尝试从两个未能正常工作的Docker运行命令构建一个Docker Compose文件。

huangapple
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英文:

Trying to build a docker-compose file from two docker run commands for two services that is not working

问题

我有两个镜像，mysqldb 和 springboot-service，它们应该一起运行。当我按顺序运行两个 CLI 命令时，它们之间的交互可以正常工作。

  1. docker run --name mysqldb --network springboot-mysql-net --hostname mysqldb -e MYSQL_ROOT_PASSWORD=1234 -e MYSQL_USER=a -e MYSQL_PASSWORD=a -e MYSQL_DATABASE=studentdb -p 3306:3306 -d mysql:latest
  3. docker run --network springboot-mysql-net --name springboot-container -p 8080:8080 -e dbname=mysqldb -d springboot-studentservice

我已经创建了一个 docker-compose 文件，具体代码如下，但是当我运行 docker-compose up 时，Springboot 应用程序无法连接到数据库。它抛出的错误是

  1. 2023-03-07 09:52:49 Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure

docker-compose

  1. services:
  2.   mysqldb:
  3.     image: mysql
  4.     restart: always
  5.     environment:
  6.       MYSQL_ROOT_PASSWORD: 1234
  7.       MYSQL_USER: a
  8.       MYSQL_PASSWORD: a
  9.       MYSQL_DATABASE: studentdb
  10.       hostname: mysqldb
  11.     ports:
  12.       - "3306:3306"
  13.     networks:
  14.       - springboot-mysql-net
  16.   springboot-container:
  17.     image: springboot-studentservice
  18.     environment:
  19.       dbname: mysqldb
  20.     ports:
  21.       - "8080:8080"
  22.     depends_on:
  23.       - mysqldb
  24.     networks:
  25.       - springboot-mysql-net
  27. networks:
  28.   springboot-mysql-net:
  29.     driver: bridge

对于为什么会发生这种情况，我略感困惑！将不胜感激任何帮助。

英文:

I have two images mysqldb and a springboot-service that are meant to be runned together. I have gotten the interaction between both to work when running the two CLI commands sequentially.

  1. docker run --name mysqldb --network springboot-mysql-net --hostname mysqldb -e MYSQL_ROOT_PASSWORD=1234 -e MYSQL_USER=a -e MYSQL_PASSWORD=a -e MYSQL_DATABASE=studentdb -p 3306:3306  -d mysql:latest 
  3. docker run --network springboot-mysql-net --name springboot-container -p 8080:8080 -e dbname=mysqldb -d springboot-studentservice

I have created a docker-compose file with the following code, but when I run docker-compose up, the Springboot application is unable to connection to the db. The error it throws is

  1. 2023-03-07 09:52:49 Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure

docker-compose

  1. services:
  2.   mysqldb:
  3.     image: mysql
  4.     restart: always
  5.     environment:
  6.       MYSQL_ROOT_PASSWORD: 1234
  7.       MYSQL_USER: a
  8.       MYSQL_PASSWORD: a
  9.       MYSQL_DATABASE: studentdb
  10.       hostname: mysqldb
  11.     ports:
  12.       - "3306:3306"
  13.     networks:
  14.       - springboot-mysql-net
  16.   springboot-container:
  17.     image: springboot-studentservice
  18.     environment:
  19.       dbname: mysqldb
  20.     ports:
  21.       - "8080:8080"
  22.     depends_on:
  23.       - mysqldb
  24.     networks:
  25.       - springboot-mysql-net
  27. networks:
  28.   springboot-mysql-net:
  29.     driver: bridge

Am slightly confused as in to why this happens! Help will be appreciated.

答案1

得分: 1

你可以尝试删除 mysqldb 端口。

  1. services:
  2.   mysqldb:
  3.     image: mysql
  4.     restart: always
  5.     environment:
  6.       MYSQL_ROOT_PASSWORD: 1234
  7.       MYSQL_USER: a
  8.       MYSQL_PASSWORD: a
  9.       MYSQL_DATABASE: studentdb
  10.       hostname: mysqldb
  11.     networks:
  12.       - springboot-mysql-net
  14.   springboot-container:
  15.     image: springboot-studentservice
  16.     environment:
  17.       dbname: mysqldb
  18.     ports:
  19.       - "8080:8080"
  20.     depends_on:
  21.       - mysqldb
  22.     networks:
  23.       - springboot-mysql-net
  25. networks:
  26.   springboot-mysql-net:
  27.     driver: bridge

并且你创建了 'studentdb' 数据库吗？如果没有，你需要为 mysqldb 设置一个卷并创建它。

英文:

You could try to remove mysqldb ports.

  1. services:
  2.   mysqldb:
  3.     image: mysql
  4.     restart: always
  5.     environment:
  6.       MYSQL_ROOT_PASSWORD: 1234
  7.       MYSQL_USER: a
  8.       MYSQL_PASSWORD: a
  9.       MYSQL_DATABASE: studentdb
  10.       hostname: mysqldb
  11.     networks:
  12.       - springboot-mysql-net
  14.   springboot-container:
  15.     image: springboot-studentservice
  16.     environment:
  17.       dbname: mysqldb
  18.     ports:
  19.       - "8080:8080"
  20.     depends_on:
  21.       - mysqldb
  22.     networks:
  23.       - springboot-mysql-net
  25. networks:
  26.   springboot-mysql-net:
  27.     driver: bridge

And do you create 'studentdb' database? If not you have to set a volum for mysqldb and create it.

huangapple
  • 本文由 发表于 2023年3月7日 10:02:38
  • 转载请务必保留本文链接：https://go.coder-hub.com/75657430.html
  • docker
  • docker-compose
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