《综合》MMM集群

《综合》MMM集群
《综合》MMM集群
1 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. [root@master1 ~]# 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
10. [root@master1 ~]# ping -c 2 master1
11. PING master1 (192.168.4.10) 56(84) bytes of data.
12. 64 bytes from master1 (192.168.4.10): icmp_seq=1 ttl=64 time=0.378 ms
13. 64 bytes from master1 (192.168.4.10): icmp_seq=2 ttl=64 time=0.396 ms
15. --- master1 ping statistics ---
16. 2 packets transmitted, 2 received, 0% packet loss, time 1001ms
17. rtt min/avg/max/mdev = 0.378/0.387/0.396/0.009 ms
18. [root@master1 ~]#
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. [root@master1 ~]# tar xvf MySQL-5.6.15-1.el6.x86_64.rpm-bundle.tar //解压软件包
2. .. ..
3. [root@master1 ~]# rpm -Uvh MySQL-*.rpm //安装MySQL
4. .. ..
5. [root@master1 ~]# service mysql start
6. Starting MySQL. [确定]
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. [root@master1 ~]# 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
4. [root@master1 ~]# mysql -uroot -pwW1BNAjD //使用随机生成密码登陆
5. Warning: Using a password on the command line interface can be insecure.
6. Welcome to the MySQL monitor. Commands end with ; or g.
7. Your MySQL connection id is 1
8. Server version: 5.6.15
10. Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
12. Oracle is a registered trademark of Oracle Corporation and/or its
13. affiliates. Other names may be trademarks of their respective
14. owners.
16. Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
18. mysql> set password=password("pwd123"); //修改数据库root密码
19. Query OK, 0 rows affected (0.49 sec)
21. mysql> exit
22. Bye
23. [root@master1 ~]#
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. [root@master1 ~]# mysql -uroot -ppwd123
2. Warning: Using a password on the command line interface can be insecure.
3. Welcome to the MySQL monitor. Commands end with ; or g.
4. Your MySQL connection id is 2
5. Server version: 5.6.15 MySQL Community Server (GPL)
7. Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
9. Oracle is a registered trademark of Oracle Corporation and/or its
10. affiliates. Other names may be trademarks of their respective
11. owners.
13. Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
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 slaveuser@"%" identified by "pwd123"; //主从同步授权
2. Query OK, 0 rows affected (0.00 sec)
4. mysql> grant replication client on *.* to monitor@"%" identified by "monitor"; //MMM所需架构用户授权
5. Query OK, 0 rows affected (0.06 sec)
7. mysql> grant replication client,process,super on *.* to agent@"%" identified by "agent"; //MMM所需架构用户授权
8. Query OK, 0 rows affected (0.00 sec)
10. mysql> grant all on *.* to root@"%" identified by "pwd123"; //测试用户授权
11. Query OK, 0 rows affected (0.00 sec)
13. mysql>
2）开启主数据库binlog日志、设置server_id（master1，master2）

master1设置：
1. [root@master1 ~]# 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
11. [mysqld_safe]
12. log-error=/var/log/mysqld.log
13. pid-file=/var/run/mysqld/mysqld.pid
15. [root@master1 ~]# service mysql restart //重启MySQL服务
16. Shutting down MySQL.. [确定]
17. Starting MySQL.. [确定]
18. [root@master1 ~]# ls /var/lib/mysql/master1-bin* //查看binlog日志是否生成
19. /var/lib/mysql/master1-bin.000001 /var/lib/mysql/master1-bin.index
20. [root@master1 ~]#
master2设置：
1. [root@master2 ~]# cat /etc/my.cnf
2. [mysqld]
3. datadir=/var/lib/mysql
4. socket=/var/lib/mysql/mysql.sock
5. user=mysql
6. server_id=11
7. log-bin
8. # Disabling symbolic-links is recommended to prevent assorted security risks
9. symbolic-links=0
11. [mysqld_safe]
12. log-error=/var/log/mysqld.log
13. pid-file=/var/run/mysqld/mysqld.pid
14. [root@master2 ~]# service mysql restart
15. Shutting down MySQL.. [确定]
16. Starting MySQL. [确定]
17. [root@master2 ~]# ls /var/lib/mysql/master2-bin.*
18. /var/lib/mysql/master2-bin.000001 /var/lib/mysql/master2-bin.index
3）从库设置server_id

