如何在Kubernetes中从命令行运行容器(如docker run)? [英] How do I run a container from the command line in Kubernetes (like docker run)?

问题描述

我想从Kubernetes集群的命令行中运行一个一次性容器Pod.我正在寻找的等效项:

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

是否有等效的kubectl?

推荐答案

最简单的方法是:

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

注释:

• 这将显示一个名为tmp-shell的整体Deployment.只要您使用kubectl run，就会发生这种情况.
• --rm确保退出外壳程序时删除此Deployment及其所有组件.如果省略了--rm，则可以使用kubectl delete deploy/tmp-shell手动将其删除.
• 如果要脱离外壳并使其具有重新连接的能力，请省略--rm.退出外壳后，您将可以重新连接:kubectl attach $pod-name -c $pod-container -i -t.

• 如果您的外壳未启动，请检查您的集群是否资源不足(kubectl describe nodes).您可以通过--requests

• This will bring up a whole Deployment named tmp-shell. This happens any time you use kubectl run.
• --rm ensures this Deployment and all of its components are deleted when you exit the shell. If you omitted --rm, you can delete it manually with kubectl delete deploy/tmp-shell.
• If you want to detach from the shell and leave it running with the ability to re-attach, omit the --rm. You will then be able to reattach with: kubectl attach $pod-name -c $pod-container -i -t after you exit the shell.

• 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:

--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.

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

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