10.Hadoop:Hive环境搭建

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：

javax.jdo.option.ConnectionURL

jdbc:mysql://node3.hadoop.com/metastore

the URL of the MySQL database

javax.jdo.option.ConnectionDriverName

com.mysql.jdbc.Driver

javax.jdo.option.ConnectionUserName

hive

javax.jdo.option.ConnectionPassword

hive

datanucleus.autoCreateSchema

false

datanucleus.fixedDatastore

true

datanucleus.autoStartMechanism

SchemaTable

hive.metastore.uris

thrift://172.26.37.245:9083

IP address (or fully-qualified domain name) and port of the metastore host

hive.metastore.schema.verification

true

六.配置hive-server2(node1、node3、node4节点)

# vi /usr/lib/hive/conf/hive-site.xml

增加以下内容：

hive.support.concurrency

Enable Hive's Table Lock Manager Service

true

hive.zookeeper.quorum

Zookeeper quorum used by Hive's Table Lock Manager

node1.hadoop.com,node2.hadoop.com,node4.hadoop.com

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