（一）MySQL环境安装

MySQL

1. 下载并安装MySQL官方的Yum Repository

wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm

使用上面的命令直接安装Yum Repository

yum -y install mysql57-community-release-el7-10.noarch.rpm

2、安装MySQL

yum -y install mysql-community-server

3、启动MySQL

systemctl start mysqld.service
systemctl status mysqld.service

4、找到默认生成的root密码

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

5、登录MySQL

# mysql -uroot -p
ALTER USER 'root'@'localhost' IDENTIFIED BY '654321';	-- 密码简单会报错，需要设置
set global validate_password_policy=0;
set global validate_password_length=1;
ALTER USER 'root'@'localhost' IDENTIFIED BY '654321';

6、Yum Repository,以后每次 yum 操作都会自动更新，需要把这个卸载掉

yum -y remove mysql57-community-release-el7-10.noarch

7、开放远程连接

#任何主机
mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '654321' WITH GRANT OPTION;

#指定主机
mysql>GRANT ALL PRIVILEGES ON *.* TO 'jack'@’10.10.50.127’ IDENTIFIED BY '654321' WITH GRANT OPTION;

# 然后刷新权限
mysql>flush privileges;

8、修改mysql数据库总的user表使相的用户能从某一主机登录

mysql>use mysql;
mysql>update user set host = '%' where user = 'root';
mysql>select host, user from user;

9、字符集设置

vim /etc/my.cnf

配置

[client]
port=3306
socket=/var/lib/mysql/mysql.sock
default-character-set=utf8

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
character-set-server=utf8

[mysql]
no-auto-rehash
default-character-set=utf8

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

10、重启服务

systemctl restart mysqld.service

11、检验字符集

show variables like 'character_set%';

12、开机启动

vim /etc/rc.local
systemctl start mysqld.service