In the previous article, we learnt about QoS classes in Kubernetes and how Kubernetes evicts Pods if node resources are running out. Now it’s time to be familiar with the PriorityClass resource in Kubernetes. Imagine you have a bunch of Pods with the same QoS class in the worker node…

You know how Kubernetes decide to find which Pods should be evicted if node resource is not enough or is running out? In this article, we’ll talk about this and introduce Kubernetes Quality of Service classes related to this topic. What is Node Pressure? Node pressure is a term that explains the worker node’s…

As you know, recently, Kubernetes changed its main repository from k8s.gcr.io to registry.k8s.io, meaning you should update your manifests as soon as possible. In this note, I tell you how you can find running Pods using the legacy Kubernetes image registry. https://kubernetes.io/blog/2023/03/10/image-registry-redirect The following command list all running Pods in…

What really is dnsPolicy in Pod spec, and when should we change it? By setting the dnsPolicy option in Pod spec, you define how DNS requests should be resolved. If you want to resolve DNS requests with just the internal DNS server, or you want to use the internal…

Long time no see! After a long time, I got a chance to release and continue the complete Jenkins tutorial. In this article, we will learn how to use Git in our pipelines. Using Git is a most important topic in CI/CD pipelines as we store everything in Git, our…

In access-limited clusters where you don’t have access to cluster resources, you may need worker nodes’ info like worker node name, node…

Do you want to know which images are downloaded and available on your worker nodes? If yes, you need to run the following command.

In some applications, the application configurations are set by default in the codebase (hard-coded) and if you want to override them, you can provide your override values through environment variables. Sometimes and for some configurations, it doesn’t matter if the override values exist. However, you want to make sure the…

Sometimes you want to create configs/secrets for your applications, and you want to make sure when configs/secrets got created, nobody can…