我正在尝试将 Spring 应用程序与 AWS RDS 连接起来。
Spring Boot - 2.4.7, Spring Cloud AWS -2.3.1
要连接，我使用来自 AWS STS 的 Web 身份令牌。我spring-cloud-starter-aws-jdbc在类路径中，根据这个 PR，也添加aws-java-sdk-sts了。
我收到以下异常：
2021-07-23 20:38:39.017 ERROR [test-db-service,,,[] 1 --- [ main[] o.a.tomcat.jdbc.pool.ConnectionPool : Unable to create initial connections of pool.
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:174)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:319)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:212)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:744)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:676)
at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:483)
at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:154)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:118)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:107)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:131)
at liquibase.integration.spring.SpringLiquibase.afterPropertiesSet(SpringLiquibase.java:313)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1845)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1782)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:602)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1154)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:908)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:771)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:763)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:438)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:339)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1329)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1318)
at com.backbase.examples.aws.Application.main(Application.java:10)
Caused by: com.mysql.cj.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.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167)
at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:340)
at com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect(NativeAuthenticationProvider.java:167)
at com.mysql.cj.protocol.a.NativeProtocol.connect(NativeProtocol.java:1348)
at com.mysql.cj.NativeSession.connect(NativeSession.java:157)
at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:956)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826)
... 34 common frames omitted
Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
at java.base/sun.security.ssl.HandshakeContext.<init>(HandshakeContext.java:170)
at java.base/sun.security.ssl.ClientHandshakeContext.<init>(ClientHandshakeContext.java:98)
at java.base/sun.security.ssl.TransportContext.kickstart(TransportContext.java:221)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:433)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:411)
at com.mysql.cj.protocol.ExportControlled.performTlsHandshake(ExportControlled.java:317)
at com.mysql.cj.protocol.StandardSocketFactory.performTlsHandshake(StandardSocketFactory.java:188)
at com.mysql.cj.protocol.a.NativeSocketConnection.performTlsHandshake(NativeSocketConnection.java:97)
at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:331)
... 39 common frames omitted
由于使用 spring-cloud-aws-jdbc，连接池是 tomcat 而不是 hikari，因此tomcat-pool我使用的 to paas trustCertificate 和其他 ssl 属性的等效属性是：
spring.datasource.tomcat.db-properties.useSSL: "true"
spring.datasource.tomcat.db-properties.sslMode: "VERIFY_CA"
spring.datasource.tomcat.db-properties.trustCertificateKeyStoreUrl: "file:/truststore/aws-rds-truststore.jks"
spring.datasource.tomcat.db-properties.trustCertificateKeyStorePassword: "password"
我尝试设置-Djavax.net.ssl.trustStore=file:///truststore/rds-truststore.jks但没有运气。
更新 1：
从Aws docs，它提到
Using SSL/TLS with Aurora MySQL DB clusters
We recommend the MariaDB Connector/J client as a client that supports SAN with SSL.
我将驱动程序更改为mariadb-java-client，但 spring-cloud-aws 在内部将驱动程序类设置为com.mysql.jdbc.Driver，然后我看到以下错误：
2021-08-22 14:26:50.918 ERROR [test-db-service,,,] 1 --- [ main] o.a.tomcat.jdbc.pool.ConnectionPool : Unable to create initial connections of pool. │
│ java.sql.SQLException: Unable to load class: com.mysql.jdbc.Driver from ClassLoader:jdk.internal.loader.ClassLoaders$AppClassLoader@67424e82;ClassLoader:jdk.internal.loader.ClassLoaders$AppClassLoader@67424e82 │
│ at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:292) │
│ at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:212) │
│ at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:744) │
│ at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:676) │
│ at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:483) │
│ at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:154) │
│ at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:118) │
│ at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:107) │
│ at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:131) │
│ at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122)
有没有办法强制 spring-cloud-aws 使用 Mariadb 驱动程序类？