perform the necessary recovery till it comes up in a new node or in an existing node. To address these kinds of issues, does it make sense to schedule the PGO pod in a node different from the PGDB instances?

Thanks,

Ganesh.