0031-如何在CDH启用Kerberos的情况下安装及使用Sentry(一)

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1.文档编写目的

---

本文档主要讲述如何在启用Kerberos的CDH集群中安装配置及使用Sentry。

• 内容概述

1.如何安装Sentry服务

2.Hive/Impala/Hue/HDFS服务如何与Sentry集成

3.Sentry测试

• 测试环境

1.操作系统为CentOS6.5

2.CM和CDH版本为5.11.1

3.采用root用户操作

• 前置条件

1.CDH集群运行正常

2.集群已启用Kerberos且正常使用

2.Sentry安装

---

1.在MySQL中创建sentry数据库

建表语句：

create database sentry default character set utf8;

CREATE USER ‘sentry’@’%’ IDENTIFIED BY ‘password’;

GRANT ALL PRIVILEGES ON sentry. * TO ‘sentry’@’%’;

FLUSH PRIVILEGES;

命令行操作：

[root@ip-172-31-6-148 527-hive-HIVEMETASTORE]# mysql -uroot -p
Enter password: 
...
mysql> create database sentry default character set utf8;
Query OK, 1 row affected (0.00 sec)
mysql> CREATE USER 'sentry'@'%' IDENTIFIED BY 'password';
Query OK, 0 rows affected (0.00 sec)
mysql> GRANT ALL PRIVILEGES ON sentry. * TO 'sentry'@'%';
Query OK, 0 rows affected (0.00 sec)
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
mysql> 

2.进入Cloudera Manager控制台点击“添加服务”

3.进入服务添加界面,选择Sentry服务，点击“继续”

4.选择Sentry Server及Gateway的安装节点，点击“继续”

5.输入Sentry服务的数据库信息，点击测试，测试通过，点击“继续”

6.等待服务安装成功，点击“继续”

7.点击“完成”，Sentry服务至此安装完成。

3.Sentry配置

3.1Hive配置

---

1.配置Hive使用Sentry服务

2.关闭Hive的用户模拟功能

3.2Impala配置

---

配置Impala使用Sentry

3.3Hue配置

---

配置Hue使用Sentry

3.4HDFS配置

---

配置HDFS开启ACLs与Sentry权限同步

完成以上配置后，回到Cloudera Manager主页，部署客户端配置并重启相关服务。

4.Sentry测试

4.1创建hive超级用户

---

使用hive用户登录Kerberos，操作如下

[root@ip-172-31-6-148 196-hive-HIVEMETASTORE]# kinit -kt hive.keytab hive/[email protected]   
[root@ip-172-31-6-148 196-hive-HIVEMETASTORE]# klist
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: hive/[email protected]

Valid starting     Expires            Service principal
09/07/17 02:26:04  09/08/17 02:26:04  krbtgt/[email protected]
        renew until 09/12/17 02:26:04
[root@ip-172-31-6-148 196-hive-HIVEMETASTORE]# 

1.使用beeline连接HiveServer2

[root@ip-172-31-6-148 196-hive-HIVEMETASTORE]# beeline 
Beeline version 1.1.0-cdh5.12.1 by Apache Hive
beeline> !connect jdbc:hive2://localhost:10000/;principal=hive/[email protected]
scan complete in 3ms
Connecting to jdbc:hive2://localhost:10000/;principal=hive/[email protected]
Connected to: Apache Hive (version 1.1.0-cdh5.12.1)
Driver: Hive JDBC (version 1.1.0-cdh5.12.1)
Transaction isolation: TRANSACTION_REPEATABLE_READ
0: jdbc:hive2://localhost:10000/>

2.创建admin角色

0: jdbc:hive2://localhost:10000/> create role admin;
...
INFO  : OK
No rows affected (0.37 seconds)
0: jdbc:hive2://localhost:10000/>

3.为admin角色赋予管理员权限

0: jdbc:hive2://localhost:10000_> grant_ all on server server1 to role admin;

…

INFO : OK

No rows affected (0.221 seconds)

0: jdbc:hive2://localhost:10000_>_

4.将admin角色授权给hive用户组

0: jdbc:hive2://localhost:10000_> grant_ role admin to group hive;

