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[MySQL] Heartbeat+Drbd+Mysql主从高可用实现

数据库 数据库 发布于:2021-07-03 21:38 | 阅读数:378 | 评论:0

  在上一篇中已经实现了MySQL服务的高可用,MySQL的数据目录放在drbd的共享目录中,并且只有获取到heartbeat资源的VIP才能挂载共享目录,从而启动MySQL服务,但是两端的数据使用drbd同步,保证发生故障时,服务和资源能够从一个节点切换到另外一个节点,下面是一个简略的架构图:

DSC0000.jpg

  对于MySQL服务,一般在生产环境中都要做主从结构,从而保证数据的完整性,所以这次要在这个架构的前提下,在两个heartbeat节点下再部署一台MySQL从库,而主库是heartbeat集群中的一台(主库的IP设置为VIP地址),从而实现发生故障时,从库可以自动切换到另一台主库下面,主从同步的状态保持稳定。
DSC0001.jpg

  当heartbeat01获取VIP时,MySQL主库跑在heartbeat01上,MySQL从库从heartbeat01同步数据,heartbeat02相当于备份服务器,通过drbd的块设备同步heartbeat01上drbd目录的内容。
DSC0002.jpg

  当heartbeat02获取VIP时,MySQL主库跑在heartbeat02上,MySQL从库从heartbeat02同步数据,heartbeat01相当于备份服务器,通过drbd的块设备同步heartbeat02上drbd目录的内容。
  注意:本文中出现的节点1/节点2都是指heartbeat的节点,而Master节点/Slave节点都是指MySQL节点。
  一、环境准备
  这里需要添加一台主机,主要信息如下:
主机名角色IP地址
server136.contoso.comMySQL从库(Slave)192.168.49.136
  以下都在上一篇的基础上完成《Heartbeat+Drbd+MySQL高可用》
  1)两个节点上依次启动heartbeat服务:
  [root@heartbeat01 ~]# /etc/init.d/heartbeat start
  Starting High-Availability services: INFO:  Resource is stopped
  Done.
  [root@heartbeat02 ~]# /etc/init.d/heartbeat start
  Starting High-Availability services: INFO:  Resource is stopped
  Done.
  2)检查两个节点的状态
  节点1heartbeat01:

  [root@heartbeat01 ~]# ip a |grep 49.100
      inet 192.168.49.100/24 scope global eth1
  [root@heartbeat01 ~]# cat /proc/drbd
  version: 8.3.16 (api:88/proto:86-97)
  GIT-hash: a798fa7e274428a357657fb52f0ecf40192c1985 build by phil@Build64R6, 2014-11-24 14:51:37
   0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
      ns:216 nr:0 dw:216 dr:3929 al:4 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
  [root@heartbeat01 ~]# ll /data
  total 16
  drwxr-xr-x 3 mysql mysql 4096 Sep 27 01:17 lib
  drwxr-xr-x 3 mysql mysql 4096 Sep 27 01:21 lock
  drwxr-xr-x 2 mysql mysql 4096 Sep 27 01:18 log
  drwxr-xr-x 3 mysql mysql 4096 Sep 27 01:17 run
  [root@heartbeat01 ~]# /etc/init.d/mysqld status
  mysqld (pid  2414) is running...
  [root@heartbeat01 ~]# lsof -i :3306
  COMMAND  PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
  mysqld  2414 mysql   18u  IPv4  12859      0t0  TCP *:mysql (LISTEN)
  

