- Red Hat OpenShift Container Platform (RHOCP) 4
- Is masters (control plane) resizing a supported day-2 operation?
- How more resources can be added to the master nodes without reinstalling the cluster?
At the time when this article is being written (current major latest version: 4.6), a rolling update resizing for the master nodes (shut down one of the master nodes, modify its memory and/or CPU and start up again) is possible if your infrastructure allows it.
- Make sure that the rest of the masters are completely healthy before removing or shutting down one of them.
- Removing or shutting down a master may be a risky operation in an overloaded or unhealthy cluster. You can open a support case if your cluster is in this situation, you have to increase the hardware of your master nodes and you need some guidance.
- A documentation Bugzilla (1958766) targets to amend the current note on master resizing supportability.
- Red Hat OpenShift Container Platform
- Performance tune
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