pgupgrade with no downtime

[fara-tode]

Overview

please provide the option to perform pgupgrade on pgcluster with at least 2 replicas with no downtime.

Use Case

strict SLAs

Desired Behavior

perform an upgrade on secondary first, after upgrade ensure secondary is in sync with leader, switchover to upgraded instance and upgrade other instances.

Environment

• Platform: Kubernetes

Additional Information

[dsessler7]

Hey @fara-tode! Just wanted to let you know that we have a story in our backlog to add this capability.