  节点2 heartbeat02:
  [root@heartbeat02 ~]# ip a |grep 49.100
  [root@heartbeat02 ~]# cat /proc/drbd
  version: 8.3.16 (api:88/proto:86-97)
  GIT-hash: a798fa7e274428a357657fb52f0ecf40192c1985 build by phil@Build64R6, 2014-11-24 14:51:37
   0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----
      ns:0 nr:784 dw:784 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
  [root@heartbeat02 ~]# ll /data
  total 0
  [root@heartbeat02 ~]# /etc/init.d/mysqld status
  mysqld is stopped
  二、MySQL主从复制
  1、配置heartbeat01
  因为节点1(heartbeat01)目前正在运行数据库,所以需要先在heartbeat01上进行配置,当然如果MySQL和heartbeat的资源正在运行在heartbeat02上,也可以先对heartbeat02进行配置,配置的目的是保证两个节点上MySQL Master节点的配置完成,且能正常运行。
  1)配置/etc/my.cnf,添加Master配置
  [root@heartbeat01 ~]# cp /etc/my.cnf /etc/my.cnf.bak$(date +%F)
  [root@heartbeat01 ~]# vi /etc/my.cnf
  [root@heartbeat01 ~]# diff /etc/my.cnf.bak2016-09-27 /etc/my.cnf
  6a7,10
  > ######################################
  > #add master settings
  > log-bin=mysql-bin
  > server-id=1
  # 主从配置就不多讲了,网上的教程有很多,这里也只是开启了binlog并添加serverID,没有做详细的设置。
  2)导出Master节点的数据

  [root@heartbeat01 ~]# mysqldump -uroot -p123456 --database tb01 > /root/tb01.sql
  # 因为之前我创建了一个tb01的数据库,所以这里先将该数据库备份
  [root@heartbeat01 ~]# ll tb01.sql
  -rw-r--r-- 1 root root 2008 Sep 27 22:14 tb01.sql
  [root@heartbeat01 ~]# scp tb01.sql 192.168.49.136:/tmp/
  root@192.168.49.136's password:
  tb01.sql                                                   100% 2008     2.0KB/s   00:00   
  # 然后通过scp拷贝到MySQL从库(server136)上
  3)创建备份账号
  [root@heartbeat01 ~]# mysql -uroot -p123456
  # 登录MySQL
mysql> grant replication slave on *.* to 'replication'@'192.168.49.136' identified by 'rep@123';
Query OK, 0 rows affected (0.00 sec)
  

  # 创建主从同步账号并授权
mysql> select Host,User,Password from mysql.user;
+-------------------------+-------------+-------------------------------------------+
| Host          | User    | Password                  |
+-------------------------+-------------+-------------------------------------------+
| localhost         | root    | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| heartbeat01.contoso.com | root    |                       |
| 127.0.0.1         | root    |                       |
| localhost         |       |                       |
| heartbeat01.contoso.com |       |                       |
| 192.168.49.136      | replication | *6E0E8E398CC10050A0AF2E9B4B27FBF3181D220A |
+-------------------------+-------------+-------------------------------------------+
6 rows in set (0.00 sec)
  # 检查一下创建的结果
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> quit
Bye
  4)重启MySQL,查询Master状态
[root@heartbeat01 ~]# /etc/init.d/mysqld restart
mysql> show master status;
+------------------+----------+--------------+------------------+
| File       | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000001 |    344 |        |          |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
mysql> quit
Bye
  2、配置heartbeat02

  因为heartbeat02暂时没有获取VIP,也未运行MySQL服务,所以只需要修改/etc/my.cnf文件,将Master的配置加入进去即可,这里采用scp的方式从节点1上复制过来。
  [root@heartbeat02 ~]# mv /etc/my.cnf /etc/my.cnf.bak$(date +%F)
  [root@heartbeat02 ~]# scp heartbeat01:/etc/my.cnf /etc/
  Warning: Permanently added the RSA host key for IP address '172.16.49.133' to the list of known hosts.
  root@heartbeat01's password:
  my.cnf                                                     100%  345     0.3KB/s   00:00   
  [root@heartbeat02 ~]# diff /etc/my.cnf.bak2016-09-27 /etc/my.cnf
  6a7,10
  > ######################################
  > #add master settings
  > log-bin=mysql-bin
  > server-id=1
  3、配置Slave节点(server136)
  1)安装MySQL
  [root@server136 ~]# yum -y install mysql-devel mysql-server
  [root@server136 ~]# /etc/init.d/mysqld start
  [root@server136 ~]# mysqladmin -uroot password '123456'
  2)修改配置文件
  [root@server136 ~]# cp /etc/my.cnf /etc/my.cnf.bak$(date +%F)
  [root@server136 ~]# vi /etc/my.cnf
  [root@server136 ~]# diff /etc/my.cnf.bak2016-09-28 /etc/my.cnf
  6a7,9
  > ####################################
  > #add slave settings
  > server-id=2
  # 只需要在/etc/my.cnf中添加一行server-id=值

