I want to pass environment variables in my docker run command and access them in my entrypoint shell script.
This is my super simple Dockerfile for test purposes:
FROM ubuntu:20.04
WORKDIR /
ADD entrypoint.sh .
RUN chmod 755 entrypoint.sh
ENTRYPOINT [ "/entrypoint.sh" ]
And this is the entrypoint.sh:
#!/bin/sh
printf "env var TEST = ${TEST} "
I just build the Dockerfile like this: docker build -t test:1.0 .
And then run it like this: docker run -i test:1.0 -e TEST='Hello world'
Unfortunately the output is not containing the env var.
For the record: Predefining the variables is not the solution.
The order of the args is important, like David Maze said.
# incorrect
docker run -i test:1.0 -e TEST='Hello world'
# correct
docker run -i -e TEST='Hello world' test:1.0