MHA-Atlas-MySQL高可用集群2

MHA脚本管理方式

（1）获取管理脚本master_ip_failover

提示：yum安装的manager是没有这个脚本的。 
我们需要从manager的源码包里复制一个。

 

1. [root@mysql-db03 ~]# ll mha4mysql-manager-0.56.tar.gz
2. -rw-r--r--. 1 root root 113914 Sep 4 18:43 mha4mysql-manager-0.56.tar.gz
3. [root@mysql-db03 ~]# tar xf mha4mysql-manager-0.56.tar.gz
4. [root@mysql-db03 ~]# cd mha4mysql-manager-0.56
5. [root@mysql-db03 mha4mysql-manager-0.56]# cd samples/scripts/
6. [root@mysql-db03 scripts]# ll
7. total 32
8. -rwxr-xr-x. 1 4984 users 3648 Mar 31 2014 master_ip_failover #这就是管理虚拟IP的脚本
9. -rwxr-xr-x. 1 4984 users 9870 Mar 31 2014 master_ip_online_change
10. -rwxr-xr-x. 1 4984 users 11867 Mar 31 2014 power_manager
11. -rwxr-xr-x. 1 4984 users 1360 Mar 31 2014 send_report
12. [root@mysql-db03 scripts]# cp master_ip_failover /usr/local/bin/ #复制到/usr/local/bin目录下
13. [root@mysql-db03 scripts]# which master_ip_failover
14. /usr/local/bin/master_ip_failover

（2）修改mha配置文件

 

1. [root@mysql-db03 scripts]# vim /etc/mha/mha1.cnf
2. [root@mysql-db03 scripts]# cat /etc/mha/mha1.cnf
3. [server default]
4. manager_log=/var/log/mha/mha1/manager
5. manager_workdir=/var/log/mha/mha1
6. master_binlog_dir=/usr/local/mysql/data
7. master_ip_failover_script=/usr/local/bin/master_ip_failover #添加脚本位置
8. password=666666
9. ping_interval=2
10. repl_password=666666
11. repl_user=rep
12. ssh_user=root
13. user=mha
15. #candidate_master=1 #留着备用的注释项
16. #check_repl_delay=0 #留着备用的注释项
18. [server1]
19. hostname=192.168.200.20
20. port=3306
22. [server2]
23. hostname=192.168.200.28
24. port=3306
26. [server3]
27. hostname=192.168.200.29
28. port=3306

（3）修改源程序自带VIP漂移脚本

#在下边的脚本里添加如下4行代码： 
[root@mysql-db03 scripts]# sed -n '34,37p' /usr/local/bin/master_ip_failover 
my $vip = '192.168.0.60/24'; #定义VIP my $key = '0'; #定义网卡后缀数值，如果eth0就是0，eth1就是1 
my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip"; #绑定VIP的命令 my $ssh_stop_vip = "/sbin/ifconfig eth0:$key down"; #关闭VIP的命令

（4）重启动mha管理端

 

1. [root@mysql-db03 ~]# ps -ef | grep mha | grep -v grep #查看mha进程
2. root 14138 13211 0 19:22 pts/3 00:00:00 perl /usr/bin/masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover
3. [root@mysql-db03 ~]# pkill perl #杀掉perl进程
4. [1]+ Exit 1 nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/mha1/manager.log 2>&1
5. [root@mysql-db03 ~]# ps -ef | grep mha | grep -v grep #查看mha进程
6. [root@mysql-db03 ~]# nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > #启动mha进程 /var/log/mha/mha1/manager.log 2>&1 &

（1）查看mysql-db01网络状态 
 
（2）停掉mysql-db01的MySQL数据库服务

1. [root@localhost ~]# /etc/init.d/mysqld stop
2. Shutting down MySQL....... SUCCESS!
3. [root@localhost ~]# ifconfig #VIP没了
4. eth0 Link encap:Ethernet HWaddr 00:0C:29:E0:9C:4A
5. inet addr:192.168.200.20 Bcast:192.168.200.255 Mask:255.255.255.0
6. inet6 addr: fe80::20c:29ff:fee0:9c4a/64 Scope:Link
7. UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
8. RX packets:249568 errors:0 dropped:0 overruns:0 frame:0
9. TX packets:22184 errors:0 dropped:0 overruns:0 carrier:0
10. collisions:0 txqueuelen:1000
11. RX bytes:337973697 (322.3 MiB) TX bytes:3172031 (3.0 MiB)
13. lo Link encap:Local Loopback
14. inet addr:127.0.0.1 Mask:255.0.0.0
15. inet6 addr: ::1/128 Scope:Host
16. UP LOOPBACK RUNNING MTU:16436 Metric:1
17. RX packets:66 errors:0 dropped:0 overruns:0 frame:0
18. TX packets:66 errors:0 dropped:0 overruns:0 carrier:0
19. collisions:0 txqueuelen:0
20. RX bytes:10106 (9.8 KiB) TX bytes:10106 (9.8 KiB)