…

INFO : OK

No rows affected (0.162 seconds)

0: jdbc:hive2://localhost:10000_>_

以上操作创建了一个admin角色：

admin : 具有管理员权限，可以读写所有数据库，并授权给hive组（对应操作系统的组）

4.2创建test表

---

使用hive用户登录Kerberos，通过beeline登录HiveServer2，创建test表，并插入测试数据

0: jdbc:hive2://localhost:10000_> create_ tabletest (s1 string, s2 string) row format delimited fields terminated by ‘,’;

…

INFO : OK

No rows affected (0.592 seconds)

0: jdbc:hive2://localhost:10000> insert into test values(‘a’,‘b’),(‘1’,‘2’);

…

INFO : OK

No rows affected (20.123 seconds)

0: jdbc:hive2://localhost:10000_>_

4.3创建测试角色并将角色授权给用户组

---

创建两个角色：

read：只能读default库test表，并授权给fayson用户组

write：只能写default库test表，并授权给user_w用户组

注意：集群所有节点必须存在fayson和user_w用户，用户默认用户组与用户名一致，赋权是针对用户组而不是针对用户。

[root@ip-172-31-6-148 cdh-shell-master]# id fayson
uid=501(fayson) gid=501(fayson) groups=501(fayson)
[root@ip-172-31-6-148 cdh-shell-master]# useradd user_w
[root@ip-172-31-6-148 cdh-shell-master]# id user_w
uid=502(user_w) gid=502(user_w) groups=502(user_w)
[root@ip-172-31-6-148 cdh-shell-master]# 

1.使用hive用户创建read和write角色，并授权read角色对test表的select权限，write角色对test表的insert权限

0: jdbc:hive2://localhost:10000_> create_ role read;

…

INFO : OK

No rows affected (0.094 seconds)

0: jdbc:hive2://localhost:10000> grant select on table test torole read;

…

INFO : OK

No rows affected (0.1 seconds)

0: jdbc:hive2://localhost:10000> create role write;

…

INFO : OK

No rows affected (0.105 seconds)

0: jdbc:hive2://localhost:10000> grant insert on table test to role write;

…

INFO : OK

No rows affected (0.112 seconds)

0: jdbc:hive2://localhost:10000_>_

2.将read角色授权给fayson用户组，write角色授权给user_w用户组

0: jdbc:hive2://localhost:10000> grant role read to group fayson;
...
INFO  : OK
No rows affected (0.187 seconds)
0: jdbc:hive2://localhost:10000> grant role write to group user_w;
...
INFO  : OK
No rows affected (0.101 seconds)
0: jdbc:hive2://localhost:10000> 

3.使用kadmin创建fayson和user_w用户

[root@ip-172-31-6-148 ~]# kadmin.local
Authenticating as principal hive/[email protected] with password.
kadmin.local:  addprinc [email protected]
WARNING: no policy specified for [email protected]; defaulting to no policy
Enter password for principal "[email protected]": 
Re-enter password for principal "[email protected]": 
Principal "[email protected]" created.
kadmin.local:  addprinc [email protected]
WARNING: no policy specified for [email protected]; defaulting to no policy
Enter password for principal "[email protected]": 
Re-enter password for principal "[email protected]": 
Principal "[email protected]" created.
kadmin.local:  

4.4beeline验证

---

1.使用fayson用户登录Kerberos

[root@ip-172-31-6-148 ~]# kdestroy
[root@ip-172-31-6-148 ~]# kinit fayson
Password for [email protected]: 
[root@ip-172-31-6-148 ~]# klist
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: [email protected]

Valid starting     Expires            Service principal
09/07/17 02:48:35  09/08/17 02:48:35  krbtgt/[email protected]
        renew until 09/14/17 02:48:35
[root@ip-172-31-6-148 ~]# 

