Hadoop环境搭配（hive环境配置）

Hadoop环境搭配（hive环境配置）

1、下载安装包：apache-hive-3.1.2-bin.tar.gz

上传至linux系统 /opt/software/ 路径

2、解压软件

cd /opt/software/
tar -zxvf apache-hive-3.1.2-bin.tar.gz -C /opt/module/

3、修改系统环境变量

vi /etc/profile

添加内容：

export HIVE_HOME=/opt/module/apache-hive-3.1.2-bin
export PATH=$PATH:$HADOOP_HOME/sbin:$HIVE_HOME/bin

4、重启环境配置，命令：

source /etc/profile

5、修改hive环境变量

cd  /opt/module/apache-hive-3.1.2-bin/bin/

①配置hive-config.sh文件

vi hive-config.sh

在编辑面板中添加如下代码：

export JAVA_HOME=/opt/module/jdk1.8.0_212
export HIVE_HOME=/opt/module/apache-hive-3.1.2-bin
export HADOOP_HOME=/opt/module/hadoop-3.2.0
export HIVE_CONF_DIR=/opt/module/apache-hive-3.1.2-bin/conf

6、在/opt/module/apache-hive-3.1.2-bin/conf/创建hive-site.xml配置文件

cd /opt/module/apache-hive-3.1.2-bin/conf/
vi hive-site.xml

修改Hive配置文件,找到对应的位置进行修改

 



    javax.jdo.option.ConnectionDriverName
    com.mysql.cj.jdbc.Driver
    Driver class name for a JDBC metastore
  

    javax.jdo.option.ConnectionUserName
    root
    Username to use against metastore database
  

    javax.jdo.option.ConnectionPassword
    123456
    password to use against metastore database
  

    javax.jdo.option.ConnectionURL
jdbc:mysql://192.168.1.100:3306/hive?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=GMT
    
      JDBC connect string for a JDBC metastore.
      To use SSL to encrypt/authenticate the connection, provide database-specific SSL flag in the connection URL.
      For example, jdbc:postgresql://myhost/db?ssl=true for postgres database.
    
  
  
    datanucleus.schema.autoCreateAll
    true
    Auto creates necessary schema on a startup if one doesn't exist. Set this to false, after creating it once.To enable auto create also set hive.metastore.schema.verification=false. Auto creation is not recommended for production use cases, run schematool command instead.
  

    hive.metastore.schema.verification
    false
    
      Enforce metastore schema version consistency.
      True: Verify that version information stored in is compatible with one from Hive jars.  Also disable automatic
            schema migration attempt. Users are required to manually migrate schema after Hive upgrade which ensures
            proper metastore schema migration. (Default)
      False: Warn if the version information stored in metastore doesn't match with one from in Hive jars.
    
  

    hive.exec.local.scratchdir
    /opt/module/apache-hive-3.1.2-bin/tmp/${user.name}
    Local scratch space for Hive jobs
  
  
system:java.io.tmpdir
/opt/module/apache-hive-3.1.2-bin/iotmp


 
  
    hive.downloaded.resources.dir
/opt/module/apache-hive-3.1.2-bin/tmp/${hive.session.id}_resources
    Temporary local directory for added resources in the remote file system.
  

    hive.querylog.location
    /opt/module/apache-hive-3.1.2-bin/tmp/${system:user.name}
    Location of Hive run time structured log file
  
  
    hive.server2.logging.operation.log.location
/opt/module/apache-hive-3.1.2-bin/tmp/${system:user.name}/operation_logs
    Top level directory where operation logs are stored if logging functionality is enabled
  
  
    hive.metastore.db.type
    mysql
    
      Expects one of [derby, oracle, mysql, mssql, postgres].
      Type of database used by the metastore. Information schema & JDBCStorageHandler depend on it.
    
  
  
    hive.cli.print.current.db
    true
    Whether to include the current database in the Hive prompt.
  
  
    hive.cli.print.header
    true
    Whether to print the names of the columns in query output.
  
  
    hive.metastore.warehouse.dir
    /opt/hive/warehouse
    location of default database for the warehouse
  

7、上传mysql驱动包到/opt/module/apache-hive-3.1.2-bin/lib/文件夹下
驱动包：mysql-connector-java-8.0.15.zip，解压后从里面获取jar包
8、进入数据库，在数据库中新建名为hive的数据库，确保 mysql数据库中有名称为hive的数据库

mysql> create database hive;

9、初始化元数据库，命令：

schematool -dbType mysql -initSchema

10、群起，命令：

start-all.sh    Hadoop100上
start-yarn.sh    Hadoop101上

11、启动hive，命令：

hive

12、检测是否启动成功，命令：

show databases;

出现各类数据库，则启动成功