cloud-init.yml

#cloud-config
---
coreos:
  fleet:
    public-ip: "$public_ipv4"
  units:
  - name: flanneld.service
    drop-ins:
    - name: 50-network-config.conf
      content: |
        [Service]
        ExecStartPre=/usr/bin/etcdctl set /coreos.com/network/config '{ "Network": "10.1.0.0/16" }'
    command: start

  - name: docker-tcp.socket
    command: start
    enable: true
    content: |
      [Unit]
      Description=Docker Socket for the API

      [Socket]
      ListenStream=2375
      Service=docker.service
      BindIPv6Only=both

      [Install]
      WantedBy=sockets.target

  - name: cadvisor.service
    runtime: true
    command: start
    content: |
      [Unit]
      Description=Analyzes resource usage and performance characteristics of running containers.
      After=docker.service
      Requires=docker.service

      [Service]
      Restart=always
      ExecStartPre=/usr/bin/docker pull google/cadvisor:latest
      ExecStartPre=-/bin/bash -c "docker inspect cadvisor >/dev/null 2>&1 && docker rm -f cadvisor || true"
      ExecStart=/usr/bin/docker run --volume=/var/run:/var/run:rw --volume=/sys:/sys:ro --volume=/var/lib/docker/:/var/lib/docker:ro --volume=/:/rootfs:ro --publish=8080:8080 --name=cadvisor google/cadvisor:latest
      ExecStop=/usr/bin/docker rm -f cadvisor

  - name: grafana.service
    runtime: true
    command: start
    content: |
      [Unit]
      Description=Grafana
      After=docker.service
      Requires=docker.service

      [Service]
      Restart=always
      ExecStartPre=/usr/bin/docker pull grafana/grafana:2.6.0
      ExecStart=/usr/bin/docker run --link=prometheus --name=grafana -p 3000:3000 grafana/grafana
      ExecStop=/usr/bin/docker rm -f grafana

 - name: prometheus.service
    runtime: true
    command: start
    content: |
      [Unit]
      Description=Prometheus
      After=docker.service
      Before=grafana.service
      Requires=docker.service

      [Service]
      Restart=always
      ExecStartPre=/usr/bin/docker pull prom/prometheus
      ExecStart=/usr/bin/docker run -p 9090:9090 --name prometheus prom/prometheus
      ExecStop=/usr/bin/docker rm -f prometheus

  - name: mysql_prom.service
    runtime: true
    command: start
    content: |
      [Unit]
      Description=MySQL Prometheus Exporter
      Before=prometheus.service
      Requires=docker.service

      [Service]
      Restart=always
      ExecStartPre=/usr/bin/docker pull prom/mysqld-exporter
      ExecStart=/usr/bin/docker run -p 9104:9104 --name=mysql_prom -e DATA_SOURCE_NAME="root:local@(192.168.2.1:3306)/db1" prom/mysqld-exporter
      ExecStop=/usr/bin/docker rm -f mysql_prom



ssh_authorized_keys:
  - ssh-rsa mykey

As you are linking the container, you will have a grafana /etc/hosts entries like:

root@06d871812f6c:/# cat /etc/hosts
172.17.0.3 prometheus c95bd47aee6b

Add on your Grafana datasource: http://prometheus:9090/