How do I run a single container from the command line in a Kubernetes cluster (like docker run)?

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How do I run a single container from the command line in a Kubernetes cluster (like docker run)?



I would like to run a one-off container Pod from the command line in my Kubernetes cluster. I am looking for the equivalent of:


docker run --rm -it centos /bin/bash



Is there a kubectl equivalent?


kubectl




1 Answer
1



It looks like the simplest way is:


kubectl run tmp-shell --rm -i --tty --image centos -- /bin/bash



Notes:


Deployment


tmp-shell


kubectl run


--rm


Deployment


--rm


kubectl delete deploy/tmp-shell


--rm


kubectl attach $pod-name -c $pod-container -i -t



If your shell does not start, check whether your cluster is out of resources (kubectl describe nodes). You can control the resources this deployment is requesting with --requests:


kubectl describe nodes


--requests


--requests='': The resource requirement requests for this container. For example, 'cpu=100m,memory=256Mi'. Note that server side components may assign requests depending on the server configuration, such as limit ranges.



(Inspired by https://gc-taylor.com/blog/2016/10/31/fire-up-an-interactive-bash-pod-within-a-kubernetes-cluster)






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