阿里云 centos 安装mysql+基本配置

查看当前linux环境，确定使用哪个版本的mysql

# rpm -q centos-release

centos-release-7-4.1708.el7.centos.x86_64

然后在这里 mysql-repo 找到对应的安装路径
比如根据服务器和mysql版本情况，我选择的是http://repo.mysql.com/yum/mysql-8.0-community/el/7/x86_64/

添加 Mysql 源头

cd /etc/yum.repos.d/

vim mysql.repo


# Enable to use MySQL 8.0

[mysql80-community]

name=MySQL 8.0 Community Server

baseurl=http://repo.mysql.com/yum/mysql-8.0-community/el/7/x86_64/

enabled=1

gpgcheck=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

验证 Mysql 源头

# yum repolist enabled | grep mysql

mysql80-community MySQL 8.0 Community Server

使用yum 安装 mysql

# yum install -y mysql-community-common mysql-community-libs mysql-community-client mysql-community-server mysql-community-devel


==========================================================================================

 Package 架构 版本 源 大小

==========================================================================================

正在安装:

 mysql-community-client x86_64 8.0.12-1.el7 mysql80-community 26 M

 mysql-community-common x86_64 8.0.12-1.el7 mysql80-community 541 k

 mysql-community-devel x86_64 8.0.12-1.el7 mysql80-community 4.0 M

 mysql-community-libs x86_64 8.0.12-1.el7 mysql80-community 2.2 M

      替换 mariadb-libs.x86_64 1:5.5.56-2.el7

 mysql-community-libs-compat x86_64 8.0.12-1.el7 mysql80-community 2.1 M

      替换 mariadb-libs.x86_64 1:5.5.56-2.el7

 mysql-community-server x86_64 8.0.12-1.el7 mysql80-community 349 M

为依赖而安装:

 libaio x86_64 0.3.109-13.el7 base 24 k



事务概要

==========================================================================================

安装 6 软件包 (+1 依赖软件包)

配置

包含数据初始化配置和基本建库步骤

启动Mysql服务

# service mysqld start

查看MySQL服务器的状态

# service mysqld status

设置开机启动

# chkconfig mysqld on

生成随机密码

# grep ‘temporary password’ /var/log/mysqld.log

2018-10-16T06:02:34.500574Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: nMXRrVN55

重新登录

# mysql -uroot -p
nMXRrVN55

选配如果嫌弃密码验证太麻烦，可以调低策略

mysql8 中使用 set global validate_password.policy=0;

mysql5.7 中使用 set global validate_password_policy=0;

配置Mysql 密码及其权限

# ALTER USER ‘root’@‘localhost’ IDENTIFIED BY ‘xxxxxx’;

查看用户

SELECT DISTINCT CONCAT(‘User: ‘’’,user,’’’@’’’,host,’’’;’) AS query FROM mysql.user;

创建用户

CREATE USER ‘code’@’%’ IDENTIFIED BY ‘xxxxxx’;

创建数据库

create database box_office default character set utf8mb4 collate utf8mb4_unicode_ci;

查看数据库

show databases;

授权

GRANT ALL ON box_office.* TO ‘code’@’%’;

查看授权

show grants for code@’%’;

更改用户密码

SET PASSWORD FOR ‘code’@’%’ = PASSWORD(“xxxxxx”);

取消授权

REVOKE privilege ON box_office.*FROM ‘code’@‘host’;

删除用户

DROP USER ‘code’@‘host’;

caching_sha2_password

Mac 版本的 Sequel Pro 1.1.2 看来还不支持 Mysql8 的登陆，会遇到这个错误，是由于 mysql8 默认使用了「caching_sha2_password」这个更高级的密码加密方式。

MySQL said: Authentication plugin ‘caching_sha2_password’ cannot be loaded: dlopen(/usr/local/lib/plugin/caching_sha2_password.so, 2): image not found

需要用户的密码加密方式，从「caching_sha2_password」改成「mysql_native_password」

使用以下命令使用户密码加密方式立即生效

ALTER USER ‘username’@‘ip_address’ IDENTIFIED WITH mysql_native_password BY ‘password’;

修改配置文件如下，vim /etc/my.cnf 保存后重启mysql

[mysqld]
default_authentication_plugin=mysql_native_password

不过我即使把这个问题解决了，还是用不上 Mysql8 ，打开会 Sequel Pro 会报错。

删除Mysql

查找mysql安装情况

rpm -qa|grep -i mysql


[root@iZbp1at7o13nmv0uakkppkZ ~]# rpm -qa|grep -i mysql

mysql-community-libs-8.0.12-1.el7.x86_64

mysql-community-devel-8.0.12-1.el7.x86_64

mysql-community-common-8.0.12-1.el7.x86_64

mysql-community-server-8.0.12-1.el7.x86_64

mysql-community-client-8.0.12-1.el7.x86_64

mysql-community-libs-compat-8.0.12-1.el7.x86_64

停止mysql服务，删除上面的列表包名

# service mysqld stop

# rpm -ev mysql-community-libs-8.0.12-1.el7.x86_64 --nodeps

# rpm -ev mysql-community-devel-8.0.12-1.el7.x86_64 --nodeps

# rpm -ev mysql-community-common-8.0.12-1.el7.x86_64 --nodeps

# rpm -ev mysql-community-server-8.0.12-1.el7.x86_64 --nodeps

# rpm -ev mysql-community-client-8.0.12-1.el7.x86_64 --nodeps

# rpm -ev mysql-community-libs-compat-8.0.12-1.el7.x86_64 --nodeps

查找mysql文件和库，并删除


[root@iZbp1at7o13nmv0uakkppkZ ~]# find / -name mysql
/var/lib/mysql
/var/lib/mysql/mysql
/etc/selinux/targeted/active/modules/100/mysql



[root@iZbp1at7o13nmv0uakkppkZ ~]# rm -rf /var/lib/mysql

[root@iZbp1at7o13nmv0uakkppkZ ~]# rm -rf /var/lib/mysql/mysql

[root@iZbp1at7o13nmv0uakkppkZ ~]# rm -rf /etc/selinux/targeted/active/modules/100/mysql

删除my.cnf

rm -rf /etc/my.cnf