  3)导入Master上导出的数据
  [root@server136 ~]# /etc/init.d/mysqld restart
  Stopping mysqld:                                           [  OK  ]
  Starting mysqld:                                           [  OK  ]
  [root@server136 ~]# mysql -uroot -p123456 < /tmp/tb01.sql
  下面进入MySQL数据库查看一下导入的数据:
  [root@server136 ~]# mysql -uroot -p123456
  Welcome to the MySQL monitor.  Commands end with ; or \g.
  Your MySQL connection id is 6
  Server version: 5.1.73 Source distribution
  

  Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
  

  Oracle is a registered trademark of Oracle Corporation and/or its
  affiliates. Other names may be trademarks of their respective
  owners.
  

  Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
  

  mysql> select * from tb01.staff;
  +----+-------+
  | id | name  |
  +----+-------+
  |  1 | Tom   |
  |  2 | Jerry |
  +----+-------+
  2 rows in set (0.01 sec)
  

  mysql> quit
  Bye
  4)启动slave节点
mysql> change master to 
  -> master_host = '192.168.49.100',
  -> master_user = 'replication',
  -> master_password = 'rep@123',
  -> master_log_file = 'mysql-bin.000001',
  -> master_log_pos = 344;
Query OK, 0 rows affected (0.10 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
*************************** 1. row ***************************
         Slave_IO_State: Waiting for master to send event
          Master_Host: 192.168.49.100
          Master_User: replication
          Master_Port: 3306
        Connect_Retry: 60
        Master_Log_File: mysql-bin.000001
      Read_Master_Log_Pos: 344
         Relay_Log_File: mysqld-relay-bin.000002
        Relay_Log_Pos: 251
    Relay_Master_Log_File: mysql-bin.000001
       Slave_IO_Running: Yes
      Slave_SQL_Running: Yes #这两项为Yes说明主从复制成功
        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: 344
        Relay_Log_Space: 407
        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: 
1 row in set (0.00 sec)
  5)主从复制测试
  现在在Master上创建一张表,并插入数据:
[root@heartbeat01 ~]# mysql -uroot -p123456
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.1.73-log Source distribution
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> use tb01;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> create table test01( id int not null, name varchar(100), age int, sex varchar(20), city varchar(40) );
Query OK, 0 rows affected (0.05 sec)
mysql> insert into test01 values (001,'zhangsan',20,'Male','Beijing');
Query OK, 1 row affected (0.00 sec)
mysql> insert into test01 values (002,'lisi',25,'Male','Shanghai');
Query OK, 1 row affected (0.00 sec)
mysql> insert into test01 values (003,'wangwu',28,'Female','Shenzhen');
Query OK, 1 row affected (0.00 sec)
mysql> select * from test01;
+----+----------+------+--------+----------+
| id | name   | age  | sex  | city   |
+----+----------+------+--------+----------+
|  1 | zhangsan |   20 | Male   | Beijing  |
|  2 | lisi   |   25 | Male   | Shanghai |
|  3 | wangwu   |   28 | Female | Shenzhen |
+----+----------+------+--------+----------+
3 rows in set (0.00 sec)
  然后到Slave上去查看,是否存在对应的表和数据:
[root@server136 ~]# mysql -uroot -p123456
mysql> use tb01;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show tables;
+----------------+
| Tables_in_tb01 |
+----------------+
| staff      |
+----------------+
1 row in set (0.00 sec)
mysql> show tables;
+----------------+
| Tables_in_tb01 |
+----------------+
| staff      |
| test01     |
+----------------+
2 rows in set (0.00 sec)
mysql> select * from test01;
+----+----------+------+--------+----------+
| id | name   | age  | sex  | city   |
+----+----------+------+--------+----------+
|  1 | zhangsan |   20 | Male   | Beijing  |
|  2 | lisi   |   25 | Male   | Shanghai |
|  3 | wangwu   |   28 | Female | Shenzhen |
+----+----------+------+--------+----------+
3 rows in set (0.00 sec)
  在Slave上可以看到Master上创建的表和插入的数据,说明主从复制正常。
  三、MySQL的Master节点故障切换测试
  1、首先停止heartbeat01上的heartbeat服务
  [root@heartbeat01 ~]# /etc/init.d/heartbeat stop
  Stopping High-Availability services: Done.
  

