mysql master slave配置

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环境:

master:192.168.2.142
slave   :192.168.2.143
两者都装了mysql 5.6.10
硬件环境都一样,vmware下centos 6.2
内存 1GB
磁盘 20GB
CPU 2个

在master端创建测试数据库
[root@localhost ~]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.10 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> create database kenyon_master;
Query OK, 1 row affected (0.03 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| kenyon_master      |
| mysql              |
| performance_schema |
| test               |
+--------------------+
5 rows in set (0.00 sec)

mysql> use kenyon_master;
Database changed
mysql> create table t_kenyon(id int);
Query OK, 0 rows affected (0.07 sec)

mysql> insert into t_kenyon values(1),(2),(3);
Query OK, 3 rows affected (0.01 sec)
Records: 3  Duplicates: 0  Warnings: 0

mysql> select * from t_kenyon;
+------+
| id   |
+------+
|    1 |
|    2 |
|    3 |
+------+
3 rows in set (0.00 sec)

mysql> show master status;
Empty set (0.00 sec)

mysql> \q
Bye
[root@localhost ~]#

修改master端/etc/my.cnf

[mysqld]
log-bin=mysql-bin
server-id    =1
binlog-do-db=kenyon_master
binlog-ignore-db=mysql,test,information_schema,performance_schema
bind-address = 0.0.0.0

innodb_data_home_dir = /usr/local/mysql/data/
innodb_log_group_home_dir = /usr/local/mysql/data/
innodb_buffer_pool_size = 256M
innodb_additional_mem_pool_size = 20M
innodb_log_file_size = 64M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50

重启master端DB,使修改生效,并创建slave端连到master端的用户
[root@localhost ~]# /etc/init.d/mysqld restart
Shutting down MySQL.. SUCCESS!
Starting MySQL............ SUCCESS!
[root@localhost ~]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.10-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> show variables like 'innodb_data_home_dir';
+----------------------+------------------------+
| Variable_name        | Value                  |
+----------------------+------------------------+
| innodb_data_home_dir | /usr/local/mysql/data/ |
+----------------------+------------------------+
1 row in set (0.00 sec)

mysql> show variables like 'innodb_additional_mem_pool_size';
+---------------------------------+----------+
| Variable_name                   | Value    |
+---------------------------------+----------+
| innodb_additional_mem_pool_size | 20971520 |
+---------------------------------+----------+
1 row in set (0.00 sec)

mysql> show master stauts;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'stauts' at line 1
mysql> show master status;
+------------------+----------+---------------+--------------------------------------------------+-------------------+
| File             | Position | Binlog_Do_DB  | Binlog_Ignore_DB                                 | Executed_Gtid_Set |
+------------------+----------+---------------+--------------------------------------------------+-------------------+
| mysql-bin.000001 |      120 | kenyon_master | mysql,test,information_schema,performance_schema |                   |
+------------------+----------+---------------+--------------------------------------------------+-------------------+
1 row in set (0.02 sec)


mysql> grant replication slave on *.* to repluser@'192.168.2.143' identified by '123456';
Query OK, 0 rows affected (0.07 sec)

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

mysql> \q
Bye
[root@localhost ~]#


备份master端数据,并拷贝至slave端

mysql> flush tables with read lock;
Query OK, 0 rows affected (0.00 sec)

mysql>  show master status;
+------------------+----------+---------------+--------------------------------------------------+-------------------+
| File             | Position | Binlog_Do_DB  | Binlog_Ignore_DB                                 | Executed_Gtid_Set |
+------------------+----------+---------------+--------------------------------------------------+-------------------+
| mysql-bin.000002 |      120 | kenyon_master | mysql,test,information_schema,performance_schema |                   |
+------------------+----------+---------------+--------------------------------------------------+-------------------+
1 row in set (0.00 sec)

mysql>

另外一个session:
[root@localhost log]# cd /usr/local/mysql/data
[root@localhost data]# tar -zcvf backup.tar.gz kenyon_master
kenyon_master/
kenyon_master/t_kenyon.frm
kenyon_master/t_kenyon.ibd
kenyon_master/db.opt
[root@localhost data]#
[root@localhost data]# scp backup.tar.gz [email protected]:/usr/local/mysql/data/
The authenticity of host '192.168.2.143 (192.168.2.143)' can't be established.
RSA key fingerprint is 21:85:2a:f7:28:41:61:57:68:6c:3b:47:0a:25:92:47.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.2.143' (RSA) to the list of known hosts.
[email protected]'s password:
backup.tar.gz                                                                                                                                                                                              100%  887     0.9KB/s   00:00  
[root@localhost data]#

