双主复制：
在两台server配置my.cnf
[root@localhost mysql]# egrep -v "^$|^#" /etc/my.cnf
datadir = /mydata/data
skip_name_resolve = ON
innodb_file_per_table = ON
relay-log = relay-log
auto-increment-offset = 1 表示自增长字段从那个数开始，他的取值范围是1 .. 65535
auto-increment-increment = 2 表示自增长字段每次递增的量，其默认值是1，取值范围是1 .. 65535
log-bin=mysql-bin
binlog_format=mixed
server-id = 1
两台server配置文件几乎一样，只需要指定auto-increment-offset = 1为偶数或者奇数；
在每台server创建可复制的用户和密码如下：
在192.168.8.200创建用户：
MariaDB [(none)]> grant replication slave,replication client ON *.* to 'glq'@'192.168.%.%' identified by '123123';
Query OK, 0 rows affected (0.01 sec)
MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> show master logs;
+------------------+-----------+
| Log_name | File_size |
+------------------+-----------+
| mysql-bin.000001 | 245 |
| mysql-bin.000002 | 28799 |
| mysql-bin.000003 | 1069459 |
| mysql-bin.000004 | 500 |
+------------------+-----------+
4 rows in set (0.00 sec)
MariaDB [(none)]> change master to master_host='192.168.8.201',master_user='glq1',master_password='123123',master_log_file='mysql-bin.000004',master_log_pos=501;
Query OK, 0 rows affected (0.07 sec)
MariaDB [(none)]> slave start
-> ;
Query OK, 0 rows affected (0.07 sec)
MariaDB [(none)]> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.8.201
Master_User: glq1
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 593
Relay_Log_File: relay-log.000002
Relay_Log_Pos: 621
Relay_Master_Log_File: mysql-bin.000004
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: 593
Relay_Log_Space: 909
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: 2
1 row in set (0.00 sec)
在192.168.8.201创建用户：
MariaDB [(none)]> grant replication slave,replication client on *.* to 'glq1'@'192.168.%.%' identified by '123123';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> show binary logs;
+------------------+-----------+
| Log_name | File_size |
+------------------+-----------+
| mysql-bin.000001 | 245 |
| mysql-bin.000002 | 28799 |
| mysql-bin.000003 | 1069459 |
| mysql-bin.000004 | 501 |
+------------------+-----------+
4 rows in set (0.00 sec)
MariaDB [(none)]> change master to master_host='192.168.8.200',master_user='glq',master_password='123123',master_log_file='mysql-bin.000004',master_log_pos=500;
Query OK, 0 rows affected (0.09 sec)
MariaDB [(none)]> start slave;
Query OK, 0 rows affected (0.01 sec)
MariaDB [(none)]> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.8.200
Master_User: glq
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 500
Relay_Log_File: relay-log.000002
Relay_Log_Pos: 529
Relay_Master_Log_File: mysql-bin.000004
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: 500
Relay_Log_Space: 817
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
1 row in set (0.00 sec)
测试：
MariaDB [(none)]> create database mydata; //创建数据库；
Query OK, 1 row affected (0.00 sec)
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mydata |
| mysql |
| performance_schema |
| test |
| testdb |
+--------------------+
6 rows in set (0.00 sec)
MariaDB [(none)]> use mydata;
Database changed
MariaDB [mydata]> show tables;
+------------------+
| Tables_in_mydata |
+------------------+
| test |
+------------------+
1 row in set (0.00 sec)
MariaDB [mydata]> desc test;
+--------+---------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------+---------------------+------+-----+---------+----------------+
| id | tinyint(3) unsigned | NO | PRI | NULL | auto_increment |
| name | varchar(20) | NO | | NULL | |
| CardID | varchar(20) | YES | | NULL | |
+--------+---------------------+------+-----+---------+----------------+
3 rows in set (0.07 sec)
MariaDB [mydata]> insert into test(name,CardID)values('glq',1231223),('zyn',123123321);
Query OK, 2 rows affected (0.01 sec)
Records: 2 Duplicates: 0 Warnings: 0
在200 server查看验证：
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mydata |
| mysql |
| performance_schema |
| test |
| testdb |
+--------------------+
6 rows in set (0.00 sec)
MariaDB [(none)]> use mydata;
Database changed
MariaDB [mydata]> create table test(id TINYINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,name varchar(20) not null,CardID varchar(20));
Query OK, 0 rows affected (0.06 sec)
MariaDB [mydata]> select * from test;
+----+------+-----------+
| id | name | CardID |
+----+------+-----------+
| 2 | glq | 1231223 |
| 4 | zyn | 123123321 |
+----+------+-----------+
2 rows in set (0.00 sec)
至此主主复制配置完成
