mysql主从复制搭建详细步骤

主机名称

IP地址

端口号

版本信息

操作系统

Master

192.168.111.21

3306

5.6.17

Redhat5.4

Slave

192.168.111.22

3306

5.6.23

Redhat5.4

配置成功的前置条件

版本一致或是从服务器的版本要高于主服务

初始化表，并在后台启动mysql

主从服务器安装并启动成功

修改root的密码

主服务器上授权(master)

修改主机服务的配置文件(/etc/my.cnf)

添加如下的内容

[root@master etc]# cat my.cnf

[mysqld]

log-bin=mysqsl-bin

server-id=101

修改后必须重新启动被修改的服务器才可以生效

mysql>

show master status;

Empty

set (0.00 sec)

如果还是空，就查看二进制日志是否开启

mysql>

show variables like '%log_bin%';

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

|

Variable_name| Value |

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

|

log_bin|

OFF|

|

log_bin_basename||

|

log_bin_index||

|

log_bin_trust_function_creators | OFF|

|

log_bin_use_v1_row_events|

OFF|

|

sql_log_bin| ON|

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

6

rows in set (0.00 sec)

那说明二进制日志没有开启，因此对配置文件查看，尤其查看配置文件的名称my.cnf(我写成了my.conf)，所以没有配置上去。

授权给从数据库服务器(slave server)

[root@master ~]# pwd

/root

mysql> grant replication slave on *.* to

'replication'@'192.168.111.22' identified by 'qilin';

Query OK, 0 rows affected (0.07 sec)

查询主数据库状态

mysql> show master status;

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

| File| Position | Binlog_Do_DB |

Binlog_Ignore_DB | Executed_Gtid_Set |

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

| mysqsl-bin.000001 |120||||

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

1 row in set (0.00 sec)

从服务器上的配置(slave)

修改从服务器的配置文件(/etc/my.cnf)

# add mian by liqilin

log-bin= mysql-bin

server-id= 201

relay-log= mysql-relay-bin

log-slave-updates

= 1

read-only= 1

从新启动服务器，启动MYSQL

执行同步SQL语句

mysql> change master to

-> master_host='192.168.111.21',

-> master_user='replication',

-> master_password='qilin',

-> master_log_file='mysqsl-bin.000001',

-> master_log_pos=120;

Query OK, 0 rows affected, 2 warnings (0.04

sec)

主从同步检查

mysql> show slave status\G

*************************** 1. row

***************************

Slave_IO_State:

Master_Host: 192.168.111.21

Master_User: replication

Master_Port: 3306

Connect_Retry: 60

Master_Log_File:

mysqsl-bin.000001

Read_Master_Log_Pos: 120

Relay_Log_File:

mysql-relay-bin.000001

Relay_Log_Pos: 4

Relay_Master_Log_File: mysqsl-bin.000001

Slave_IO_Running: No

Slave_SQL_Running: No

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: 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)

mysql>

启动Slave同步进程

mysql> start slave;

Query OK, 0 rows affected (0.02 sec)

再次查看状态

mysql> show slave status\G

*************************** 1. row

***************************

Slave_IO_State: Waiting for master to send

event

Master_Host: 192.168.111.21

Master_User: replication

Master_Port: 3306

Connect_Retry: 60

Master_Log_File:

mysqsl-bin.000001

Read_Master_Log_Pos: 120

Relay_Log_File:

mysql-relay-bin.000002

Relay_Log_Pos: 284

Relay_Master_Log_File: mysqsl-bin.000001

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: 120

Relay_Log_Space: 457

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: 101

Master_UUID:

75fc94ca-e819-11e4-b1ac-000c2969fa00

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>

变化了项目

Seconds_Behind_Master

Slave_SQL_Running_State

I/O线程创建的连接(SLAVE)

mysql> show processlist \G

*************************** 1. row

***************************

Id: 3

User: root

Host: localhost

db: NULL

Command: Query

Time: 0

State: init

Info: show processlist

*************************** 2. row

***************************

Id: 4

User: system user

Host:

db: NULL

Command: Connect

Time: 443

State: Waiting for master to send event

Info: NULL

*************************** 3. row

***************************

Id: 5

User: system user

Host:

db: NULL

Command: Connect

Time: 443

State: Slave has read all relay log; waiting for the slave I/O thread to

update it

Info: NULL

3 rows in set (0.00 sec)

I/O线程创建的连接(master)

mysql> show processlist \G

*************************** 1. row

***************************

Id: 1

User: root

Host: localhost

db: NULL

Command: Query

Time: 0

State: init

Info: show processlist

*************************** 2. row

***************************

Id: 2

User: replication

Host: 192.168.111.22:37333

db: NULL

Command: Binlog Dump

Time: 377

State: Master has sent all binlog to slave; waiting for binlog to be

updated

Info: NULL

2 rows in set (0.03 sec)