二进制安装mysql5.7

1.安装相关包

[root@CentOS8 ~]# yum  install libaio numactl-libs -y

2.创建用户和用户组

[root@CentOS8 ~]# groupadd mysql

[root@CentOS8 ~]# useradd -r -g mysql -s /bin/false mysql

3.创建存放数据库的文件

[root@CentOS8 ~]# mkdir -p /data/mysql

[root@CentOS8 ~]# chown mysql.mysql /data/mysql

4.下载对应的二进制文件包

网址：https://downloads.mysql.com/archives/community/

[root@CentOS8 ~]# tar -xzf mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz -C /usr/local/

[root@CentOS8 ~]# cd /usr/local/

[root@CentOS8 local]# ln -vs  mysql-5.7.38-linux-glibc2.12-x86_64/ mysql

[root@CentOS8 local]# chown -R root.root /usr/local/mysql/

5.更改环境变量

[root@CentOS8 ~]# echo 'PATH=/usr/local/mysql/bin:$PATH' > /etc/profile.d/mysql.sh

[root@CentOS8 ~]# . /etc/profile.d/mysql.sh

6.准备配置文件

[root@CentOS8 ~]# cat /etc/my.cnf

[mysqld]
datadir=/data/mysql
skip_name_resolve=1
socket=/data/mysql/mysql.sock
log-error=/data/mysql/mysql.log
pid-file=/data/mysql/mysql.pid

[client]
socket=/data/mysql/mysql.sock

7.生成root空密码

mysqld --initialize-insecure --user=mysql --datadir=/data/mysql  #初始化mysql数据库的时候会把root密码设置成一个空密码

#初始化生成mysql数据库的相关文件（和mysql5.6的不一样）

8.准备服务脚本和启动

[root@CentOS8 ~]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld

[root@CentOS8 ~]# chkconfig --add mysqld

[root@CentOS8 ~]# service mysqld start

9.测试登录

[root@CentOS8 ~]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.38 MySQL Community Server (GPL)

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Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

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