在 CentOS 安装 MySQL
注意
本文档仅供参考，不适用于正式环境部署，正式环境建议使用专业的MySQL服务（比如腾讯云的MySQL产品）
环境
CentOS 7.3 版本
安装 mysql yum源
wget https://repo.mysql.com//mysql57-community-release-el7-11.noarch.rpm
yum localinstall mysql57-community-release-el7-11.noarch.rpm
安装成功后，查看MySQL版本：
yum repolist all | grep mysql
输出结果：
mysql-cluster-7.5-community/x86_64 MySQL Cluster 7.5 Community 禁用
mysql-cluster-7.5-community-source MySQL Cluster 7.5 Community - 禁用
mysql-cluster-7.6-community/x86_64 MySQL Cluster 7.6 Community 禁用
mysql-cluster-7.6-community-source MySQL Cluster 7.6 Community - 禁用
!mysql-connectors-community/x86_64 MySQL Connectors Community 启用: 221
mysql-connectors-community-source MySQL Connectors Community - S 禁用
!mysql-tools-community/x86_64 MySQL Tools Community 启用: 135
mysql-tools-community-source MySQL Tools Community - Source 禁用
mysql-tools-preview/x86_64 MySQL Tools Preview 禁用
mysql-tools-preview-source MySQL Tools Preview - Source 禁用
mysql55-community/x86_64 MySQL 5.5 Community Server 禁用
mysql55-community-source MySQL 5.5 Community Server - S 禁用
mysql56-community/x86_64 MySQL 5.6 Community Server 禁用
mysql56-community-source MySQL 5.6 Community Server - S 禁用
!mysql57-community/x86_64 MySQL 5.7 Community Server 启用: 544
mysql57-community-source MySQL 5.7 Community Server - S 禁用
mysql80-community/x86_64 MySQL 8.0 Community Server 禁用
mysql80-community-source MySQL 8.0 Community Server - S 禁用
安装MySQL
yum install mysql-community-server
1.如遇以下报错，可尝试运行
yum install mysql-community-server --nogpgcheck安装
Public key for mysql-community-libs-compat-5.7.37-1.el7.x86_64.rpm is not installed
Failing package is: mysql-community-libs-compat-5.7.37-1.el7.x86_64 GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
2.如遇以下报错，可执行yum module disable mysql后重试安装
All matches were filtered out by modular filtering for argument: mysql-community-serve
Error: Unable to find a match: mysql-community-server
配置MySQL服务
安装好的MySQL配置文件路径是/etc/my.cnf，这里可以根据需要调整，比如可以调整：
- datadir：MySQL存放数据的路径，如果有额外挂载磁盘，可以考虑指向相关路径
启动MySQL服务
systemctl start mysqld
确认MySQL正常启动
systemctl status mysqld
查看生成 MySQL root用户临时密码：
grep 'temporary password' /var/log/mysqld.log
修改root用户密码
连接MySQL服务
$ mysql -uroot -p
# 输出上述查询到的临时密码
修改root用户的密码（下面是改成 Password@2021，这里根据自行需要进行调整）：
ALTER USER 'root'@'localhost' IDENTIFIED BY 'Password@2021';