Docker compose无法发出跨容器请求

我在运行服务时遇到网络问题 docker-compose 版本:“3.0”

services:
  postgres:
    image: postgres:9.4
    container_name: kong-database
    ports:
      - "5432:5432"
    environment:
      - POSTGRES_USER=kong
      - POSTGRES_DB=kong

  web:
    image: kong:latest
    container_name: kong
    environment:
      - DATABASE=postgres
      - KONG_PG_HOST=postgres
    restart: always
    ports:
      - "8000:8000"
      - "443:8443"
      - "8001:8001"
      - "7946:7946"
      - "7946:7946/udp"
    links:
      - postgres

  ui:
    image: pgbi/kong-dashboard
    container_name: kong-dashboard
    ports:
      - "8080:8080"
  employeedb:
    build: test-api/
    restart: always
    ports:
       - "5002:5002"

我使用命令将API添加到kong curl -i -X POST --url http://localhost:8001/apis/ --data name=employeedb --data upstream_url=http://localhost:5002 --data hosts=employeedb --data uris=/employees .我尝试了许多输入组合,包括不同的名称,传入Docker网络IP和测试api的名称作为上游URL的主机名。在将API添加到Kong之后,我得到了

HTTP/1.1 502 Bad Gateway
Date: Tue, 11 Jul 2017 14:17:17 GMT
Content-Type: text/plain; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
Server: kong/0.10.3

此外,我还进入了docker容器运行 docker exec it <container-id> /bin/bash 并尝试向预期的烧瓶端点发出curl请求。在运行API的容器上,我成功地调用了这两个函数 localhost:5002/employees 以及 employeedb:5002/employees

curl -iv -X GET --url 'http://employeedb:5002/employees'
* About to connect() to employeedb port 5002 (#0)
*   Trying X.X.X.X...
* Connection refused
* Failed connect to employeedb:5002; Connection refused
* Closing connection 0