bash script switch user with exec

Asked May 07 '20 at 08:50

Active May 07 '20 at 10:44

Viewed 373 times

I would like to run a docker entrypoint that creates a new user, switches to that user and destroys root shell so it cannot be exited back into

In the command line this works

$ useradd -s /bin/bash toby
$ exec su toby

If I exit from it the container stops which is as expected.

But, when I put this in a script the root shell is still there and can be exited into

--- NOTE ---
Sorry, I got things mixed up.
This actually works as intended when I use the script as ENTRYPOINT

I didn't put username in the dockerfile as I want it be assigned on docker run as in

docker run -e USER=$USER myimage

edited May 07 '20 at 10:44

asked May 07 '20 at 08:50

Tomasz

`I put this in a script the root shell is still there and can be exited into` How do you execute the script? – KamilCuk May 07 '20 at 08:57
1

why not simply using `USER toby` right before the end of the Dockerfile instead of `exec su toby`? – Stefano May 07 '20 at 09:21
Add `ARG ${NEWUSER}` after `FROM image:tag` then do `RUN useradd -s /bin/bash ${NEWUSER} \ USER ${NEWUSER}` to switch to that user? – vijay v May 07 '20 at 13:32
I wanted the username to be assigned on run – Tomasz Mar 31 '21 at 23:48

0 Answers0