[root@node ~]# cat /etc/systemd/system/docker.service
[Unit]
Description=Docker Application Container Engine
After=network.target

[Service]
Type=notify
ExecStart=/usr/bin/docker daemon -H tcp://0.0.0.0:2376 -H unix:///var/run/docker.sock --storage-driver devicemapper --tlsverify --tlscacert /etc/docker/ca.pem --tlscert /etc/docker/server.pem --tlskey /etc/docker/server-key.pem --label provider=digitalocean --selinux-enabled
ExecReload=/bin/kill -s HUP
MountFlags=slave
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Environment=

[Install]
WantedBy=multi-user.target