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Environment variable using docker-compose is always null

#docker#docker-compose
CAIOHOBORGHI

CAIOHOBORGHI

Environment variable using docker-compose is always null

How to use environment variables with docker without using phoenix?

With Phoenix it works but with only elixir is always null.

14 comments
#docker#docker-compose
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Marked As Solved

NobbZ

NobbZ

This runs mix during build time of the container. At that point in time docker-compose has not yet set the environment.

You want to use CMD or ENTRYPOINT depending on your exact needs.

2
Post #19

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stefanchrobot

stefanchrobot

It works the same. Just make sure you’re not fetching the ENV variables in config/config.exs or config/prod.exs - those are evaluated at build time. Either use config/runtime.exs or read in the app.

1
Post #2
stefanchrobot

stefanchrobot

web:
  environment:
    - DEBUG=1
1
Post #13

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