[英]Unable to Access RDS with JDBC in AWS
I am finding hard time connecting to RDS using JDBC connection, I am able to connect through MYSQL workbench, I deployed my WAR file in A WSwhich is running tomcat, this WAR file has my JDBCcode connecting to RDS, but I am not even able to establish connection.我发现很难使用 JDBC 连接连接到 RDS,我能够通过 MYSQL 工作台连接,我将我的 WAR 文件部署在运行 tomcat 的 WS 中,这个 WAR 文件有我的 JDBCcode 连接到 RDS,但我什至无法建立连接。 My code is as below:-
我的代码如下: -
public static Connection getconnection(){
String connectionUrl = "jdbc:mysql://testinstance.cj3ixhryi3fb.us-west-2.rds.amazonaws.com:3306/testDB";
String dbUser = "testuser";
String dbPwd = "usertest";
Connection conn = null;
try {
conn = (Connection) DriverManager.getConnection(connectionUrl, dbUser, dbPwd);
System.out.println("conn Available");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("fetch otion error"+e.getLocalizedMessage());
}
return conn;
}
I included all the necessary jar files, and rules security groups but no luck.我包含了所有必要的 jar 文件和规则安全组,但没有运气。
I am using the EC2 security group for RDS.我正在为 RDS 使用 EC2 安全组。 Does RDS will use ec2 security groups?
RDS 会使用 ec2 安全组吗? or I need to have different security group for RDS?
或者我需要为 RDS 设置不同的安全组?
the testinstance is a working link if any one wanna test.如果有人想测试,testinstance 是一个工作链接。
It could be that your instance is in a VPC and your RDS instance isn't set up in a VPC subnet group.可能是您的实例位于 VPC 中,而您的 RDS 实例未设置在 VPC 子网组中。
If you want to connect to an RDS instance from a server instance in a VPC, your RDS instance has to be deployed in a VPC subnet.如果您想从 VPC 中的服务器实例连接到 RDS 实例,您的 RDS 实例必须部署在 VPC 子网中。
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_VPC.CreateDBSubnetGroup.html http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_VPC.CreateDBSubnetGroup.html
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