从正在运行的实例获取弹性IP [英] Get Elastic IP from running instance

问题描述

从运行在EC2实例上的Java应用程序中，我想知道从管理控制台手动分配的我自己的弹性IP地址。有没有办法为此查询EC2 API？

From a java application running on an EC2 instance, I'd like to know what my own elastic IP address that was manually assigned from the management console. Is there a way to query EC2 API for this?

推荐答案

如果您使用的是Linux ec2实例，则应该可以：

If you using a linux ec2 instance this should work:

命令：

curl http://169.254.169.254/latest/meta-data/public-ipv4

Java代码：

public static String getIP() throws IOException, InterruptedException {
    Process p = Runtime.getRuntime().exec("curl http://169.254.169.254/latest/meta-data/public-ipv4");
    int returnCode = p.waitFor();
    if ( returnCode == 0 ) {
        BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream()));
        String ip = r.readLine();
        r.close();
        return ip;
    }
    else {
        //handle error
        return null;
    }
}

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