本文共 3834 字，大约阅读时间需要 12 分钟。
| 主机名 | os | IP | 环境 |
| master | centos7.3 | 192.168.182.142 | mysql5.7.23 |
| slave | centos7.3 | 192.168.182.143 | mysql5.7.23 |
1）vim /etc/my.cnf
[mysqld]
user = mysql port = 3306 server-id = 1 log_bin = mysql-bin basedir = /usr/local/mysql datadir = /usr/local/mysql/data socket = /usr/local/mysql/mysql.sock log-error = /usr/local/mysql/data/mysql.err pid-file = /usr/local/mysql/data/mysqld.pid [client] socket = /usr/local/mysql/mysql.sock2)配置防火墙
[root@localhost ~]# firewall-cmd --permanent --add-port=3306/tcp success [root@localhost ~]# firewall-cmd --reload success1）vim /etc/my.cnf
[mysqld]
user = mysql port = 3306 server-id = 1 basedir = /usr/local/mysql datadir = /usr/local/mysql/data socket = /usr/local/mysql/mysql.sock log-error = /usr/local/mysql/data/mysql.err pid-file = /usr/local/mysql/data/mysqld.pid [client] socket = /usr/local/mysql/mysql.sock2)配置防火墙
[root@localhost ~]# firewall-cmd --permanent --add-port=3306/tcp success [root@localhost ~]# firewall-cmd --reload successmysql> create user 'zm'@'192.168.182.143' identified by '123.com';
Query OK, 0 rows affected (0.30 sec)mysql> grant replication slave on *.* to 'zm'@'192.168.182.143';
Query OK, 0 rows affected (0.01 sec)mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------+ | mysql-bin.000002 | 771 | | | | +------------------+----------+--------------+------------------+-------------------+ 1 row in set (0.00 sec) 注：到这就不要在对master进行操作了。切记哦mysql> change master to master_host='192.168.182.142',master_user='zm',master_password='123.com',master_log_file='mysql-bin.000002',master_log_pos=771;
Query OK, 0 rows affected, 2 warnings (0.03 sec)mysql> start slave;
Query OK, 0 rows affected (0.01 sec) mysql> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.182.142 Master_User: zm Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000002 Read_Master_Log_Pos: 771 Relay_Log_File: localhost-relay-bin.000004 Relay_Log_Pos: 320 Relay_Master_Log_File: mysql-bin.000002 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: 771 Relay_Log_Space: 531 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 Master_UUID: 42dd9fee-e97a-11e8-86b6-000c29e9be7d 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 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) 注：io和sql的状态为yes就可以了，到这简单的主从复制就OK了。1）在master创建一个库
mysql> create database dbtest;
Query OK, 1 row affected (0.00 sec）2）在slave查看有没有在master上所创建的库
mysql> show databases;
+--------------------+ | Database | +--------------------+ | information_schema | | dbtest | | mysql | | performance_schema | | sys | +--------------------+ 5 rows in set (0.13 sec)转载地址：http://xzxvb.baihongyu.com/