部署集羣基礎環境，MySQL-MMM架構部署，MySQL-MMM架構使用

部署集羣基礎環境

1.1 問題

本案例要求爲MySQL集羣準備基礎環境，完成如下任務操做：

• 數據庫受權
• 部署MySQL雙主多從結構
• 配置本機hosts解析記錄

1.2 方案

使用4臺RHEL 6虛擬機，如圖-1所示。其中192.168.4.十、192.168.4.11做爲MySQL雙主服務器，192.168.4.十二、192.168.4.13做爲主服務器的從服務器。

圖－1

1.3 步驟

實現此案例須要按照以下步驟進行。

步驟一：準備環境

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 ~]#

步驟二：部署數據庫主機

1）安裝啓動數據庫（4臺數據庫主機master1，master2，slave1，slave2執行如下操做）

1. [root@master1 ~]# tar xvf MySQL-5.6.15-1.el6.x86_64.rpm-bundle.tar    //解壓軟件包
2. .. ..
3. [root@master1 ~]# rpm -Uvh MySQL-*.rpm                                //安裝MySQL
4. .. ..
5. [root@master1 ~]# service mysql start
6. Starting MySQL. [肯定]

2）初始化配置數據庫（4臺數據庫主機master1，master2，slave1，slave2執行如下操做）

1. [root@master1 ~]# cat /root/.mysql_secret         //查看隨機生成密碼
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        //使用隨機生成密碼登錄
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");     //修改數據庫root密碼
19. Query OK, 0 rows affected (0.49 sec)
21. mysql> exit
22. Bye
23. [root@master1 ~]#

步驟三：部署雙主多從結構

1）數據庫受權（4臺數據庫主機master1，master2，slave1，slave2執行如下操做）

部署主從同步只須要受權一個主從同步用戶便可，可是咱們要部署MySQL-MMM架構，因此在這裏咱們將MySQL-MMM所需用戶一併進行受權設置。再受權一個測試用戶，在架構搭建完成時測試使用。

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.

數據庫受權部分爲了方便試驗咱們直接容許全部地址訪問了，真實環境需謹慎

1. mysql> grant replication slave on *.* to slaveuser@"%" identified by "pwd123";                                //主從同步受權
2. Query OK, 0 rows affected (0.00 sec)
4. mysql> grant replication client on *.* to monitor@"%" identified by "monitor";                                         //MMM所需架構用戶受權
5. Query OK, 0 rows affected (0.06 sec)        
7. mysql> grant replication client,process,super on *.* to agent@"%" identified by "agent";                                 //MMM所需架構用戶受權
8. Query OK, 0 rows affected (0.00 sec)
10. mysql> grant all on *.* to root@"%" identified by "pwd123"; //測試用戶受權
11. Query OK, 0 rows affected (0.00 sec)
13. mysql>

2）開啓主數據庫binlog日誌、設置server_id（master1，master2）

master1設置：

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                        //設置server_id,該值集羣中不能夠重複
7. log-bin                            //開啓bin-log日誌
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                //重啓MySQL服務
16. Shutting down MySQL.. [肯定]
17. Starting MySQL.. [肯定]
18. [root@master1 ~]# ls /var/lib/mysql/master1-bin*        //查看binlog日誌是否生成
19. /var/lib/mysql/master1-bin.000001 /var/lib/mysql/master1-bin.index
20. [root@master1 ~]#

master2設置：

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.. [肯定]
16. Starting MySQL. [肯定]
17. [root@master2 ~]# ls /var/lib/mysql/master2-bin.*
18. /var/lib/mysql/master2-bin.000001 /var/lib/mysql/master2-bin.index

3）從庫設置server_id

slave1設置：

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.. [肯定]
15. Starting MySQL.. [肯定]
16. [root@slave1 ~]#

slave2設置：

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.. [肯定]
15. Starting MySQL. [肯定]
16. [root@slave2 ~]#

4）配置主從從從關係

配置master二、slave一、slave2成爲master1的從服務器

查看master1服務器binlong日誌使用節點信息：

1. [root@master1 ~]# mysql -uroot -ppwd123
2. .. ..
3. mysql> show master status\G
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>

設置master2爲master1從：

1. [root@master2 ~]# mysql -uroot -ppwd123
2. .. ..
3. mysql> change master to                         //設置主服務器信息
4. -> master_host="192.168.4.10",                //設置主服務器IP地址
5. -> master_user="slaveuser",                //設置主從同步用戶
6. -> master_password="pwd123",                //設置主從同步密碼
7. -> master_log_file="master1-bin.000001",    //設置主庫binlog日誌名稱
8. -> master_log_pos=120;                        //設置主從binlog日誌使用節點
9. Query OK, 0 rows affected, 2 warnings (0.06 sec)
11. mysql> start slave;                            //啓動同步進程
12. Query OK, 0 rows affected (0.00 sec)
14. mysql> show slave status\G                        //查看主從是否成功
15. .. ..

