MySQL主主複製（雙主複製）配置過程介紹
一、修改配置檔案my.cnf
伺服器A（172.16.16.70）配置如下
server_id = 70
socket = /tmp/mysql.sock
innodb_buffer_pool_size = 10G
character-set-server=utf8
log_bin=mysql-bin
expire_logs_days=3
replicate-do-db=test_sjcj
binlog-ignore-db=mysql,information_schema
auto-increment-increment = 2
auto-increment-offset = 1
伺服器B（172.16.16.71）配置如下:
server_id = 71
socket = /tmp/mysql.sock
innodb_buffer_pool_size = 10G
character-set-server=utf8
log_bin=mysql-bin
expire_logs_days=3
replicate-do-db=test_sjcj
replicate-ignore-db = mysql,information_schema
auto-increment-increment = 2
auto-increment-offset = 2
兩臺伺服器都重啟，使配置生效:
# service mysqld restart
說明:auto-increment-offset是用來設定資料庫中自動增長的起點的，回為這兩臺伺服器都設定了一次自動增長值2，所以它們的起點必須要不同，這樣才能避免兩臺伺服器資料同步時出現主鍵衝突.
replicate-do-db 指定同步的資料庫，本例為test_sjcj庫，另外，建議兩臺伺服器的硬體配置也都一樣。
二、同步資料,建立複製賬號:
在伺服器A（172.16.16.70）上:
mysql> GRANT REPLICATION SLAVE ON *.* TO 'slave'@'172.16.16.71' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
在伺服器B（172.16.16.71）上:
mysql> GRANT REPLICATION SLAVE ON *.* TO 'slave'@'172.16.16.70' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
三、執行change master命令同步:
在伺服器A（172.16.16.70）上:
mysql> show master status;
+------------------+----------+--------------+--------------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+--------------------------+-------------------+
| mysql-bin.000047 | 411 | | mysql,information_schema | |
+------------------+----------+--------------+--------------------------+-------------------+
1 row in set (0.00 sec)
在伺服器B（172.16.16.71）上:
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000003 | 618 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
在伺服器A上執行:
mysql> change master to master_host='172.16.16.71',master_user='slave',master_password='123456',master_log_file='mysql-bin.000003',master_log_pos=618;
Query OK, 0 rows affected, 2 warnings (0.29 sec)
在伺服器B上執行:
mysql> change master to master_host='172.16.16.70',master_user='slave',master_password='123456',master_log_file='mysql-bin.000047',master_log_pos=411;
Query OK, 0 rows affected, 2 warnings (0.34 sec)
在兩伺服器都執行以下命令:
mysql> start slave;
Query OK, 0 rows affected (0.02 sec)
四.檢視狀態:
A伺服器（172.16.16.70）狀態如下：
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.16.16.71
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 618
Relay_Log_File: localhost-relay-bin.000002
Relay_Log_Pos: 283
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: test_sjcj
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: 618
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: 71
Master_UUID: 32197cd9-2957-11e7-a5c4-525400e493a4
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)
B伺服器（172.16.16.71）狀態如下：
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.16.16.70
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000047
Read_Master_Log_Pos: 411
Relay_Log_File: localhost-relay-bin.000002
Relay_Log_Pos: 283
Relay_Master_Log_File: mysql-bin.000047
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: test_sjcj
Replicate_Ignore_DB: mysql,information_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: 411
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: 70
Master_UUID: f1366940-266c-11e7-92c2-525400f39f79
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)
說明已經配置成功了
測試:
在伺服器A(172.16.16.70)上test_sjcj庫裡建立表chenfeng:
mysql> use test_sjcj
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> create table chenfeng (name varchar(10));
Query OK, 0 rows affected (0.23 sec)
mysql> insert into chenfeng values('test');
Query OK, 1 row affected (0.13 sec)
mysql> insert into chenfeng values('liuyb');
Query OK, 1 row affected (0.02 sec)
在伺服器B上檢視伺服器A上建立的表chenfeng
mysql> select * from chenfeng;
+--------+
| name |
+--------+
| test |
| liuyb |
+--------+
2 rows in set (0.00 sec)
mysql> desc chenfeng;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| name | varchar(10) | YES | | NULL | |
+-------+-------------+------+-----+---------+-------+
1 row in set (0.00 sec)
在伺服器B(172.16.16.71)上test_sjcj庫裡建立表test:
mysql> create table test (name varchar(20));
Query OK, 0 rows affected (0.18 sec)
mysql> insert into test values('test');
Query OK, 1 row affected (0.02 sec)
mysql> insert into test values('liuky');
Query OK, 1 row affected (0.03 sec)
在伺服器上A上檢視伺服器B上建立的表test
mysql> select * from test;
+--------+
| name |
+--------+
| test |
| liuky |
+--------+
2 rows in set (0.00 sec)
mysql> desc test;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| name | varchar(20) | YES | | NULL | |
+-------+-------------+------+-----+---------+-------+
1 row in set (0.00 sec)
測試成功，說明MySQL主主複製配置成功.
來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/15498/viewspace-2137928/，如需轉載，請註明出處，否則將追究法律責任。
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