【MySQL】MySQL多实例环境安装

一 软件环境

使用的软件分别为：

• VirtualBox 5.2
• MySQL 5.7.25

二 版本选择

版本选择策略为：

• 官方社区版
• 小版本20以上的版本

三 软件安装

1 删除之前版本

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

[root@strong ~]# rpm -qa | grep mariadb

[root@strong ~]# yum remove mysql-server-5.1.71-1.el6.x86_64

[root@strong ~]# find / -name *mysql*

2 创建用户和组

[root@strong ~]# groupadd mysql

[root@strong ~]# useradd -r -g mysql -s /bin/false mysql

3 解压安装文件

[root@strong ~]# tar xvf /tmp/mysql-5.7.25-linux-glibc2.12-x86_64.tar

[root@strong ~]# tar zxvf mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz

[root@strong ~]# mv mysql-5.7.25-linux-glibc2.12-x86_64 mysql

[root@strong ~]# mv mysql /usr/local/

[root@strong ~]# cd /usr/local/

[root@strong local]# chown -R mysql.mysql mysql/

4 创建数据库目录

[root@strong ~]# mkdir -p /u01/data/mydb3306/

[root@strong ~]# mkdir -p /u01/data/mydb3307/

[root@strong ~]# chown -R mysql.mysql /u01/data/mydb3306/

[root@strong ~]# chown -R mysql.mysql /u01/data/mydb3307/

5 修改配置文件

[root@strong ~]# vim /etc/my.cnf

[mysqld_multi]

mysqld=/usr/local/mysql/bin/mysqld_safe

mysqladmin=/usr/local/mysql/bin/mysqladmin

[mysqld3306]

basedir=/usr/local/mysql

datadir=/u01/data/mydb3306

port=3306

server_id=1

socket=/u01/data/mydb3306/mysql3306.sock

[mysqld3307]

basedir=/usr/local/mysql

datadir=/u01/data/mydb3307

port=3307

server_id=2

socket=/u01/data/mydb3307/mysql3307.sock

6 修改初始化参数文件

[root@strong ~]# vim .bash_profile

export PATH=$PATH:/usr/local/mysql/bin

[root@strong ~]# . .bash_profile

7 初始化数据库

[root@strong ~]# /usr/local/mysql/bin/mysqld --initialize --user=mysql --datadir=/u01/data/mydb3306

2019-04-14T12:46:51.822684Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).

2019-04-14T12:46:52.774895Z 0 [Warning] InnoDB: New log files created, LSN=45790

2019-04-14T12:46:52.995154Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.

2019-04-14T12:46:53.242182Z 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: 6114ce01-5eb3-11e9-8270-0800273a9619.

2019-04-14T12:46:53.316235Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.

2019-04-14T12:46:53.330096Z 1 [Note] A temporary password is generated for root@localhost: 0Y/tE)27c5gU

[root@strong ~]# /usr/local/mysql/bin/mysqld --initialize --user=mysql --datadir=/u01/data/mydb3307

2019-04-14T12:47:32.629460Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).

2019-04-14T12:47:33.235757Z 0 [Warning] InnoDB: New log files created, LSN=45790

2019-04-14T12:47:33.442469Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.

2019-04-14T12:47:33.588142Z 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: 79210c2e-5eb3-11e9-836e-0800273a9619.

2019-04-14T12:47:33.655020Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.

2019-04-14T12:47:33.656809Z 1 [Note] A temporary password is generated for root@localhost: 4bAtee4OEf;g

8 查看数据库状态

[root@strong ~]# mysqld_multi report

Reporting MySQL servers

MySQL server from group: mysqld3306 is not running

MySQL server from group: mysqld3307 is not running

9 启动数据库

[root@strong ~]# mysqld_multi start 3306,3307

10 查看数据库是否正常启动

[root@strong ~]# mysqld_multi report

Reporting MySQL servers

MySQL server from group: mysqld3306 is running

MySQL server from group: mysqld3307 is running

[root@strong ~]# netstat -ntlp | grep mysql

tcp 0 0 :::3307 :::* LISTEN 2080/mysqld

tcp 0 0 :::3306 :::* LISTEN 2079/mysqld

[root@strong ~]# ps -ef | grep mysql

[root@strong ~]#

[root@strong ~]# ll /u01/data/mydb3306/mysql3306.sock

srwxrwxrwx. 1 mysql mysql 0 Apr 14 20:49 /u01/data/mydb3306/mysql3306.sock

[root@strong ~]# ll /u01/data/mydb3307/mysql3307.sock

srwxrwxrwx. 1 mysql mysql 0 Apr 14 20:49 /u01/data/mydb3307/mysql3307.sock

11 修改Root密码

[root@strong ~]# mysql -uroot -p'0Y/tE)27c5gU' -P 3306 -S /u01/data/mydb3306/mysql3306.sock

mysql> set password=password('mysql');

Query OK, 0 rows affected, 1 warning (0.00 sec)

[root@strong ~]# mysql -uroot -p'4bAtee4OEf;g' -P 3307 -S /u01/data/mydb3307/mysql3307.sock

mysql> set password=password('mysql');

12 关闭数据库

[root@strong ~]# mysqladmin -uroot -pmysql -P 3306 -S /u01/data/mydb3306/mysql3306.sock shutdown

[root@strong ~]# mysqladmin -uroot -pmysql -P 3307 -S /u01/data/mydb3307/mysql3307.sock shutdown

至此，整个MySQL多实例环境安装完成。