无法将 MySQL 服务器连接到 Docker 中的 Spring 应用程序？

Question

我是 Docker 的新手，作为 docker 化 spring mvc 应用程序的一部分，我无法将我的应用程序连接到 MySQL服务器

Dockerfile :this is Spring mvc application so need to copy my war to

 tomcat container
    FROM tomcat:8.0.20-jre8
    COPY /target/CTH.war /usr/local/tomcat/webapps/

docker-compose.yml

  version: '3'
services:
  mysql-standalone:
    image: 'mysql:5.7'
    command: mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
    volumes:
      - ./docker/provision/mysql/init:/docker-entrypoint-initdb.d
    environment:
      - MYSQL_ROOT_PASSWORD= root
      - MYSQL_USER= root
      - MYSQL_PASSWORD= root
      - MYSQL_DATABASE= CTH
      - MYSQL_DATABASE= CTH_CHAT
    ports:
      - "3307:3306"
  cth-docker-container:
    image: cth-docker-container
    ports:
      - "8082:8082"
    environment:
      CTH_DATASOURCE_DATABASE: CTH
      CTH_DATASOURCE_SERVERNAME: mysql-standalone
      CTH_DATASOURCE_USERNAME: root
      CTH_DATASOURCE_PASSWORD: root
      CTH_DATASOURCE_PORT: 3307

      CTH_CHAT_DATASOURCE_DATABASE: CTH_CHAT
      CTH_CHAT_DATASOURCE_SERVERNAME: mysql-standalone
      CTH_CHAT_DATASOURCE_USERNAME: root
      CTH_CHAT_DATASOURCE_PASSWORD: root
      CTH_CHAT_DATASOURCE_PORT: 3307

    build:
      context: "./"
      dockerfile: "Dockerfile"
    depends_on:
      - mysql-standalone

application.properties :this is spring mvc application and application uses MySQL db with two databases

1st db
dbuser.local=${CTH_DATASOURCE_USERNAME:root}
dbpassword.local=${CTH_DATASOURCE_PASSWORD:root}
dbdatabaseName.local=${CTH_DATASOURCE_DATABASE:CTH}
dbserverName.local=${CTH_DATASOURCE_SERVERNAME:localhost}
dbportNumber.local=${CTH_DATASOURCE_PORT:3306} 

2nd db
dbuser.cth.chat.local=${CTH_CHAT_DATASOURCE_USERNAME:root}
dbpassword.cth.chat.local=${CTH_CHAT_DATASOURCE_PASSWORD:root}
dbdatabaseName.cth.chat.local=${CTH_CHAT_DATASOURCE_USERNAME:CTH_CHAT}
dbserverName.cth.chat.local=${CTH_CHAT_DATASOURCE_SERVERNAME:localhost}
dbportNumber.cth.chat.local=${CTH_CHAT_DATASOURCE_PORT:3306}

我阅读了我创建 docker 文件和 docker 撰写文件的文章 https://medium.com/@asce4s/dockerize-spring-mvc-application-a9ffbd11eadb https://github.com/abagayev/docker-bootstrap-collection/tree/master/mysql-few-databases/docker/provision/mysql/init

but i'm getting following erros when i execute docker-compose -f docker-compose.yml up

Caused by: com.mysql.cj.c cth-docker-container_1 | cth-docker-container_1 cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | cth-docker-container_1 | ore.exceptions.CJCommunicationsException: Communications link failure | The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490) at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:54) at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:93) at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:133) at com.mysql.cj.core.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:149) at com.mysql.cj.mysqla.io.MysqlaSocketConnection.connect(MysqlaSocketConnection.java:83) at com.mysql.cj.mysqla.MysqlaSession.connect(MysqlaSession.java:122) at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:1754) at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1624) ... 125 common frames omitted | Caused by: java.net.UnknownHostException: mysql-standalone at java.base/java.net.InetAddress$CachedAddresses.get(InetAddress.java:797) at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1505) at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1364) at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1298) at com.mysql.cj.core.io.StandardSocketFactory.connect(StandardSocketFactory.java:179) at com.mysql.cj.mysqla.io.MysqlaSocketConnection.connect(MysqlaSocketConnection.java:57) ... 128 common frames omitted

如果我设置了错误的环境或者我的方式不正确你的任何建议我一定会帮助我谢谢！

Answer 1

阅读大量文章后，我成功地在 docker 容器中使用 MySQL 数据库启动我的应用程序并在 Mysql workbench.[=13 中访问=]

这是我的 docker-compose 文件

version: '3'

services:
  app:
    container_name: cth-app
    build:
      context: .
      dockerfile: Dockerfile
    ports:
      - '8080:8080'
    environment:
      ##db1
      CTH_DATASOURCE_DATABASE: CTH
      CTH_DATASOURCE_HOST: mysqldb
      CTH_DATASOURCE_USERNAME: cth
      CTH_DATASOURCE_PASSWORD: root
      CTH_DATASOURCE_PORT: 3306

      ##db2
      CTH_CHAT_DATASOURCE_DATABASENAME: CTH_CHAT
      CTH_CHAT_DATASOURCE_HOST: mysqldb
      CTH_CHAT_DATASOURCE_USERNAME: cth
      CTH_CHAT_DATASOURCE_PASSWORD: root
      CTH_CHAT_DATASOURCE_PORT: 3306
    depends_on:
      - mysqldb

  mysqldb:
    image: mysql/mysql-server:5.7
    container_name: mysqldb
    command: mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
    ##here i am able to access dump file which I'll create two databases 
      with user created for me.
    volumes:
      - ./docker/provision/mysql/init:/docker-entrypoint-initdb.d
    ports:
      - '3308:3306'
    environment:
        MYSQL_ROOT_PASSWORD: root
        MYSQL_USER: cth
        MYSQL_PASSWORD: root

you need to create a dump file refer the article [ https://github.com/abagayev/docker-bootstrap-collection/tree/master/mysql-few-databases]

你什么时候docker-compose up -d --build

您的应用程序在运行端口 8080 上启动，MySQL 数据库运行在主机中

谢谢！

无法将 MySQL 服务器连接到 Docker 中的 Spring 应用程序？

Not able to connect with MySQL server to Spring Application in Docker?

spring-mvc

docker

docker-compose

application.properties