Is it possible to assign a volume name using an environment variable?

[andres-root]

I'm trying to create a volume using an environment variable I previously set up in my Dockerfile. However when I ran the project, fig created a folder with the name of my environment variable, instead of assign its value. I put the code below:

web:
build: .
volumes:
- ${WORKSPACES_HOME}/logs:/webapp/myapp/logs/

I used to do it in docker with the next sintax:
docker run -v ${WORKSPACES_HOME}/logs:/webapp/myapp/logs

[dnephin]

The "docker" way is actually bash taking care of the substitution, not docker.

I don't think this is possible yet, but I think it could be with https://docs.python.org/2/library/os.path.html#os.path.expandvars

I can probably add it to #442

[szuliq]

This is great and should be documented as part of https://docs.docker.com/compose/yml/#volumes