通过beeline连接HiveServer2进行验证

[root@ip-172-31-6-148 ~]# beeline 
Beeline version 1.1.0-cdh5.12.1 by Apache Hive
beeline> !connect jdbc:hive2://localhost:10000/;principal=hive/[email protected]
...
0: jdbc:hive2://localhost:10000/> show tables;
...
INFO  : OK
+-----------+--+
| tab_name  |
+-----------+--+
| test      |
+-----------+--+
1 row selected (0.403 seconds)
0: jdbc:hive2://localhost:10000/> select * from test;
...
INFO  : OK
+----------+----------+--+
| test.s1  | test.s2  |
+----------+----------+--+
| a        | b        |
| 1        | 2        |
| 111      | 222      |
| a        | b        |
| 1        | 2        |
| 333      | 5555     |
| eeee     | dddd     |
+----------+----------+--+
7 rows selected (0.282 seconds)
0: jdbc:hive2://localhost:10000/> insert into test values("2", "222");
Error: Error while compiling statement: FAILED: SemanticException No valid privileges
 User fayson does not have privileges for QUERY
 The required privileges: Server=server1->Db=default->Table=test->action=insert; (state=42000,code=40000)
0: jdbc:hive2://localhost:10000/> 

执行Hive的MapReduce任务

0: jdbc:hive2://localhost:10000/> select count(*) from test;
...
INFO  : OK
+------+--+
| _c0  |
+------+--+
| 7    |
+------+--+
1 row selected (30.688 seconds)
0: jdbc:hive2://localhost:10000/> 

2.使用user_w用户登录Kerberos

[root@ip-172-31-6-148 ~]# kdestroy
[root@ip-172-31-6-148 ~]# kinit user_w
Password for [email protected]: 
[root@ip-172-31-6-148 ~]# klist
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: [email protected]

Valid starting     Expires            Service principal
09/07/17 03:01:56  09/08/17 03:01:56  krbtgt/[email protected]
        renew until 09/14/17 03:01:56
[root@ip-172-31-6-148 ~]# 

使用beeline登录HiveServer2验证

[root@ip-172-31-6-148 ~]# beeline 
Beeline version 1.1.0-cdh5.12.1 by Apache Hive
beeline> !connect jdbc:hive2://localhost:10000/;principal=hive/[email protected]
...
0: jdbc:hive2://localhost:10000/> show tables;
...
INFO  : OK
+-----------+--+
| tab_name  |
+-----------+--+
| test      |
+-----------+--+
1 row selected (0.343 seconds)
0: jdbc:hive2://localhost:10000/> select  * from test;
Error: Error while compiling statement: FAILED: SemanticException No valid privileges
 User user_w does not have privileges for QUERY
 The required privileges: Server=server1->Db=default->Table=test->Column=s1->action=select; (state=42000,code=40000)
0: jdbc:hive2://localhost:10000/> insert into test values("2", "333");
...
INFO  : OK
No rows affected (19.379 seconds)
0: jdbc:hive2://localhost:10000/> 

