Docker Elasticsearch与PHP之间没有链接

这是我的docker compose：

version: "2"
services:
  mongodb:
    container_name: "elastic_backend_mongodb"
    restart: "always"
    image: "mongo:latest"
    volumes:
      - "./data/db/:/data/db"
    ports:
      - "27017:27017"
    command: --storageEngine wiredTiger
    networks:
      - "elastic_backend"
  php:
      build: ./develop
      container_name: "elastic_backend_php"
      restart: "always"
      environment:
        PHP_IDE_CONFIG: serverName=elastic_backend
      depends_on:
        - "mongodb"
        - "db"
        - "elasticsearch"
      expose:
        - "9000"
      volumes:
        - "../.:/var/www/html"
      networks:
        - "elastic_backend"
  nginx:
      image: "nginx:latest"
      container_name: "elastic_backend_nginx"
      restart: "always"
      volumes:
        - "./nginx/conf/nginx.conf:/etc/nginx/conf/nginx.conf:ro"
        - "./nginx/conf.d:/etc/nginx/conf.d:ro"
      ports:
        - "80:80"
      volumes_from:
        - "php"
      networks:
        - "elastic_backend"
  db:
    container_name: "elastic_backend_mysql"
    restart: "always"
    image: "mysql:5.7"
    command: --max_allowed_packet=32505856
    environment:
      MYSQL_ROOT_PASSWORD: "asd"
      MYSQL_DATABASE: "elastic_backend"
    ports:
      - "3306:3306"
    volumes:
      - "./mysql:/var/lib/mysql"
    networks:
      - "elastic_backend"
  elasticsearch:
    container_name: "elastic_backend_es"
    image: elasticsearch:6.5.4
    environment:
      - discovery.type=single-node
    ports:
      - "9200:9200"
      - "9300:9300"
networks:
  elastic_backend:

所以，除了php容器不能ping elasticsearch容器之外，所有这些都可以正常工作。db和mongodb容器可以很好地从php容器ping。我也尝试使用“链接”和docker的模拟指令，但没有任何运气。 那么我做错了什么

我可以从主机（macos）获取elasticsearch的rest接口：

---

PHP容器无法在此处访问elasticsearch容器，因为，

elasticsearch

服务未连接到

elastic\u后端

网络。在

elasticsearch

服务下添加此项

    networks:
      - "elastic_backend"

---

PHP容器无法在此处访问elasticsearch容器，因为，

elasticsearch

服务未连接到

elastic\u后端

网络。在

elasticsearch

服务下添加此项

    networks:
      - "elastic_backend"

---

啊，真的，非常感谢！以全新的视角看待这个问题是无价的！啊，真的，非常感谢！以全新的视角看待这个问题是无价的！