CODEWITHSUNDEEP
dockerenvironment-variables
arnerossmann
arnerossmann

Reputation: 7

replace ENV values of Dockerfile at runtime

I've got a similar problem. My Dockerfile

FROM busybox

ENV foo dev
ENV bar xyz

COPY run.sh /

ENTRYPOINT ["/bin/sh", "/run.sh"]

the run.sh file:

#!/bin/bash

echo $foo $bar

After building I run: docker run example --env "foo=Hallo Welt" but I get the output: dev xyz

So somehow docker doesn't replace my ENV values. What am I making wrong?

Upvotes: 0

Views: 1172

Answers (1)

Paolo
Paolo

Reputation: 25999

All arguments specified after the name of the image are treated as input arguments to the container, as opposed to flags to Docker.

Move the name of the image at the end of the command:

$ docker run --env "foo=Hallo Welt" example
Hallo Welt xyz

Upvotes: 3

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