Set docker image username at container creation time?

Question

I have an OpenSuse 42.3 docker image that I\'ve configured to run a code. The image has a single user(other than root) called \"myuser\" that I create during the initial Image g

Answer 1

First of all (https://docs.docker.com/engine/reference/builder/#arg):

Warning: It is not recommended to use build-time variables for passing secrets like github keys, user credentials etc. Build-time variable values are visible to any user of the image with the docker history command.

But if you still need to do this, read https://docs.docker.com/engine/reference/builder/#arg:

A Dockerfile may include one or more ARG instructions. For example, the following is a valid Dockerfile:

FROM busybox
ARG user1
ARG buildno
...

and https://docs.docker.com/engine/reference/builder/#user:

The USER instruction sets the user name (or UID) and optionally the user group (or GID) to use when running the image and for any RUN, CMD and ENTRYPOINT instructions that follow it in the Dockerfile.

USER [:] or
USER [:]