Daein Park

Daein Park is a Senior OpenShift Technical Support Engineer in Japan. He has started his career as a Java Software Engineer, and has been experienced various e-commerce projects as an Infrastructure Engineer. He is also an active Open Source contributor and passionates about ServiceMesh, Serverless.

Areas of Expertise

Kubernetes,Containers,DevOps,Automation,Service Mesh,Serverless

Recent Posts

How to maintain stable build and deployment performance on Red Hat OpenShift

How to maintain stable build and deployment performance on Red Hat OpenShift

In this article, I will introduce helpful, common tips for managing reliable builds and deployments on Red Hat OpenShift. If you have experienced a sudden performance degradation for builds and deployments on OpenShift, it might be helpful to troubleshoot your cluster. We will start by reviewing the whole process, from build to deployment, and then cover each aspect in more detail. We will use Red Hat OpenShift 4.2 (Kubernetes 1.14) for this purpose.

Continue reading “How to maintain stable build and deployment performance on Red Hat OpenShift”

Share
Pod Lifecycle Event Generator: Understanding the “PLEG is not healthy” issue in Kubernetes

Pod Lifecycle Event Generator: Understanding the “PLEG is not healthy” issue in Kubernetes

In this article, I’ll explore the “PLEG is not healthy” issue in Kubernetes, which sometimes leads to a “NodeNotReady” status. When understanding how the Pod Lifecycle Event Generator (PLEG) works, it is helpful to also understand troubleshooting around this issue.

What is PLEG?

The PLEG module in kubelet (Kubernetes) adjusts the container runtime state with each matched pod-level event and keeps the pod cache up to date by applying changes.

Continue reading “Pod Lifecycle Event Generator: Understanding the “PLEG is not healthy” issue in Kubernetes”

Share