[Unit]
Description=Hello World Nginx
Requires=docker.service
After=docker.service

[Service]
TimeoutStartSec=0
ExecStartPre=-/usr/bin/docker kill helloworld-nginx
ExecStartPre=-/usr/bin/docker rm -f helloworld-nginx
ExecStartPre=/usr/bin/docker pull mattbailey/helloworld-nginx:latest
ExecStart=/bin/sh -c 'for host in `etcdctl ls /services/helloworld`; do UPSTREAM=$UPSTREAM`etcdctl get $host`; done; docker run -t -e UPSTREAM="$UPSTREAM" --name helloworld-nginx -p 80:80 mattbailey/helloworld-nginx:latest'
ExecStop=-/usr/bin/docker stop helloworld-nginx