我有一个带有spring数据jpa的springboot项目
我的application.properties看起来像
spring.datasource.url=jdbc:mysql://localhost:3306/db1
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
当我使用maven“ mvn spring-boot：run”运行时，它没有错误
我为该项目创建了一个docker映像并尝试运行它
docker run springbootdemo //springbootdemo is the docker image name
运行图像时，出现以下错误：
2018-07-16 12:12:04.879 INFO 1 --- [ main] c.s.S.SpringBootDemoApplication : Starting SpringBootDemoApplication v0.0.1-SNAPSHOT on fa7cd1e82e95 with PID 1 (/springDocker.war started by root in /)
2018-07-16 12:12:04.882 INFO 1 --- [ main] c.s.S.SpringBootDemoApplication : No active profile set, falling back to default profiles: default
2018-07-16 12:12:04.939 INFO 1 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@38cccef: startup date [Mon Jul 16 12:12:04 GMT 2018]; root of context hierarchy
2018-07-16 12:12:06.145 INFO 1 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$582af4bf] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-07-16 12:12:06.470 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2018-07-16 12:12:06.496 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2018-07-16 12:12:06.496 INFO 1 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/9.0.10
2018-07-16 12:12:06.509 INFO 1 --- [ main] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [/usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/server:/usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64:/usr/lib/jvm/java-1.8-openjdk/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib]
2018-07-16 12:12:06.582 INFO 1 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-07-16 12:12:06.582 INFO 1 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1646 ms
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
2018-07-16 12:12:07.030 INFO 1 --- [ main] o.s.b.w.servlet.ServletRegistrationBean : Servlet dispatcherServlet mapped to [/]
2018-07-16 12:12:07.033 INFO 1 --- [ main] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-07-16 12:12:07.033 INFO 1 --- [ main] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-07-16 12:12:07.033 INFO 1 --- [ main] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-07-16 12:12:07.034 INFO 1 --- [ main] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-07-16 12:12:07.034 INFO 1 --- [ main] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpTraceFilter' to: [/*]
2018-07-16 12:12:07.034 INFO 1 --- [ main] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'webMvcMetricsFilter' to: [/*]
2018-07-16 12:12:07.111 INFO 1 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2018-07-16 12:12:07.115 WARN 1 --- [ main] com.zaxxer.hikari.util.DriverDataSource : Registered driver with driverClassName=com.mysql.jdbc.Driver was not found, trying direct instantiation.
2018-07-16 12:12:08.224 ERROR 1 --- [ main] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Exception during pool initialization.
com.mysql.cj.jdbc.exceptions.CommunicationsException: 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 com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:172) ~[mysql-connector-java-8.0.11.jar!/:8.0.11]
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) ~[mysql-connector-java-8.0.11.jar!/:8.0.11]
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:862) ~[mysql-connector-java-8.0.11.jar!/:8.0.11]
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:444) ~[mysql-connector-java-8.0.11.jar!/:8.0.11]
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:230) ~[mysql-connector-java-8.0.11.jar!/:8.0.11]
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:226) ~[mysql-connector-java-8.0.11.jar!/:8.0.11]
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:136) ~[HikariCP-3.2.0.jar!/:na]
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:369) ~[HikariCP-3.2.0.jar!/:na]
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:198) ~[HikariCP-3.2.0.jar!/:na]
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:467) [HikariCP-3.2.0.jar!/:na]
at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:541) [HikariCP-3.2.0.jar!/:na]
at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) [HikariCP-3.2.0.jar!/:na]
at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) [HikariCP-3.2.0.jar!/:na]
at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:151) [spring-jdbc-5.1.0.BUILD-SNAPSHOT.jar!/:5.1.0.BUILD-SNAPSHOT]
任何帮助将不胜感激。在此先感谢!!
答案 0 :(得分：0)
当您位于Docker容器中时，本地主机将解析为容器IP地址。但是您的数据库不在应用程序Docker容器中。
因此，您应该将spring.datasource.url配置更改为一个URL，该URL是可以从应用程序Docker容器访问的真实数据库IP地址。将spring.datasource.url中的localhost更改为Docker主机IP地址或您的LAN IP地址。
此外，我认为最好在Docker文件中指定一个指向数据库IP地址的环境变量，并在配置属性中使用它。