how do i put multiple commands in entrypoint along with /sbin/init?

[imperialguy]

The following will result in a container that exits immediately.

podman run -d  --entrypoint "/bin/sh" alpine -c '/sbin/init && echo hello'

I don't want the container exiting. For example, if I do the following, the container stays up and running.

podman run -d --entrypoint "/bin/sh" alpine -c '/sbin/init'

But, what I want is to be able to run commands after the /sbin/init.

Had to re-create this issue because #13026 was closed

[vrothberg]

@imperialguy, you can run podman exec on the container. Is that an alternative for what you want to do?

[imperialguy]

podman exec is an external stimulus. I am looking for something that will happen at the time of container initialization, without me having to trigger it externally. I even tried this, for e.g.:

podman run -d --name testc --entrypoint "/sbin/init" alpine:latest -c 'echo hellow > /root/sample'

The above will spin up a container that doesn't exit immediately. But, it doesn't create the /root/sample file during container init which is what I expect. So, this what happens:

podman exec testc ls -l /root/sample
ls: /root/sample: No such file or directory

[vrothberg]

I don't think that'll work since /sbin/init cannot run any command.

@rhatdan @edsantiago any ideas?

[edsantiago]

I've always just created a script with a sequence of commands, copied the script into the image, and used the script as the entrypoint.

[imperialguy]

I tried that as well. It exits the container. Here:

podman run -d -v /home/testuser/scratch:/root/scratch --name testc --entrypoint "/root/scratch/entry.sh" alpine:latest

Where, entry.sh just has the following two lines:

/sbin/init
echo "hello world" > /root/sample

But, here's the result. Basically, it exits the container immediately.

podman ps -a

CONTAINER ID  IMAGE                            COMMAND     CREATED         STATUS                     PORTS       NAMES
8226cebdd5e8  docker.io/library/alpine:latest              15 seconds ago  Exited (1) 16 seconds ago              testc

Is there something I am missing inside my entry.sh?

[vrothberg]

I am not sure that's going to work if we want to have /sbin/init as PID 1. If the script is run by sh, it'll be PID 1.

[rhatdan]

This is a discussion not an issue.