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CentOS配置Hive
hive搭建共分为三种模式：1、embedded，2、local，3、remote server
在这里，主要是配置第3种模式：remote server模式
我的环境共三台虚拟机：Host0,Host2，Host3
在remote server模式中，Host0：Hive-server2
Host2：Hive-metastore
Host3：MySQL server
1、分别在Host0，Host2和Host3中安装hive-server2，hive-metastore，mysql-server
yum install hive-server2 -y
yum install hive-metastore -y
yum install mysql-server -y
2、在MySQL server中创建hive数据库以及hive用户，并设置hive用户可以远程登录
create database hive;create user hive identified by ‘123456‘;grant all PRIVILEGES on *.* to hive@’%’ identified by ‘123456’;flush privileges;
3、在hive-metastore中设置hive配置文件，使其能连接到MySQL server
hive配置文件位置：/etc/hive/conf/hive-site.xml
向hive-site.xml中添加下列内容
<property> <name>javax.jdo.option.ConnectionURL</name> <value>jdbc:mysql://Host3:3306/hive?characterEncoding=UTF-8</value> <description>JDBC connect string for a JDBC metastore</description></property><property> <name>javax.jdo.option.ConnectionDriverName</name> <value>com.mysql.jdbc.Driver</value> <description>Driver class name for a JDBC metastore</description></property><property> <name>javax.jdo.option.ConnectionUserName</name> <value>hive</value></property><property> <name>javax.jdo.option.ConnectionPassword</name> <value>123456</value></property><property> <name>hive.metastore.warehouse.dir</name> <!-- base hdfs path --> <value>/user/hive/warehouse</value> <description>location of default database for the warehouse</description></property>
4、在hdfs上创建hive.metastore.warehouse.dir目录，并修改权限
sudo -u hdfs hadoop fs -mkdir -p /user/hive/warehousesudo -u hdfs hadoop fs -chown -R hive:hive /user/hive
5、在hive-server2中设置hive配置文件，使其能连接到hive-metastore
hive配置文件位置：/etc/hive/conf/hive-site.xml
向hive-site.xml中添加下列内容
<property> <name>hive.metastore.uris</name> <value>thrift://Host2:9083</value></property>
6、分别在Host0，Host2中启动hive-server2，hive-metastore
service hive-server2 startservice hive-metastore start7、在另一台虚拟机中进行测试（需要安装hive）
[root@client ~]# beeline which: no hbase in (/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/java/jdk1.8.0_60/bin:/root/bin)Beeline version 1.1.0-cdh5.8.0 by Apache Hivebeeline> !connect jdbc:hive2://Host0:10000scan complete in 11msConnecting to jdbc:hive2://Host0:10000Enter username for jdbc:hive2://Host0:10000: 1Enter password for jdbc:hive2://Host0:10000: *Connected to: Apache Hive (version 1.1.0-cdh5.8.0)Driver: Hive JDBC (version 1.1.0-cdh5.8.0)Transaction isolation: TRANSACTION_REPEATABLE_READ0: jdbc:hive2://Host0:10000> show tables;INFO : Compiling command(queryId=hive_20160912015858_bd9495d2-191f-429c-bf01-a165821b6d9a): show tablesINFO : Semantic Analysis CompletedINFO : Returning Hive schema: Schema(fieldSchemas:[FieldSchema(name:tab_name, type:string, comment:from deserializer)], properties:null)INFO : Completed compiling command(queryId=hive_20160912015858_bd9495d2-191f-429c-bf01-a165821b6d9a); Time taken: 0.027 secondsINFO : Concurrency mode is disabled, not creating a lock managerINFO : Executing command(queryId=hive_20160912015858_bd9495d2-191f-429c-bf01-a165821b6d9a): show tablesINFO : Starting task [Stage-0:DDL] in serial modeINFO : Completed executing command(queryId=hive_20160912015858_bd9495d2-191f-429c-bf01-a165821b6d9a); Time taken: 0.061 secondsINFO : OK+-----------+--+| tab_name |+-----------+--++-----------+--+No rows selected (0.389 seconds)
需要注意的是：如果在hiveserver2方式中没有使用Kerberos，则上述密码可以随意写
8、在Hive中创建表，并将数据导入表中
CREATE TABLE test(id int, A int, B int, C int) ROW FORMAT DELIMITED FIELDS TERMINATED BY ‘,‘;load data inpath ‘/user/sqoop/sample‘ into table test;
/user/sqoop/sample表中的数据格式为：11419,9,160,48格式
当执行load data inpath ‘/user/sqoop/sample‘ into table test;后，/user/sqoop/sample里的数据就mv到了/user/hive/warehouse/test中去了，/user/sqoop/sample目录为空。
CentOS配置Hive
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