Centos7 YUM安装 MySQL5.7

1、卸载系统自带 mariadb

[root@localhost /]# rpm -qa|grep mariadb
mariadb-libs-5.5.68-1.el7.x86_64
[root@localhost /]# rpm -e --nodeps mariadb-libs-5.5.68-1.el7.x86_64
[root@localhost /]# rpm -qa|grep mariadb

2、下载并安装MySQL官方的 Yum

[root@localhost ~]#  wget http://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm
[root@localhost ~]# yum -y install mysql57-community-release-el7-11.noarch.rpm

3、使用yum方式安装mysql

[root@localhost ~]# yum install -y mysql mysql-server

4、安装过程中报错解决

问题描述

警告：/var/cache/yum/x86_64/7/mysql57-community/packages/mysql-community-common-5.7.41-1.el7.x86_64.rpm: 头V4 RSA/SHA256 Signature, 密钥 ID 3a79bd29: NOKEY
mysql-community-common-5.7.41-1.el7.x86_64.rpm 的公钥尚未安装


mysql-community-libs-compat-5.7.41-1.el7.x86_64.rpm 的公钥尚未安装

 失败的软件包是：mysql-community-libs-compat-5.7.41-1.el7.x86_64
 GPG  密钥配置为：file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

解决方案
运行命令：rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022
在重新安装

5、获取临时密码

运行命令：cat /var/log/mysqld.log | grep password

6、修改登录密码

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'Wxq3012@';
Query OK, 0 rows affected (0.00 sec)

7、初始化数据库

[root@localhost ~]# /usr/bin/mysql_secure_installation