验证总结：

fayson用户所属组为fayson拥有test表读权限，只能对test表进行select和count操作不能进行insert操作；

user_w用户所属组为user_w拥有test表写权限，只能对test表进行insert操作不能进行select操作；

4.5HDFS验证

---

1.使用fayson用户登录Kerberos，进行如下操作

使用HDFS命令对/user/hive/warehouse/test进行cat、ls、put等操作

[root@ip-172-31-6-148 ~]# hadoop fs -ls /user/hive/warehouse
ls: Permission denied: user=fayson, access=READ_EXECUTE, inode="/user/hive/warehouse":hive:hive:drwxrwx--x
[root@ip-172-31-6-148 ~]# hadoop fs -ls /user/hive/warehouse/test
Found 5 items
-rwxrwx--x+  3 hive hive          8 2017-09-05 12:52 /user/hive/warehouse/test/000000_0
-rwxrwx--x+  3 hive hive          8 2017-09-05 13:44 /user/hive/warehouse/test/000000_0_copy_1
-rwxrwx--x+  3 hive hive          8 2017-09-07 02:36 /user/hive/warehouse/test/000000_0_copy_2
-rwxrwx--x+  3 hive hive          6 2017-09-07 03:04 /user/hive/warehouse/test/000000_0_copy_3
-rwxrwx--x+  3 hive hive         19 2017-09-05 13:01 /user/hive/warehouse/test/test.txt
[root@ip-172-31-6-148 ~]# hadoop fs -cat /user/hive/warehouse/test/test.txt
333,5555
eeee,dddd
[root@ip-172-31-6-148 ~]# hadoop fs -rm /user/hive/warehouse/test/test.txt
rm: Failed to move to trash: hdfs://ip-172-31-6-148.fayson.com:8020/user/hive/warehouse/test/test.txt: Permission denied: user=fayson, access=WRITE, inode="/user/hive/warehouse/test":hive:hive:drwxrwx--x
[root@ip-172-31-6-148 ~]# hadoop fs -put a.txt /user/hive/warehouse/test/
put: Permission denied: user=fayson, access=WRITE, inode="/user/hive/warehouse/test":hive:hive:drwxrwx--x
[root@ip-172-31-6-148 ~]# 

2.使用user_w用户登录Kerberos，进行如下操作

[root@ip-172-31-6-148 ~]# kdestroy
[root@ip-172-31-6-148 ~]# kinit user_w
Password for [email protected]: 
[root@ip-172-31-6-148 ~]# hadoop fs -ls /user/hive/warehouse
ls: Permission denied: user=user_w, access=READ_EXECUTE, inode="/user/hive/warehouse":hive:hive:drwxrwx--x
[root@ip-172-31-6-148 ~]# hadoop fs -ls /user/hive/warehouse/test
ls: Permission denied: user=user_w, access=READ_EXECUTE, inode="/user/hive/warehouse/test":hive:hive:drwxrwx--x
[root@ip-172-31-6-148 ~]# hadoop fs -cat /user/hive/warehouse/test/test.txt
cat: Permission denied: user=user_w, access=READ, inode="/user/hive/warehouse/test/test.txt":hive:hive:-rwxrwx--x
[root@ip-172-31-6-148 ~]# hadoop fs -rm /user/hive/warehouse/test/test.txt
17/09/07 03:21:21 INFO fs.TrashPolicyDefault: Moved: 'hdfs://ip-172-31-6-148.fayson.com:8020/user/hive/warehouse/test/test.txt' to trash at: hdfs://ip-172-31-6-148.fayson.com:8020/user/user_w/.Trash/Current/user/hive/warehouse/test/test.txt
[root@ip-172-31-6-148 ~]# hadoop fs -put a.txt /user/hive/warehouse/test/
[root@ip-172-31-6-148 ~]# 

fayson用户所属组为fayson，拥有test表的读权限，可以对test表的数据目录（/user/hive/warehouse/test）浏览及查看目录下文件内容，不能删除/test/目录下文件，也不能向test目录put文件。

user_w用户所属组为user_w，拥有test表的write权限，可以对test表的数据目录put文件及删除数据文件操作，但不能浏览及查看目录下的文件内容。

说明Sentry实现了HDFS的ACL同步。

4.6Hue验证

---

1.使用Hue的管理员，添加Hue的测试用户fayson和user_w

2.使用fayson用户登录Hue，验证read权限

可以查看test表数据

可以进行Count操作

不能Insert操作

File Browser浏览

不能浏览父目录/user/hive/warehouse

可以浏览test表的数据目录/user/hive/warehouse/test

可以查看/user/hive/warehouse/test目录下文件内容

不能修改/user/hive/warehouse/test目录下数据文件

3.使用user_w用户登录Hue，验证write权限

不可以查看test表

不可以Count操作

可以向test表插入数据

FileBrowser操作

不可以浏览父目录/user/hive/warehouse

不可以浏览test表的数据目录/user/hive/warehouse/test

fayson和user_w用户均能通过hue界面看到test表，拥有read角色的fayson用户组能对test进行select和count操作，并且能通过File Browser浏览和查看test表的数据目录/user/hive/warehouse/test。拥有write角色的user_w用户组只能对test表进行insert操作，但不能通过File Browser浏览和查看test表的数据目录/user/hive/warehouse/test。说明Sentry在命令行的操作和授权在Hue中依旧有效。