啓動同步進程後查看IO節點和SQL節點是否爲Yes若是均爲Yes表示主從正常。

1. Slave_IO_Running: Yes                //IO節點正常
2. Slave_SQL_Running: Yes                //SQL節點正常
3. .. ..
4. mysql>

設置slave1爲master1從：

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 status\G
15. .. ..
16. Slave_IO_Running: Yes                //IO節點正常
17. Slave_SQL_Running: Yes                //SQL節點正常
18. .. ..
19. mysql>

設置slave2爲master1從：

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 status\G
15. .. ..
16. Slave_IO_Running: Yes                //IO節點正常
17. Slave_SQL_Running: Yes                //SQL節點正常
18. .. ..
19. mysql>

5）配置主主從從關係，將master1配置爲master2的從

查看master2的binlog使用信息：

1. [root@master2 ~]# mysql -uroot -ppwd123
2. .. ..
3. mysql> show master status\G
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>

設置master1成爲master2的從：

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 status\G
15. .. ..
16. Slave_IO_Running: Yes                //IO節點正常
17. Slave_SQL_Running: Yes                //SQL節點正常
18. .. ..
19. mysql>

6）測試主從架構是否成功

master1更新數據，查看其它主機是否同步：

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主機查看：

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主機查看：

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主機查看：

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架構部署

2.1 問題

本案例要求熟悉實現MySQL-MMM的架構部署，主要包括如下任務：

1. 安裝依賴包
2. 安裝軟件包
3. 配置MySQL-MMM

2.2 方案

使用5臺RHEL 6虛擬機，如圖-2所示。其中192.168.4.十、192.168.4.11做爲MySQL雙主服務器，192.168.4.十二、 192.168.4.13做爲主服務器的從服務器，192.168.4.100做爲MySQL-MMM架構中管理監控服務器，實現監控MySQL主從服務 器的工做狀態及決定故障節點的移除或恢復工做，架構搭建完成後使用客戶機192.168.4.120進行訪問，客戶機須要安裝MySQL-client軟 件包。

圖-2

2.3 步驟

實現此案例須要按照以下步驟進行。

步驟一：安裝MySQL-MMM

1）安裝依賴關係（MySQL集羣內5臺服務器master1，master2，slave1，slave2，monitor）均需安裝

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）安裝MySQL-MMM軟件依賴包（MySQL集羣內5臺服務器master1，master2，slave1，slave2，monitor）均需安裝，軟件包講師提供

安裝安裝Log-Log4perl 類

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%]

安裝Algorithm-Diff類

1. [root@mysql-master1 ~]# tar -zxvf Algorithm-Diff-1.1902.tar.gz //解壓安裝包
2. .. ..
3. [root@mysql-master1 ~]# cd Algorithm-Diff-1.1902                //切換到安裝目錄
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        //編譯，編譯安裝
10. .. ..
11. [root@mysql-master1 Algorithm-Diff-1.1902]# cd                //切換到軟件包目錄
12. [root@mysql-master1 ~]#

安裝Proc-Daemon類

1. [root@mysql-master1 ~]# tar -zxvf Proc-Daemon-0.03.tar.gz    //解壓安裝包
2. .. ..
3. [root@mysql-master1 ~]# cd Proc-Daemon-0.03                    //切換到安裝目錄
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    //編譯，編譯安裝
9. .. ..
10. [root@mysql-master1 Proc-Daemon-0.03]# cd                    //切換到軟件包目錄
11. [root@mysql-master1 ~]#

安裝Net-ARP虛擬IP分配工具：

1. [root@mysql-master1 ~]# gunzip Net-ARP-1.0.8.tgz    //使用gunzip解壓tgz格式的安裝包
2. [root@mysql-master1 ~]# tar xvf Net-ARP-1.0.8.tar            //解壓tar安裝包
3. .. ..
4. [root@mysql-master1 ~]# cd Net-ARP-1.0.8                    //切換到安裝目錄
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    //編譯，編譯安裝
11. .. ..
12. [root@mysql-master1 Net-ARP-1.0.8]# cd                        //切換到軟件包目錄
13. [root@mysql-master1 ~]#

