How to refer a env variable in a docker compose as part of volumes creation

Question

In docker compose, is there any possibility to use env variable to instead direct values.

volumes: - /opt:$$VARIABLE

ERROR: compose.cli.main.main: The Compose file './docker-compose.yml' is invalid because:

please let me know is there any way to do this.

vivekyad4v · Accepted Answer · 2019-12-26 07:53:41Z

1

Docker compose support environment variables out of the box but volumes must have an absolute path.

Export variable -

$ export VARIABLE=vijay

Change in compose -

volumes:
  - /opt:/home/${VARIABLE}

answered Dec 26, 2019 at 6:51

vivekyad4v

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2 Comments

it is not working, however i am using env file to do inject variables to access. It seems to be volumes is expecting absolute path to specify.!

Yes, variables will expand but you need to specify absolute path, have updated the answer.