配置kerberos后Hbase连接以及出现的GSSException

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白神来了
2016.07.08 14:32* 字数 235

与hive类似,Hbase的连接可以使用命令行和Java API,另外Hbase还可以使用thrift和rest进行连接。

命令行

在使用hbase shell命令打开hbase交互界面之前使用kinit命令进行认证即可。

HBase native APIs

同hive连接一样,http://192.168.2.206:8090/x/ZIAU,需添加hadoop.security.authentication的Kerberos设置和使用UserGroupInformation进行认证。

package com.EXAMPLE.hbasetest;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.*;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.hbase.client.HTable;
public class Hbasetest {
    static Configuration conf = null;
    static {
        conf = HBaseConfiguration.create();
        conf.set("hbase.zookeeper.quorum", "test-1");
        conf.set("hbase.zookeeper.property.clientPort", "2181");
        conf.set("hadoop.security.authentication", "Kerberos");
        conf.set("hbase.security.authentication", "kerberos");
        conf.set("hbase.master.kerberos.principal", "hbase/test-1@EXAMPLE.COM");
        conf.set("hbase.regionserver.kerberos.principal", "hbase/_HOST@EXAMPLE.COM");
//上面一行必须和服务器中hbase-site.xml文件中的配置一样,这里principal的FQDN部分必须写成"_HOST",原因在于regionserver在test-1和test-2上都有布置
        UserGroupInformation.setConfiguration(conf);
        System.out.println("Principal Authentication: ");
        final String user = "jing/test-1@JUNIORCHINA.COM";
        final String keyPath = "/home/jing/jing.keytab";
        try {
            UserGroupInformation.loginUserFromKeytab(user, keyPath);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    public static void putMap(Map<String, Object> map, Result result, String tablename, String name)
            throws UnsupportedEncodingException {
        byte[] b = null;
        b = result.getValue(Bytes.toBytes(tablename), Bytes.toBytes(name));
        if (b != null) {
            String bstr = new String(b, "UTF-8");
            map.put(name, bstr);
        } else {
            map.put(name, null);
        }
    }
    public static void main(String[] args) throws IOException {
        String tableName = "EXAMPLE";
        String rowKey = "EXAMPLE";
        Get get = new Get(Bytes.toBytes(rowKey));
        HTable table = new HTable(conf, Bytes.toBytes(tableName));// 获取表
        Result result = table.get(get);
        Map<String, Object> map = new HashMap<String, Object>();
        putMap(map, result, "tablename", "name");
        for (int i = 0; i < 10; i++) {
            System.out.println(map.get("name"));
        }
        table.close();
    }
}
Dependency
<dependency>
  <groupId>org.apache.hbase</groupId>
  <artifactId>hbase-client</artifactId>
  <version>0.98.6-cdh5.3.0</version>
</dependency>

Thrift

thrift提供了各种语言对hbase的访问,下面以java为例

package com.example.thrifttest;
import org.apache.hadoop.hbase.thrift.generated.Hbase;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.thrift.TException;
import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.transport.TSocket;
import org.apache.thrift.transport.TTransport;
import org.apache.thrift.transport.TTransportException;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;  
import java.nio.charset.Charset;  
import java.nio.charset.CharsetDecoder;  

 
public class Thrifttest {
    
    static {
        
        System.out.println("Principal Authentication: ");
        final String user = "jing/test-1@EXAMPLE.COM";
        final String keyPath = "/home/jing/jing.keytab";
        try {
            UserGroupInformation.loginUserFromKeytab(user, keyPath);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    

        public static String byteBufferToString(ByteBuffer buffer) {  
            CharBuffer charBuffer = null;  
            try {  
                Charset charset = Charset.forName("UTF-8");  
                CharsetDecoder decoder = charset.newDecoder();  
                charBuffer = decoder.decode(buffer);  
                buffer.flip();  
                return charBuffer.toString();  
            } catch (Exception ex) {  
                ex.printStackTrace();  
                return null;  
            }  
        }  
        private void start()  {
            try {  
                TTransport socket = new TSocket("192.168.x.xxx", 9090);
                TProtocol protocol = new TBinaryProtocol(socket, true, true);
                Hbase.Client client = new Hbase.Client(protocol);  
                socket.open();  
                System.out.println("open");  
                try {  
                    System.out.println("scanning tables...");  
                    for (ByteBuffer name : client.getTableNames()) {  
                        System.out.println("find:" + byteBufferToString(name));  
                    }  
                } catch (Exception e) {  
                    e.printStackTrace();  
                }  
                socket.close();  
                System.out.println("close");  
            } catch (TTransportException e) {  
                e.printStackTrace();  
            } catch (TException e) {  
                e.printStackTrace();  
            }  
        
        
    }
    
    public static void main(String[] args) {
        Thrifttest c = new Thrifttest();
        c.start();
    }
}

错误

在之前使用Hbase Java API时运行时报错:
javax.security.sasl.SaslException: GSS initiate failed [Caused by org.apache.hadoop.ipc.RemoteException(javax.security.sasl.SaslException): GSS initiate failed]

原因在于代码中
conf.set("hbase.regionserver.kerberos.principal", "hbase/_HOST@EXAMPLE.COM");
这一行_HOST被写成了test-1,手动指定了regionserver。
可以参见
http://stackoverflow.com/questions/36265416/not-able-to-communicate-with-kerberos-enabled-hbase
以及
http://stackoverflow.com/questions/23561736/java-client-for-secure-hbase

hadoop
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