If you are running etcd, and need to check a few thing / see the status of your cluster, use the included hacks.
My teammate and I setup OpenShift: Node Feature Discovery. We wanted to load labels for specific use-cases. I stumbled across Node Feature Discovery: Advanced Configuration, so I edited the NodeFeatureDiscovery resource – nfd-instance.
This post helps those who are stuck with “Application is not available” on the OpenShift Console on IBM Virtual Private Cloud (VPC).
For the last few weeks, I’ve been working with the OpenShift Kube Descheduler and OpenShift Kube Descheduler Operator.
I posted some test-cases for the seven Descheduler Profiles to demonstrate how the Profiles operate under specific conditions. Note these are unsupported test cases.
In OpenShift, the kube-scheduler binds a unit of work (Pod) to a Node. The scheduler reads from a scheduling queue the work, retrieves the current state of the cluster, scores the work based on the scheduling rules (from the policy) and the cluster’s state, and prioritizes binding the Pod to a Node. These nodes are scheduled based on an instantaneous read of the policy and the environment and a best-estimation placement of the Pod on a Node. With best estimate at the time, these clusters are constantly changing shape and context; there is a need to deschedule and schedule the…
A brief Operator training I gave to my team resulted in these notes. Thanks to many others in the reference section. An Operator codifies the tasks commonly associated with administrating, operating, and supporting an application. The codified tasks are event-driven responses to changes (create-update-delete-time) in the declared state relative to the actual state of an application, using domain knowledge to reconcile the state and report on the status.
This document outlines the installation of the OpenShift on Power, the installation of the Red Hat Single Sign-On Operator and configuring the two to work together on OCP. Thanks to Zhimin Wen who helped in my setup of the OIDC with his great work. Steps Setup OpenShift Container Platform (OCP) 4.x on IBM® Power Systems™ Virtual Server on IBM Cloud using the Terraform based automation code using the documentation provided. You’ll need to update var.tfvars to match your environment and PowerVS Service settings. At the end of the deployment, you see an output pointing to the Bastion Server. Add Hosts Entry Connect via SSH You’re connecting on…
built a demonstration using GoLang, JSON, bcrypt, http client, http server to model an actual IDP. This is a demonstration only; it really helped me setup/understand what’s happening in the RequestHeader.