Reading env variables with custom app

[ekevu123]

I am trying to install a custom app written in Phoenix Elixir.

My dockerfile ends with that:

ADD start.sh /app/start.sh
RUN chmod +x /app/start.sh
CMD [ "/app/start.sh" ]

Earlier, I set my environment variables like that:

ENV SECRET_KEY_BASE=default

Here is my startup script:

#!/bin/bash

set -eu

# Load environment variables
source ./env.list

# Start PROGRAM
exec ./_build/prod/rel/PROGRAM/bin/PROGRAM start

But the environment variables don't seem to be read properly, so the app doesn't start in Cloudron. What am I doing wrong?

[robi]

are they set in env.list ?

[ekevu123]

Yes, in this format:
SECRET_KEY_BASE=KEY

I learned now that I can run them via Cloudron CLI using cloudron set env, but I wonder if it was still possible to do that automatically.

[robi]

what if you included them as part of the exec?

[ekevu123]

Do you mean to put the exact keys into the dockerfile? I tried that with ENV SECRET_KEY_BASE=KEY, but it didn't work.

[robi]

No, that's a different part of the build/install process.

The envs need to be available as you launch the app.

[ekevu123]

How would this look like then?

[robi]

First, I'd define them explicitly in the startup script, to see if the exec can see them then.

So instead of source .env , export ENV=KEY

[ekevu123]

Yes, that works, thank you!