How to setup Node environment variable in Dockerfile for running node.js application?

Question

Can anyone suggest how can I setup NODE_ENV variable in dockerfile when running a node app.

Possible duplicate of [How to pass environment variables to docker containers?](http://stackoverflow.com/questions/30494050/how-to-pass-environment-variables-to-docker-containers) — Thilo, Mar 24 '17 at 06:00

score 34 · Answer 1 · edited Mar 25 '17 at 05:37

34

There a two ways, while building the image or when running the container.

For builds:

Add to your Dockerfile

ENV NODE_ENV=whatEver

Or use build arguments if you don't want them to stick during runtime Docker build --build-args NODE_ENV whatEver

When running:

Run your container with "-e"

docker run -e NODE_ENV=whatever mycontainer

edited Mar 25 '17 at 05:37

Chris Overgaauw

answered Mar 24 '17 at 06:24

opHASnoNAME

Can this be combined (does the runtime setting override the build-time setting)? – Thilo Mar 24 '17 at 11:49
3

yep it does override the image environment variable – opHASnoNAME Mar 24 '17 at 12:09

1 Answers1