Question 38258 in Ubuntu Question posted in
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How to create a pod and attach with a terminal later on – Ubuntu

I want to run a multi-container pod, and interactuate with it via a terminal.
With kubectl run -ti I can run a monocontainer pod and attach easily to it.

I think I have to kubectl apply to create a complex pod, and later attach to it.

I’ve tried this and it doesn’t work:

  kubectl run alpine --image alpine                                                                       pod/alpine created

  kubectl attach -i alpine                                                                                      If you don't see a command prompt, try pressing enter.
error: unable to upgrade connection: container alpine not found in pod alpine

I’m using latest k3s v1.25.4+k3s1 under a Linux host (Ubuntu 22.04).

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2

Answers


  1. Chosen as BEST ANSWER
    0

    This does work:

      kubectl run alpine --image alpine --command sleep -- 999d                                               
pod/alpine created

  kubectl exec -ti alpine -- ash                                                                                
/ #

    I need an auxiliary sleep.


  2. 0

    You need attach interactively first:

    kubectl run -it alpine --image alpine

    Then detach by using CTRL-P, then CTRL-Q

    To reattach, you then use:

    kubectl attach alpine -c alpine -i -t

    Note that if you close the shell at any point, you terminate the pod, and it will restart

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