centos7-安装mysql8

留坑: 是否了解 rpm/yum/repo之间的关系

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1. 官网下载rpm源

MySQL Community Downloads

2. rz -be 上传下载的 mysql80-community-release-el7-3.noarch.rpm 文件到 centos7 某个任一目录下:

3. 将rpm -ivh mysql80-community-release-el7-3.noarch.rpm

4. 而后进入: cd /etc/yum.repos.d/ 发现多了mysql的:

[root@niewj yum.repos.d]# ll
总用量 20
-rw-r--r-- 1 root root 1023 5月  29 15:37 CentOS-Base.repo
-rw-r--r-- 1 root root  323 5月  29 15:37 epel.repo
-rw-r--r-- 1 root root 2076 4月  25 2019 mysql-community.repo
-rw-r--r-- 1 root root 2108 4月  25 2019 mysql-community-source.repo
-rw-r--r-- 1 root root  182 6月   1 13:10 nginx.repo

5. 然后 yum clean all yum makecache

6. yum install mysql-community-server完成即可;

7. 加入systemd管理:

开机启动: systemctl enable mysqld.service
停止服务: systemctl stop mysqld.service
启动服务: systemctl start  mysqld.service
重启服务: systemctl restart  mysqld.service
查看状态: systemctl status mysqld.service
上面的".service"都是可以省略的

8. 默认防火墙是没开的, 如果需要开:

centos7  默认的防火墙是  firewalld 
放开  3306端口：
firewall-cmd --zone=public --add-port=3306/tcp --permanent
firewall-cmd --reload;  //重新加载配置

9.grep "password" /var/log/mysqld.log

找到mysql按照默认初始化的密码:

10. 用户和访问设置:

登录MySQL修改mysql用户密码
mysql -u root -p

#修改密码
alter user 'root'@'localhost' identified by  'mypasswd!@#';

#远程设置
use mysql;
update user set host='%' where user='root';

#授权用户名的权限，赋予任何主机访问数据的权限
grant all privileges ON *.* to 'root'@'%' with grant option;
报错:ERROR 1410 (42000): You are not allowed to create a user with GRANT

update user set host='%' where user='root';
grant all privileges on *.* to 'root'@'%';

11. Navicat访问时报错:(mysql8特有)

alter user root identified with mysql_native_password by mypasswd!@#';