github.com/flavio/docker@v0.1.3-0.20170117145210-f63d1a6eec47/contrib/init/systemd/docker.service (about)

     1  [Unit]
     2  Description=Docker Application Container Engine
     3  Documentation=https://docs.docker.com
     4  After=network.target docker.socket firewalld.service
     5  Requires=docker.socket
     6  
     7  [Service]
     8  Type=notify
     9  # the default is not to use systemd for cgroups because the delegate issues still
    10  # exists and systemd currently does not support the cgroup feature set required
    11  # for containers run by docker
    12  ExecStart=/usr/bin/dockerd -H fd://
    13  ExecReload=/bin/kill -s HUP $MAINPID
    14  LimitNOFILE=1048576
    15  # Having non-zero Limit*s causes performance problems due to accounting overhead
    16  # in the kernel. We recommend using cgroups to do container-local accounting.
    17  LimitNPROC=infinity
    18  LimitCORE=infinity
    19  # Uncomment TasksMax if your systemd version supports it.
    20  # Only systemd 226 and above support this version.
    21  #TasksMax=infinity
    22  TimeoutStartSec=0
    23  # set delegate yes so that systemd does not reset the cgroups of docker containers
    24  Delegate=yes
    25  # kill only the docker process, not all processes in the cgroup
    26  KillMode=process
    27  # restart the docker process if it exits prematurely
    28  Restart=on-failure
    29  StartLimitBurst=3
    30  StartLimitInterval=60s
    31  
    32  [Install]
    33  WantedBy=multi-user.target