73.Zookeeper实现HiveServer2的HA

• Hive版本必须0.14or以上
• CM和CDH版本：5.13.0
• 未启用Kerberos

• 在HiveServer2中增加如下配置
  • 保存配置，根据提示重启服务

    hive.server2.support.dynamic.service.discovery
    true


    hive.server2.zookeeper.namespace
    hiveserver2_zk


    hive.zookeeper.quorum
    ip-186-31-10-118.fayson.com:2181,ip-186-31-5-190.fayson.com:2181,ip-186-31-6-148.fayson.com:2181


    hive.zookeeper.client.port
    2181

• 通过zookeeper-client命令查看，HiveServer2已在Zookeeper注册成功

[root@ip-186-31-6-148 ~]# zookeeper-client 
[zk: localhost:2181(CONNECTED) 0] ls /
[hiveserver2_zk, hive_zookeeper_namespace_hive, hbase, zookeeper]
[zk: localhost:2181(CONNECTED) 1] ls /hiveserver2_zk
[serverUri=ip-186-31-6-148.fayson.com:10000;version=1.1.0-cdh5.13.0;sequence=0000000006, serverUri=ip-186-31-5-190.fayson.com:10000;version=1.1.0-cdh5.13.0;sequence=0000000005]
[zk: localhost:2181(CONNECTED) 25] 

• HiveServer2注册Zookeeper后，JDBC连接的URL格式为：

jdbc:hive2:///;ServiceDiscoveryMode=zookeeper;zooKeeperNameSpace=hiveserver2

• Beeline连接HiveServer2服务

[root@ip-186-31-6-148 ~]# beeline 
beeline> !connect jdbc:hive2://ip-186-31-10-118.fayson.com:2181,ip-186-31-5-190.fayson.com:2181,ip-186-31-6-148.fayson.com:2181/;serviceDiscoveryMode=zooKeeper;zooKeeperNamespace=hiveserver2_zk
.... 
17/11/10 08:23:26 [main]: INFO jdbc.HiveConnection: Connected to ip-186-31-6-148.fayson.com:10000
...
0: jdbc:hive2://ip-186-31-10-118.fayson.com:2> select * from test;
...
INFO  : OK
+----------+----------+--+
| test.s1  | test.s2  |
+----------+----------+--+
| 11       | 222      |
+----------+----------+--+
1 row selected (3.516 seconds)
0: jdbc:hive2://ip-186-31-10-118.fayson.com:2>

• 停止ip-186-31-6-148.fayson.com的HivServer2服务
• Beeline再次连接

[root@ip-186-31-6-148 ~]# beeline 
beeline> !connect jdbc:hive2://ip-186-31-10-118.fayson.com:2181,ip-186-31-5-190.fayson.com:2181,ip-186-31-6-148.fayson.com:2181/;serviceDiscoveryMode=zooKeeper;zooKeeperNamespace=hiveserver2_zk
...
17/11/10 08:34:27 [main]: INFO jdbc.HiveConnection: Connected to ip-186-31-5-190.fayson.com:10000
0: jdbc:hive2://ip-186-31-10-118.fayson.com:2> select * from test;
+----------+----------+--+
| test.s1  | test.s2  |
+----------+----------+--+
| 11       | 222      |
+----------+----------+--+
1 row selected (2.103 seconds)
0: jdbc:hive2://ip-186-31-10-118.fayson.com:2> 

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