K8s Troubleshooting — Node NotReady

K8s Troubleshooting handbook

We all know that a K8s node is a physical or virtual machine participating in a K8s cluster, which can be used to run pods. When a node shuts down or crashes or kubelet process is having issue, the node enters the NotReady state, meaning it cannot be used to run pods. All stateful pods running on the node then become unavailable.