Mysql5.6.22双向复制+KeepAlived如何配置mysql的高可用

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1. 基础安装环境  ，采用mysql5.6.22和keepalived-1.2.15版本安装mysql高可用

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1. [root@xxt01 ~]# groupadd mysql

2. [root@xxt01 ~]#useradd -g mysql -s /sbin/nologin -d /opt/mysql mysql

2.3  检查 mysql账号

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1. [root@xxt01 ~]#mkdir -p /usr/local/mysql

2. [root@xxt01 ~]#mkdir -p /usr/local/mysql/data

 2.4.1 执行cmake：       

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1. mysql> show master status;
   

2. +---------------------+----------+--------------+------------------+-------------------+
   

3. | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
   

4. +---------------------+----------+--------------+------------------+-------------------+
   

5. | mysql-binlog.000002 | 624556 | | | |
   

6. +---------------------+----------+--------------+------------------+-------------------+
   

7. 1 row in set (0.00 sec)
   

8. 
   

9. mysql>

    master 同步操作，参数Slave_IO_Running和Slave_SQL_Running为YES时表示成功，同时无其他错误

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1. mysql> grant replication slave on *.* to 'slave'@'10.6.0.203' identified by '123456';

2. Query OK, 0 rows affected (0.00 sec)

3. 
   

4. mysql>  flush privileges;

5. Query OK, 0 rows affected (0.00 sec)

6. 
   

7. mysql> change master to master_host='10.6.0.204',master_user='slave',master_passWord='123456',master_log_file='mysql-binlog.000002',master_log_pos=624556;

8. Query OK, 0 rows affected, 2 warnings (0.01 sec)

9. 
   

10. mysql> start slave;

11. Query OK, 0 rows affected (0.01 sec)

12. mysql> show slave status\G;
    *************************** 1. row ***************************
                   Slave_IO_State: Waiting for master to send event
                      Master_Host: 10.6.0.204
                      Master_User: slave
                      Master_Port: 3306
                    Connect_Retry: 60
                  Master_Log_File: mysql-binlog.000002
              Read_Master_Log_Pos: 624556
                   Relay_Log_File: xxt01-relay-bin.000002
                    Relay_Log_Pos: 286
            Relay_Master_Log_File: mysql-binlog.000002
                 Slave_IO_Running: Yes
                Slave_SQL_Running: Yes
                  Replicate_Do_DB: 
              Replicate_Ignore_DB: 
               Replicate_Do_Table: 
           Replicate_Ignore_Table: 
          Replicate_Wild_Do_Table: 
      Replicate_Wild_Ignore_Table: 
                       Last_Errno: 0
                       Last_Error: 
                     Skip_Counter: 0
              Exec_Master_Log_Pos: 624556
                  Relay_Log_Space: 459
                  Until_Condition: None
                   Until_Log_File: 
                    Until_Log_Pos: 0
               Master_SSL_Allowed: No
               Master_SSL_CA_File: 
               Master_SSL_CA_Path: 
                  Master_SSL_Cert: 
                Master_SSL_Cipher: 
                   Master_SSL_Key: 
            Seconds_Behind_Master: 0
    Master_SSL_Verify_Server_Cert: No
                    Last_IO_Errno: 0
                    Last_IO_Error: 
                   Last_SQL_Errno: 0
                   Last_SQL_Error: 
      Replicate_Ignore_Server_Ids: 
                 Master_Server_Id: 2
                      Master_UUID: aa208c56-216f-11e6-ace3-000c29065661
                 Master_Info_File: /usr/local/mysql/data/master.info
                        SQL_Delay: 0
              SQL_Remaining_Delay: NULL
          Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
               Master_Retry_Count: 86400
                      Master_Bind: 
          Last_IO_Error_Timestamp: 
         Last_SQL_Error_Timestamp: 
                   Master_SSL_Crl: 
               Master_SSL_Crlpath: 
               Retrieved_Gtid_Set: 
                Executed_Gtid_Set: 
                    Auto_Position: 0
    1 row in set (0.00 sec)

4.配置keepalived ，实现主从自动切换 

    原理：keepalived用来解决单点故障，提供vrrp（虚拟路由冗余协议）以及healthcheck功能，提供一个vip虚拟ip；

    keepalived的作用是检测服务器的状态，当其中一台服务器出现问题，则将它从组中剔除，恢复后再将它加进来

    服务安装，同时保持master和slave服务配置相同。

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1. [root@xxt01 ~]# tar zxf keepalived-1.2.15.tar.gz

2. [root@xxt01 keepalived-1.2.15]# ./configure --prefix=/usr/local/keepalived

3. [root@xxt01 keepalived-1.2.15]# make && make install

4. [root@xxt01 etc]# cp -a /usr/local/keepalived/etc/rc.d/init.d/keepalived  /etc/init.d/

5. [root@xxt01 etc]# cp -a /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

6. [root@xxt01 etc]#   mkdir /etc/keepalived/

7. [root@xxt01 etc]# cp -a /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/

8. [root@xxt01 etc]# cp -a /usr/local/keepalived/sbin/keepalived /usr/sbin/

4.1 修改203的 /etc/keepalived/keepalived.conf 文件

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1. ! Configuration File for keepalived

2. 
   

3. global_defs {

4. notification_email {

5. acassen@firewall.loc

6. failover@firewall.loc

7. sysadmin@firewall.loc

8. }

9. notification_email_from Alexandre.Cassen@firewall.loc

10. smtp_server 192.168.200.1

11. smtp_connect_timeout 30

12. router_id LVS_DEVEL

13. }

14. 
    

15. vrrp_instance VI_1 {

16. state MASTER

17. interface eth0

18. virtual_router_id 51

19. priority 100

20. advert_int 1

21. authentication {

22. auth_type PASS

23. auth_pass 1111

24. }

25. virtual_ipaddress {

26. 10.6.0.205

27. }

28. }

29. 
    

30. # set mysqld

31. virtual_server 10.6.0.205 3306 {

32. delay_loop 6

33. lb_alGo wrr

34. lb_kind DR

35. persistence_timeout 50

36. protocol tcp

37. 
    

38. real_server 10.6.0.203 3306 {

39. weight 3

40. notify_down /etc/keepalived/killkeepalived.sh

41. TCP_CHECK {

42. connect_timeout 10

43. nb_get_retry 3

44. delay_before_retry 3

45. connect_port 3306

46. }

47. }

48. }

4.2配置 killkeepalived.sh

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1. [root@xxt01 etc]# vi /etc/keepalived/killkeepalived.sh

2. #!/bin/sh

3. pkill keepalived

4.3 分别检查mater和slave的 /var/log/message日志，分别做启停mysqld服务测试，信息如下表示服务正常。

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1. 203 master 服务器

2. May 24 15:47:38 xxt01 Keepalived_vrrp[14242]: Configuration is using : 63545 Bytes

3. May 24 15:47:38 xxt01 Keepalived_vrrp[14242]: Using LinkWatch kernel netlink reflector...

4. May 24 15:47:38 xxt01 Keepalived_vrrp[14242]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(10,11)]

5. May 24 15:47:38 xxt01 Keepalived_healthcheckers[14241]: Using LinkWatch kernel netlink reflector...

6. May 24 15:47:38 xxt01 Keepalived_healthcheckers[14241]: Activating healthchecker for service [10.6.0.203]:3306

7. May 24 15:47:39 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) Transition to MASTER STATE

8. May 24 15:47:40 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) Entering MASTER STATE

9. May 24 15:47:40 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) setting protocol VIPs.

10. May 24 15:47:40 xxt01 Keepalived_healthcheckers[14241]: Netlink reflector reports IP 10.6.0.205 added

11. May 24 15:47:40 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.6.0.205

12. May 24 15:47:45 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.6.0.205

13. May 24 15:56:27 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) Received higher prio advert

14. May 24 15:56:27 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) Entering BACKUP STATE

15. May 24 15:56:27 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) removing protocol VIPs.

16. May 24 15:56:27 xxt01 Keepalived_healthcheckers[14241]: Netlink reflector reports IP 10.6.0.205 removed

17. May 24 16:01:28 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) Transition to MASTER STATE

18. May 24 16:01:29 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) Entering MASTER STATE

19. May 24 16:01:29 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) setting protocol VIPs.

20. May 24 16:01:29 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.6.0.205

21. May 24 16:01:29 xxt01 Keepalived_healthcheckers[14241]: Netlink reflector reports IP 10.6.0.205 added

22. May 24 16:01:34 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.6.0.205

23. May 24 16:08:36 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) Received higher prio advert

24. May 24 16:08:36 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) Entering BACKUP STATE

25. May 24 16:08:36 xxt01 Keepalived_vrrp[14242]: VRRP_Instance(VI_1) removing protocol VIPs.

26. May 24 16:08:36 xxt01 Keepalived_healthcheckers[14241]: Netlink reflector reports IP 10.6.0.205 removed

27. 
    

