Question 192338 in Docker Question posted in
The official documentation can be found here.

Change UID and GID in alpine docker container

I want to change an alpine-based container user’s UID and GID.

But there’s no usermod and groupmod. Are there equivalents?

(This is for a running container, not an image.)

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    This is my workaround (must be put in an entrypoint script):

    $ id bob
uid=1000(bob) gid=1000(bob) groups=1000(bob),1000(bob)

$ apk --no-cache add shadow                              # <-----
$ groupmod --gid 2000 bob
$ usermod --uid 2000 --gid 2000 bob
$ apk del shadow

$ id bob
uid=2000(bob) gid=2000(bob) groups=2000(bob),2000(bob)

    Please let me know if there's a way to do this without installing anything.


  2. 0

    Assuming the group and user exist before the container is created you can simply run the container with the proper user:group uid:gid.

    The docker run command can be passed a user and group (or uid / gid).

    docker run --user 2000:2000 acme

    Or, via compose, the user: attribute can be used.

    compose.yml

    services:
  acme:
    image: my-alpine:latest
    user: 2000:2000
    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search