Docker beta13.1 issue with named volume persistence

README.md

This test case works as expected in both Docker for Mac beta13.1 and Docker Toolbox on Windows 10. However, I am having problems getting postgres data to persist in named volumes on beta13.1, where a very similar docker-compose.yml does this fine on Docker Toolbox.

Next step: make a standalone test case and post it to the Docker for Mac beta forum.

docker-compose.yml

version: '2'

services:
  named-volume-test:
    build: .
    command: ["/bin/sh", "-c", "echo 'hello world' >> /mnt/data/hello.txt"]
    volumes:
     - nvt:/mnt/data

volumes:
  nvt: {}

Dockerfile

FROM busybox
RUN /bin/mkdir -p /mnt/data && /bin/touch /mnt/data/hello.txt
VOLUME ["/mnt/data"]