Set environment variable inside a podman's container by shell script

Question

Usign podman container with AlmaLinux on board.

I need to setup a set of environment variable after starting the container. So I put into the container a script setenv.sh with contents:

#!/bin/sh
export MYVAR=value
echo $MYVAR

Now I am running the container:

$ podman run --rm -it -init almatest bash
% /opt/myapp/bin/setenv.sh
value
% echo $MYVAR

% env | grep MYVAR
%

Where is my variable? What is going on?

Edit: Executing the script with . or source does prevent the environment variables from disappearing. Ok, I gues that answers my original question.

I know about the -env for the podman, but cannot use it - the container is a test environment for the production which would not have a podman. I need to do all setups from inside the container.

Answer 1

I know where I went wrong.

The setup.sh is a script which is supposed to be run first. And I thought about it, like it is a .bashrc, so export in the setup.sh should work as in .bashrc. And that was the source of my mistake.

The intended role of the script is not a real one.

So the call of setup.sh should be done by source command.