JDK8 和 JDK17 下基于JDBC连接Kerberos认证的Hive(代码已测试通过)-Toy模板网

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0.背景

之前自研平台是基于jdk8开发的,连接带Kerberos的hive也是jdk8,现在想升级jdk到17,发现过Kerberos的hive有点不一样,特地记录

连接Kerberos,krb5.conf 和对应服务的keytab文件以及对应的principal肯定是需要提前准备的,
- 一般从服务器或者运维那里获取krb5.conf 与 Hive对应的keytab文件。
注意获取前先在服务器上用kinit -kt keytab_file_path principal命令检验一下 keytab文件和principal,确认:
- Hive开启了Kerberos认证
- keytab文件/principal/krb5.conf 是正确无误的/匹配的!
后文如果出现xxx类(UserGroupInformation/metrics2)找不到优先考虑hive的jdbc jar包问题,我推荐https://github.com/timveil/hive-jdbc-uber-jar 这个

想直接看源码?👉 https://github.com/mizuhokaga/kerberos-hive-jdb

1. JDK8 使用JDBC 连接 Kerberos认证的Hive

根据自身实际情况添加依赖

pom.xml

   <properties>
        <hive.version>2.1.1</hive.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.apache.hive</groupId>
            <artifactId>hive-jdbc</artifactId>
            <version>${hive.version}</version>
        </dependency>
    </dependencies>

HiveJdbcByJdk8.java

我在jdk8上连接并没有花太多时间,网上大多数JDK8过Kerberos代码也是这样的:

第一步设置系统属性,配置krb5.conf,
第二步通过UserGroupInformation设置principal 和对应的keytab文件

由于我们配置了

System.setProperty(“sun.security.krb5.debug”, “true”);

打开了debug后,如果是正常情况,我们能观察到控制台会打印到krb5.conf相关内容信息
出现问题优先根据debug日志查看,如果没有打印出krb5文件内容,去看看相关文件的路径是否存在或者是文件权限程序无法访问(建议测试时调777)

import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.conf.Configuration;

import java.io.IOException;
import java.sql.*;

public class HiveJdbcByJdk8 {
 public static void main(String[] args) throws ClassNotFoundException, IOException {

        // 1.加载Kerberos配置文件,必须写在Configuration对象之前
        System.setProperty("sun.security.krb5.debug", "true");
        System.setProperty("java.security.krb5.conf", "/home/guzhenzhen/yf-kerberos/test/krb5.conf");

        // 2.设置Kerberos认证
        Configuration configuration = new Configuration();
        configuration.set("hadoop.security.authentication", "Kerberos");
        UserGroupInformation.setConfiguration(configuration);
        UserGroupInformation.loginUserFromKeytab("hive/admin", "/home/guzhenzhen/yf-kerberos/test/hive.keytab");

        // 3.JDBC连接字符串
        String jdbcURL = "jdbc:hive2://yfashmd02.yfco.yanfengco.com:10000/test_jt;principal=hive/_HOST@AUTOEXPR.COM";

        Class.forName("org.apache.hive.jdbc.HiveDriver");

        try {
            // 4.创建Hive连接
            Connection connection = DriverManager.getConnection(jdbcURL, "", "");
            // 5.执行Hive查询
            Statement statement = connection.createStatement();
            ResultSet rs = statement.executeQuery("SELECT id,name,age FROM student");

            // 6.处理查询结果
            while (rs.next()) {
                System.out.println(rs.getInt(1) + "," + rs.getString(2) + "," + rs.getInt(3));
            }

            // 7.关闭连接
            rs.close();
            statement.close();
            connection.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }

    }
}

如果出现了

jdk8报错:Message stream modified (41)报错

需要注释krb5.conf 的renew_lifetime属性,解决问题来源https://bbs.huaweicloud.com/forum/thread-72437-1-1.html
下面是krb5.conf参考

[libdefaults]
#	default_realm = EXAMPLE.COM 
	default_realm = AUTOEXPR.COM
	dns_lookup_realm = false
	dns_lookup_kdc = false
	ticket_lifetime = 24h
#   jdk8报错:Message stream modified (41)报错,需要注释renew_lifetime
#   https://bbs.huaweicloud.com/forum/thread-72437-1-1.html
#	renew_lifetime = 7d
	allow_weak_crypto = true
	forwardable = true
	default_ccache_name = FILE:/tmp/krb5cc_%{uid}
	
[realms]
...
[domain_realm]
...
[logging]
...

下面出现的问题

Peer indicated failure: Unsupported mechanism type PLAIN

java.lang.NoClassDefFoundError: Could not initialize class org.apache.hadoop.security.UserGroupInformation

均可以通过搜索+更换jar包依赖替换解决问题,

2. JDK17 使用JDBC 连接 Kerberos认证的Hive

pom.xml

pom.xml不变

   <properties>
        <hive.version>2.1.1</hive.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.apache.hive</groupId>
            <artifactId>hive-jdbc</artifactId>
            <version>${hive.version}</version>
        </dependency>
    </dependencies>

第一种 HiveJdbcByJdk17

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.security.UserGroupInformation;

import java.io.IOException;
import java.sql.*;
public class HiveJdbcByJdk17 {

    public static void main(String[] args) throws ClassNotFoundException, IOException {

        // 1.加载Kerberos配置文件
//        System.setProperty("java.security.auth.login.config", "/home/guzhenzhen/yf-kerberos/test/gss-jaas.conf");
//        System.setProperty("sun.security.jgss.debug", "true");
//        System.setProperty("javax.security.auth.useSubjectCredsOnly", "false");
        System.setProperty("java.security.krb5.conf", "/home/guzhenzhen/yf-kerberos/test/krb5.conf");
        System.setProperty("sun.security.krb5.debug", "true");


