Troubleshoot an MKE 4 cluster

Troubleshooting is a necessary part of cluster maintenance. This section provides you with the tools you need to diagnose and resolve the problems you are likely to encounter in the course of operating your cluster.

• Runbook: etcd membership control-plane, which addresses the node add/node remove commands as they apply to control planes scope.
• Runbook: MKE 3.9.5 to MKE 4.2.0 upgrade, etcd v2store-clean workaround, which addresses the mkectl 4.2.0 upgrade failure at [Migrate MKE 3 Nodes].