（3）查看mysql-db02 

（4）查看mysql-db03的主从同步情况 

（5）mysql-db01故障恢复

1. [root@localhost ~]# /etc/init.d/mysqld start
2. Starting MySQL........ SUCCESS!
3. [root@localhost ~]# mysql -uroot -p666666
4. Warning: Using a password on the command line interface can be insecure.
5. Welcome to the MySQL monitor. Commands end with ; or \g.
6. Your MySQL connection id is 1
7. Server version: 5.6.17-log MySQL Community Server (GPL)
9. Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
11. Oracle is a registered trademark of Oracle Corporation and/or its
12. affiliates. Other names may be trademarks of their respective
13. owners.
15. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
17. mysql> CHANGE MASTER TO MASTER_HOST='192.168.200.28', MASTER_PORT=3306, MASTER_AUTO_POSITION=1, MASTER_USER='rep', MASTER_PASSWORD='666666';
18. Query OK, 0 rows affected, 2 warnings (0.11 sec)
20. mysql> start slave;
21. Query OK, 0 rows affected, 1 warning (0.13 sec)
23. mysql> show slave status\G
24. *************************** 1. row ***************************
25. Slave_IO_State: Waiting for master to send event
26. Master_Host: 192.168.200.28
27. Master_User: rep
28. Master_Port: 3306
29. Connect_Retry: 60
30. Master_Log_File: mysql-bin.000006
31. Read_Master_Log_Pos: 231
32. Relay_Log_File: localhost-relay-bin.000002
33. Relay_Log_Pos: 361
34. Relay_Master_Log_File: mysql-bin.000006
35. Slave_IO_Running: Yes
36. Slave_SQL_Running: Yes
37. ...一下省略...

（6）补上缺失的mha配置文件

1. [root@localhost ~]# cat /etc/mha/mha1.cnf
2. [server default]
3. manager_log=/var/log/mha/mha1/manager
4. manager_workdir=/var/log/mha/mha1
5. master_binlog_dir=/usr/local/mysql/data
6. master_ip_failover_script=/usr/local/bin/master_ip_failover
7. password=666666
8. ping_interval=2
9. repl_password=666666
10. repl_user=rep
11. ssh_user=root
12. user=mha
14. [server1]
15. hostname=192.168.200.20
16. port=3306
18. [server2]
19. hostname=192.168.200.28
20. port=3306
22. [server3]
23. hostname=192.168.200.29
24. port=3306

（7）启动mha管理进程

1. [root@localhost ~]# ps -ef | grep mha | grep -v grep
2. [root@localhost ~]# nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/mha1/manager.log 2>&1 &
3. [1] 7382
4. [root@localhost ~]# ps -ef | grep mha | grep -v grep
5. root 7382 5389 1 03:14 pts/0 00:00:00 perl /usr/bin/masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover

配置binlog-server备份服务器

主库宕机，也许会造成主库binlog复制不及时而导致数据丢失的情况出现，因此配置binlog-server进行时时同步备份，是必要的一种安全手段。

 

修改mha配置文件

 

1. [root@localhost ~]# vim /etc/mha/mha1.cnf
2. [root@localhost ~]# cat /etc/mha/mha1.cnf
3. [server default]
4. manager_log=/var/log/mha/mha1/manager
5. manager_workdir=/var/log/mha/mha1
6. master_binlog_dir=/usr/local/mysql/data #全局的binlog存放位置
7. master_ip_failover_script=/usr/local/bin/master_ip_failover
8. password=666666
9. ping_interval=2
10. repl_password=666666
11. repl_user=rep
12. ssh_user=root
13. user=mha
15. [server1]
16. hostname=192.168.200.20
17. port=3306
19. [server2]
20. hostname=192.168.200.28
21. port=3306
23. [server3]
24. hostname=192.168.200.29
25. port=3306
27. [binlog1] #添加binlog模块
28. no_master=1 #不允许切换为主
29. hostname=192.168.200.29 #存放IP
30. master_binlog_dir=/data/mysql/binlog/ #binlog存放位置优先级比全局的高

 

拉取主库上的binlog日志到mysql-db03的存放目录里

1. [root@localhost ~]# mkdir -p /data/mysql/binlog #创建存放目录
2. [root@localhost ~]# cd /data/mysql/binlog #进入存放目录
3. [root@localhost binlog]# ll
4. total 0
5. [root@localhost binlog]# which mysqlbinlog
6. /usr/local/bin/mysqlbinlog
7. [root@localhost binlog]# mysqlbinlog -R --host=192.168.200.60 --user=mha --password=666666 --raw --stop-never mysql-bin.000001 & #拉取主库binlog,这里的IP是VIP的
8. [2] 8133
9. [root@localhost binlog]# Warning: Using a password on the command line interface can be insecure.
11. [root@localhost binlog]# ll
12. total 24
13. -rw-r--r--. 1 root root 143 Nov 25 03:37 mysql-bin.000001
14. -rw-r--r--. 1 root root 174 Nov 25 03:37 mysql-bin.000002
15. -rw-r--r--. 1 root root 685 Nov 25 03:37 mysql-bin.000003
16. -rw-r--r--. 1 root root 254 Nov 25 03:37 mysql-bin.000004
17. -rw-r--r--. 1 root root 254 Nov 25 03:37 mysql-bin.000005
18. -rw-r--r--. 1 root root 120 Nov 25 03:37 mysql-bin.000006
19. [root@localhost binlog]# ps -ef | grep mysqlbinlog | grep -v grep
20. root 8133 5389 0 03:37 pts/0 00:00:00 mysqlbinlog -R --host=192.168.200.60 --user=mha --password=x xxxx --raw --stop-never mysql-bin.000001

 

启动mha管理进程

 

1. [root@localhost binlog]# nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/mha1/manager.log 2>&1 &
2. [root@localhost binlog]# ps -ef | grep mysqlbinlog | grep -v grep
3. root 8133 5389 0 03:37 pts/0 00:00:00 mysqlbinlog -R --host=192.168.200.60 --user=mha --password=x xxxx --raw --stop-never mysql-bin.000001 #binlog进程在
4. [root@localhost binlog]# ps -ef | grep perl | grep -v grep
5. root 7382 5389 0 03:14 pts/0 00:00:01 perl /usr/bin/masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover #mha进程在