        // 2.设置Kerberos认证
        Configuration configuration = new Configuration();
        configuration.set("hadoop.security.authentication", "Kerberos");
        UserGroupInformation.setConfiguration(configuration);
        UserGroupInformation.loginUserFromKeytab("hive/admin", "/home/guzhenzhen/yf-kerberos/test/hive.keytab");

        // 3.JDBC连接字符串
        String jdbcURL = "jdbc:hive2://yfashmd02.yfco.yanfengco.com:10000/test_jt;principal=hive/_HOST@AUTOEXPR.COM";

        Class.forName("org.apache.hive.jdbc.HiveDriver");

        try {
            // 4.创建Hive连接
            Connection connection = DriverManager.getConnection(jdbcURL, "", "");
//             5.执行Hive查询
            Statement statement = connection.createStatement();
            ResultSet rs = statement.executeQuery("SELECT id,name,age FROM student");

            // 6.处理查询结果
            while (rs.next()) {
                System.out.println(rs.getInt(1) + "," + rs.getString(2) + "," + rs.getInt(3));
            }

            // 7.关闭连接
            rs.close();
            statement.close();

            connection.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }

    }

}

代码本质和jdk8一模一样,但是会报错

Caused by: java.lang.IllegalAccessException: class org.apache.hadoop.security.authentication.util.KerberosUtil
cannot access class sun.security.krb5.Config (in module java.security.jgss)
because module java.security.jgss does not export sun.security.krb5 to unnamed module @770c2e6b

报错信息;
KerberosUtil 无法访问类sun.security.krb5.Config (in module java.security.jgss) 因为java.security.jgss没有向未命名模块到出java.security.jgss

官网文档写了sun.security.krb5.Config 包位于java8中的rt.jar,从java9之后rt.jar and tools.jar 了
在Java 9及之后引入的模块系统中，模块必须显式声明它们要导出的包，以便其他模块可以访问。

一个简单的解决办法,添加JVM启动参数来临时解决这个问题(来源https://www.baeldung.com/spring-security-kerberos-integration):

–add-exports=java.security.jgss/sun.security.krb5=ALL-UNNAMED

在idea中调试中,我们
Run/Debug Configurations ->Modify options -> add VM options,在VM options的input框填入上述参数即可,具体参考图片
JDK8 和 JDK17 下基于JDBC连接Kerberos认证的Hive(代码已测试通过),hive,hadoop,数据仓库

若是jar包启动,则是 java --add-exports=java.security.jgss/sun.security.krb5=ALL UNNAMED -jar yourJarName.jar

第二种 HiveJdbcByJdk17

上面的代码集成到公司自研平台的项目代码我发现会报错:
Missing artifact jdk.tools:jdk.tools:jar:1.6 和 Missing artifact jdk.tools:jdk.tools:jar:1.7
查询发现是引入hive-jdbc 依赖时,hive-jdbc底层一些依赖需要用到,按网上的说法手动安装jar 到maven 本地仓库之后引入仍然不行,遂放弃引入 gss-jass.conf

通过配置gss-jaas.conf ,这样就不用导入UserGroupInformation和Configuration了,

当然VM options --add-exports=java.security.jgss/sun.security.krb5=ALL UNNAMED 还是要的

import java.io.IOException;
import java.sql.*;

public class HiveJdbcByJdk17 {

    public static void main(String[] args) throws ClassNotFoundException, IOException {

        // 1.加载Kerberos配置文件
        System.setProperty("java.security.auth.login.config", "/home/guzhenzhen/yf-kerberos/test/gss-jaas.conf");
        System.setProperty("sun.security.jgss.debug", "true");
        System.setProperty("javax.security.auth.useSubjectCredsOnly", "false");
        System.setProperty("java.security.krb5.conf", "/home/guzhenzhen/yf-kerberos/test/krb5.conf");
        System.setProperty("sun.security.krb5.debug", "true");


        // 2.设置Kerberos认证
//        Configuration configuration = new Configuration();
//        configuration.set("hadoop.security.authentication", "Kerberos");
//        UserGroupInformation.setConfiguration(configuration);
//        UserGroupInformation.loginUserFromKeytab("hive/admin", "/home/guzhenzhen/yf-kerberos/test/hive.keytab");

        // 3.JDBC连接字符串
        String jdbcURL = "jdbc:hive2://yfashmd02.yfco.yanfengco.com:10000/test_jt;principal=hive/_HOST@AUTOEXPR.COM";

        Class.forName("org.apache.hive.jdbc.HiveDriver");

        try {
            // 4.创建Hive连接
            Connection connection = DriverManager.getConnection(jdbcURL, "", "");
//             5.执行Hive查询
            Statement statement = connection.createStatement();
            ResultSet rs = statement.executeQuery("SELECT id,name,age FROM student");

            // 6.处理查询结果
            while (rs.next()) {
                System.out.println(rs.getInt(1) + "," + rs.getString(2) + "," + rs.getInt(3));
            }

            // 7.关闭连接
            rs.close();
            statement.close();

            connection.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }

    }

}

gss-jaas.conf 参考文章来源地址https://www.toymoban.com/news/detail-830164.html

com.sun.security.jgss.initiate{
   com.sun.security.auth.module.Krb5LoginModule required
   doNotPrompt=true
   useTicketCache=true
   useKeyTab=true
   renewTGT=true
   debug=true
   ticketCache="/tmp/krb5cc_1000"
   keyTab="/home/guzhenzhen/yf-kerberos/test/hive.keytab"
   principal="hive/admin@AUTOEXPR.COM";
 };