slave1设置：
1. [root@slave1 ~]# 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
10. [mysqld_safe]
11. log-error=/var/log/mysqld.log
12. pid-file=/var/run/mysqld/mysqld.pid
13. [root@slave1 ~]# service mysql restart
14. Shutting down MySQL.. [确定]
15. Starting MySQL.. [确定]
16. [root@slave1 ~]#
slave2设置：
1. [root@slave2 ~]# 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
10. [mysqld_safe]
11. log-error=/var/log/mysqld.log
12. pid-file=/var/run/mysqld/mysqld.pid
13. [root@slave2 ~]# service mysql restart
14. Shutting down MySQL.. [确定]
15. Starting MySQL. [确定]
16. [root@slave2 ~]#
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. [root@master1 ~]# mysql -uroot -ppwd123
2. .. ..
3. mysql> show master statusG
4. *************************** 1. row ***************************
5. File: master1-bin.000001
6. Position: 120
7. Binlog_Do_DB:
8. Binlog_Ignore_DB:
9. Executed_Gtid_Set:
10. 1 row in set (0.00 sec)
12. mysql>
设置master2为master1从：
1. [root@master2 ~]# mysql -uroot -ppwd123
2. .. ..
3. mysql> change master to //设置主服务器信息
4. -> master_host="192.168.4.10", //设置主服务器IP地址
5. -> master_user="slaveuser", //设置主从同步用户
6. -> master_password="pwd123", //设置主从同步密码
7. -> master_log_file="master1-bin.000001", //设置主库binlog日志名称
8. -> master_log_pos=120; //设置主从binlog日志使用节点
9. Query OK, 0 rows affected, 2 warnings (0.06 sec)
11. mysql> start slave; //启动同步进程
12. Query OK, 0 rows affected (0.00 sec)
14. mysql> show slave statusG //查看主从是否成功
15. .. ..
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。
1. Slave_IO_Running: Yes //IO节点正常
2. Slave_SQL_Running: Yes //SQL节点正常
3. .. ..
4. mysql>
设置slave1为master1从：
1. [root@slave1 ~]# mysql -uroot -ppwd123
2. .. ..
3. mysql> change master to
4. -> master_host="192.168.4.10",
5. -> master_user="slaveuser",
6. -> master_password="pwd123",
7. -> master_log_file="master1-bin.000001",
8. -> master_log_pos=120;
9. Query OK, 0 rows affected, 2 warnings (0.12 sec)
11. mysql> start slave;
12. Query OK, 0 rows affected (0.16 sec)
14. mysql> show slave statusG
15. .. ..
16. Slave_IO_Running: Yes //IO节点正常
17. Slave_SQL_Running: Yes //SQL节点正常
18. .. ..
19. mysql>
设置slave2为master1从：
1. [root@slave2 ~]# mysql -uroot -ppwd123
2. .. ..
3. mysql> change master to
4. -> master_host="192.168.4.10",
5. -> master_user="slaveuser",
6. -> master_password="pwd123",
7. -> master_log_file="master1-bin.000001",
8. -> master_log_pos=120;
9. Query OK, 0 rows affected, 2 warnings (0.13 sec)
11. mysql> start slave;
12. Query OK, 0 rows affected (0.27 sec)
14. mysql> show slave statusG
15. .. ..
16. Slave_IO_Running: Yes //IO节点正常
17. Slave_SQL_Running: Yes //SQL节点正常
18. .. ..
19. mysql>
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. [root@master2 ~]# mysql -uroot -ppwd123
2. .. ..
3. mysql> show master statusG
4. *************************** 1. row ***************************
5. File: master2-bin.000001
6. Position: 120
7. Binlog_Do_DB:
8. Binlog_Ignore_DB:
9. Executed_Gtid_Set:
10. 1 row in set (0.00 sec)
12. mysql>
设置master1成为master2的从：
1. [root@master1 ~]# mysql -uroot -ppwd123
2. .. ..
3. mysql> change master to
4. -> master_host="192.168.4.11",
5. -> master_user="slaveuser",
6. -> master_password="pwd123",
7. -> master_log_file="master2-bin.000001",
8. -> master_log_pos=120;
9. Query OK, 0 rows affected, 2 warnings (0.31 sec)
11. mysql> start slave;
12. Query OK, 0 rows affected (0.27 sec)
14. mysql> show slave statusG
15. .. ..
16. Slave_IO_Running: Yes //IO节点正常
17. Slave_SQL_Running: Yes //SQL节点正常
18. .. ..
19. mysql>
6）测试主从架构是否成功

