Question

我有一个AWS上的Postgres数据库，可以在外面使用。当我在本地启动我的应用程序时，连接工作正常。

当我在AWS Lambda上启动它时，出现此错误：

org.postgresql.util.PSQLException: The connection attempt failed.
    at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:292)
    at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49)
    at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:195)
    at org.postgresql.Driver.makeConnection(Driver.java:454)
    at org.postgresql.Driver.connect(Driver.java:256)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:270)
    at ninja.majewski.AmazonDbService.getRemoteConnection(AmazonDbService.java:84)
    at ninja.majewski.AmazonDbService.removeOldDeals(AmazonDbService.java:63)
    at ninja.majewski.ChinaStuffLambdaHandler.handleRequest(ChinaStuffLambdaHandler.java:19)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at lambdainternal.EventHandlerLoader$PojoMethodRequestHandler.handleRequest(EventHandlerLoader.java:259)
    at lambdainternal.EventHandlerLoader$PojoHandlerAsStreamHandler.handleRequest(EventHandlerLoader.java:178)
    at lambdainternal.EventHandlerLoader$2.call(EventHandlerLoader.java:888)
    at lambdainternal.AWSLambda.startRuntime(AWSLambda.java:292)
    at lambdainternal.AWSLambda.<clinit>(AWSLambda.java:64)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at lambdainternal.LambdaRTEn
    try.main(LambdaRTEntry.java:94)

这是失败的代码：

private Connection getRemoteConnection() throws Exception {
    Class.forName("org.postgresql.Driver");
    String dbName = System.getenv("RDS_DB_NAME");
    String userName = System.getenv("RDS_USERNAME");
    String password = System.getenv("RDS_PASSWORD");
    String hostname = System.getenv("RDS_HOSTNAME");
    String port = System.getenv("RDS_PORT");
    String jdbcUrl = "jdbc:postgresql://" + hostname + ":" + port + "/" + dbName + "?user=" + userName + "&password=" + password;
    log.info(String.format("Logging to DB: %s", jdbcUrl));
    return DriverManager.getConnection(jdbcUrl);
}

这可能是什么原因？

Answer 1

您必须在lambda中配置Network参数。您必须添加一个VPC和一个Security Group。

将此安全组添加到您的lambda后，您将转到网络和安全->安全组中的 EC2管理控制台 em> 。在这里，您可以选择RDS实例的安全组，然后编辑Inbound参数。您添加了Type的PostgreSQL和Custom Source，其名称为您刚添加到Lambda的安全组的名称。

AWS Lambda的“连接尝试失败” Postgres

1 个答案: