Run a Container for Analysis

It can be helpful to execute a command such as ping or dig from inside a cluster. By doing this it is possible to see the response, which a pod would get. This might be valuable to analyze DNS or other network connection error.

Starting a BusyBox container

kubectl run busybox --image=busybox:1.33 --rm -it --restart=Never /bin/sh

Starting a Ubuntu container

kubectl run ubuntu --image=ubuntu --rm -it --restart=Never /bin/bash

Explanation

• run, create and run a container
• busybox/ubuntu, is the name of the container and can be replaced by any valid name
• rm, delete the container image after execution
• it, interactive terminal
• restart=Never, after termination the container should not restart; default behavior of Kubernetes