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Linux下MySQL主從同步配置,linuxmysql主從同步

Linux下MySQL主從同步配置,linuxmysql主從同步


Linux下MySQL主從同步配置,linuxmysql主從同步


Centos6.5 MySQL主從同步 MySQL版本5.6.25

主服務器:centos6.5 IP:192.168.1.101

從服務器:centos6.5 IP:192.168.1.102

一、主服務器相關配置

  1、創建同步賬戶並指定服務器地址

[root@localhost ~]mysql -uroot -p
mysql>use mysql
mysql>grant replication slave on *.* to 'testuser'@'192.168.1.102' identified by '12345678';
mysql>flush privileges #刷新權限

  授權用戶testuser只能從192.168.1.102這個地址訪問主服務器192.168.1.101的數據庫,並且只具有數據庫備份的權限

  2、修改/etc/my.cnf配置文件vi /etc/my.cnf

[mysqld]下添加以下參數,若文件中已經存在,則不用添加
server-id=1  
log-bin=mysql-bin  #啟動MySQL二進制日志系統,
binlog-do-db=ourneeddb  #需要同步的數據庫
binlog-ignore-db=mysql   #不同步mysql系統數據庫,若還有其它不想同步的,繼續添加
[root@localhost ~]/etc/init.d/mysqld restart #重啟服務

  3、查看主服務器master狀態(注意File與Position項,從服務器需要這兩項參數)

mysql> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000012 |      120 | ourneeddb| mysql            |
+------------------+----------+--------------+------------------+

  4、導出數據庫

  導出數據庫之前先鎖定數據庫

  flush tables with read lock;    #數據庫只讀鎖定命令,防止導出數據庫的時候有數據寫入

  unlock tables; #解除鎖定

  導出數據庫結構及數據:mysqldump -uroot -p ourneeddb > /home/ourneeddb.sql

  導出存儲過程及函數 :mysqldump -uroot -p -ntd -R ourneeddb > ourneeddb_func.sql

  tips:-ntd導出存儲過程、-R導出函數

 

 二、從服務器相關配置

  1、修改/etc/my.cnf配置文件vi /etc/my.cnf

[mysqld]下添加以下參數,若文件中已經存在,則不用添加
server-id=2   #設置從服務器id,必須於主服務器不同
log-bin=mysql-bin  #啟動MySQ二進制日志系統
replicate-do-db=ourneeddb   #需要同步的數據庫名
replicate-ignore-db=mysql   #不同步mysql系統數據庫
[root@localhost~ ]/etc/init.d/mysqld restart #重啟服務

  2、導入數據庫

  導入過程這裡不做闡述

    3、配置主從同步

[root@localhost~ ]mysql -uroot -p
mysql>use mysql 
mysql>stop slave;
mysql>change master to 
      master_host='192.168.1.101',
      master_user='testuser',
      master_password='12345678',
      master_log_file='mysql-bin.000012',
      master_log_pos=120;  #log_file與log_pos是主服務器master狀態下的File與Position
mysql>start slave;
mysql>show slave status\G;

 

*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.101
Master_User: testuser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000012
Read_Master_Log_Pos: 120
Relay_Log_File: orange-2-relay-bin.000003
Relay_Log_Pos: 283
Relay_Master_Log_File: mysql-bin.000012
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: orange
Replicate_Ignore_DB: mysql,test,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: 120
Relay_Log_Space: 1320
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: 773d2987-6821-11e6-b9e0-00163f0004f9
Master_Info_File: /home/mysql/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  

注意查看Slave_IO_Running: Yes  Slave_SQL_Running: Yes 這兩項必須為Yes 以及Log_File、Log_Pos要於master狀態下的File,Position相同

如果都是正確的,則說明配置成功!

 

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