Setting up a consul cluster and registrator on Rancher.

docker-compose.yml

version: '2'

services:
  consul-lb:
    image: rancher/lb-service-haproxy:v0.7.8
    ports:
      - 8400
      - 8500
      - 8600
    expose:
      - 8400
      - 8500
      - 8600
    environment:
      - SERVICE_8500_NAME=consul-admin
    labels:
      io.rancher.container.network: true

  consul-1:
    command: "-server -bootstrap-expect 3 -ui-dir /ui"
    image: progrium/consul:latest
    ports:
      - 8400
      - 8500
      - 8600
    environment:
      - SERVICE_8300_IGNORE=yes
      - SERVICE_8301_IGNORE=yes
      - SERVICE_8302_IGNORE=yes
      - SERVICE_8400_IGNORE=yes
      - SERVICE_8600_IGNORE=yes
    labels:
      io.rancher.container.network: true
      io.rancher.container.hostname_override: container_name
      consul: 'true'

  consul-2:
    command: "-server -join consul-1"
    image: progrium/consul:latest
    ports:
      - 8400
      - 8500
      - 8600
    depends_on:
      - consul-1
    environment:
      - SERVICE_8300_IGNORE=yes
      - SERVICE_8301_IGNORE=yes
      - SERVICE_8302_IGNORE=yes
      - SERVICE_8400_IGNORE=yes
      - SERVICE_8600_IGNORE=yes
    labels:
      io.rancher.container.network: true
      io.rancher.container.hostname_override: container_name
      consul: true

  consul-3:
    command: "-server -join consul-1"
    image: progrium/consul:latest
    ports:
      - 8400
      - 8500
      - 8600
    depends_on:
      - consul-1
    environment:
      - SERVICE_8300_IGNORE=yes
      - SERVICE_8301_IGNORE=yes
      - SERVICE_8302_IGNORE=yes
      - SERVICE_8400_IGNORE=yes
      - SERVICE_8600_IGNORE=yes
    labels:
      io.rancher.container.network: true
      io.rancher.container.hostname_override: container_name
      consul: true
      
  registrator:
    image: gliderlabs/registrator:master
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock
    depends_on:
      - consul-lb
    command:
      - -internal
      - -useIpFromLabel
      - io.rancher.container.ip
      - consul://consul-lb:8500
    labels:
      io.rancher.container.network: true
      io.rancher.container.hostname_override: container_name
      io.rancher.scheduler.global: 'true'

rancher-compose.yml

version: '2'
services:
  consul-1:
    scale: 1
    start_on_create: true
  consul-2:
    scale: 1
    start_on_create: true
  consul-3:
    scale: 1
    start_on_create: true
  registrator:
    start_on_create: true
  consul-lb:
    scale: 1
    start_on_create: true
    lb_config:
      certs: []
      port_rules:
      - priority: 1
        protocol: tcp
        selector: consul=true
        source_port: 8400
        target_port: 8400
      - priority: 1
        protocol: tcp
        selector: consul=true
        source_port: 8500
        target_port: 8500
      - priority: 1
        protocol: tcp
        selector: consul=true
        source_port: 8600
        target_port: 8600
    health_check:
      response_timeout: 2000
      healthy_threshold: 2
      port: 42
      unhealthy_threshold: 3
      initializing_timeout: 60000
      interval: 2000
      reinitializing_timeout: 60000