master1更新数据，查看其它主机是否同步：
1. [root@master1 ~]# mysql -uroot -ppwd123
2. .. ..
3. mysql> show databases;
4. +--------------------+
5. | Database |
6. +--------------------+
7. | information_schema |
8. | mysql |
9. | performance_schema |
10. | test |
11. +--------------------+
12. 4 rows in set (0.00 sec)
14. mysql> create database tarena;
15. Query OK, 1 row affected (0.06 sec)
17. mysql> show databases;
18. +--------------------+
19. | Database |
20. +--------------------+
21. | information_schema |
22. | mysql |
23. | performance_schema |
24. | tarena |
25. | test |
26. +--------------------+
27. 5 rows in set (0.00 sec)
29. mysql>
master2主机查看：
1. [root@master2 ~]# mysql -uroot -ppwd123 -e "show databases"
2. Warning: Using a password on the command line interface can be insecure.
3. +--------------------+
4. | Database |
5. +--------------------+
6. | information_schema |
7. | mysql |
8. | performance_schema |
9. | tarena |
10. | test |
11. +--------------------+
12. [root@master2 ~]#
slave1主机查看：
1. [root@slave1 ~]# mysql -uroot -ppwd123 -e "show databases"
2. Warning: Using a password on the command line interface can be insecure.
3. +--------------------+
4. | Database |
5. +--------------------+
6. | information_schema |
7. | mysql |
8. | performance_schema |
9. | tarena |
10. | test |
11. +--------------------+
12. [root@slave1 ~]#
slave2主机查看：
1. [root@slave2 ~]# mysql -uroot -ppwd123 -e "show databases"
2. Warning: Using a password on the command line interface can be insecure.
3. +--------------------+
4. | Database |
5. +--------------------+
6. | information_schema |
7. | mysql |
8. | performance_schema |
9. | tarena |
10. | test |
11. +--------------------+
12. [root@slave2 ~]#
2 MySQL-MMM架构部署

2.1 问题

本案例要求熟悉实现MySQL-MMM的架构部署，主要包括以下任务：
1. 安装依赖包
2. 安装软件包
3. 配置MySQL-MMM
2.2 方案

使用5台RHEL 6虚拟机，如图-2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，192.168.4.100作为MySQL-MMM架构中管理监控服务器，实现监控MySQL主从服务器的工作状态及决定故障节点的移除或恢复工作，架构搭建完成后使用客户机192.168.4.120进行访问，客户机需要安装MySQL-client软件包。

图-2

2.3 步骤

实现此案例需要按照如下步骤进行。

步骤一：安装MySQL-MMM

1）安装依赖关系（MySQL集群内5台服务器master1，master2，slave1，slave2，monitor）均需安装
1. [root@master1 ~]# yum -y install gcc* perl-Date-Manip perl-Date-Manip perl-Date-Manip perl-XML-DOM-XPath perl-XML-Parser perl-XML-RegExp rrdtool perl-Class-Singleton perl perl-DBD-MySQL perl-Params-Validate perl-MailTools perl-Time-HiRes
2. .. ..
2）安装MySQL-MMM软件依赖包（MySQL集群内5台服务器master1，master2，slave1，slave2，monitor）均需安装，软件包讲师提供

