Can I set up a container volume from the EBS volume on the host EC2 instance?

Rack (Version 2)
2

I just read through the “AWS EFS — The Container Friendly File System” blog post, and that explained a lot! I actually didn’t realize that Convox was already mounting an EFS volume at /volumes, so I already have a directory that is shared between all of the instances.

So if I use this format:

  volumes:
    - /var/lib/postgresql/data

Then Docker will create a new volume inside /volumes by default.

So if I specify an explicit path outside of the /volumes directory, then I guess this means I’m using EBS instead of EFS. E.g. something like:

  volumes:
    - /tmp/filecache:/tmp/filecache

UPDATE: Ahhhh, this doesn’t work. This creates a volume inside: /volumes/<myapp>/tmp/filecache

So it looks like I don’t have the option to mount a volume outside the /volumes directory.