部署mysql集群基础环境

设置slave2为master1从：部署集群基础环境

1.1 问题

本案例要求为MySQL集群准备基础环境，完成以下任务操作：

• 数据库授权
• 部署MySQL双主多从结构
• 配置本机hosts解析记录

1.2 方案

使用4台RHEL 6虚拟机，如图-1所示。其中192.168.4.10、192.168.4.11作为MySQL双主服务器，192.168.4.12、192.168.4.13作为主服务器的从服务器。

图－1

1.3 步骤

实现此案例需要按照如下步骤进行。

步骤一：准备环境

1. [[email protected] ~]# cat /etc/hosts
2. 127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
3. ::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
4. 192.168.4.10     master1         master1.tarena.com
5. 192.168.4.11     master2         master2.tarena.com
6. 192.168.4.12     slave1            slave1.tarena.com
7. 192.168.4.13     slave2            slave2.tarena.com
8. 192.168.4.100   master1         master1.tarena.com

1. [[email protected] ~]# ping -c 2 master1
2. PING master1 (192.168.4.10) 56(84) bytes of data.
3. 64 bytes from master1 (192.168.4.10): icmp_seq=1 ttl=64 time=0.378 ms

步骤二：部署数据库主机

1）安装启动数据库（4台数据库主机master1，master2，slave1，slave2执行以下操作）

1. [[email protected] ~]# tar xvf MySQL-5.6.15-1.el6.x86_64.rpm-bundle.tar    //解压软件包
2. .. ..
3. [[email protected] ~]# rpm -Uvh MySQL-*.rpm                                //安装MySQL
4. .. ..
5. [[email protected] ~]# service mysql start

2）初始化配置数据库（4台数据库主机master1，master2，slave1，slave2执行以下操作）

1. [[email protected] ~]# cat /root/.mysql_secret         //查看随机生成密码
2. # The random password set for the root user at Thu May  7 22:15:47 2015 (local time): wW1BNAjD
3. [[email protected] ~]# mysql -uroot -pwW1BNAjD        //使用随机生成密码登陆

1. mysql> set password=password("pwd123");          //修改数据库root密码

步骤三：部署双主多从结构

1）数据库授权（4台数据库主机master1，master2，slave1，slave2执行以下操作）

部署主从同步只需要授权一个主从同步用户即可，但是我们要部署MySQL-MMM架构，所以在这里我们将MySQL-MMM所需用户一并进行授权设置。再授权一个测试用户，在架构搭建完成时测试使用。

1. [[email protected] ~]# mysql -uroot -ppwd123

数据库授权部分为了方便试验我们直接允许所有地址访问了，真实环境需谨慎

1. mysql> grant   replication  slave  on  *.*  to  [email protected]"%" identified by  "pwd123";                                //主从同步授权

1. mysql> grant  replication  client  on *.*  to  [email protected]"%" identified by "monitor";                                         //MMM所需架构用户授权

1. mysql> grant  replication client,process,super   on *.*  to  [email protected]"%" identified by "agent";                                 //MMM所需架构用户授权

1. mysql> grant  all  on *.*  to  [email protected]"%" identified by "pwd123";  //测试用户授权

2）开启主数据库binlog日志、设置server_id（master1，master2）

master1设置：

1. [[email protected] ~]# cat /etc/my.cnf
2. [mysqld]
3. datadir=/var/lib/mysql
4. socket=/var/lib/mysql/mysql.sock
5. user=mysql
6. server_id=10                        //设置server_id,该值集群中不可以重复
7. log-bin                            //开启bin-log日志
8. # Disabling symbolic-links is recommended to prevent assorted security risks
9. symbolic-links=0
10. [mysqld_safe]
11. log-error=/var/log/mysqld.log
12. pid-file=/var/run/mysqld/mysqld.pid
13. [[email protected] ~]# service mysql restart                //重启MySQL服务
14. [[email protected] ~]# ls /var/lib/mysql/master1-bin*        //查看binlog日志是否生成

    master2设置：

15. [[email protected] ~]# cat /etc/my.cnf
16. [mysqld]
17. datadir=/var/lib/mysql
18. socket=/var/lib/mysql/mysql.sock
19. user=mysql
20. server_id=11
21. log-bin
22. # Disabling symbolic-links is recommended to prevent assorted security risks
23. symbolic-links=0
24. [mysqld_safe]
25. log-error=/var/log/mysqld.log
26. pid-file=/var/run/mysqld/mysqld.pid
27. [[email protected] ~]# service mysql restart
28. [[email protected] ~]# ls /var/lib/mysql/master2-bin.*