安装安装Log-Log4perl 类
1. [root@mysql-master1 ~]# rpm -ivh perl-Log-Log4perl-1.26-1.el6.rf.noarch.rpm
2. warning: perl-Log-Log4perl-1.26-1.el6.rf.noarch.rpm: Header V3 DSA/SHA1 Signature, key ID 6b8d79e6: NOKEY
3. Preparing... ######################### [100%]
4. 1:perl-Log-Log4perl ######################## [100%]
安装Algorithm-Diff类
1. [root@mysql-master1 ~]# tar -zxvf Algorithm-Diff-1.1902.tar.gz //解压安装包
2. .. ..
3. [root@mysql-master1 ~]# cd Algorithm-Diff-1.1902 //切换到安装目录
4. [root@mysql-master1 Algorithm-Diff-1.1902]# perl Makefile.PL //生成makefile文件
5. Checking if your kit is complete...
6. Looks good
7. Writing Makefile for Algorithm::Diff
9. [root@mysql-master1 Algorithm-Diff-1.1902]# make && make install //编译，编译安装
10. .. ..
11. [root@mysql-master1 Algorithm-Diff-1.1902]# cd //切换到软件包目录
12. [root@mysql-master1 ~]#
安装Proc-Daemon类
1. [root@mysql-master1 ~]# tar -zxvf Proc-Daemon-0.03.tar.gz //解压安装包
2. .. ..
3. [root@mysql-master1 ~]# cd Proc-Daemon-0.03 //切换到安装目录
4. [root@mysql-master1 Proc-Daemon-0.03]# perl Makefile.PL //生成makefile文件
5. Checking if your kit is complete...
6. Looks good
7. Writing Makefile for Proc::Daemon
8. [root@mysql-master1 Proc-Daemon-0.03]# make && make install //编译，编译安装
9. .. ..
10. [root@mysql-master1 Proc-Daemon-0.03]# cd //切换到软件包目录
11. [root@mysql-master1 ~]#
安装Net-ARP虚拟IP分配工具：
1. [root@mysql-master1 ~]# gunzip Net-ARP-1.0.8.tgz //使用gunzip解压tgz格式的安装包
2. [root@mysql-master1 ~]# tar xvf Net-ARP-1.0.8.tar //解压tar安装包
3. .. ..
4. [root@mysql-master1 ~]# cd Net-ARP-1.0.8 //切换到安装目录
5. [root@mysql-master1 Net-ARP-1.0.8]# perl Makefile.PL //生成makefile文件
6. Module Net::Pcap is required for make test!
7. Checking if your kit is complete...
8. Looks good
9. Writing Makefile for Net::ARP
10. [root@mysql-master1 Net-ARP-1.0.8]# make && make install //编译，编译安装
11. .. ..
12. [root@mysql-master1 Net-ARP-1.0.8]# cd //切换到软件包目录
13. [root@mysql-master1 ~]#
安装Mysql-MMM软件包：
1. [root@mysql-master1 ~]# tar xvf mysql-mmm-2.2.1.tar.gz //解压安装包
2. .. ..
3. [root@mysql-master1 ~]# cd mysql-mmm-2.2.1 //切换到安装目录
4. [root@mysql-master1 mysql-mmm-2.2.1]# make && make install //编译，编译安装
5. .. ..
6. [root@mysql-master1 mysql-mmm-2.2.1]#
步骤二：修改配置文件

1）修改公共配置文件

本案例中MySQL集群的5台服务器（master1、master2、slave1、slave2、monitor）都需要配置，可以先配好一台后使用scp复制。
1. [root@master1 ~]# vim /etc/mysql-mmm/mmm_common.conf
2. active_master_role writer
4. <host default>
5. cluster_interface eth0 //设置主从同步的用户
7. pid_path /var/run/mmm_agentd.pid
8. bin_path /usr/lib/mysql-mmm/
10. replication_user slaveuser //设置主从同步的用户
11. replication_password pwd123 //设置主从同步用户密码
13. agent_user agent //mmm-agent控制数据库用户
14. agent_password agent //mmm-agent控制数据库用户密码
15. </host>
17. <host master1> //设置第一个主服务器
18. ip 192.168.4.10 //master1 IP 地址
19. mode master
20. peer master2 //指定另外一台主服务器
21. </host>
23. <host master2> //指定另外一台主服务器
24. ip 192.168.4.11
25. mode master
26. peer master1
27. </host>
29. <host slave1> //设置第一台从服务器
30. ip 192.168.4.12 //slave1 IP 地址
31. mode slave //本段落配置的是slave服务器
32. </host>
34. <host slave2>
35. ip 192.168.4.13
36. mode slave
37. </host>
39. <role writer> //设置写入服务器工作模式
40. hosts master1,master2 //提供写的主服务器
41. ips 192.168.4.200 //设置VIP地址
42. mode exclusive //排他模式
43. </role>
45. <role reader> //设置读取服务器工作模式
46. hosts slave1,slave2 //提供读的服务器信息
47. ips 192.168.4.201,192.168.4.202 //多个虚拟IP
48. mode balanced //均衡模式
49. </role>
50. [root@master1 ~]#
2）修改管理主机配置文件（monitor主机配置）
1. [root@monitor ~]# vim /etc/mysql-mmm/mmm_mon.conf
2. include mmm_common.conf
4. <monitor>
5. ip 192.168.4.100 //设置管理主机IP地址
6. pid_path /var/run/mmm_mond.pid
7. bin_path /usr/lib/mysql-mmm/
8. status_path /var/lib/misc/mmm_mond.status
9. ping_ips 192.168.4.10,192.168.4.11,192.168.4.12,192.168.4.13
10. //设置被监控数据库
11. </monitor>
13. <host default>
14. monitor_user monitor //监控数据库MySQL用户
  monitor_password monitor //监控数据库MySQL用户密码
15. </host>
17. debug 0
18. [root@monitor ~]#
3）修改客户端配置文件

