Ultimate docker on OSX collection - mapping docker files to local

Yes, you’ve heard, and have looked around here, here, or maybe here, it’s different to Linux with a simple volume mapped to your local machine. In OSX world, Docker is working in a VirtualBox…

So the file permission got be a problem, you can’t simply change its group or permission, neither. let’s fix it.

The idea is like this:

  • Everything in Docker operate as normal.
  • Create a new docker container that serves a ssh endpoint.
  • Connect to that ssh point, and get access to the file system inside our docker.
  • Get deeper, map the files of docker volume to local file system.

Let’s get started.

Run your containers as normal.

Go to your docker-compose directory, edit the file docker-compose.yml.

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sshd:
  image: 'krlmlr/debian-ssh'
  ports:
    - '2222:22'
  environment:
    - SSH_KEY=ssh-rsa AAAAxxxx_ssh_rsa_pub_content rankun203@gmail.com
  volumes_from:
    - data
  working_dir: /var/www/html

Run it

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docker-compose up sshd

Mount the docker file system to your local file system:

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sshfs -p 2222 root@youdar.dev:/var/www/html ~/docker/nhweb -oauto_cache,reconnect,defer_permissions,noappledouble,negative_vncache,volname=nhweb

Notes:

  • volname=nhweb is the directory name of the mount point.
  • ~/docker/nhweb is the mount point.
  • These options are selected for more friendly and less errors.

Now your local folder ~/docker/nhweb are just the same as inside the Docker, but with the right access rights.

Notes:

  • All the file created by you will on the name of root user inside the docker.
  • If you want to use another limited user with sudo permission, use docker.

References: