1. 查看是否以安装MySQL

我这里提供的 openEuler 服务器自带 MySQL 8.0

// 查看服务状态
systemctl status mysql

// 查询并卸载rpm包
rpm -qa | grep -i mysql
rpm -ev mysql-selinux-1.0.0-2.oe2203.noarch --nodeps 

// 查询关联文件 没用直接删
find / -name mysql

2.下载相关软件包

建议：由于函数调用风险，建议直接使用在openEuler官方编译移植过的mysql-5.7.21系列软件包

https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/x86_64/Packages/mysql5-5.7.21-3.oe1.x86_64.rpm
https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/x86_64/Packages/mariadb-common-10.3.9-9.oe1.x86_64.rpm
https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/x86_64/Packages/mysql5-common-5.7.21-3.oe1.x86_64.rpm
https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/x86_64/Packages/mysql5-server-5.7.21-3.oe1.x86_64.rpm
https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/x86_64/Packages/mysql5-errmsg-5.7.21-3.oe1.x86_64.rpm
https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/x86_64/Packages/mecab-0.996-2.oe1.x86_64.rpm

3. 安装

rpm -ivh mysql5-5.7.21-3.oe1.x86_64.rpm mariadb-common-10.3.9-9.oe1.x86_64.rpm mysql5-common-5.7.21-3.oe1.x86_64.rpm mysql5-server-5.7.21-3.oe1.x86_64.rpm mecab-0.996-2.oe1.x86_64.rpm mysql5-errmsg-5.7.21-3.oe1.x86_64.rpm

如果提示没有 my.cnf 相关依赖可添加 --nodeps 忽略依赖
提示mariadb冲突就卸载mariadb相关rpm
提示mecab冲突就卸载mecab相关rpm

4. 启动

注意 这里的服务名是 mysqld，觉得麻烦把它加到系统配置文件里

systemctl start mysqld

参考文档：https://www.openeuler.org/zh/blog/20220726-banqian-mysql/banqian-mysql.html