CODEWITHSUNDEEP
docker
Ahmad Ismail
Ahmad Ismail

Reputation: 13962

When to use `--attach` with `docker container run`?

I found that -

By default, when no option is provided to the docker run command, the root process is started in the foreground. This means that the standard input, output, and error from the root process are attached to the terminal session.

So, what is the difference between $ docker container run -ait ubuntu & $ docker container run -it ubuntu?

When to use --attach with docker container run?

Upvotes: 3

Views: 1891

Answers (1)

Shashank V
Shashank V

Reputation: 11243

If you do not specify -a then Docker will attach to both stdout and stderr when running in foreground mode. You can use --attach option to attach to specific streams instead. 

-a=[]           : Attach to `STDIN`, `STDOUT` and/or `STDERR`

docker run -a stdin -a stdout -i -t ubuntu /bin/bash

Upvotes: 3

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