Question

我尝试在Docker上使用mysql连接运行Springboot应用程序。没有码头工人，它运作良好。但是，当我尝试在容器上进行部署时，我有com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure。我使用这个docker-compose：

version: '3'
services:
  nginx:
   container_name: nginx
   image: nginx:latest
   restart: always
   ports:
   - 80:80
   - 443:443
   volumes:
   - ./nginx/conf.d:/etc/nginx/conf.d
   depends_on:
   - spring-boot-app


  mysql:
   container_name: mysql
   image: mysql:latest
   environment:
    MYSQL_ROOT_PASSWORD: "rootpass"
    MYSQL_DATABASE: "db"
    MYSQL_USER: "user"
    MYSQL_PASSWORD: "pass"
   ports:
   - "1306:3306"
   volumes:
   - ./data/:/var/lib/mysql
   networks: 
   - mysql-db
   restart: always

  spring-boot-app:
    container_name: spring-boot-app
    image: spring-boot-app
    build:
      context: ./spring-boot-app
      dockerfile: Dockerfile
    ports:
      - "8080:8080"
    depends_on:
      - mysql
    networks: 
      - mysql-db
    restart: always

networks: 
  mysql-db:
      driver: bridge

这是springboot应用程序的Dockerfile：

FROM openjdk:11
COPY target/spring-boot-app.jar /spring-boot-app/spring-boot-app.jar
ENTRYPOINT [ "java", "-jar", "-Dspring.profiles.active=prod","/spring-boot-app/spring-boot-app.jar" ]

最后，这是application.properties：

spring.datasource.url = jdbc:mysql://mysql:1306/db
spring.datasource.username = user
spring.datasource.password = pass

# Show or not log for each sql query
spring.jpa.show-sql = true

# Hibernate ddl auto (create, create-drop, update)
spring.jpa.hibernate.ddl-auto = update

# Use spring.jpa.properties.* for Hibernate native properties (the prefix is
# stripped before adding them to the entity manager)

# The SQL dialect makes Hibernate generate better SQL for the chosen database
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

server.port=8080

我不认为这是端口问题，因为我尝试将mysql设置为默认端口（3306），但仍然无法正常工作。

如果有帮助，这里是docker ps：

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                  PORTS                                      NAMES
08ea16361c61        nginx:latest        "nginx -g 'daemon of…"   1 second ago        Up Less than a second   0.0.0.0:80->80/tcp, 0.0.0.0:443->443/tcp   nginx
52ef8d5c2127        spring-boot-app     "java -jar -Dspring.…"   3 seconds ago       Up 1 second             0.0.0.0:8080->8080/tcp                     spring-boot-app
7bbcdc1fae3c        mysql:latest        "docker-entrypoint.s…"   4 seconds ago       Up 3 seconds            33060/tcp, 0.0.0.0:1306->3306/tcp          mysql

