Interpolate variables in environment variables definition with docker-compose.yml

Question

How can I interpolate env vars when using docker-compose . if I have a following vars.env file :

VAR_1=value_1
VAR_2=value_1/value2
VAR_3=value_1/value3

I would like to interpolate using of VAR_1 like this

VAR_1=value_1
VAR_2=${VAR_1}/value2
VAR_3=${VAR_1}/value3

But it is not working. Any idea ?

dnephin · Accepted Answer · 2016-09-27 15:38:07Z

1

This is not supported. You can however use an .env file to set the value of $VAR_1: https://docs.docker.com/compose/env-file/

answered Sep 27, 2016 at 15:38

dnephin

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