docker容器中的Java服务未连接到主机mysql答案

【问题标题】：Java service in docker container not connecting to host mysqldocker容器中的Java服务未连接到主机mysql
【发布时间】：2023-03-23 08:30:02
【问题描述】：

我在 docker 容器中运行 Java 微服务，但无法连接到本地托管的 mysql。

docker 在 ip 地址为 172.0.. 的网络中运行。如果我直接以 java -jar 执行 Java 服务，它能够连接到运行在 10.0 中的 mysql。.

码头工人撰写文件

 version: '2.0'
services:
  config-server:
        image: test/config-server
        container_name: config-server
        environment:
          - GIT_USERNAME=${GIT_USERNAME}
          - GIT_PASSWORD=${GIT_PASSWORD}
        ports:
          - 8889:8889
        entrypoint: ["java", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-Dspring.profiles.active=docker", "-Drun.arguments=GIT_USERNAME=${GIT_USERNAME}, GIT_PASSWORD=${GIT_PASSWORD} -Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
  discovery-server:
      image: test/discovery-server
      container_name: discovery-server
      links:
        - config-server
      depends_on:
        - config-server
      entrypoint: ["./wait-for-it.sh","config-server:8889","--timeout=60","--","java", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-Dspring.profiles.active=docker", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
      ports:
        - 8761:8761
  web-authentication:
      image: test/web-authentication
      container_name: web-authentication
      links:
        - config-server
        - discovery-server
      depends_on:
        - discovery-server
      entrypoint: ["./wait-for-it.sh","discovery-server:8761","--timeout=60","--","java", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-Dspring.profiles.active=docker", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
      ports:
        - 8444:8444
  gateway:
      image: test/gateway
      container_name: gateway
      links:
        - config-server
        - discovery-server
        - web-authentication
      depends_on:
        - discovery-server
      entrypoint: ["./wait-for-it.sh","discovery-server:8761","--timeout=60","--","java", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-Dspring.profiles.active=docker", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
      ports:
        - 81:8765

【问题讨论】：

发布您的撰写文件和您的 Dockerfile...
@Dave - 我添加了 docker-compose 文件，我正在使用 maven 插件构建 docker 映像，所以没有 DockerFile。

标签： java mysql docker-compose

【解决方案1】：

在 docker-compose.yml 中配置网络配置后问题已解决，问题是 mysql 和 Docker 容器在不同的子网中运行。

【讨论】：