docker build -t mabitt/openvpn .
docker run -d --name openvpn --privileged -p 1194:1194 -p 1194:1194/udp -v /srv/openvpn:/data mabitt/openvpn

[Unit]
Description=openvpn
After=docker.service
After=etcd.service
Requires=docker.service

[Service]
TimeoutStartSec=0
ExecStartPre=-/usr/bin/docker pull mabitt/openvpn
ExecStartPre=-/usr/bin/docker stop openvpn
ExecStartPre=-/usr/bin/docker kill openvpn
ExecStartPre=-/usr/bin/docker rm openvpn
ExecStart=/usr/bin/sudo docker run --name openvpn --privileged -p 1194:1194 -p 1194:1194/udp -v /srv/openvpn:/data mabitt/openvpn
ExecStop=/usr/bin/docker stop openvpn
Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target