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  • 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 
    image_1ct49rr4n1u4u10ekivciov7532m.png-56.2kB 
    （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 
    image_1ct4a0vr519181v0u1v3qp1l65a33.png-57.7kB

    （4）查看mysql-db03的主从同步情况 
    image_1ct4a454g1mbcag113hup508v23g.png-48kB
    （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 statusG
    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
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  • 原文地址：https://www.cnblogs.com/fengdou/p/10014906.html
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