To understand container terminology, it’s very important to understand exactly what a container is — with technical precision. A container is really two different things. Like a normal Linux program, containers really have two states — rest and running. When at rest, a container is a file (or set of…

In app modernization era, managing resource utilization is very essential to contain the costs and limit energy consumption. kube-green is a Kubernetes operator that allows to shut down environments or specific resources in order to optimize resource utilization, limiting energy waste. What is an Operator? An operator is a Kubernetes-native application…

One of the most common questions I get as a openshift professional, “What is the difference between a liveness and a readiness probe?” The kubelet uses liveness probes to know when to restart a container. For example, liveness probes could catch a deadlock, where an application is running, but unable…

When it comes to OpenShift Container Platform 3, you are usually working with three roles for nodes: master, compute, and infrastructure (infra). OpenShift Container Platform 4 instead, by default, provides master and worker roles. There is no infra node in OpenShift 4 out-of-box(by default). When migrating from OpenShift 3 to…

OpenShift API Connection lost … There are many issue on day 2 day basis on openshift but the one I am describing here in this blog is quite interesting issue I have seen this issue recently in one of environment, Where OpenShift login is not working , OpenShift API connection lost. As OpenShift administrator what…

Some of the most common problem you may run it with kubernetes/OpenShift nodes or with kubelet service and In this article we will look at it how to troubleshoot the node issue. We will see some common node/machine troubleshooting steps on OCP 3.11 and OCP 4.x As you all know…

Before we actually start talking about router lets understand how pods and services are running on the cluster. When you create your OpenShift Container Platform cluster, pods and services running on the cluster are each allocated their own IP addresses. The IP addresses are accessible to other pods and services…

Red Hat Advanced Cluster Management for Kubernetes provides the tools and capabilities to address various challenges with managing multiple clusters and consoles, distributed business applications, and inconsistent security controls across Kubernetes clusters that are deployed on-premises, or across public clouds. Red Hat Advanced Cluster Management for Kubernetes provides end-to-end management…

This article will be helpful for those who all are working with Redhat OpenShift platform , and below steps will be helpful if you want to rebuild or replace master node with new node in the cluster. Before we start node rebuild activity lets talk about the etcd backup and…