[Unit]
Description=myservice
Requires=etcd.service

After=docker.service
After=etcd.service

[Service]
EnvironmentFile=/etc/environment
User=core

Restart=always

TimeoutStartSec=0
ExecStartPre=-/usr/bin/docker kill %p-%i
ExecStartPre=-/usr/bin/docker rm %p-%i
ExecStartPre=/usr/bin/docker pull myservice
ExecStart=/usr/bin/docker run myservice
ExecStop=/usr/bin/docker kill %p-%i