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Red Hat OpenShift Administration II: Operating a Production Kubernetes Cluster (DO280)

Configure, manage, and troubleshoot OpenShift clusters and containerized applications

Red Hat OpenShift Administration II: Operating a Production Kubernetes Cluster (DO280) prepares OpenShift Cluster Administrators to perform daily administration tasks on clusters that host applications provided by internal teams and external vendors, enable self-service for cluster users with different roles, and deploy applications that require special permissions such as such as CI/CD tooling, performance monitoring, and security scanners. This course focuses on configuring multi-tenancy and security features of OpenShift as well as managing OpenShift add-ons based on operators.

The skills you learn in this course can be applied using all versions of OpenShift, including Red Hat OpenShift on AWS (ROSA), Azure Red Hat OpenShift, and OpenShift Container Platform.

This course is based on OpenShift Container Platform 4.12.

5-10 Course Topics

  • Deploying packaged applications using manifests, templates, kustomize, and helm.
  • Configuring authentication and authorization for users and applications.
  • Protecting network traffic with network policies and exposing applications with proper network access.
  • Deploying and managing applications using resources manifests.
  • Enabling developer self-service of application projects.
  • Managing OpenShift cluster updates and Kubernetes operator updates.

Target Audience

  • System Administrators and Platform Operators interested in the ongoing management of OpenShift clusters, applications, users, and add-ons.
  • Site Reliability Engineers interested in the ongoing maintenance and troubleshooting of Kubernetes clusters.
  • System and Software Architects interested in understanding the security of an OpenShift cluster.

Recommended Training

Technology considerations

  • This course requires internet access to access the cloud-based classroom environment that provides an OpenShift cluster and a remote administrator’s workstation.
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2 Replies

Having a problem with the network-review lab and I'm not sure where else to post this other than possibly opening a support ticket.

After going through the lab twice I get hung up at the same spot, step 6.2.  And when I say hung, I mean I can initiate a connection but it just hangs there. I've checked the yaml files against the provided solutions to ensure they're typo for typo compatible.  Finally tracked down what may be the problem to the "product" pod giving the following error:

Warning  Unhealthy  11m (x2 over 11m)   kubelet   Readiness probe failed:  Get "":  dial tcp connect: connection refused

I've double checked that by restarting the lab and the pod comes up that way, so I'm pretty sure it's nothing I did.  Since the success or failure of the student in the lab depends on that working, it's a bit of a stumbling block.

The version number of the course is Revision: do280-4.12-fe9e5fe, if that helps any.


I'm having a problem with the guided exercice "Resource Manifests". I'm unable to start the lab with this error in the logs "labs.ui.step.StepFatalError: A final step has failed". It seems like the cluster API is not UP from the script's standpoint even though the API is fully functional. I deleted and created the lab but the issue is still pending.

Have you even face this kind of issue ?
Your help will be highly appreciated.

Best regards,
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