4.7Impala验证

---

1.使用fayson用户登录Kerberos

[root@ip-172-31-6-148 ~]# kinit fayson
Password for [email protected]: 
[root@ip-172-31-6-148 ~]# klist
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: [email protected]

Valid starting     Expires            Service principal
09/07/17 06:36:05  09/08/17 06:36:05  krbtgt/[email protected]
        renew until 09/14/17 06:36:05
[root@ip-172-31-6-148 ~]# impala-shell 
Starting Impala Shell without Kerberos authentication
...
Connected to ip-172-31-9-33.fayson.com:21000
Server version: impalad version 2.9.0-cdh5.12.1 RELEASE (build 5131a031f4aa38c1e50c430373c55ca53e0517b9)
[ip-172-31-9-33.fayson.com:21000] > show tables;
Query: show tables
+------+
| name |
+------+
| test |
+------+
Fetched 1 row(s) in 0.02s
[ip-172-31-9-33.fayson.com:21000] > select * from test;
...
+--------+----------+
| s1     | s2       |
+--------+----------+
| testaa | testbbb  |
| 111    | 222      |
| 222    | 2323     |
| 2      | 333      |
| a      | b        |
| 1      | 2        |
| 1      | test     |
| 2      | fayson   |
| 3      | zhangsan |
| a      | b        |
| 1      | 2        |
+--------+----------+
Fetched 11 row(s) in 0.19s
[ip-172-31-9-33.fayson.com:21000] > select count(*) from test;
...
+----------+
| count(*) |
+----------+
| 11       |
+----------+
Fetched 1 row(s) in 0.14s
[ip-172-31-9-33.fayson.com:21000] > insert into test values('test44','test55');
Query: insert into test values('test44','test55')
Query submitted at: 2017-09-07 06:37:00 (Coordinator: http://ip-172-31-9-33.fayson.com:25000)
ERROR: AuthorizationException: User '[email protected]' does not have privileges to execute 'INSERT' on: default.test

[ip-172-31-9-33.fayson.com:21000] > 

2.使用user_w用户登录Kerberos

登录Impala-shell进行操作

[root@ip-172-31-6-148 ~]# impala-shell 
...
***********************************************************************************
Welcome to the Impala shell.
(Impala Shell v2.9.0-cdh5.12.1 (5131a03) built on Thu Aug 24 09:27:32 PDT 2017)

***********************************************************************************
[Not connected] > connect ip-172-31-9-33.fayson.com:21000;
Connected to ip-172-31-9-33.fayson.com:21000
Server version: impalad version 2.9.0-cdh5.12.1 RELEASE (build 5131a031f4aa38c1e50c430373c55ca53e0517b9)
[ip-172-31-9-33.fayson.com:21000] > show tables;
Query: show tables
+------+
| name |
+------+
| test |
+------+
Fetched 1 row(s) in 0.29s
[ip-172-31-9-33.fayson.com:21000] > select * from test;
Query: select * from test
Query submitted at: 2017-09-07 06:31:23 (Coordinator: http://ip-172-31-9-33.fayson.com:25000)
ERROR: AuthorizationException: User '[email protected]' does not have privileges to execute 'SELECT' on: default.test

[ip-172-31-9-33.fayson.com:21000] > insert into test values('222','2323');
Query: insert into test values('222','2323')
Query submitted at: 2017-09-07 06:32:07 (Coordinator: http://ip-172-31-9-33.fayson.com:25000)
Query progress can be monitored at: http://ip-172-31-9-33.fayson.com:25000/query_plan?query_id=ec406e621c7534c7:6bcbbd5300000000
Modified 1 row(s) in 0.63s
[ip-172-31-9-33.fayson.com:21000] > 

验证总结：

Impala与Sentry集成后可以使用Sentry来进行权限管理，拥有read角色的fayson用户组只能对test表进行select和count操作不能插入数据，拥有write角色的user_w

用户组只能对test表插入数据不能进行select和count操作。说明Sentry实现了Hive权限与Impala的同步。

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