docker/docker.service

[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
ExecStart=/usr/bin/docker daemon -H fd:// --containerd /run/containerd/containerd.sock $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
# KillMode=process is not necessary because of how we set up containerd.

[Install]
WantedBy=multi-user.target