Variable substitution in docker-compose.yml file when running docker-compose with sudo

Question

I'm currently trying to use variable substitution in a docker-compse.yml file. This file contains the following:

jenkins:
  image: "jenkins:${JENKINS_VERSION}"
  external_links:
      - mongodb:mongo
  ports:
    - 8000:8080

The image below shows what happens when I try to start everything up.

As you can see, docker-compose shows a warning saying that the variable is not set. I suspect this is caused due to the use of sudo to start docker-compose. My setup (a Jenkins docker container which has access to docker and docker-compose via volume mounts) currently requires the use of sudo. Would it be better to stop docker requiring sudo, or is there another way to fix this without changing the current setup?

try adding docker to your user group, so that you don t have to use sudo again and again. Also logout and login again in your user group to make it working. — XOR-Manik
– XOR-Manik, Commented Feb 29, 2016 at 21:34
You could set the var in a script and then launch compose from the script passing it the var — danday74
– danday74, Commented Feb 29, 2016 at 22:19

dnephin · Accepted Answer · 2016-03-01 03:30:29Z

1

sudo -E preserve the user environment when running the command. It should do what you want.

answered Mar 1, 2016 at 3:30

dnephin

28.4k9 gold badges58 silver badges46 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Koningh Over a year ago

This works! To clarify, I use the following command to make it work: JENKINS_VERSION=123 sudo -E docker-compose up

Koningh Over a year ago

I'm wondering if there is a way to do this with multiple variables? JENKINS_VERSION=123 && JENKINS_TEST=456 sudo -E docker-compose up is not working (obviously) and I don't like adding variables to a sudoers file or something like that.

Koningh Over a year ago

Found it! export JENKINS_VERSION=123 && export JENKINS_TEST=456 && sudo -E docker-compose up

dnephin Over a year ago

I think you can just leave them space delimited and it will work JENKINS_VERSION=123 JENKINS_TEST=456 sudo -E docker-compose up

Collectives™ on Stack Overflow

Variable substitution in docker-compose.yml file when running docker-compose with sudo

1 Answer 1

4 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Related