Question

我使用com.cloudera.livy.Job类创建了一个示例Livy（Spark）应用程序，用于计算Pi的近似值（来源：https://github.com/cloudera/livy#using-the-programmatic-api），将其作为jar文件导出到例如： C:/path/to/the/pijob.jar。

实际上我正在从这样的另一个Main类运行这个工作（也从上面的链接复制并改编）：

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Properties;
import java.util.concurrent.ExecutionException;

import com.cloudera.livy.LivyClient;
import com.cloudera.livy.LivyClientBuilder;


public class Main {

    public static void main(String[] args) throws IOException, URISyntaxException, InterruptedException, ExecutionException {
        String livyUrl = "http://myserverIp:8998";
        String piJar = "C:/path/to/the/pijob.jar";
        int samples = 10000;

        LivyClient client = new LivyClientBuilder().setURI(new URI(livyUrl)).build();

        try {
            System.err.printf("Uploading %s to the Spark context...\n", piJar);
            client.uploadJar(new File(piJar)).get();

            System.err.printf("Running PiJob with %d samples...\n", samples);
            double pi = client.submit(new PiJob(samples)).get();

            System.out.println("Pi is roughly: " + pi);
        } finally {
            client.stop(true);
        }
    }
}

此应用程序在外部不受保护的Hadoop集群中完美运行（从我的客户端启动）。但是，当我尝试针对启用Kerberos的群集运行它时，它会失败。

我尝试在LivyClientBuilder类中设置相应的Kerberos属性：

Properties props = new Properties();
props.put("livy.environment", "production");
props.put("livy.impersonation.enabled", "true");
props.put("livy.server.auth.kerberos.keytab", "/etc/security/keytabs/spnego.service.keytab");
props.put("livy.server.auth.kerberos.principal", "HTTP/_HOST@MYCLUSTER.DE");
props.put("livy.server.auth.type", "kerberos");
props.put("livy.server.csrf_protection.enabled", "true");
props.put("livy.server.kerberos.keytab", "/etc/security/keytabs/livy.service.keytab");
props.put("livy.server.kerberos.principal", "livy/_HOST@MYCLUSTER.DE");
props.put("livy.server.port", "8998");
props.put("livy.server.session.timeout", "3600000");
props.put("livy.superusers", "zeppelin-MyCluster");

LivyClient client = new LivyClientBuilder().setAll(props).setURI(new URI(livyUrl)).build();

但我仍然有一个例外，说需要进行身份验证：

Exception in thread "main" java.lang.RuntimeException: java.io.IOException: Authentication required: <html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1"/>
<title>Error 401 </title>
</head>
<body>
<h2>HTTP ERROR: 401</h2>
<p>Problem accessing /sessions/. Reason:
<pre>    Authentication required</pre></p>
<hr /><i><small>Powered by Jetty://</small></i>
</body>
</html>

    at com.cloudera.livy.client.http.HttpClient.propagate(HttpClient.java:185)
    at com.cloudera.livy.client.http.HttpClient.<init>(HttpClient.java:85)
    at com.cloudera.livy.client.http.HttpClientFactory.createClient(HttpClientFactory.java:38)
    at com.cloudera.livy.LivyClientBuilder.build(LivyClientBuilder.java:124)
    at livy.Main.main(Main.java:34)
Caused by: java.io.IOException: Authentication required: <html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1"/>
<title>Error 401 </title>
</head>
<body>
<h2>HTTP ERROR: 401</h2>
<p>Problem accessing /sessions/. Reason:
<pre>    Authentication required</pre></p>
<hr /><i><small>Powered by Jetty://</small></i>
</body>
</html>

    at com.cloudera.livy.client.http.LivyConnection.sendRequest(LivyConnection.java:230)
    at com.cloudera.livy.client.http.LivyConnection.sendJSONRequest(LivyConnection.java:204)
    at com.cloudera.livy.client.http.LivyConnection.post(LivyConnection.java:180)
    at com.cloudera.livy.client.http.HttpClient.<init>(HttpClient.java:82)
    ... 3 more

此时的问题是给我的：

这些都是我需要的Kerberos设置吗？
- 或者我是否需要添加更多内容才能登录？
我是否必须在客户端计算机上提供配置文件/密钥标记？
- 或者我仍然可以使用服务器路径（就像我到目前为止所做的那样）？
Livy的Kerberos内容是否有一些有用的文档？

在启用Kerberos的Hadoop集群中运行Livy Job

0 个答案: