mysql主从复制

1、主库操做mysql

 

1、1查看主库系统及mysql信息sql



1数据库

2bash

3ide

4测试

5spa

6orm

[root@db01 ~]# cat /etc/redhat-release server

CentOS release 6.7 (Final)事务

[root@db01 ~]# uname -r

2.6.32-573.el6.x86_64

[root@db01 ~]# mysql --version

mysql  Ver 14.14 Distrib 5.5.32, for Linux (x86_64) using readline 5.1

 

1、2主库设置server-id以及开启binlog

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[root@db01 backup]# pwd

/server/backup

[root@db01 backup]# egrep "log-bin|server-id" /etc/my.cnf

server-id       = 51#IP结尾只适用于单实例),其余从库的server-id不要跟主库重复固然全部从库的也不要重复修改完必定记得重启库

log-bin=mysql-bin #主库开启binlog

 

1、3登陆主库

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[root@db01 ~]# mysql -uroot -poldboy123

 

1、4设置同步用户

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mysql> grant replication slave on *.* to 'rep'@'10.0.0.%' identified by 'oldboy123';

Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> select user,host from mysql.user;

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

| user | host      |

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

| rep  | 10.0.0.%  |

| root | 127.0.0.1 |

| root | ::1       |

|      | db01      |

| root | db01      |

|      | localhost |

| root | localhost |

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

7 rows in set (0.00 sec)

mysql> show grants for rep@'10.0.0.%';

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

| Grants for rep@10.0.0.%                                                                                               |

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

| GRANT REPLICATION SLAVE ON *.* TO 'rep'@'10.0.0.%' IDENTIFIED BY PASSWORD '*FE28814B4A8B3309DAC6ED7D3237ADED6DA1E515' |

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

1 row in set (0.00 sec)

 

1、5主库锁表(此时不能执行事务处理)

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mysql> flush table with read lock;

Query OK, 0 rows affected (0.00 sec)

 

1、6查看主库binlog信息

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mysql> show master status;

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

| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |

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

| mysql-bin.000002 |      289 |              |                  |

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

1 row in set (0.00 sec)

mysql> show databases;

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

| Database           |

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

| information_schema |

| mysql              |

| performance_schema |

| test               |

| testdb01           |

| testdb02           |

| testdb03           |

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

7 rows in set (0.00 sec)

 

1、7另开窗口导出主库现有数据

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[root@db01 backup]# mysqldump -uroot -poldboy123 --events -A -B|gzip>/server/backup/mysql_bak.2016-09-16.sql.gz 

[root@db01 backup]# ll

total 144

-rw-r--r-- 1 root root 144465 Sep 16 17:38 mysql_bak.2016-09-16.sql.gz

 

1、8发送给从库

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[root@db01 backup]# scp mysql_bak.2016-09-16.sql.gz root@10.0.0.52:/server/backup/

1、9主库关闭锁表状态

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mysql> unlock tables;

Query OK, 0 rows affected (0.00 sec)

 

2、从库操做

 

2、1查看从库系统及mysql信息

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[root@db02 ~]# cat /etc/redhat-release 

CentOS release 6.7 (Final)

[root@db02 ~]# uname -r

2.6.32-573.el6.x86_64

[root@db02 backup]# mysql --version

mysql  Ver 14.14 Distrib 5.5.32, for Linux (x86_64) using readline 5.1

[root@db02 backup]# pwd

/server/backup

 

2、2设置从库server-id

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[root@db02 backup]# egrep "log-bin|server-id" /etc/my.cnf

server-id       = 52  #IP结尾只适用于单实例),从库的server-id必定不要跟主库和其余库重复修改必定要重启数据库

#log-bin=mysql-bin    #从库必定不要开启binlog

 

2、3在从库对应解压主库发送的数据库备份文件

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[root@db02 backup]# ll

total 144

-rw-r--r-- 1 root root 144465 Sep 16 17:39 mysql_bak.2016-09-16.sql.gz

[root@db02 backup]# gzip -d mysql_bak.2016-09-16.sql.gz 

[root@db02 backup]# ll

total 520

-rw-r--r-- 1 root root 529834 Sep 16 17:39 mysql_bak.2016-09-16.sql

 

2、4从库导入主库对应数据库数据

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[root@db02 backup]# mysql -uroot -poldboy123 < mysql_bak.2016-09-16.sql 

[root@db02 ~]# mysql -uroot -poldboy123

 

2、5从库查看导入主库数据结果

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mysql> show databases;

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

| Database           |

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

| information_schema |

| mysql              |

| performance_schema |

| test               |

| testdb01           |

| testdb02           |

| testdb03           |

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

7 rows in set (0.00 sec)

 

2、6设置从库同步主库数据命令(主从复制关键命令)

mysql> CHANGE MASTER TOMASTER_HOST='10.0.0.51',MASTER_PORT=3306,MASTER_LOG_FILE='mysql-bin.000002',MASTER_LOG_POS=289,MASTER_USER='rep',MASTER_PASSWORD='oldboy123';

Query OK, 0 rows affected (0.03 sec)

#注意这里的MASTER_LOG_FILE='mysql-bin.000002'和MASTER_LOG_POS=289是对应上述主库在锁表时查看主库状态信息的内容,对应“一、6查看主库binlog信息”。

 

2、7必定要先执行上述change master再start slave

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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: 10.0.0.51

                  Master_User: rep

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: mysql-bin.000002

          Read_Master_Log_Pos: 289

               Relay_Log_File: db02-relay-bin.000002

                Relay_Log_Pos: 253

        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: 289

              Relay_Log_Space: 408

              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: 51

1 row in set (0.00 sec)

mysql> show databases;

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

| Database           |

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

| information_schema |

| mysql              |

| performance_schema |

| test               |

| testdb01           |

| testdb02           |

| testdb03           |

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

7 rows in set (0.00 sec)

 

3、主库和从库测试

 

#测试主库数据是否同步到了从库

3、1主库操做

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mysql> create database testdb04;

Query OK, 1 row affected (0.00 sec)

mysql> show databases like 'testdb04';

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

| Database (testdb04) |

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

| testdb04            |

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

1 row in set (0.00 sec)

 

3、2从库查看

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mysql> show databases like 'testdb04';

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

| Database (testdb04) |

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

| testdb04            |

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

1 row in set (0.00 sec)

 

#现主从同步测试成功。

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