mysql主從複製

環境是先前配置lnmp+keepalived負載均衡的2臺機器，IP分別是10.10.10.13和10.10.10.14.

1，登陸系統

Last login: Sun Jul 24 23:36:55 2016 from 10.10.10.1

[root@hd3 ~]# netstat -nltp

Active Internet connections (only servers)

Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name  

tcp        0      0 127.0.0.1:9000              0.0.0.0:*                   LISTEN      9471/php-fpm       

tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      9362/mysqld        

tcp        0      0 0.0.0.0:80                  0.0.0.0:*                   LISTEN      11021/nginx        

tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN      1961/sshd          

tcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN      1821/cupsd         

tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      2115/master        

tcp        0      0 :::22                       :::*                        LISTEN      1961/sshd          

tcp        0      0 ::1:631                     :::*                        LISTEN      1821/cupsd         

tcp        0      0 ::1:25                      :::*                        LISTEN      2115/master

 

注：主從機器mysql版本一致，並都已經初始化表並設置了root口令。

 

2、修改主從服務器配置文件的2個字段

 #vi /etc/my.cnf

       [mysqld]

       log-bin=mysql-bin   //啓用二進制日誌

       server-id=1      //服務器惟一ID，默認是1，這裏主的用的默認，從服務器改成2。以後 

# service mysqld restart

Stopping mysqld:  [  OK  ]

Starting mysqld:  [  OK  ]

 

3，在主服務器上創建賬戶並受權slave:

 #mysql -uroot -p  

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 2

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>GRANT REPLICATION SLAVE ON *.* to 'sync'@'%' identified by '123456';

查詢master的狀態，記錄下 FILE 及 Position 的值

mysql> show master status;

+------------------+----------+--------------+------------------+

| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |

+------------------+----------+--------------+------------------+

| mysql-bin.000002 |      251 |              |                  |

+------------------+----------+--------------+------------------+

1 row in set (0.00 sec)

 

4，配置從服務器

# mysql -uroot -p         

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 2

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> change master to master_host='10.10.10.13',master_user='sync',master_password='123456',master_log_file='my

sql-bin.000002',master_log_pos=251;

Query OK, 0 rows affected (0.03 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: 10.10.10.13

                  Master_User: mysync

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: mysql-bin.000002

          Read_Master_Log_Pos: 251

               Relay_Log_File: mysqld-relay-bin.000002

                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: 251

              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)

關鍵是Slave_IO及Slave_SQL進程必定要都YES

 

 

5，主從複製測試

先在主mysql上：

mysql> create database fuck;

Query OK, 1 row affected (0.03 sec)

 

mysql> use fuck;

Database changed

mysql>

mysql>

mysql> create table fuck(id int(3),name char(10));

Query OK, 0 rows affected (0.08 sec)

 

mysql>

mysql>

mysql> insert into fuck values(001,'abcd');

Query OK, 1 row affected (0.00 sec)

 

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| fuck               |

| mysql              |

| test               |

+--------------------+

4 rows in set (0.03 sec)

 

mysql>

 

再登陸從mysql，主服務器上新增的數據都出來了

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| fuck               |

| mysql              |

| test               |

+--------------------+

4 rows in set (0.02 sec)

 

mysql> use fuck;

Database changed

mysql> select * from fuck;

+------+------+

| id   | name |

+------+------+

|    1 | abcd |

+------+------+

1 row in set (0.00 sec)

 

mysql>