  [root@heartbeat01 ~]#
  此时,heartbeat01上的状态为:
  [root@heartbeat01 ~]# ip a |grep 49.100
  [root@heartbeat01 ~]# cat /proc/drbd
  version: 8.3.16 (api:88/proto:86-97)
  GIT-hash: a798fa7e274428a357657fb52f0ecf40192c1985 build by phil@Build64R6, 2014-11-24 14:51:37
   0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----
      ns:1004 nr:416 dw:1420 dr:3981 al:7 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
  [root@heartbeat01 ~]# ll /data/
  total 0
  [root@heartbeat01 ~]# /etc/init.d/mysqld status
  mysqld is stopped
  heartbeat02上的状态为:
  [root@heartbeat02 ~]# ip a |grep 49.100
      inet 192.168.49.100/24 scope global eth1
  [root@heartbeat02 ~]# cat /proc/drbd
  version: 8.3.16 (api:88/proto:86-97)
  GIT-hash: a798fa7e274428a357657fb52f0ecf40192c1985 build by phil@Build64R6, 2014-11-24 14:51:37
   0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
      ns:340 nr:1004 dw:1344 dr:3937 al:6 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
  [root@heartbeat02 ~]# ll /data
  total 16
  drwxr-xr-x 3 mysql mysql 4096 Sep 27 01:17 lib
  drwxr-xr-x 3 mysql mysql 4096 Sep 27 01:21 lock
  drwxr-xr-x 2 mysql mysql 4096 Sep 27 01:18 log
  drwxr-xr-x 3 mysql mysql 4096 Sep 27 01:17 run
  [root@heartbeat02 ~]# /etc/init.d/mysqld status
  mysqld (pid  2629) is running...
  [root@heartbeat02 ~]# lsof -i :3306
  COMMAND  PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
  mysqld  2629 mysql   18u  IPv4  14300      0t0  TCP *:mysql (LISTEN)
  2、检查主从同步状态
  1)在Slave节点上查看Slave状态
mysql> show slave status\G
*************************** 1. row ***************************
         Slave_IO_State: Waiting for master to send event
          Master_Host: 192.168.49.100
          Master_User: replication
          Master_Port: 3306
        Connect_Retry: 60
        Master_Log_File: mysql-bin.000002
      Read_Master_Log_Pos: 106
         Relay_Log_File: mysqld-relay-bin.000007
        Relay_Log_Pos: 251
    Relay_Master_Log_File: mysql-bin.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: 106
        Relay_Log_Space: 552
        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: 
1 row in set (0.00 sec)
  2)在heartbeat02上进入MySQL新增一条数据,查看从库能否同步
[root@heartbeat02 ~]# mysql -uroot -p123456
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.1.73-log Source distribution
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> select * from tb01.test01;
+----+----------+------+--------+----------+
| id | name   | age  | sex  | city   |
+----+----------+------+--------+----------+
|  1 | zhangsan |   20 | Male   | Beijing  |
|  2 | lisi   |   25 | Male   | Shanghai |
|  3 | wangwu   |   28 | Female | Shenzhen |
+----+----------+------+--------+----------+
3 rows in set (0.04 sec)
mysql> use tb01;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> insert into test01 values(4,'zhaosi',40,'Male','Tieling');
Query OK, 1 row affected (0.00 sec)
mysql> insert into test01 values(5,'xiaoshenyang',34,'Male','Shenyang');
Query OK, 1 row affected (0.00 sec)
mysql> select * from tb01.test01;
+----+--------------+------+--------+----------+
| id | name     | age  | sex  | city   |
+----+--------------+------+--------+----------+
|  1 | zhangsan   |   20 | Male   | Beijing  |
|  2 | lisi     |   25 | Male   | Shanghai |
|  3 | wangwu     |   28 | Female | Shenzhen |
|  4 | zhaosi     |   40 | Male   | Tieling  |
|  5 | xiaoshenyang |   34 | Male   | Shenyang |
+----+--------------+------+--------+----------+
5 rows in set (0.01 sec)
  然后到Slave上进行查看同步状况:
mysql> show tables;
+----------------+
| Tables_in_tb01 |
+----------------+
| staff      |
| test01     |
+----------------+
2 rows in set (0.00 sec)
mysql> select * from test01;
+----+--------------+------+--------+----------+
| id | name     | age  | sex  | city   |
+----+--------------+------+--------+----------+
|  1 | zhangsan   |   20 | Male   | Beijing  |
|  2 | lisi     |   25 | Male   | Shanghai |
|  3 | wangwu     |   28 | Female | Shenzhen |
|  4 | zhaosi     |   40 | Male   | Tieling  |
|  5 | xiaoshenyang |   34 | Male   | Shenyang |
+----+--------------+------+--------+----------+
5 rows in set (0.00 sec)
  在Slave上能看到Master上新插入的两条数据,说明主从同步没有问题,主节点的切换不影响Slave的同步。
  3、再次开启heartbeat01上的heartbeat服务,查看heartbeat01上是否有heartbeat02上插入的数据
  [root@heartbeat01 ~]# /etc/init.d/heartbeat start
  Starting High-Availability services: INFO:  Resource is stopped
  Done.
  1)heartbeat01的状态

