码迷,mamicode.com
首页 > 数据库 > 详细

MySQL建立主-从服务器双机热备配置

时间:2018-07-03 20:10:08      阅读:239      评论:0      收藏:0      [点我收藏+]

标签:ignore   cert   sql_delay   rem   ast   mat   一个   mmu   _id   

一、准备环境

  1.主服务器A(192.168.0.176),从服务器B(192.168.0.13)。

  2.两台服务器上都部署了mysql数据库。(两台服务器上的数据库版本必须是一致的)

  3.再两台服务器上分别创建rb-test数据库,并创建数据表user。

二、主服务器A双机热备配置步骤

  1、创建同步用户

  进入mysql操作界面,在主服务器A上为从服务器建立一个连接帐户,该帐户必须授予REPLICATION SLAVE权限。因为从mysql版本3.2以后就可以通过REPLICATION对其进行双机热备的功能操作。

mysql> grant replication slave on *.* to zhutong@192.168.0.13 identified by zhutong#123;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

  2、创建好同步连接帐户后,我们可以通过在从服务器B上用zhutong帐户对主服务器A(Master)数据库进行访问下,看下是否能连接成功。

[root@ecs ~]# mysql -h192.168.0.176 -uzhutong -pzhutong#123
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.7.21 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, 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> 

  3、修改主服务器A数据库的配置 

vi /etc/my.cnf
#加上
server-id = 1
log-bin=mysql-bin
binlog-do-db = rb
binlog-ignore-db = mysql

  4、重启mysql数据库

service restart mysql

  5、查看主服务器的状态

[root@ecs-d68e-0003 use-tools]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 765
Server version: 5.7.21-log MySQL Community Server (GPL)
mysql> flush table with read lock;
Query OK, 0 rows affected (0.00 sec)
mysql> show master status\G;
*************************** 1. row ***************************
             File: mysql-bin.000006
         Position: 154
     Binlog_Do_DB: rb
 Binlog_Ignore_DB: mysql
Executed_Gtid_Set: 
1 row in set (0.00 sec)

ERROR: 
No query specified

  注意看里面的参数,特别前面两个File和Position,在从服务器(Slave)配置主从关系会有用到的。

  6、锁表

  注:这里使用了锁表,目的是为了产生环境中不让进新的数据,好让从服务器定位同步位置,初次同步完成后,记得解锁。 

unlock tables;

三、从服务器B双机热备配置步骤

  1、修改配置文件

vi /etc/my.cnf
#添加如下内容
[mysqld]
server-id = 2
log-bin=mysql-bin
replicate-do-db = rb
replicate-ignore-db = mysql,information_schema,performance_schema

  2、重启数据库

service restart mysql

  3.用change mster 语句指定同步位置

  这步是最关键的一步了,在进入mysql操作界面后,输入如下指令:

[root@ecs-d68e-0002 DB]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.21-log MySQL Community Server (GPL)

mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> change master to master_host=192.168.0.176,master_user=zhutong,master_password=zhutong#123,master_log_file=mysql-bin.000001,master_log_pos=154;
Query OK, 0 rows affected, 2 warnings (0.02 sec)
#成功后,则可以开启slave线程了。
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)

  4、查看从服务器(Slave)状态

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.0.176
                  Master_User: zhutong
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000006
          Read_Master_Log_Pos: 154
               Relay_Log_File: ecs-d68e-0002-relay-bin.000007
                Relay_Log_Pos: 367
        Relay_Master_Log_File: mysql-bin.000006
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: rb
          Replicate_Ignore_DB: mysql,information_schema,performance_schema
           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: 154
              Relay_Log_Space: 795
              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: 1
                  Master_UUID: 31e0c365-7e73-11e8-b6ee-fa163ee46a49
             Master_Info_File: /home/zhutong/DB/datas/mysql/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           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
         Replicate_Rewrite_DB: 
                 Channel_Name: 
           Master_TLS_Version: 
1 row in set (0.00 sec)

ERROR: 
No query specified

  查看下面两项值均为Yes,即表示设置从服务器成功。
  Slave_IO_Running: Yes
  Slave_SQL_Running: Yes

四、测试同步

  1、查看主从数据库中rb数据库user表的数据(我们rb数据库中只有一张表);

  主-A  

mysql> use rb;
Database changed
mysql> show tables;
+--------------+
| Tables_in_rb |
+--------------+
| user         |
+--------------+
1 row in set (0.01 sec)
mysql> select * from user;
Empty set (0.00 sec)
mysql> 

  从-B 

mysql> use rb;
Database changed
mysql> show tables;
+--------------+
| Tables_in_rb |
+--------------+
| user         |
+--------------+
1 row in set (0.00 sec)
mysql> select * from user;
Empty set (0.00 sec)

  现在可以在Master服务器中插入数据看下是否能同步。

  2、在主服务器上数据库写数据,看能不能同步。

mysql> use rb;
Database changed
mysql> insert into user values(zbbiex,15352453201);
ERROR 1136 (21S01): Column count doesnt match value count at row 1
mysql> insert into user values(1,zbbiex,15352453201);
Query OK, 1 row affected (0.00 sec)

mysql> select * from user;
+----+--------+-------------+
| id | name   | mobile      |
+----+--------+-------------+
|  1 | zbbiex | 15352453201 |
+----+--------+-------------+
1 row in set (0.00 sec)

mysql> 

  3、在从服务器B上查看是不是数据已经同步过去了

mysql> use rb;
Database changed
mysql> select * from user;
+----+--------+-------------+
| id | name   | mobile      |
+----+--------+-------------+
|  1 | zbbiex | 15352453201 |
+----+--------+-------------+
1 row in set (0.00 sec)

mysql> 

  可以看到数据已经同步过去,完全没问题;

 

MySQL建立主-从服务器双机热备配置

标签:ignore   cert   sql_delay   rem   ast   mat   一个   mmu   _id   

原文地址:https://www.cnblogs.com/abbiex/p/9244665.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!