Centos7离线安装mysql8 glibc版本

1.查看mysql是否安装

yum list installed mysql*
或者：
rpm -qa | grep -i mysql

2.卸载

yum remove mysql*

3.删除残留文件

find / -name mysql

rm -rf /var/lib/mysql
rm -rf /etc/my.cnf
rm -rf /etc/profile.d/mysql.sh
rm -rf /etc/init.d/mysql

4.杀掉进程

ps -ef|grep mysql

5.建用户
useradd mysql

6.切用户

su - mysql

7.参考官方安装文档：https://dev.mysql.com/doc/refman/8.0/en/binary-installation.html

8.安装依赖包-root

yum install libaio

9.删除原有mariadb的配置文件-root

rm -rf /etc/my.cnf

10.下载glibc版本、解压、改文件名-mysql、建一些依赖目录

>wget https://mirrors.aliyun.com/mysql/MySQL-8.0/mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz
>tar xvf mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz
>mv mysql-8.0.28-linux-glibc2.12-x86_64 mysql-8.0.28

>cd mysql-8.0.28

>mkdir mysql-files

>chown mysql:mysql mysql-files

>chmod 750 mysql-files

>mkdir data

>chmod 755 data

11.初始化

>$HOME/mysql-8.0.28/bin/mysqld --initialize --user=mysql --basedir=$HOME/mysql-8.0.28 --datadir=$HOME/mysql-8.0.28/data

报错：

[MY-012582] [InnoDB] io_setup() failed with EAGAIN. Will make 5 attempts before giving up.
vi /etc/sysctl.conf

解决：root

vi /etc/sysctl.conf

fs.aio-max-nr=1045876
sysctl -p

12.建服务

>bin/mysql_ssl_rsa_setup --datadir=$HOME/mysql-8.0.28/data

>cp support-files/mysql.server /etc/init.d/mysql

>vi /etc/rc.d/init.d/mysql 修改2行：
basedir=/home/mysql/mysql-8.0.28
datadir=/home/mysql/mysql-8.0.28/data

13.启动、停止

[mysql@localhost mysql-8.0.28]$ service mysql start
Starting MySQL.. SUCCESS!
[mysql@localhost mysql-8.0.28]$ service mysql status
SUCCESS! MySQL running (121408)
[mysql@localhost mysql-8.0.28]$ service mysql stop
Shutting down MySQL.. SUCCESS!
[mysql@localhost mysql-8.0.28]$

12.改密码
/home/mysql/mysql-8.0.28/bin/mysql -uroot -p
alter user 'root'@'localhost' identified with mysql_native_password by '123456';
flush privileges;

13.开启远程连接

use mysql;
update user set host='your ip' where user='root'; //指定ip
update user set host='%' where user='root';//任意ip都可以连
flush privileges;