使用 kubectl 在 pod 中执行 bash 命令? [英] Execute bash command in pod with kubectl?

问题描述

我的问题很简单.

如何在 pod 中执行 bash 命令?我想用一个 bash 命令做所有事情?

How to execute a bash command in the pod? I want to do everything with one bash command?

[root@master ~]# kubectl exec -it --namespace="tools" mongo-pod --bash -c "mongo"
Error: unknown flag: --bash

因此，该命令被简单地忽略了.

So, the command is simply ignored.

[root@master ~]# kubectl exec -it --namespace="tools" mongo-pod bash -c "mongo"
root@mongo-deployment-78c87cb84-jkgxx:/# 

差不多吧.

[root@master ~]# kubectl exec -it --namespace="tools" mongo-pod bash mongo
Defaulting container name to mongo.
Use 'kubectl describe pod/mongo-deployment-78c87cb84-jkgxx -n tools' to see all of the containers in this pod.
/usr/bin/mongo: /usr/bin/mongo: cannot execute binary file
command terminated with exit code 126

如果它只是一个 bash，它当然可以工作.但我想立即跳入 mongo shell.

If it's just a bash, it certainly works. But I want to jump into the mongo shell immediatelly.

我找到了一个解决方案，但它不起作用.告诉我这现在是否可能?执行多个命令(或从 shell 执行)脚本)在 kubernetes pod 中

I found a solution, but it does not work. Tell me if this is possible now? Executing multiple commands( or from a shell script) in a kubernetes pod

谢谢.

推荐答案

双破折号--"用于将要在容器内运行的命令与 kubectl 参数分开.所以正确的做法是:

The double dash symbol "--" is used to separate the command you want to run inside the container from the kubectl arguments. So the correct way is:

kubectl exec -it --namespace=tools mongo-pod -- bash -c "mongo"

您忘记了--"之间的空格和bash".

You forgot a space between "--" and "bash".

要执行您可能需要的多个命令:

To execute multiple commands you may want:

• 创建一个脚本并将其作为一个卷挂载到您的 Pod 中并执行它

• to create a script and mount it as a volume in your pod and execute it

使用脚本启动一个侧容器并运行它

to launch a side container with the script and run it

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