  [root@heartbeat01 ~]# ip a |grep 49.100
      inet 192.168.49.100/24 scope global eth1
  [root@heartbeat01 ~]# cat /proc/drbd
  version: 8.3.16 (api:88/proto:86-97)
  GIT-hash: a798fa7e274428a357657fb52f0ecf40192c1985 build by phil@Build64R6, 2014-11-24 14:51:37
   0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
      ns:1256 nr:740 dw:1996 dr:7918 al:8 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
  [root@heartbeat01 ~]# ll /data/
  total 16
  drwxr-xr-x 3 mysql mysql 4096 Sep 27 01:17 lib
  drwxr-xr-x 3 mysql mysql 4096 Sep 27 01:21 lock
  drwxr-xr-x 2 mysql mysql 4096 Sep 27 01:18 log
  drwxr-xr-x 3 mysql mysql 4096 Sep 27 01:17 run
  [root@heartbeat01 ~]# /etc/init.d/mysqld status
  mysqld (pid  4211) is running...
  [root@heartbeat01 ~]# lsof -i :3306
  COMMAND  PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
  mysqld  4211 mysql   19u  IPv4  16116      0t0  TCP *:mysql (LISTEN)
  mysqld  4211 mysql   39u  IPv4  16163      0t0  TCP 192.168.49.100:mysql->192.168.49.136:36693 (ESTABLISHED)
  2)heartbeat02的状态:
  [root@heartbeat02 ~]# ip a|grep 49.100
  [root@heartbeat02 ~]# cat /proc/drbd
  version: 8.3.16 (api:88/proto:86-97)
  GIT-hash: a798fa7e274428a357657fb52f0ecf40192c1985 build by phil@Build64R6, 2014-11-24 14:51:37
   0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----
      ns:740 nr:1360 dw:2100 dr:4005 al:8 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
  [root@heartbeat02 ~]# ll /data
  total 0
  [root@heartbeat02 ~]# /etc/init.d/mysqld status
  mysqld is stopped
  3)在heartbeat01上登录MySQL查看是否有heartbeat02上插入的数据
  [root@heartbeat01 ~]# mysql -uroot -p123456
mysql> select * from tb01.test01;
+----+--------------+------+--------+----------+
| id | name     | age  | sex  | city   |
+----+--------------+------+--------+----------+
|  1 | zhangsan   |   20 | Male   | Beijing  |
|  2 | lisi     |   25 | Male   | Shanghai |
|  3 | wangwu     |   28 | Female | Shenzhen |
|  4 | zhaosi     |   40 | Male   | Tieling  |
|  5 | xiaoshenyang |   34 | Male   | Shenyang |
+----+--------------+------+--------+----------+
5 rows in set (0.03 sec)
  可以看到,heartbeat02上插入的数据也已经通过drbd同步成功了。
  4)再次检查Slave节点上的主从同步状态
mysql> show slave status\G;
*************************** 1. row ***************************
         Slave_IO_State: Waiting for master to send event
          Master_Host: 192.168.49.100
