[Unit]
Description=Docker Application Container Engine
Documentation=http://docs.docker.com
After=network.target docker.socket containerd.socket
Requires=docker.socket containerd.socket

[Service]
EnvironmentFile=/etc/sysconfig/docker

# Quick rundown of options, so we can keep track of them. Upstream's
# service file only contains -H.
#
# * -H tells Docker that it's running as a socket-activated service.
# * --containerd tells Docker to not manage the running of containerd.
# * --add-runtime and --default-runtime tell Docker to not try to use
#   its "bundled" runC version (which is not shipped by us) but rather use
#   the runC version provided as by the runc package.
ExecStart=/usr/bin/dockerd -H fd:// --containerd /run/containerd/containerd.sock --add-runtime oci=/usr/sbin/runc --default-runtime oci $DOCKER_NETWORK_OPTIONS $DOCKER_OPTS
ExecReload=/bin/kill -s HUP $MAINPID

# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity

# Uncomment TasksMax if your systemd version supports it.
# Only systemd 226 and above support this property.
#TasksMax=infinity

# Set delegate yes so that systemd does not reset the cgroups of docker containers
# Only systemd 218 and above support this property.
#Delegate=yes

# Tis is not necessary because of how we set up containerd.
#KillMode=process

[Install]
WantedBy=multi-user.target