CDH-Kerberos环境下，HBASE java连接

1. 下载相关配置文件

   登录CDH控制台，到HBASE的登录页面，下载相关的配置文件到本地
   

2. 新建maven项目，将相关的配置文件存放到src/resources目录下面

3. 登录kerberos主机，生成hbase的kerberos密钥文件。然后和krb5.conf一起下载到本地，也是同样存放到src/resources目录下面

4. 本地hosts文件填写相关的CDH集群信息

5. pom.xml的内容如下：

   <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
       <scala.version>2.10</scala.version>
       <spark.version>1.6.3</spark.version>
       <java.version>1.8</java.version>
   </properties>
   <dependencies>
       <!-- https://mvnrepository.com/artifact/org.apache.hbase/hbase-client -->
       <dependency>
           <groupId>org.apache.hbase</groupId>
           <artifactId>hbase-client</artifactId>
           <version>2.0.0</version>
       </dependency>
   
       <dependency>
           <groupId>org.scala-lang</groupId>
           <artifactId>scala-library</artifactId>
           <version>2.10.6</version>
       </dependency>
       <!-- https://mvnrepository.com/artifact/org.apache.spark/spark-core -->
       <dependency>
           <groupId>org.apache.spark</groupId>
           <artifactId>spark-core_${scala.version}</artifactId>
           <version>${spark.version}</version>
       </dependency>
       <!-- https://mvnrepository.com/artifact/org.apache.spark/spark-sql -->
       <dependency>
           <groupId>org.apache.spark</groupId>
           <artifactId>spark-sql_${scala.version}</artifactId>
           <version>${spark.version}</version>
       </dependency>
       <!-- https://mvnrepository.com/artifact/org.apache.spark/spark-hive -->
       <dependency>
           <groupId>org.apache.spark</groupId>
           <artifactId>spark-hive_${scala.version}</artifactId>
           <version>${spark.version}</version>
           <!--<scope>provided</scope>-->
       </dependency>
       <dependency>
           <groupId>junit</groupId>
           <artifactId>junit</artifactId>
           <version>4.4</version>
           <scope>test</scope>
       </dependency>
       <dependency>
           <groupId>org.apache.spark</groupId>
           <artifactId>spark-streaming_2.10</artifactId>
           <version>1.6.3</version>
           <!--<scope>provided</scope>-->
       </dependency>
   
       <dependency>
           <groupId>org.apache.kafka</groupId>
           <artifactId>kafka-clients</artifactId>
           <version>2.0.0</version>
       </dependency>
   
       <dependency>
           <groupId>org.apache.spark</groupId>
           <artifactId>spark-streaming-kafka-0-8_2.10</artifactId>
           <version>2.0.0</version>
       </dependency>
   </dependencies>
   

6. 代码如下：

   public class TestHbase {
       private static Configuration conf = null;
   
       static {
           String rootPath = System.getProperty("user.dir");
           String keytab = rootPath + "/src/main/resources/hbase.keytab";
           String krb5 = rootPath + "/src/main/resources/krb5.conf";
           System. setProperty("java.security.krb5.conf", krb5);
           conf = HBaseConfiguration.create();
           conf.set("hadoop.security.authentication" , "Kerberos" );
           // 这个hbase.keytab也是从远程服务器上copy下来的, 里面存储的是密码相关信息
           // 这样我们就不需要交互式输入密码了
           conf.set("keytab.file" , keytab );
           // 这个可以理解成用户名信息，也就是Principal
           conf.set("kerberos.principal" , "[email protected]" );
   
           UserGroupInformation. setConfiguration(conf);
           try {
               UserGroupInformation. loginUserFromKeytab("[email protected]", keytab );
           } catch (IOException e) {
               e.printStackTrace();
           }
       }
   
       public static void scanSpan( String tableName) throws Exception {
   
       }
       
       public static void main(String[] args) {
           try {
               TestHbase.scanSpan("user");
           } catch (Exception e) {
               e.printStackTrace();
           }
       }
   }
   

7. 运行主函数，结果如下：

   19/11/11 09:56:37 INFO security.UserGroupInformation: Login successful for user [email protected] using keytab file D:\code\ownProject\hbase_kerberos_test/src/main/resources/hbase.keytab