安裝Mysql-MMM軟件包：

1. [root@mysql-master1 ~]# tar xvf mysql-mmm-2.2.1.tar.gz        //解壓安裝包
2. .. ..
3. [root@mysql-master1 ~]# cd mysql-mmm-2.2.1                    //切換到安裝目錄
4. [root@mysql-master1 mysql-mmm-2.2.1]# make && make install    //編譯，編譯安裝
5. .. ..
6. [root@mysql-master1 mysql-mmm-2.2.1]#

步驟二：修改配置文件

1）修改公共配置文件

本案例中MySQL集羣的5臺服務器（master一、master二、slave一、slave二、monitor）都須要配置，能夠先配好一臺後使用scp複製。

1. [root@master1 ~]# vim /etc/mysql-mmm/mmm_common.conf
2. active_master_role    writer
4. <host default>
5.     cluster_interface        eth0                //設置主從同步的用戶
7.     pid_path                /var/run/mmm_agentd.pid
8.     bin_path                /usr/lib/mysql-mmm/
10. replication_user slaveuser            //設置主從同步的用戶
11. replication_password pwd123            //設置主從同步用戶密碼
13.     agent_user            agent                //mmm-agent控制數據庫用戶
14.     agent_password        agent                //mmm-agent控制數據庫用戶密碼
15. </host>
17. <host master1>                            //設置第一個主服務器
18.     ip                    192.168.4.10            //master1 IP 地址
19.     mode                    master
20.     peer                    master2                //指定另一臺主服務器
21. </host>
23. <host master2>                            //指定另一臺主服務器
24.     ip                    192.168.4.11
25.     mode                    master
26.     peer                    master1
27. </host>
29. <host slave1>                                //設置第一臺從服務器
30.     ip                    192.168.4.12            //slave1 IP 地址
31.     mode                    slave                //本段落配置的是slave服務器
32. </host>
34. <host slave2>
35.     ip                    192.168.4.13
36.     mode                    slave
37. </host>
39. <role writer>                                //設置寫入服務器工做模式
40.     hosts                master1,master2        //提供寫的主服務器
41.     ips                    192.168.4.200        //設置VIP地址
42.     mode                    exclusive            //排他模式
43. </role>
45. <role reader>                                //設置讀取服務器工做模式
46.     hosts                slave1,slave2        //提供讀的服務器信息
47.     ips                    192.168.4.201,192.168.4.202    //多個虛擬IP
48.     mode                    balanced                        //均衡模式
49. </role>
50. [root@master1 ~]#

2）修改管理主機配置文件（monitor主機配置）

1. [root@monitor ~]# vim /etc/mysql-mmm/mmm_mon.conf
2. include mmm_common.conf
4. <monitor>
5.     ip                        192.168.4.100        //設置管理主機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.                                                 //設置被監控數據庫
11. </monitor>
13. <host default>
14.     monitor_user            monitor                    //監控數據庫MySQL用戶    monitor_password        monitor                    //監控數據庫MySQL用戶密碼
15. </host>
17. debug 0
18. [root@monitor ~]#

3）修改客戶端配置文件

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架構使用

3.1 問題

本案例要求基於普通版的MySQL服務器改造MMM架構，完成如下任務操做：

• 啓動MMM集羣架構
• 設置集羣中服務器爲online狀態

3.2 方案

MySQL-MMM架構部署完成後須要啓動，數據庫端啓動mmm-agent進程，管理端啓動mmm-monitor進程，啓動完成後設置全部數據庫主機狀態爲online。

3.3 步驟

實現此案例須要按照以下步驟進行。

步驟一：啓動MMM集羣架構

1）啓動mmm-agent進程

master1操做：

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操做：

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操做：

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操做：

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）啓動mmm-monitor進程

monitor主機操做：

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

步驟二：設置集羣中服務器爲online狀態

控制命令只能在管理端monitor服務器上執行。

查看當前集羣中各服務器狀態：

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:

設置4臺數據庫主機狀態爲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 ~]#

再次查看當前集羣中各服務器狀態：

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 ~]#

步驟三：測試MySQL-MMM架構

1）客戶機安裝MySQL-client軟件包

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虛擬IP訪問測試

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）主數據庫宕機測試

1. [root@master1 ~]# service mysql stop                    //中止master1上服務
2. Shutting down MySQL.... [肯定]
3. [root@master1 ~]#
5. [root@monitor ~]# mmm_control show                        //查看集羣內服務器狀態

經過輸出信息能夠看到虛擬IP從master1切換到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"    //訪問虛擬IP測試
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 ~]#