CentOS7x64 yum下安装MySQL5.7安装

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原文链接http://www.jb51.cc/article/p-qzrplfnn-xp.html

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
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.*"
[root@localhost home]# yum repolist enabled | grep "MysqL.*-community.*"
MysqL-connectors-community/x86_64 MysqL Connectors Community 3
MysqL-tools-community/x86_64 MysqL Tools Community 4
MysqL57-community/x86_64 MysqL 5.7 Community Server 18


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

[root@localhost home]# systemctl status MysqLd
MysqLd.service - MysqL Server
 Loaded: loaded (/usr/lib/systemd/system/MysqLd.service; enabled)
 Active: active (running) since 一 2017-06-26 21:23:21 EDT; 14s ago
 Docs: man:MysqLd(8)
 http://dev.MysqL.com/doc/refman/en/using-systemd.html
 Process: 21186 ExecStart=/usr/sbin/MysqLd --daemonize --pid-file=/var/run/MysqLd/MysqLd.pid $MysqLD_OPTS (code=exited,status=0/SUCCESS)
 Process: 21108 ExecStartPre=/usr/bin/MysqLd_pre_systemd (code=exited,status=0/SUCCESS)
Main PID: 21190 (MysqLd)
 CGroup: /system.slice/MysqLd.service
 └─21190 /usr/sbin/MysqLd --daemonize --pid-file=/var/run/MysqLd/my...

6月 26 21:23:21 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



或者

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:

set password for 'root'@'localhost'=password('208170'); 
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements


通过msyql环境变量可以查看密码策略的相关信息:

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 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 ( zhe ge di fang you dian wen ti bu yao cao zuo)

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

如果不需要密码策略,添加my.cnf文件添加如下配置禁用即可:

重新启动MysqL服务使配置生效:


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:


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:

重新启动MysqL服务,查看数据库默认编码如下所示:
MysqL> show variables like '%character%';
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/MysqL/charsets/ |
+--------------------------+----------------------------+

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
shell> grep 'temporary password' /var/log/MysqLd.log [root@localhost home]# grep 'temporary password' /var/log/MysqLd.log 2017-06-27T01:23:00.805572Z 1 [Note] A temporary password is generated for root@localhost: tZ%*dP??j26h [root@localhost home]# MysqL -uroot -ptZ%*dP??j26h MysqL> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPasswd!';MysqL> set password for 'root'@'localhost'=password('208170');MysqL> show variables like '%password%';# 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=0validate_password = offsystemctl restart MysqLdMysqL> GRANT ALL PRIVILEGES ON *.* TO 'lhbing'@'%' IDENTIFIED BY '208170' WITH GRANT OPTION;[MysqLd] character_set_server=utf8 init_connect='SET NAMES utf8'

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