使用web应用程序访问承载在另一个容器中的docker容器中的nodejs

Question

我有三个集装箱在运行：

1. nodejs
2. tomcat
3. mysql

tomcat容器能够连接到mysql。节点能够连接到mysql。

然而，当tomcat容器试图连接到http请求上的节点时，使用node-container-id:3004/3333作为hostname:port或node-container-internal-ip:3004/3333作为hostip:port，，它总是提供404错误。

我的码头-Compose.yml如下：

version: '2.1'

services:

  openmrs-referenceapplication-mysql:
    restart: "always"
    image: mysql:5.7
    ports:
      - 3333:3306
    command: "mysqld --character-set-server=utf8 --collation-server=utf8_general_ci"
    environment:
      MYSQL_DATABASE: ${MYSQL_DB:-openmrs}
      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD:-root-pass}
      MYSQL_USER: ${MYSQL_USER:-openmrs_user}
      MYSQL_PASSWORD: ${MYSQL_PASSWORD:-my-pass}
    healthcheck:
      test: "exit 0"
    volumes:
      - openmrs-referenceapplication-mysql-data:/var/lib/mysql

  openmrs-referenceapplication-node:
    restart: "always"
    image: node:12.20.1
    depends_on :
      - openmrs-referenceapplication-mysql
    expose:
      - "3004"
    ports:
      - "3009:3004"
    links:
      - openmrs-referenceapplication-mysql
      - openmrs-referenceapplication
    environment:
      DB_DATABASE: ${MYSQL_DB:-my-db}
      DB_HOST: openmrs-referenceapplication-mysql
      DB_USERNAME: ${MYSQL_USER:-root}
      DB_PASSWORD: ${MYSQL_PASSWORD:-my-pass}
    volumes:
     - openmrs-referenceapplication-node-data:/home/azureuser/my-dir
     - ./Mydir:/Mydir
    command: node ./Mydir/bin/www


  openmrs-referenceapplication:
    restart: "always"
    image: openmrs/openmrs-reference-application-distro:2.8.0
    depends_on:
      - openmrs-referenceapplication-mysql
    ports:
      - "8001:8080"
    links:
      - openmrs-referenceapplication-mysql
    environment:
      DB_DATABASE: ${MYSQL_DB:-openmrs}
      DB_HOST: openmrs-referenceapplication-mysql
      DB_USERNAME: ${MYSQL_USER:-openmrs_user}
      DB_PASSWORD: ${MYSQL_PASSWORD:-my-pass}
      DB_CREATE_TABLES: 'true'
      DB_AUTO_UPDATE: 'true'
      MODULE_WEB_ADMIN: 'true'
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:8080/openmrs/"]
      timeout: 20s
    volumes:
      - openmrs-referenceapplication-data:/usr/local/tomcat/.OpenMRS/
      - /usr/local/tomcat/.OpenMRS/modules/ # do not store modules in data
      - /usr/local/tomcat/.OpenMRS/owa/ # do not store owa in data
      - ./webservices.rest-2.29.0.omod://usr/local/tomcat/.OpenMRS/modules/webservices.rest-2.29.0.omod
      - /var/lib/tomcat8/webapps/ROOT.war:/usr/local/tomcat/webapps/ROOT
     
volumes:
   openmrs-referenceapplication-mysql-data:
   openmrs-referenceapplication-data:
   openmrs-referenceapplication-node-data:

知道我错过了什么吗？

谢谢

Answer 1

安永！

您的容器可以使用服务名称(只有此名称)到达。因此，如果您想从另一个节点容器到达节点容器，则必须输入以下入口：http://openmrs-referenceapplication-node/<sub_path>。要到达容器外的服务(在本地机器上)，只需访问:localhost:3009 (在您的情况下)。

处理conectivity问题的最佳方法是进入容器并尝试对目标容器进行ping。此外，您应该使用最新版本的compose networks，而不是links。