1、安装新版mysql前，需将系统自带的mariadb-lib卸载
rpm -qa|grep mariadb
[[email protected]]# mariadb-libs-5.5.44-2.el7.centos.x86_64
rpm -e --nodeps mariadb-libs-5.5.44-2.el7.centos.x86_64
2、下载mysql离线包
下载地址：https://dev.mysql.com/downloads/mysql/#downloads
解压：tar xvf mysql-5.7.16-1.el7.x86_64.rpm-bundle.tar
3、创建mysql的yum源
createrepo mysql目录
添加yum源文件
4、安装mysql
yum install mysql-server
5、获取mysql密码
密码在/var/log/mysqld.log里，获取：grep "password" /var/log/mysqld.log
用该密码登录到服务端后，必须马上修改密码，不然会报如下错误：
mysql> select user();
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
如果只是修改为一个简单的密码，会报以下错误：
mysql> ALTER USER USER() IDENTIFIED BY ‘12345678‘;
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
这个其实与validate_password_policy的值有关。
参考：https://www.cnblogs.com/ivictor/p/5142809.html
6、修改密码
set global validate_password_policy=0;
set global validate_password_length=1;
ALTER USER USER() IDENTIFIED BY ‘12345678‘;
或：set password=password(‘mysql‘);
7、设置mysql开机启动
// 检查是否已经是开机启动
systemctl list-unit-files | grep mysqld
// 开机启动
systemctl enable mysqld.service
8、创建用户，分配权限，远程登陆授权
mysql -uroot -pmysql
GRANT ALL PRIVILEGES ON *.* TO ‘root‘@‘%‘ IDENTIFIED BY ‘mysql‘ WITH GRANT OPTION;
FLUSH PRIVILEGES;
初始化hive库
mysql -u root -pmysql
CREATE USER ‘hive‘@‘%‘ IDENTIFIED BY ‘hive‘;
GRANT ALL PRIVILEGES ON *.* TO ‘hive‘@‘%‘;
CREATE USER ‘hive‘@‘localhost‘ IDENTIFIED BY ‘hive‘;
GRANT ALL PRIVILEGES ON *.* TO ‘hive‘@‘localhost‘;
CREATE USER ‘hive‘@‘hostname‘ IDENTIFIED BY ‘hive‘;
GRANT ALL PRIVILEGES ON *.* TO ‘hive‘@‘hostname‘;
FLUSH PRIVILEGES;
CREATE DATABASE `hive` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;