master1配置
1. [root@master1 ~]# cat /etc/mysql-mmm/mmm_agent.conf
2. include mmm_common.conf
3. this master1
master2配置
1. [root@master2 ~]# cat /etc/mysql-mmm/mmm_agent.conf
2. include mmm_common.conf
3. this master2
slave1配置
1. [root@slave1 ~]# cat /etc/mysql-mmm/mmm_agent.conf
2. include mmm_common.conf
3. this slave1
slave2配置
1. [root@slave2 ~]# cat /etc/mysql-mmm/mmm_agent.conf
2. include mmm_common.conf
3. this slave2
3 MySQL-MMM架构使用

3.1 问题

本案例要求基于普通版的MySQL服务器改造MMM架构，完成以下任务操作：
- 启动MMM集群架构
- 设置集群中服务器为online状态
3.2 方案

MySQL-MMM架构部署完成后需要启动，数据库端启动mmm-agent进程，管理端启动mmm-monitor进程，启动完成后设置所有数据库主机状态为online。

3.3 步骤

实现此案例需要按照如下步骤进行。

步骤一：启动MMM集群架构

1）启动mmm-agent进程

master1操作：
1. [root@master1 ~]# /etc/init.d/mysql-mmm-agent start
2. Daemon bin: '/usr/sbin/mmm_agentd'
3. Daemon pid: '/var/run/mmm_agentd.pid'
4. Starting MMM Agent daemon... Ok
master2操作：
1. [root@master2 ~]# /etc/init.d/mysql-mmm-agent start
2. Daemon bin: '/usr/sbin/mmm_agentd'
3. Daemon pid: '/var/run/mmm_agentd.pid'
4. Starting MMM Agent daemon... Ok
slave1操作：
1. [root@master2 ~]# /etc/init.d/mysql-mmm-agent start
2. Daemon bin: '/usr/sbin/mmm_agentd'
3. Daemon pid: '/var/run/mmm_agentd.pid'
4. Starting MMM Agent daemon... Ok
slave2操作：
1. [root@slave2 ~]# /etc/init.d/mysql-mmm-agent start
2. Daemon bin: '/usr/sbin/mmm_agentd'
3. Daemon pid: '/var/run/mmm_agentd.pid'
4. Starting MMM Agent daemon... Ok
2）启动mmm-monitor进程

monitor主机操作：
1. [root@monitor ~]# /etc/init.d/mysql-mmm-monitor start
2. Daemon bin: '/usr/sbin/mmm_mond'
3. Daemon pid: '/var/run/mmm_mond.pid'
4. Starting MMM Monitor daemon: Ok
步骤二：设置集群中服务器为online状态

