centos 安装配置 mysql

安装环境:CentOS7 64位 MINI版,安装MySQL5.7

1、配置YUM源

MySQL官网中下载YUM源rpm安装包:http://dev.mysql.com/downloads/repo/yum/ 

# 下载mysql源安装包
shell> wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
# 安装mysql源
shell> yum localinstall mysql57-community-release-el7-8.noarch.rpm

检查mysql源是否安装成功

shell> yum repolist enabled | grep "mysql.*-community.*"

 
看到上图所示表示安装成功

2、安装MySQL

shell> yum install mysql-community-server

3、启动MySQL服务

shell> systemctl start mysqld

查看MySQL的启动状态

shell> systemctl status mysqld
● mysqld.service - MySQL Server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; disabled; vendor preset: disabled)
   Active: active (running) since 五 2016-06-24 04:37:37 CST; 35min ago
 Main PID: 2888 (mysqld)
   CGroup: /system.slice/mysqld.service
           └─2888 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid

6月 24 04:37:36 localhost.localdomain systemd[1]: Starting MySQL Server...
6月 24 04:37:37 localhost.localdomain systemd[1]: Started MySQL Server.

4、开机启动

shell> systemctl enable mysqld
shell> systemctl daemon-reload

5、修改root默认密码

mysql安装完成之后,在/var/log/mysqld.log文件中给root生成了一个默认密码。通过下面的方式找到root默认密码,然后登录mysql进行修改:

shell> grep 'temporary password' /var/log/mysqld.log

shell> mysql -uroot -p
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!'; 

或者

mysql> set password for 'root'@'localhost'=password('MyNewPass4!'); 

注意:mysql5.7默认安装了密码安全检查插件(validate_password),默认密码检查策略要求密码必须包含:大小写字母、数字和特殊符号,并且长度不能少于8位。否则会提示ERROR 1819 (HY000): Your password does not satisfy the current policy requirements错误,如下图所示: 

通过msyql环境变量可以查看密码策略的相关信息:

mysql> show variables like '%password%';



  validate_password_policy:密码策略,默认为MEDIUM策略  validate_password_dictionary_file:密码策略文件,策略为STRONG才需要  validate_password_length:密码最少长度  validate_password_mixed_case_count:大小写字符长度,至少1个  validate_password_number_count :数字至少1个  validate_password_special_char_count:特殊字符至少1个  上述参数是默认策略MEDIUM的密码检查规则。

共有以下几种密码策略:

策略检查规则
0 or LOW Length
1 or MEDIUM Length; numeric, lowercase/uppercase, and special characters
2 or STRONG Length; numeric, lowercase/uppercase, and special characters; dictionary file

MySQL官网密码策略详细说明:http://dev.mysql.com/doc/refman/5.7/en/validate-password-options-variables.html#sysvar_validate_password_policy

修改密码策略

在/etc/my.cnf文件添加validate_password_policy配置,指定密码策略

# 选择0(LOW),1(MEDIUM),2(STRONG)其中一种,选择2需要提供密码字典文件
validate_password_policy=0

如果不需要密码策略,添加my.cnf文件中添加如下配置禁用即可:

validate_password = off

重新启动mysql服务使配置生效:

systemctl restart mysqld

6、添加远程登录用户

默认只允许root帐户在本地登录,如果要在其它机器上连接mysql,必须修改root允许远程连接,或者添加一个允许远程连接的帐户,为了安全起见,我添加一个新的帐户:

mysql> GRANT ALL PRIVILEGES ON *.* TO 'yangxin'@'%' IDENTIFIED BY 'Yangxin0917!' WITH GRANT OPTION;

7、配置默认编码为utf8

修改/etc/my.cnf配置文件,在[mysqld]下添加编码配置,如下所示:

[mysqld]
character_set_server=utf8
init_connect='SET NAMES utf8'

重新启动mysql服务,查看数据库默认编码如下所示:


默认配置文件路径:  配置文件:/etc/my.cnf  日志文件:/var/log//var/log/mysqld.log  服务启动脚本:/usr/lib/systemd/system/mysqld.service  socket文件:/var/run/mysqld/mysqld.pid

posted @ 2017-04-18 22:41  CoderQiang  阅读(170)  评论(0编辑  收藏  举报