          Master_User: replication
          Master_Port: 3306
        Connect_Retry: 60
        Master_Log_File: mysql-bin.000003
      Read_Master_Log_Pos: 106
         Relay_Log_File: mysqld-relay-bin.000009
        Relay_Log_Pos: 251
    Relay_Master_Log_File: mysql-bin.000003
       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: 106
        Relay_Log_Space: 552
        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: 
1 row in set (0.00 sec)
  在server136上可以看到,主从状态依然正常。
  5)在heartbeat01上删除一条记录
mysql> select * from tb01.test01;
+----+--------------+------+--------+----------+
| id | name     | age  | sex  | city   |
+----+--------------+------+--------+----------+
|  1 | zhangsan   |   20 | Male   | Beijing  |
|  2 | lisi     |   25 | Male   | Shanghai |
|  3 | wangwu     |   28 | Female | Shenzhen |
|  4 | zhaosi     |   40 | Male   | Tieling  |
|  5 | xiaoshenyang |   34 | Male   | Shenyang |
+----+--------------+------+--------+----------+
5 rows in set (0.03 sec)
mysql> delete from tb01.test01 where name = 'lisi';
Query OK, 1 row affected (0.00 sec)
mysql> select * from tb01.test01;
+----+--------------+------+--------+----------+
| id | name     | age  | sex  | city   |
+----+--------------+------+--------+----------+
|  1 | zhangsan   |   20 | Male   | Beijing  |
|  3 | wangwu     |   28 | Female | Shenzhen |
|  4 | zhaosi     |   40 | Male   | Tieling  |
|  5 | xiaoshenyang |   34 | Male   | Shenyang |
+----+--------------+------+--------+----------+
4 rows in set (0.00 sec)
  6)在Slave节点(server136)上进行查询
[root@server136 ~]# mysql -uroot -p123456
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 6
Server version: 5.1.73 Source distribution
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> select * from tb01.test01;
+----+--------------+------+--------+----------+
| id | name     | age  | sex  | city   |
+----+--------------+------+--------+----------+
|  1 | zhangsan   |   20 | Male   | Beijing  |
|  3 | wangwu     |   28 | Female | Shenzhen |
|  4 | zhaosi     |   40 | Male   | Tieling  |
|  5 | xiaoshenyang |   34 | Male   | Shenyang |
+----+--------------+------+--------+----------+
4 rows in set (0.00 sec)
mysql> quit
Bye
[root@server136 ~]#
  可以看到,数据已经同步,说明主从同步没有问题。至此,heartbeat+drbd+MySQL主从高可用的部署完成。

  
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