Docker: Set value of ENV variable using RUN command?

Question

I'm writing a Dockerfile to set up my customized WordPress environment. I'm starting with ubuntu:latest and would like to add some repositories dynamically, by setting an ENV variable to the codename of the current Ubuntu version. How can I do this, or is there a better way to achieve this?

Ben Whaley · Accepted Answer · 2014-07-22 17:25:28Z

6

Start your container like this: docker run -e VAR=value -e ANOTHER_VAR=another_value .... VAR and ANOTHER_VAR will be available in the container's environment.

answered Jul 22, 2014 at 17:25

Ben Whaley

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