title: initdb: could not change permissions of directory on Postgresql container
body: <p>I am new to the docker ecosystem and I am trying to spin up a simple postgres container along with a volume so it persists its data, by using a yaml composer file. The file is as follows:</p>
  
  <pre><code># Use postgres/example user/password credentials
  version: '3.3'
  services:
      db:
          image: postgres
          environment:
              POSTGRES_DB: recrow
              POSTGRES_USER: recrow
              POSTGRES_PASSWORD: recrow_db_1000
              PGDATA: /var/lib/pgsql/data/pgdata
          volumes:
            - ./pgsql/data:/var/lib/pgsql/data/pgdata
  </code></pre>
  
  <p>However, upon calling <code>docker-compose -f stack.yml up</code> I get the following error:</p>
  
  <blockquote>
    <p>fixing permissions on existing directory
    /var/lib/postgresql/data/pgdata ... initdb: could not change
    permissions of directory "/var/lib/postgresql/data/pgdata": Operation
    not permitted</p>
  </blockquote>
  
  <p><code>/var/lib/pgsql/data/pgdata</code> is supposed to be a directory relative to the container's root, while <code>./pgsql/data</code> is a path on the host. I am running the container from an ntfs-3g partition mounted on <code>/mnt/storage</code>. What could be the problem? I am also running docker without root permissions, by adding my user to the docker group and this user also has full access to the beforementioned mount point <code>/mnt/storage</code>.</p>