本节主要内容：
Hive环境搭建
1.系统环境：
OS：CentOS Linux release 7.5.1804 (Core)
CPU：2核心
Memory：1GB
运行用户：root
JDK版本：1.8.0_252
Hadoop版本：cdh5.16.2
2.集群各节点角色规划为：
172.26.37.245 node1.hadoop.com---->namenode，zookeeper，journalnode，hadoop-hdfs-zkfc，resourcenode，historyserver，hbase，hbase-master，hive，hive-metastore，hive-server2,hive-hbase
172.26.37.246 node2.hadoop.com---->datanode，zookeeper，journalnode，nodemanager，hadoop-client，mapreduce，hbase-regionserver
172.26.37.247 node3.hadoop.com---->datanode，nodemanager，hadoop-client，mapreduce，hive，mysql-server
172.26.37.248 node4.hadoop.com---->namenode，zookeeper，journalnode，hadoop-hdfs-zkfc，hive，hive-server2
3.环境说明：
本次追加部署
172.26.37.245 node1.hadoop.com---->hive，hive-metastore，hive-server2,hive-hbase，mysql-connector-java
172.26.37.246 node2.hadoop.com---->
172.26.37.246 node2.hadoop.com---->hive，mysql-server
172.26.37.248 node4.hadoop.com---->hive，hive-server2
一.安装
node1节点：
# yum install -y hive hive-metastore hive-server2 hive-hbase
node3节点：
# yum install -y hive mysql-server
node4节点：
# yum install -y hive hive-server2
二.数据库初始配置
启动mysql-server
# service mysqld start
mysql-server开机自启动
# chkconfig mysqld on
初始mysql-server配置(密码：123456)
# /usr/bin/mysql_secure_installation
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MySQL to secure it, we'll need the current
password for the root user. If you've just installed MySQL, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none):
OK, successfully used password, moving on...
Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.
Set root password? [Y/n] Y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
... Success!
By default, a MySQL installation has an anonymous user, allowing anyone
to log into MySQL without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.
Remove anonymous users? [Y/n] Y
... Success!
Normally, root should only be allowed to connect from 'localhost'. This
ensures that someone cannot guess at the root password from the network.
Disallow root login remotely? [Y/n] N
... skipping.
By default, MySQL comes with a database named 'test' that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.
Remove test database and access to it? [Y/n] Y
- Dropping test database...
ERROR 1008 (HY000) at line 1: Can't drop database 'test'; database doesn't exist
... Failed! Not critical, keep moving...
- Removing privileges on test database...
... Success!
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] Y
... Success!
All done! If you've completed all of the above steps, your MySQL
installation should now be secure.
Thanks for using MySQL!
Cleaning up...
三.安装mysql JDBC驱动
node1、node3、node4节点,metastore要连接数据库，所以要安装jdbc驱动
# yum -y install mysql-connector-java
将驱动链接到hive的lib库里
# ln -s /usr/share/java/mysql-connector-java.jar /usr/lib/hive/lib/mysql-connector-java.jar
创建hive所用文件夹(node1节点)
# sudo -u hdfs hadoop fs -mkdir -p /user/hive/warehouse
# sudo -u hdfs hadoop fs -chmod -R 1777 /user
# sudo -u hdfs hadoop fs -chown -R hive /user/hive
# sudo -u hdfs hadoop fs -chmod -R 1777 /
五.配置hive(node1、node3、node4节点)
# cp -p /usr/lib/hive/conf/hive-site.xml /usr/lib/hive/conf/hive-site.xml.20200703
# vi /usr/lib/hive/conf/hive-site.xml
变更为：
<configuration>
<property>
<name>javax.jdo.option.ConnectionURL</name>
<value>jdbc:mysql://node3.hadoop.com/metastore</value>
<description>the URL of the MySQL database</description>
</property>
<property>
<name>javax.jdo.option.ConnectionDriverName</name>
<value>com.mysql.jdbc.Driver</value>
</property>
<property>
<name>javax.jdo.option.ConnectionUserName</name>
<value>hive</value>
</property>
<property>
<name>javax.jdo.option.ConnectionPassword</name>
<value>hive</value>
</property>
<property>
<name>datanucleus.autoCreateSchema</name>
<value>false</value>
</property>
<property>
<name>datanucleus.fixedDatastore</name>
<value>true</value>
</property>
<property>
<name>datanucleus.autoStartMechanism</name>
<value>SchemaTable</value>
</property>
<property>
<name>hive.metastore.uris</name>
<value>thrift://172.26.37.245:9083</value>
<description>IP address (or fully-qualified domain name) and port of the metastore host</description>
</property>
<property>
<name>hive.metastore.schema.verification</name>
<value>true</value>
</property>
</configuration>
六.配置hive-server2(node1、node3、node4节点)
# vi /usr/lib/hive/conf/hive-site.xml
增加以下内容：
<property>
<name>hive.support.concurrency</name>
<description>Enable Hive's Table Lock Manager Service</description>
<value>true</value>
</property>
<property>
<name>hive.zookeeper.quorum</name>
<description>Zookeeper quorum used by Hive's Table Lock Manager</description>
<value>node1.hadoop.com,node2.hadoop.com,node4.hadoop.com</value>
</property>
七.数据库中创建metastore需要的用户和库(node3节点)
# mysql -uroot -p123456
#创建hive用户
mysql> CREATE USER 'hive'@'%' IDENTIFIED BY 'hive';
mysql> REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'hive'@'%';
mysql> GRANT ALL PRIVILEGES ON metastore.* TO 'hive'@'%';
mysql> grant all on *.* to 'hive'@'%' identified by 'hive';
mysql> FLUSH PRIVILEGES;
mysql> quit;
创建metastore数据库
mysql> CREATE DATABASE metastore;
八.初始化metastore数据库
# mysql -uroot -p123456
mysql> USE metastore;
mysql> source /usr/lib/hive/scripts/metastore/upgrade/mysql/hive-schema-1.1.0.mysql.sql;
mysql> update VERSION set SCHEMA_VERSION_V2 = '1.1.0-cdh5.12.0' where VER_ID=1;
九.启动服务
Node1节点
# service hive-metastore start
# service hive-metastore status
Node1、Node4节点
# service hive-server2 start
# service hive-server2 status
Node1节点
# ./hive --service metastore &
十.验证安装
# hive
Logging initialized using configuration in file:/etc/hive/conf.dist/hive-log4j.properties
WARNING: Hive CLI is deprecated and migration to Beeline is recommended.
hive> show tables;
OK
Time taken: 4.26 seconds
hive> show databases;
OK
default
Time taken: 0.086 seconds, Fetched: 1 row(s)
hive>
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