Is it supposed to automatically create the specified subdir?

[criverapr]

I was trying this tutorial: https://sysadmins.co.za/container-persistent-storage-for-docker-swarm-using-a-glusterfs-volume-plugin/

My GlusterFS version is 3.13.2. I'm not sure if it is just a permissions issue, but when I try this in my compose file:

volumes:
  vol1:
    driver: glusterfs
    name: "gfs/vol1"

The container doesn't have the gluster mount, but if I do the following:

volumes:
  vol1:
    driver: glusterfs
    name: "gfs"

It works fine, but the data is put into the root of the volume. The first option works fine if I create the "vol1" directory before running the stack, and this is why I think it may just be a permissions issue. What should be the permissions set at the filesystem level on the gluster volume mount?