Docker Stack for Consul

consul.yml

version: "3.4"

services:
  seed:
    image: consul:latest
    environment:
      - "CONSUL_LOCAL_CONFIG={\"disable_update_check\": true}"
      - "CONSUL_BIND_INTERFACE=eth0"
    entrypoint:
      - timeout     #this seed fires up the cluster after which it is no longer needed
      - -sTERM      #this is the same signal as docker would send on a scale down / stop
      - -t300       #terminate after 5 mins
      - consul
      - agent
      - -server
      - -bootstrap-expect=3
      - -data-dir=/tmp/consuldata
      - -bind={{ GetInterfaceIP "eth0" }}
    networks:
      - consul
    deploy:
      restart_policy:
        condition: none
      replicas: 1
      placement:
        constraints:
          - "node.role == manager"

  cluster:
    image: consul:latest
    environment:
      - "CONSUL_LOCAL_CONFIG={\"disable_update_check\": true}"
      - "CONSUL_BIND_INTERFACE=eth0"
      - "CONSUL_HTTP_ADDR=0.0.0.0"
    entrypoint:
      - consul
      - agent
      - -server
      - -data-dir=/tmp/consul
      - -bind={{ GetInterfaceIP "eth0" }}
      - -client=0.0.0.0
      - -retry-join=seed:8301
      - -ui                                              ##assuming you want the UI on
    networks:
      - "consul"
    ports:
      - "8600:8600"
    deploy:
      mode: global                                      ##this will deploy to all nodes that
      labels:
        - "traefik.enable=true"
        - "traefik.port=8500"
        - "traefik.backend=consul"
        - "traefik.docker.network=traefik"
        - "traefik.frontend.rule=Host:consul.mydomain.tld"

networks:
  consul:
    driver: overlay
  traefik:
    external: true