编辑：完整堆栈跟踪：

ubuntu@ubuntu:~/Documents/SpringBoot$ docker-compose up
Creating network "springboot_mysql-db" with driver "bridge"
Creating mysql ... done
Creating spring-boot-app ... done
Attaching to mysql, spring-boot-app
mysql              | 2019-05-27T21:50:19.645920Z 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.
mysql              | 2019-05-27T21:50:19.645986Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.16) starting as process 1
mysql              | 2019-05-27T21:50:20.451523Z 0 [System] [MY-010229] [Server] Starting crash recovery...
mysql              | 2019-05-27T21:50:20.466040Z 0 [System] [MY-010232] [Server] Crash recovery finished.
mysql              | 2019-05-27T21:50:20.544487Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
mysql              | 2019-05-27T21:50:20.551894Z 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.
mysql              | 2019-05-27T21:50:20.584210Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.16'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  MySQL Community Server - GPL.
mysql              | 2019-05-27T21:50:20.682338Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Socket: '/var/run/mysqld/mysqlx.sock' bind-address: '::' port: 33060
spring-boot-app    | 
spring-boot-app    |   .   ____          _            __ _ _
spring-boot-app    |  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
spring-boot-app    | ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
spring-boot-app    |  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
spring-boot-app    |   '  |____| .__|_| |_|_| |_\__, | / / / /
spring-boot-app    |  =========|_|==============|___/=/_/_/_/
spring-boot-app    |  :: Spring Boot ::        (v2.1.5.RELEASE)
spring-boot-app    | 
spring-boot-app    | 2019-05-27 21:50:22.884  INFO 1 --- [           main] com.jv.demo.DemoApplication              : Starting DemoApplication v0.0.1-SNAPSHOT on c69469fd7461 with PID 1 (/spring-boot-app/spring-boot-app.jar started by root in /)
spring-boot-app    | 2019-05-27 21:50:22.903  INFO 1 --- [           main] com.jv.demo.DemoApplication              : The following profiles are active: prod
spring-boot-app    | 2019-05-27 21:50:25.152  INFO 1 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
spring-boot-app    | 2019-05-27 21:50:25.378  INFO 1 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 205ms. Found 1 repository interfaces.
spring-boot-app    | 2019-05-27 21:50:26.313  INFO 1 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$e43b97d] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
spring-boot-app    | 2019-05-27 21:50:27.043  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
spring-boot-app    | 2019-05-27 21:50:27.195  INFO 1 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
spring-boot-app    | 2019-05-27 21:50:27.196  INFO 1 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.19]
spring-boot-app    | 2019-05-27 21:50:27.472  INFO 1 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
spring-boot-app    | 2019-05-27 21:50:27.472  INFO 1 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 4316 ms
spring-boot-app    | 2019-05-27 21:50:27.928  INFO 1 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
spring-boot-app    | 2019-05-27 21:50:29.226 ERROR 1 --- [           main] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Exception during pool initialization.
spring-boot-app    | 
spring-boot-app    | com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
spring-boot-app    | 
spring-boot-app    | The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
spring-boot-app    |    at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:835) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:455) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:240) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:136) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app    |    at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:369) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app    |    at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:198) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app    |    at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:467) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app    |    at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:541) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app    |    at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app    |    at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app    |    at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:157) ~[spring-jdbc-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:115) ~[spring-jdbc-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:78) ~[spring-jdbc-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:319) ~[spring-jdbc-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:356) ~[spring-jdbc-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.boot.autoconfigure.orm.jpa.DatabaseLookup.getDatabase(DatabaseLookup.java:73) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app    |    at org.springframework.boot.autoconfigure.orm.jpa.JpaProperties.determineDatabase(JpaProperties.java:142) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app    |    at org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.jpaVendorAdapter(JpaBaseConfiguration.java:113) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app    |    at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$2d1a7bec.CGLIB$jpaVendorAdapter$5(<generated>) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app    |    at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$2d1a7bec$$FastClassBySpringCGLIB$$cb57d9da.invoke(<generated>) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app    |    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) ~[spring-context-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$2d1a7bec.jpaVendorAdapter(<generated>) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app    |    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
spring-boot-app    |    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
spring-boot-app    |    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
spring-boot-app    |    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
spring-boot-app    |    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1248) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1168) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:509) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1248) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1168) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:509) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1105) ~[spring-context-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app    |    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) ~[spring-boot-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app    |    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) ~[spring-boot-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app    |    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app    |    at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) ~[spring-boot-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app    |    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) ~[spring-boot-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app    |    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) ~[spring-boot-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app    |    at com.jv.demo.DemoApplication.main(DemoApplication.java:10) ~[classes!/:0.0.1-SNAPSHOT]
spring-boot-app    |    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
spring-boot-app    |    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
spring-boot-app    |    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
spring-boot-app    |    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
spring-boot-app    |    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) ~[spring-boot-app.jar:0.0.1-SNAPSHOT]
spring-boot-app    |    at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) ~[spring-boot-app.jar:0.0.1-SNAPSHOT]
spring-boot-app    |    at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) ~[spring-boot-app.jar:0.0.1-SNAPSHOT]
spring-boot-app    |    at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51) ~[spring-boot-app.jar:0.0.1-SNAPSHOT]
spring-boot-app    | Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure
spring-boot-app    | 
spring-boot-app    | The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
spring-boot-app    |    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:na]
spring-boot-app    |    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:na]
spring-boot-app    |    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na]
spring-boot-app    |    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490) ~[na:na]
spring-boot-app    |    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:91) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.mysql.cj.NativeSession.connect(NativeSession.java:152) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:955) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:825) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    ... 84 common frames omitted
spring-boot-app    | Caused by: java.net.ConnectException: Connection refused (Connection refused)
spring-boot-app    |    at java.base/java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:na]
spring-boot-app    |    at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399) ~[na:na]
spring-boot-app    |    at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242) ~[na:na]
spring-boot-app    |    at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224) ~[na:na]
spring-boot-app    |    at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403) ~[na:na]
spring-boot-app    |    at java.base/java.net.Socket.connect(Socket.java:591) ~[na:na]
spring-boot-app    |    at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:65) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app    |    ... 87 common frames omitted
spring-boot-app    | 
spring-boot-app    | 2019-05-27 21:50:29.234  WARN 1 --- [           main] o.s.b.a.orm.jpa.DatabaseLookup           : Unable to determine jdbc url from datasource
spring-boot-app    | 
spring-boot-app    | org.springframework.jdbc.support.MetaDataAccessException: Could not get Connection for extracting meta-data; nested exception is org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure

Answer 1

由于您的Spring Boot应用程序也在docker映像中启动，因此您不能使用docker公开的端口，而需要使用映像的原始端口。

在application.properties中，您需要使用：

spring.datasource.url = jdbc:mysql://mysql:3306/db

Answer 2

networks和links之间存在差异。使用下面的链接

version: '2'
services:
    web:
        build: . 
        links: 
            - "db:database"
    db:
        image: postgres

此开关将在另一个Docker容器中添加ID和IP地址。这样，他们可以彼此连接。有关更多信息，请检查link之后。

Docker，Springboot和Mysql：com.mysql.cj.exceptions.CJCommunicationsException：通信链接失败

2 个答案: