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

[Service]
EnvironmentFile=/etc/sysconfig/docker

# While Docker has support for socket activation (-H fd://), this is not
# enabled by default because enabling socket activation means that on boot your
# containers won't start until someone tries to administer the Docker daemon.
Type=simple
ExecStart=/usr/bin/dockerd --containerd /run/containerd/containerd.sock --add-runtime oci=/usr/bin/docker-runc $DOCKER_NETWORK_OPTIONS $DOCKER_OPTS
ExecStartPost=/usr/lib/docker/docker_service_helper.sh wait
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

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

[Install]
WantedBy=multi-user.target