CentOs7.3 安装 MysqL 5.7.19 二进制版本

参考官网 - 使用通用二进制文件在Unix / Linux上安装MySQL

MySQL社区版 下载地址

采用二进制方式免编译安装MysqL,适合各类MysqL产品系列,不需要复杂的编译设置和编译时间等待,直接解压下载的软件包,初始化即可完成MysqL的安装和启动.

1.准备工作

依赖环境

关闭防火墙

$ systemctl stop firewalld.service

MysqL依赖于libaio 库

$ yum search libaio
$ yum install libaio

下载，解压，重命名

通常解压在 /usr/local/MysqL

把MysqL-5.7.19-linux-glibc2.12-x86_64 文件夹，重命名成MysqL,这样就凑成/usr/local/MysqL目录了

$ cd /opt/
$ wget https://dev.MysqL.com/get/Downloads/MysqL-5.7/MysqL-5.7.19-linux-glibc2.12-x86_64.tar.gz
$ tar -zxvf /opt/MysqL-5.7.19-linux-glibc2.12-x86_64.tar.gz -C /usr/local/
$ mv /usr/local/MysqL-5.7.19-linux-glibc2.12-x86_64/ /usr/local/MysqL

解压目录内容

bin MysqLd服务器，客户端和实用程序
data 日志文件，数据库
docs MysqL手册信息格式
man Unix手册页
include 包含（标题）文件
lib 库
share 其他支持文件，包括错误消息，示例配置文件，用于数据库安装的sql

2.安装MysqL

1. 新建用户组和用户

$ cd /usr/local/MysqL/ 
$ groupadd MysqL
$ useradd MysqL -g MysqL

2. 创建目录并授权

$ mkdir data MysqL-files
$ chmod 750 MysqL-files
$ chown -R MysqL .
$ chgrp -R MysqL .

3. 初始化MysqL

$ bin/MysqLd --initialize --user=MysqL # MysqL 5.7.6 and up

注意密码

4. MysqL 临时密码

[注意]root@localhost生成临时密码：;b;s;)/rn6A3,也就是root@localhost:后的字符串

2017-08-26T03:23:35.368366Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-08-26T03:23:35.748679Z 0 [Warning] InnoDB: New log files created,LSN=45790
2017-08-26T03:23:35.793190Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2017-08-26T03:23:35.848286Z 0 [Warning] No existing UUID has been found,so we assume that this is the first time that this server has been started. Generating a new UUID: f210c54b-8a0d-11e7-abbd-000c29129bb0.
2017-08-26T03:23:35.848889Z 0 [Warning] Gtid table is not ready to be used. Table 'MysqL.gtid_executed' cannot be opened.
2017-08-26T03:23:35.849421Z 1 [Note] A temporary password is generated for root@localhost: ;b;s;)/rn6A3

5. 生成RSA私钥，可以跳过此步骤

MysqL_ssl_rsa_setup需要openssl支持，用于启用数据量ssl连接，需要进一步配置。

参考-MySQL 使用 SSL 连接

$ bin/MysqL_ssl_rsa_setup

6. 授予读写权限

$ chown -R root .
$ chown -R MysqL data MysqL-files

7. 添加到MysqL 启动脚本到系统服务

$ cp support-files/MysqL.server /etc/init.d/MysqL.server

3.启动MysqL服务

启动脚本有两个分别是：

/usr/local/MysqL/bin/MysqLd_safe
/usr/local/MysqL/support-files/MysqL.server（即/etc/init.d/MysqLd）

当启动MysqLd时，MysqLd_safe同时启动

MysqLd_safe监控MysqLd服务,记录错误日志，并在MysqLd因故障停止时将其重启

启动方式一

$ bin/MysqLd_safe --user=MysqL &

启动方式二

$ service MysqL.server start

或者

/usr/local/MysqL/support-files/MysqL.server start

如若出现报错

Starting MysqL.2017-08-26T07:31:24.312411Z MysqLd_safe error: log-error set to '/var/log/mariadb/mariadb.log',however file don't exists. Create writable for user 'MysqL'.
 ERROR! The server quit without updating PID file (/var/lib/MysqL/node1.pid).

给日志目录授予读写权限

$ mkdir /var/log/mariadb
$ touch /var/log/mariadb/mariadb.log
$ chown -R MysqL:MysqL /var/log/mariadb

4.登录MysqL

$ /usr/local/MysqL/bin/MysqL -uroot -p
Enter password:

如果不知道密码
密码在，安装MysqL步骤 4 ，有提到，怎么找初始化临时密码

如若出现报错

Enter password: 
ERROR 2002 (HY000): Can't connect to local MysqL server through socket '/tmp/MysqL.sock' (2)

故障分析

查看MysqL实例的状态

$ netstat -ntlp  | grep 3306
tcp6       0      0 :::3306                 :::*                    LISTEN      10794/MysqLd

查看my.cnf关于socket的配置

$ more /etc/my.cnf |grep sock
socket=/var/lib/MysqL/MysqL.sock

解决方法,修改/etc/my.cnf

$ vi /etc/my.cnf

修改 [MysqLd]组下的 socket 路径，我是选择注释掉，加一行为tmp/MysqL.soc

[MysqLd]
datadir=/var/lib/MysqL
#socket=/var/lib/MysqL/MysqL.sock
socket=/tmp/MysqL.sock

重启MysqL 服务

$ service MysqL.server start
Shutting down MysqL.. SUCCESS!

再次登录

$ /usr/local/MysqL/bin/MysqL -uroot -p

如果不知道密码
密码在，安装MysqL步骤 4 ，有提到，怎么找初始化临时密码

设置MysqL密码

登陆成功后，设置MysqL密码

MysqL> ALTER USER   'root'@'localhost' identified by 'mima';

或者

MysqL> set password=password("mima");

刷新权限

MysqL> flush privileges;
MysqL> exit;

查看MysqL.user表中存在哪些帐户 以及它们的密码是否为空：

MysqL 5.7.6起，使用这个语句：

MysqL> SELECT User,Host,HEX(authentication_string) FROM MysqL.user;
+---------------+-----------+------------------------------------------------------------------------------------+
| User          | Host      | HEX(authentication_string)                                                         |
+---------------+-----------+------------------------------------------------------------------------------------+
| root          | localhost | 2A39383730334637413534333934344644333831383037373636394637344436303631364442324338 |
| MysqL.session | localhost | 2A5448495349534E4F544156414C494450415353574F52445448415443414E42455553454448455245 |
| MysqL.sys     | localhost | 2A5448495349534E4F544156414C494450415353574F52445448415443414E42455553454448455245 |
+---------------+-----------+------------------------------------------------------------------------------------+

开启远程登录

关闭防火墙

$ systemctl stop firewalld.service

以权限用户root登录

$ /usr/local/MysqL/bin/MysqL -uroot -p

MysqL> use MysqL;
MysqL> update user set host = '%' where user ='root';
MysqL> flush privileges;

第1行：选择MysqL库
第2行：修改host值（以通配符%的内容增加主机/IP地址），当然也可以直接增加IP地址
第3行：刷新MysqL的系统权限相关表

或者

MysqL> grant all privileges on *.*  to  'root'@'%'  identified by 'mima'  with grant option;
MysqL> flush privileges;

• 作者：Peng Lei

• 出处：Segment Fault PengLei `Blog 专栏

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