CDH集群安装配置（四）- mysql 的安装

1. 安装mysql，并且创建相关的表（只需要在chd1上面安装而且需要root权限）1.1

• 查看Centos自带mysql是否已经安装

  yum list installed | grep mysql

• 卸载自带mariadb

# rpm -qa | grep mariadb
mariadb-libs-5.5.-.el7_0.x86_64
# rpm -e --nodeps mariadb-libs-5.5.-.el7_0.x86_64

• 如果系统的mysql已经安装，卸载

yum -y remove mysql-libs.x86_64
若有依赖关系，卸载依赖的包，知道显示结果complete

• 查看yum库上的mysql版本信息(CentOS系统需要正常连接网络)。

yum list | grep mysql 或 sudo yum -y list mysql*

• yum安装mysql数据库

wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
sudo rpm -ivh mysql-community-release-el7-5.noarch.rpm
sudo yum update
sudo yum install mysql-server
sudo systemctl start mysqld

mysql-server、mysql、mysql-devel都安装好，当结果显示为“Complete！”即安装完毕。
注：安装mysql只是安装了数据库，只有安装mysql-server才相当于安装了客户端。

• 设置开机启动

 systemctl enable mysqld

• 启动mysql

systemctl start mysqld

• 修改mysql密码

  mysql -uroot
  mysql>use mysql;
  mysql>update user set password=password('root') where user='root' and host='localhost';
  mysql>flush privileges;
  
  验证是否修改成功
  mysql -uroot -proot
  
  修改mysql 访问权限
  mysql> grant all privileges on *.* to 'root'@'mini1' identified by 'root';
  mysql> flush privileges;

  创建cdh默认的数据库

  GRANT ALL ON *.* TO 'root'@'%' identified by 'jesse@123';
  
  create database scm DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
  create database amon DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
  create database rman DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
  create database hue DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
  create database metastore DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
  create database sentry DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
  create database nav DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
  create database navms DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
  create database oozie DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
  
  GRANT ALL ON *.* TO 'scm'@'%' identified by 'jesse@123';
  GRANT ALL ON *.* TO 'amon'@'%' identified by 'jesse@123';
  GRANT ALL ON *.* TO 'rman'@'%' identified by 'jesse@123';
  GRANT ALL ON *.* TO 'hue'@'%' identified by 'jesse@123';
  GRANT ALL ON *.* TO 'hive'@'%' identified by 'jesse@123';
  GRANT ALL ON *.* TO 'sentry'@'%' identified by 'jesse@123';
  GRANT ALL ON *.* TO 'nav'@'%' identified by 'jesse@123';
  GRANT ALL ON *.* TO 'navms'@'%' identified by 'jesse@123';
  GRANT ALL ON *.* TO 'oozie'@'%' identified by 'jesse@123';
  
  flush privileges;