    3）从库设置server_id

    slave1设置：

1. 1. [[email protected] ~]# cat /etc/my.cnf
   2. [mysqld]
   3. datadir=/var/lib/mysql
   4. socket=/var/lib/mysql/mysql.sock
   5. user=mysql
   6. server_id=12
   7. # Disabling symbolic-links is recommended to prevent assorted security risks
   8. symbolic-links=0
   9. [mysqld_safe]
   10. log-error=/var/log/mysqld.log
   11. pid-file=/var/run/mysqld/mysqld.pid
   12. [[email protected] ~]# service mysql restart

slave2设置：

1. [[email protected] ~]# cat /etc/my.cnf

2. [mysqld]
3. datadir=/var/lib/mysql
4. socket=/var/lib/mysql/mysql.sock
5. user=mysql
6. server_id=13
7. # Disabling symbolic-links is recommended to prevent assorted security risks
8. symbolic-links=0
9. [mysqld_safe]
10. log-error=/var/log/mysqld.log
11. pid-file=/var/run/mysqld/mysqld.pid
12. [[email protected] ~]# service mysql restart

4）配置主从从从关系

配置master2、slave1、slave2成为master1的从服务器

查看master1服务器binlong日志使用节点信息：

1. [[email protected] ~]# mysql -uroot -ppwd123
2. .. ..
3. mysql> show master status\G
4. File: master1-bin.000001
5. Position: 120
6. 设置master2为master1从：
7. [[email protected] ~]# mysql -uroot -ppwd123
8. .. ..
9. mysql> change  master  to                         //设置主服务器信息
10. -> master_host="192.168.4.10",                //设置主服务器IP地址
11. -> master_user="slaveuser",                //设置主从同步用户
12. -> master_password="pwd123",                //设置主从同步密码
13. -> master_log_file="master1-bin.000001",    //设置主库binlog日志名称
14. -> master_log_pos=120;                        //设置主从binlog日志使用节点
    1. mysql> start slave;                            //启动同步进程
    2. mysql> show slave status\G                        //查看主从是否成功

启动同步进程后查看IO节点和SQL节点是否为Yes如果均为Yes表示主从正常。Slave_IO_Running: Yes                //IO节点正常Slave_SQL_Running: Yes                //SQL节点正常.. .设置slave1为master1从：[[email protected] ~]# mysql -uroot -ppwd123mysql> change  master  to-> master_host="192.168.4.10",-> master_user="slaveuser",-> master_password="pwd123",-> master_log_file="master1-bin.000001",-> master_log_pos=120;

1. mysql> start slave;

2. mysql> show slave status\G
3. Slave_IO_Running: Yes                //IO节点正常
4. Slave_SQL_Running: Yes                //SQL节点正常\

   设置slave2为master1从：

[[email protected] ~]# mysql -uroot -ppwd123mysql> change  master  to-> master_host="192.168.4.10",-> master_user="slaveuser",-> master_password="pwd123",-> master_log_file="master1-bin.000001",-> master_log_pos=120;mysql> start slave;mysql> show slave status\GSlave_IO_Running: Yes                //IO节点正常Slave_SQL_Running: Yes                //SQL节点正常5）配置主主从从关系，将master1配置为master2的从

查看master2的binlog使用信息：

1. [[email protected] ~]# mysql -uroot -ppwd123
2. mysql> show master status\G
3. File: master2-bin.000001
4. Position: 120

设置master1成为master2的从：

1. [[email protected] ~]# mysql -uroot -ppwd123

2. mysql> change  master  to
3. -> master_host="192.168.4.11",
4. -> master_user="slaveuser",
5. -> master_password="pwd123",
6. -> master_log_file="master2-bin.000001",
7. -> master_log_pos=120;
8. mysql> start slave;
9. mysql> show slave status\G
10. .. ..
11. Slave_IO_Running: Yes                //IO节点正常
12. Slave_SQL_Running: Yes                //SQL节点正常
13. 6）测试主从架构是否成功
14. master1更新数据，查看其它主机是否同步：