This is a cloud-config file template for Rancher OS. Fill in the blanks and it'll automatically setup your Rancher Server behind an Nginx proxy and register Let's Encrypt SSL certs and then renew them automatically

cloud-config.yml

#cloud-config
ssh_authorized_keys:
- ssh-rsa <my-public-key>
rancher:
  services:
    nginx-proxy:
      image: jwilder/nginx-proxy:0.4.0
      restart: unless-stopped
      ports:
      - "80:80"
      - "443:443"
      volumes:
      - '/home/docker/nginx-proxy/ssl:/etc/nginx/certs:ro'
      - '/etc/nginx/vhost.d'
      - '/usr/share/nginx/html'
      - '/var/run/docker.sock:/tmp/docker.sock:ro'
    letsencrypt-nginx-proxy-companion:
      image: jrcs/letsencrypt-nginx-proxy-companion:v1.3
      restart: unless-stopped
      volumes_from:
      - nginx-proxy
      volumes:
      - '/home/docker/nginx-proxy/ssl:/etc/nginx/certs:rw'
      - '/var/run/docker.sock:/var/run/docker.sock:ro'
    rancher-server:
      image: rancher/server:v1.2.0-pre3
      restart: unless-stopped
      environment:
      - VIRTUAL_PORT=8080
      - VIRTUAL_HOST=<my.domain.com>
      - LETSENCRYPT_TEST=false
      - LETSENCRYPT_HOST=<my.domain.com>
      - LETSENCRYPT_EMAIL=<myemail@com>
      - CATTLE_DB_CATTLE_MYSQL_HOST=<mysql-ip-or-hostname>
      - CATTLE_DB_CATTLE_MYSQL_PORT=<mysql-port>
      - CATTLE_DB_CATTLE_MYSQL_NAME=<mysql-schema-name>
      - CATTLE_DB_CATTLE_USERNAME=<mysql-user>
      - CATTLE_DB_CATTLE_PASSWORD=<my-sql-pass>