version: '3'
services:
  etcd:
    image: quay.io/coreos/etcd:v3.4.0
    environment:
      ETCD_LISTEN_CLIENT_URLS: http://0.0.0.0:2379
      ETCD_ADVERTISE_CLIENT_URLS: http://etcd:2379
      DATA_DIR: /etcd-data
    tmpfs:
      - /etcd-data

  app1:
    build: ./
    depends_on:
      - etcd
    environment:
      SERVER_PORT: 8000
      ETCD_ENDPOINT: etcd:2379
    ports:
      - 8001:8000
  app2:
    build: ./
    depends_on:
      - etcd
    environment:
      SERVER_PORT: 8000
      ETCD_ENDPOINT: etcd:2379
    ports:
      - 8002:8000
  app3:
    build: ./
    depends_on:
      - etcd
    environment:
      SERVER_PORT: 8000
      ETCD_ENDPOINT: etcd:2379
    ports:
      - 8003:8000