Chapter 10. Removing the kubeadmin user
10.1. The kubeadmin user
OpenShift Container Platform creates a cluster administrator, kubeadmin, after the installation process completes.
This user has the cluster-admin role automatically applied and is treated as the root user for the cluster. The password is dynamically generated and unique to your OpenShift Container Platform environment. After installation completes the password is provided in the installation program’s output. For example:
INFO Install complete! INFO Run 'export KUBECONFIG=<your working directory>/auth/kubeconfig' to manage the cluster with 'oc', the OpenShift CLI. INFO The cluster is ready when 'oc login -u kubeadmin -p <provided>' succeeds (wait a few minutes). INFO Access the OpenShift web-console here: https://console-openshift-console.apps.demo1.openshift4-beta-abcorp.com INFO Login to the console with user: kubeadmin, password: <provided>
10.2. Removing the kubeadmin user
After you define an identity provider and create a new cluster-admin user, you can remove the kubeadmin to improve cluster security.
If you follow this procedure before another user is a cluster-admin, then OpenShift Container Platform must be reinstalled. It is not possible to undo this command.
Prerequisites
- You must have configured at least one identity provider.
-
You must have added the
cluster-adminrole to a user. - You must be logged in as an administrator.
Procedure
Remove the
kubeadminsecrets:$ oc delete secrets kubeadmin -n kube-system
