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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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