Hive扩展功能(五)--HiveServer2服务高可用

软件环境:

linux系统: CentOS6.7
Hadoop版本: 2.6.5
zookeeper版本: 3.4.8

主机配置:

一共m1, m2, m3这五部机, 每部主机的用户名都为centos

192.168.179.201: m1 
192.168.179.202: m2 
192.168.179.203: m3 

m1: Zookeeper, Namenode, DataNode, ResourceManager, NodeManager, Master, Worker
m2: Zookeeper, Namenode, DataNode, ResourceManager, NodeManager, Worker
m3: Zookeeper, DataNode, NodeManager, Worker

资料:

参考资料: 
    http://lxw1234.com/archives/2016/05/675.htm

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1.编辑hive-site.xml文件

vi  $HIVE_HOME/conf/hive-site.xml

<property>
    <name>spark.deploy.recoveryMode</name>
    <value>ZOOKEEPER</value>
</property>
<property>
    <name>hive.server2.support.dynamic.service.discovery</name>
    <value>true</value>
</property>
<property>
    <name>hive.server2.zookeeper.namespace</name>
    <value>hiveserver2_zk</value>
</property>
<property>
    <name>hive.zookeeper.quorum</name>
    <value>m1:2181,m2:2181,m3:2181</value>
</property>
<property>
    <name>hive.zookeeper.client.port</name>
    <value>2181</value>
</property>

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2.检验是否在zookeeper上注册

1. 先启动第一部须要服务高可用的主机上的HiveServer2服务

sh   $HIVE_HOME/bin/hiveserver2

1. 再启动第二部须要服务高可用的主机上的HiveServer2服务

sh   $HIVE_HOME/bin/hiveserver2

1. 在zookeeper所在的主机上查看

sh $ZK_HOME/bin/zkCli.sh

ls  /

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3.测试链接JDBC

JDBC链接的URL规范：

jdbc:hive2://<zookeeper quorum>/<dbName>;serviceDiscoveryMode=zooKeeper;zooKeeperNamespace=nameSpace

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语法解析:

<zookeeper quorum>                     # 为Zookeeper的集群连接串，如zkNode1:2181,zkNode2:2181,zkNode3:2181
<dbName>                               # 为Hive数据库(可不填, 默认为default)
serviceDiscoveryMode=zooKeeper         # 指定模式为zooKeeper
zooKeeperNamespace=nameSpace           # 指定ZK中的nameSpace，即参数hive.server2.zookeeper.namespace所定义，在hive-site.sh中定义为hiveserver2_zk

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测试链接:

(1)启动beeline服务:

sh  $HIVE_HOME/bin/beeline

(2)在beeline中输入如下链接指令:

!connect jdbc:hive2://m3:2181,m4:2181,m5:2181/;serviceDiscoveryMode=zooKeeper;zooKeeperNamespace=hiveserver2_zk

(3)如没使用HiveServer2服务高可用是,则链接beeline使用下列指令:

!connect jdbc:hive2://m1