vim /etc/my.cnf

[mysqld]
server-id=51  #標(biāo)識(shí)
log_bin=/var/lib/mysql/mysql_log_bin  #開啟binlog并指定路徑
binlog_format=mixed  #binlog 格式（mixed 兼容 row 和 statement）
log_slave_updates  #開啟主從
auto_increment_increment = 2 #主鍵自增量
auto_increment_offset = 1 #主鍵起始偏量

vim /etc/my.cnf
[mysqld]
server-id=52  #標(biāo)識(shí)
log_bin=/var/lib/mysql/mysql_log_bin  #開啟binlog并指定路徑
binlog_format=mixed  #binlog 格式（mixed 兼容 row 和 statement）
log_slave_updates  #開啟主從
auto_increment_increment = 2 #主鍵自增量
auto_increment_offset = 2 #主鍵起始偏量

[root@host51 ~]# systemctl restart mysqld 

mysql -uroot -p你的密碼

創(chuàng)建連接用戶
mysql> create user 'repl'@'%' identified by '123qqq...A';
Query OK, 0 rows affected (0.00 sec)
授權(quán)連接用戶
mysql>  grant replication slave on *.* to 'repl'@'%';
Query OK, 0 rows affected (0.00 sec)
刷新權(quán)限
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> show master status;
+----------------------+----------+--------------+------------------+-------------------+
| File                 | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+----------------------+----------+--------------+------------------+-------------------+
| mysql_log_bin.000004 |     1007 |              |                  |                   |
+----------------------+----------+--------------+------------------+-------------------+
1 row in set (0.01 sec)

mysql> show master status
    -> ;
+----------------------+----------+--------------+------------------+-------------------+
| File                 | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+----------------------+----------+--------------+------------------+-------------------+
| mysql_log_bin.000004 |     1007 |              |                  |                   |
+----------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

mysql> change master to
master_host='192.168.4.52', #設(shè)置主的IP地址
master_user='repl', #設(shè)置連接用戶名
master_password='123qqq...A', #設(shè)置連接用戶密碼
master_log_file='mysql_log_bin.000004', #設(shè)置binlog文件名
master_log_pos=1007; #設(shè)置binlog 同步位置
Query OK, 0 rows affected, 2 warnings (0.00 sec)

mysql> change master to 
master_host='192.168.4.51',
master_user='repl',
master_password='123qqq...A',
master_log_file='mysql_log_bin.000004',
master_log_pos=1007;
Query OK, 0 rows affected, 2 warnings (0.01 sec)

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: 192.168.4.52
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql_log_bin.000004
          Read_Master_Log_Pos: 1007
               Relay_Log_File: host51-relay-bin.000003
                Relay_Log_Pos: 324
        Relay_Master_Log_File: mysql_log_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: 1007
              Relay_Log_Space: 702
              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: 52
                  Master_UUID: 888f4a92-acd3-11f0-8b2a-000c29a32fbd
             Master_Info_File: /var/lib/mysql/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           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
         Replicate_Rewrite_DB: 
                 Channel_Name: 
           Master_TLS_Version: 
1 row in set (0.00 sec)

mysql> create database db1;
Query OK, 1 row affected (0.00 sec)

mysql> create table db1.user(id int  primary key auto_increments);
Query OK, 0 rows affected (0.01 sec)

mysql> insert into db1.user values(1);
Query OK, 1 row affected (0.00 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| db1                |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
5 rows in set (0.00 sec)

mysql> select * from db1.user;
+------+
| id   |
+------+
|  1   |
+------+
1 row in set (0.00 sec)

mysql> create database db2;
Query OK, 1 row affected (0.00 sec)

mysql> create table db2.user(id int  primary key auto_increments);
Query OK, 0 rows affected (0.01 sec)

mysql> insert into db2.user values(2);
Query OK, 1 row affected (0.00 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| db1                |
| db2                |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
6 rows in set (0.00 sec)

mysql> select * from db2.user;
+------+
| id   |
+------+
|  2   |
+------+
1 row in set (0.00 sec)