28. 204 slave 服务器

29. May 24 16:08:36 xxt02 Keepalived[15014]: Starting Keepalived v1.2.15 (05/24,2016)

30. May 24 16:08:36 xxt02 Keepalived[15015]: Starting Healthcheck child process, pid=15016

31. May 24 16:08:36 xxt02 Keepalived[15015]: Starting VRRP child process, pid=15017

32. May 24 16:08:36 xxt02 Keepalived_healthcheckers[15016]: Netlink reflector reports IP 10.6.0.204 added

33. May 24 16:08:36 xxt02 Keepalived_healthcheckers[15016]: Netlink reflector reports IP fe80::20c:29ff:fe06:5661 added

34. May 24 16:08:36 xxt02 Keepalived_healthcheckers[15016]: ReGIStering Kernel netlink reflector

35. May 24 16:08:36 xxt02 Keepalived_healthcheckers[15016]: Registering Kernel netlink command channel

36. May 24 16:08:36 xxt02 Keepalived_vrrp[15017]: Netlink reflector reports IP 10.6.0.204 added

37. May 24 16:08:36 xxt02 Keepalived_vrrp[15017]: Netlink reflector reports IP fe80::20c:29ff:fe06:5661 added

38. May 24 16:08:36 xxt02 Keepalived_vrrp[15017]: Registering Kernel netlink reflector

39. May 24 16:08:36 xxt02 Keepalived_healthcheckers[15016]: Opening file '/etc/keepalived/keepalived.conf'.

40. May 24 16:08:36 xxt02 Keepalived_vrrp[15017]: Registering Kernel netlink command channel

41. May 24 16:08:36 xxt02 Keepalived_healthcheckers[15016]: Configuration is using : 11978 Bytes

42. May 24 16:08:36 xxt02 Keepalived_vrrp[15017]: Registering gratuitous ARP shared channel

43. May 24 16:08:36 xxt02 Keepalived_vrrp[15017]: Opening file '/etc/keepalived/keepalived.conf'.

44. May 24 16:08:36 xxt02 Keepalived_vrrp[15017]: Configuration is using : 63545 Bytes

45. May 24 16:08:36 xxt02 Keepalived_vrrp[15017]: Using LinkWatch kernel netlink reflector...

46. May 24 16:08:36 xxt02 Keepalived_healthcheckers[15016]: Using LinkWatch kernel netlink reflector...

47. May 24 16:08:36 xxt02 Keepalived_healthcheckers[15016]: Activating healthchecker for service [10.6.0.204]:3306

48. May 24 16:08:36 xxt02 Keepalived_vrrp[15017]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(10,11)]

49. May 24 16:08:36 xxt02 Keepalived_vrrp[15017]: VRRP_Instance(VI_1) Transition to MASTER STATE

50. May 24 16:08:36 xxt02 Keepalived_vrrp[15017]: VRRP_Instance(VI_1) Received lower prio advert, forcing new election

51. May 24 16:08:37 xxt02 Keepalived_vrrp[15017]: VRRP_Instance(VI_1) Entering MASTER STATE

52. May 24 16:08:37 xxt02 Keepalived_vrrp[15017]: VRRP_Instance(VI_1) setting protocol VIPs.

53. May 24 16:08:37 xxt02 Keepalived_healthcheckers[15016]: Netlink reflector reports IP 10.6.0.205 added

54. May 24 16:08:37 xxt02 Keepalived_vrrp[15017]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.6.0.205

55. May 24 16:08:42 xxt02 Keepalived_vrrp[15017]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.6.0.205

56. May 24 16:10:14 xxt02 yum[15023]: Installed: 2:nmap-5.51-3.el6.x86_64

4.4 检查服务

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1. [root@xxt01 mysql]# nmap 10.6.0.205

2. 
   

3. Starting Nmap 5.51 ( Http://nmap.org ) at 2016-05-24 16:14 CST

4. mass_dns: warning: Unable to determine any DNS servers. Reverse DNS is disabled. Try using --system-dns or specify valid servers with --dns-servers

5. Nmap scan report for 10.6.0.205

6. Host is up (0.00029s latency).

7. Not shown: 998 closed ports

8. PORT     STATE SERVICE

9. 111/tcp  open  rpcbind

10. 3306/tcp open  mysql

11. Mac Address: 00:0C:29:06:56:61 (VMware)

12. 
    

13. Nmap done: 1 IP address (1 host up) scanned in 1.21 seconds

14. [root@xxt01 mysql]# nmap 10.6.0.203

15. 
    

16. Starting Nmap 5.51 ( http://nmap.org ) at 2016-05-24 16:15 CST

17. mass_dns: warning: Unable to determine any DNS servers. Reverse DNS is disabled. Try using --system-dns or specify valid servers with --dns-servers

18. Nmap scan report for 10.6.0.203

19. Host is up (0.0000050s latency).

20. Not shown: 998 closed ports

21. PORT     STATE SERVICE

22. 111/tcp  open  rpcbind

23. 3306/tcp open  mysql

24. 
    

25. Nmap done: 1 IP address (1 host up) scanned in 0.08 seconds

26. [root@xxt01 mysql]#

27. 
    

28. 
    

29. [root@xxt01 mysql]# nmap 10.6.0.205

30. 
    

31. Starting Nmap 5.51 ( http://nmap.org ) at 2016-05-24 16:14 CST

32. mass_dns: warning: Unable to determine any DNS servers. Reverse DNS is disabled. Try using --system-dns or specify valid servers with --dns-servers

33. Nmap scan report for 10.6.0.205

34. Host is up (0.00029s latency).

35. Not shown: 998 closed ports

36. PORT     STATE SERVICE

37. 111/tcp  open  rpcbind

38. 3306/tcp open  mysql

39. MAC Address: 00:0C:29:06:56:61 (VMware)

40. 
    

41. Nmap done: 1 IP address (1 host up) scanned in 1.21 seconds

42. [root@xxt01 mysql]# nmap 10.6.0.203

43. 
    

44. Starting Nmap 5.51 ( http://nmap.org ) at 2016-05-24 16:15 CST

45. mass_dns: warning: Unable to determine any DNS servers. Reverse DNS is disabled. Try using --system-dns or specify valid servers with --dns-servers

46. Nmap scan report for 10.6.0.203

47. Host is up (0.0000050s latency).

48. Not shown: 998 closed ports

49. PORT     STATE SERVICE

50. 111/tcp  open  rpcbind

51. 3306/tcp open  mysql

52. 
    

53. Nmap done: 1 IP address (1 host up) scanned in 0.08 seconds

54. [root@xxt01 mysql]#

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