java - 在 mysql 上使用 docker-compose 时遇到问题

Question

我在尝试使用 Docker-compose 连接 MySQL 数据库时遇到问题。我的应用程序启动，直到尝试通过 docker 连接到数据库，而我可以从 IDE 连接到同一个数据库。当我从 IDE 运行它并使用运行 Docker 的 MySQL 时，我可以使用 spring.datasource.url=jdbc:mysql://localhost:3306/exchanger 连接到它、添加、删除等。但是从 docker-compose 启动我的应用程序似乎会导致连接错误。我尝试了不同的 datasource.url，但没有任何帮助。

这是我的文件:

Dockerfile:

FROM openjdk:8u201-jdk-alpine3.9
ADD target/exchanger-0.0.1-SNAPSHOT.jar .
EXPOSE 8080
CMD java -jar exchanger-0.0.1-SNAPSHOT.jar

Docker-compose.yml

version: '3'                          
services:                             

  db:
    container_name: db       
    image: mysql                     
    environment:                       
      MYSQL_PASSWORD: password
      MYSQL_ROOT_PASSWORD: password
      MYSQL_DATABASE: exchanger
      MYSQL_USER: user
    ports:
      - "3306:3306"
      - "33060:33060"
    restart : always
    volumes:
      - ./mysql-data:/var/lib/mysql


  exchanger:                              
    build: ./                          
    ports:
      - "8080:8080"
    depends_on:                        
      - db

应用程序属性:

server.port=8080
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL57Dialect
spring.datasource.username=root
spring.datasource.password=password
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://db:3306/exchanger
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=create-drop
logging.level.org.hibernate.SQL=info

控制台日志

Starting db ... done
Starting exchanger_exchanger_1 ... done
Attaching to db, exchanger_exchanger_1
db           | 2020-02-13 23:28:02+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 8.0.19-1debian9 started.
db           | 2020-02-13 23:28:02+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql'
db           | 2020-02-13 23:28:02+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 8.0.19-1debian9 started.
db           | 2020-02-13T23:28:02.638670Z 0 [Warning] [MY-010139] [Server] Changed limits: max_open_files: 1024 (requested 8161)
db           | 2020-02-13T23:28:02.638684Z 0 [Warning] [MY-010142] [Server] Changed limits: table_open_cache: 431 (requested 4000)
db           | 2020-02-13T23:28:02.968321Z 0 [Warning] [MY-011070] [Server] 'Disabling symbolic links using --skip-symbolic-links (or equivalent) is the default. Consider not using this option as it' is deprecated and will be removed in a future release.
db           | 2020-02-13T23:28:02.968508Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.19) starting as process 1
db           | 2020-02-13T23:28:05.415554Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
db           | 2020-02-13T23:28:05.461398Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/var/run/mysqld' in the path is accessible to all OS users. Consider choosing a different directory.
db           | 2020-02-13T23:28:05.504622Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.19'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  MySQL Community Server - GPL.
db           | 2020-02-13T23:28:05.777882Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Socket: '/var/run/mysqld/mysqlx.sock' bind-address: '::' port: 33060
exchanger_1  | 
exchanger_1  |   .   ____          _            __ _ _
exchanger_1  |  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
exchanger_1  | ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
exchanger_1  |  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
exchanger_1  |   '  |____| .__|_| |_|_| |_\__, | / / / /
exchanger_1  |  =========|_|==============|___/=/_/_/_/
exchanger_1  |  :: Spring Boot ::        (v2.2.4.RELEASE)
exchanger_1  | 
exchanger_1  | 2020-02-13 23:28:06.865  INFO 1 --- [           main] p.e.exchanger.ExchangerApplication       : Starting ExchangerApplication v0.0.1-SNAPSHOT on f2c5f2d1f4c1 with PID 1 (/exchanger-0.0.1-SNAPSHOT.jar started by root in /)
exchanger_1  | 2020-02-13 23:28:06.873  INFO 1 --- [           main] p.e.exchanger.ExchangerApplication       : No active profile set, falling back to default profiles: default
exchanger_1  | 2020-02-13 23:28:09.180  INFO 1 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
exchanger_1  | 2020-02-13 23:28:09.341  INFO 1 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 138ms. Found 3 JPA repository interfaces.
exchanger_1  | 2020-02-13 23:28:10.311  INFO 1 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
exchanger_1  | 2020-02-13 23:28:10.944  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
exchanger_1  | 2020-02-13 23:28:10.976  INFO 1 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
exchanger_1  | 2020-02-13 23:28:10.976  INFO 1 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.30]
exchanger_1  | 2020-02-13 23:28:11.128  INFO 1 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
exchanger_1  | 2020-02-13 23:28:11.128  INFO 1 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 4140 ms
exchanger_1  | 2020-02-13 23:28:11.752  INFO 1 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
exchanger_1  | 2020-02-13 23:28:11.911  INFO 1 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate Core {5.4.10.Final}
exchanger_1  | 2020-02-13 23:28:12.181  INFO 1 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
exchanger_1  | 2020-02-13 23:28:12.410  INFO 1 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
exchanger_1  | 2020-02-13 23:28:13.660 ERROR 1 --- [           main] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Exception during pool initialization.
exchanger_1  | 
exchanger_1  | com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
exchanger_1  | 
exchanger_1  | The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
exchanger_1  |  at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) ~[mysql-connector-java-8.0.19.jar!/:8.0.19]
exchanger_1  |  at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) ~[mysql-connector-java-8.0.19.jar!/:8.0.19]
exchanger_1  |  at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836) ~[mysql-connector-java-8.0.19.jar!/:8.0.19]
exchanger_1  |  at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456) ~[mysql-connector-java-8.0.19.jar!/:8.0.19]
exchanger_1  |  at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246) ~[mysql-connector-java-8.0.19.jar!/:8.0.19]
exchanger_1  |  at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:197) ~[mysql-connector-java-8.0.19.jar!/:8.0.19]
exchanger_1  |  at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-3.4.2.jar!/:na]
exchanger_1  |  at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:354) ~[HikariCP-3.4.2.jar!/:na]
exchanger_1  |  at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:202) ~[HikariCP-3.4.2.jar!/:na]
exchanger_1  |  at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:473) [HikariCP-3.4.2.jar!/:na]
exchanger_1  |  at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:554) [HikariCP-3.4.2.jar!/:na]
exchanger_1  |  at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) [HikariCP-3.4.2.jar!/:na]
exchanger_1  |  at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) [HikariCP-3.4.2.jar!/:na]
exchanger_1  |  at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) [hibernate-core-5.4.10.Final.jar!/:5.4.10.Final]
exchanger_1  |  at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcEnvironmentInitiator.java:180) [hibernate-core-5.4.10.Final.jar!/:5.4.10.Final]
...

Answer 1

我已经解决了这个问题

第一次设置数据库时出现问题。我认为创建 MySQL 数据库时出现问题，整个卷 ./myslq-data 错误。

我刚刚删除了目录 mysql-data 并再次创建了 run docker-compose。它再次创造了音量并且效果很好。