6.6. Replacing a failed bare-metal control plane node without BMC credentials


If a control plane node on your bare-metal cluster has failed and cannot be recovered, but you installed your cluster without providing baseboard management controller (BMC) credentials, you must take extra steps in order to replace the failed node with a new one.

6.6.1. Prerequisites

  • You have identified the unhealthy bare metal etcd member.
  • You have verified that either the machine is not running or the node is not ready.
  • You have access to the cluster as a user with the cluster-admin role.
  • You have taken an etcd backup in case you encounter any issues.
  • You have downloaded and installed the coreos-installer CLI.
  • Your cluster does not have a control plane machineset. You can check for machinesets by running the following command:

    $ oc get machinesets,controlplanemachinesets -n openshift-machine-api
    중요

    There should be only one or more machinesets for the workers. If controlplanemachinesets exists for the control plane, do not use this procedure.

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