github.com/daaku/docker@v1.5.0/contrib/init/systemd/docker.service (about)

     1  [Unit]
     2  Description=Docker Application Container Engine
     3  Documentation=http://docs.docker.com
     4  After=network.target docker.socket
     5  Requires=docker.socket
     6  
     7  [Service]
     8  ExecStart=/usr/bin/docker -d -H fd://
     9  MountFlags=slave
    10  LimitNOFILE=1048576
    11  LimitNPROC=1048576
    12  
    13  [Install]
    14  WantedBy=multi-user.target