mysql master or master copy

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