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Can't `ssh` and the `docker exec` in a single command

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Xavi Montero

I want to ssh into a remote server that runs a docker engine and then docker exec a bash in my-nice-container, in interactive mode. I want to do all in one shot.

I'm doing this from my local computer:

ssh my-site-with-a-docker-engine.example.com docker exec -it my-nice-container bash

I get this error: "the input device is not a TTY"

Question: How can I force the ssh to notify the other side that we are really an interactive terminal?

Note 1:

If I do this command "splitted", it works:

  1. I first ssh,
  2. I then from inside the ssh I type-in the docker exec.

Note 2:

Non-interactive commands work well. For example this works:

ssh [email protected] docker ps -a
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Xavi Montero

Found. It was -t. A first look at the man page https://linux.die.net/man/1/ssh and searching for the words "terminal" and "interactive" did not resolve, this is why I asked.

Then I found that "-t Force pseudo-tty allocation."

This is checked to work:

ssh -t my-site-with-a-docker-engine.example.com docker exec -it my-nice-container bash
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