回到之前的session,解锁

mysql> unlock tables;
Query OK, 0 rows affected (0.00 sec)


修改slave端的/etc/my.cnf
[mysqld]
server-id  = 2
master-host     =   192.168.2.142   #5.5以上废弃
master-user     =   repluser            #5.5以上废弃
master-password =   123456           #5.5以上废弃
master-port     =   3306                  #5.5以上废弃
master-connect-retry=60           #重试时间60秒, #5.5以上废弃
replicate-do-db=kenyon_master #需要同步的库
log-slave-updates=1               #启用从库日志,这样可以设置链式复制
read-only = 1   #0表示可读写,1表示只读,但是只针对普通用户,超级用户和同步用户不受此限制



重启后查看状态:

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State:
                  Master_Host: 192.168.2.142
                  Master_User: repluser
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 120
               Relay_Log_File: localhost-relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: mysql-bin.000002
             Slave_IO_Running: No
            Slave_SQL_Running: No
              Replicate_Do_DB: kenyon_master
          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: 120
              Relay_Log_Space: 120
              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: NULL
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: 0
                  Master_UUID:
             Master_Info_File: /usr/local/mysql/data/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State:
           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)

上面有两个参数:Slave_IO_Running, Slave_SQL_Running的状态是NO,说明有问题,网络已经排查,我们重启slave后,发现正常了。
mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> start slave;
Query OK, 0 rows affected (0.10 sec)

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.2.142
                  Master_User: repluser
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 120
               Relay_Log_File: localhost-relay-bin.000002
                Relay_Log_Pos: 283
        Relay_Master_Log_File: mysql-bin.000002
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: kenyon_master
          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: 120
              Relay_Log_Space: 460
              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: 707d5ebf-8493-11e2-9e08-000c29202821
             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)

mysql>

这个时候master端的数据变化可以反映在slave端(在master库里新增删表或者修改数据,在slave端查看是否同步)。

master端的进程
mysql> show processlist\G
*************************** 1. row ***************************
     Id: 12
   User: root
   Host: localhost
     db: kenyon_master
Command: Sleep
   Time: 1481
  State:
   Info: NULL
*************************** 2. row ***************************
     Id: 20
   User: root
   Host: localhost
     db: kenyon_master
Command: Query
   Time: 0
  State: init
   Info: show processlist
*************************** 3. row ***************************
     Id: 23
   User: repluser
   Host: 192.168.2.143:59811
     db: NULL
Command: Binlog Dump
   Time: 708
  State: Master has sent all binlog to slave; waiting for binlog to be updated
   Info: NULL
3 rows in set (0.02 sec)


slave端的进程
mysql> show processlist\G
*************************** 1. row ***************************
     Id: 5
   User: root
   Host: localhost
     db: kenyon_master
Command: Query
   Time: 0
  State: init
   Info: show processlist
*************************** 2. row ***************************
     Id: 10
   User: system user
   Host:
     db: NULL
Command: Connect
   Time: 602
  State: Waiting for master to send event
   Info: NULL
*************************** 3. row ***************************
     Id: 11
   User: system user
   Host:
     db: NULL
Command: Connect
   Time: 282
  State: Slave has read all relay log; waiting for the slave I/O thread to update it
   Info: NULL
3 rows in set (0.03 sec)

至此,一个master-slave的配置已经完成。

change master to master_host='172.168.2.148',master_user='repluser',master_password='123456',master_log_file='mysql-bin.000003',master_log_pos=120


如果需要做级联复制,则加一下
log-slave-updates=1
加完这个重启从机,查看是否生效:
mysql> show variables like 'log_slave_%';
+-------------------+-------+
| Variable_name     | Value |
+-------------------+-------+
| log_slave_updates | ON   |
+-------------------+-------+
1 row in set (0.00 sec)

配好了从机有可能需要重启一下


如果多个DB复制
binlog-do-db=DB1
binlog-do-db=DB2
binlog-do-db=DB3

replicate-do-db=DB1
replicate-do-db=DB2
replicate-do-db=DB3

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