控制命令只能在管理端monitor服务器上执行。

查看当前集群中各服务器状态：
1. [root@monitor ~]# mmm_control show
2. master1(192.168.4.10) master/AWAITING_RECOVERY. Roles:
3. master2(192.168.4.11) master/AWAITING_RECOVERY. Roles:
4. slave1(192.168.4.12) slave/AWAITING_RECOVERY. Roles:
5. slave2(192.168.4.13) slave/AWAITING_RECOVERY. Roles:
设置4台数据库主机状态为online：
1. [root@monitor ~]# mmm_control set_online master1
2. OK: State of 'master1' changed to ONLINE. Now you can wait some time and check its new roles!
3. [root@monitor ~]# mmm_control set_online master2
4. OK: State of 'master2' changed to ONLINE. Now you can wait some time and check its new roles!
5. [root@monitor ~]# mmm_control set_online slave1
6. OK: State of 'slave1' changed to ONLINE. Now you can wait some time and check its new roles!
7. [root@monitor ~]# mmm_control set_online slave2
8. OK: State of 'slave2' changed to ONLINE. Now you can wait some time and check its new roles!
9. [root@monitor ~]#
再次查看当前集群中各服务器状态：
1. [root@monitor ~]# mmm_control show
2. master1(192.168.4.10) master/ONLINE. Roles: writer(192.168.4.200)
3. master2(192.168.4.11) master/ONLINE. Roles:
4. slave1(192.168.4.12) slave/ONLINE. Roles: reader(192.168.4.201)
5. slave2(192.168.4.13) slave/ONLINE. Roles: reader(192.168.4.202)
7. [root@monitor ~]#
步骤三：测试MySQL-MMM架构

1）客户机安装MySQL-client软件包
1. [root@client ~]# tar xvf MySQL-5.6.15-1.el6.x86_64.rpm-bundle.tar
2. .. ..
3. [root@client ~]# rpm -ivh MySQL-client-5.6.15-1.el6.x86_64.rpm
4. .. ..
2）MySQL-MMM虚拟IP访问测试
1. [root@client ~]# mysql -h192.168.4.200 -uroot -ppwd123 -e "show databases"
2. Warning: Using a password on the command line interface can be insecure.
3. +--------------------+
4. | Database |
5. +--------------------+
6. | information_schema |
7. | mysql |
8. | performance_schema |
9. | tarena |
10. | test |
11. +--------------------+
12. [root@client ~]#
14. [root@client ~]# mysql -h192.168.4.200 -uroot -ppwd123 -e "show databases"
15. Warning: Using a password on the command line interface can be insecure.
16. +--------------------+
17. | Database |
18. +--------------------+
19. | information_schema |
20. | mysql |
21. | performance_schema |
22. | tarena |
23. | test |
24. +--------------------+
25. [root@client ~]#
27. [root@client ~]# mysql -h192.168.4.202 -uroot -ppwd123 -e "show databases"
28. Warning: Using a password on the command line interface can be insecure.
29. +--------------------+
30. | Database |
31. +--------------------+
32. | information_schema |
33. | mysql |
34. | performance_schema |
35. | tarena |
36. | test |
37. +--------------------+
38. [root@client ~]#
3）主数据库宕机测试
1. [root@master1 ~]# service mysql stop //停止master1上服务
2. Shutting down MySQL.... [确定]
3. [root@master1 ~]#
5. [root@monitor ~]# mmm_control show //查看集群内服务器状态
通过输出信息可以看到虚拟IP从master1切换到master2：
1. master1(192.168.4.10) master/HARD_OFFLINE. Roles:
2. master2(192.168.4.11) master/ONLINE. Roles: writer(192.168.4.200)
3. slave1(192.168.4.12) slave/ONLINE. Roles: reader(192.168.4.201)
4. slave2(192.168.4.13) slave/ONLINE. Roles: reader(192.168.4.202)
5. [root@monitor ~]#
7. [root@client ~]# mysql -h192.168.4.200 -uroot -ppwd123 -e "show databases" //访问虚拟IP测试
8. Warning: Using a password on the command line interface can be insecure.
9. +--------------------+
10. | Database |
11. +--------------------+
12. | information_schema |
13. | mysql |
14. | performance_schema |
15. | tarena |
16. | test |
17. +--------------------+
18. [root@client ~]#
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原文地址：https://www.cnblogs.com/qingbai/p/12017775.html

《综合》MMM集群

《综合》MMM集群

1 部署集群基础环境

1.1 问题

1.2 方案

1.3 步骤

2 MySQL-MMM架构部署

2.1 问题

2.2 方案

2.3 步骤

3 MySQL-MMM架构使用

3.1 问题

3.2 方案

3.3 步骤