注意是在MySQL主从的基础上做MySQL主主。互为主从。
192.168.10.18上创建一个用户
mysql> grant replication slave on *.* to slave@‘192.168.10.17‘ identified by ‘123456‘;
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> select * from mysql.user where user=‘slave‘\G;
*************************** 1. row ***************************
Host: 192.168.10.17
User: slave
Select_priv: N
Insert_priv: N
Update_priv: N
Delete_priv: N
Create_priv: N
Drop_priv: N
Reload_priv: N
Shutdown_priv: N
Process_priv: N
File_priv: N
Grant_priv: N
References_priv: N
Index_priv: N
Alter_priv: N
Show_db_priv: N
Super_priv: N
Create_tmp_table_priv: N
Lock_tables_priv: N
Execute_priv: N
Repl_slave_priv: Y
Repl_client_priv: N
Create_view_priv: N
Show_view_priv: N
Create_routine_priv: N
Alter_routine_priv: N
Create_user_priv: N
Event_priv: N
Trigger_priv: N
Create_tablespace_priv: N
ssl_type:
ssl_cipher:
x509_issuer:
x509_subject:
max_questions: 0
max_updates: 0
max_connections: 0
max_user_connections: 0
plugin: mysql_native_password
authentication_string: *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9
password_expired: N
password_last_changed: 2020-04-15 11:58:43
password_lifetime: NULL
account_locked: N
1 row in set (0.01 sec)
ERROR:
No query specified
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
修改18上的配置文件并重启
[root@save-1 ~]# /etc/init.d/mysqld restart Shutting down MySQL.... SUCCESS! Starting MySQL.. SUCCESS! [root@save-1 ~]# cat /etc/my.cnf [mysqld] datadir=/usr/local/mysql/data socket=/usr/local/mysql/mysql.sock symbolic-links=0 server-id=2 log-bin=mysql-bin-slave #开启二进制日志 binlog-do-db=test #要复制的库 binlog-ignore-db=mysql #禁止同步的库 [mysqld_safe] log-error=/usr/local/mysql/logs/error.log pid-file=/usr/local/mysql/mysql.pid [client] socket=/usr/local/mysql/mysql.sock
查看日志号
mysql> show master status; +------------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------------+----------+--------------+------------------+-------------------+ | mysql-bin-slave.000001 | 154 | test | mysql | | +------------------------+----------+--------------+------------------+-------------------+ 1 row in set (0.02 sec)
17测试账户
[root@master ~]# mysql -uslave -p123456 -h192.168.10.18 mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 7 Server version: 5.7.18-log MySQL Community Server (GPL) Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement. mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | +--------------------+ 1 row in set (0.01 sec) mysql> quit Bye
开启主从
mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> change master to master_host=‘192.168.10.18‘,master_port=3306,master_user=‘slave‘,master_password=‘123456‘,master_log_file=‘mysql-bin-slave.000001‘,master_log_pos=154;
Query OK, 0 rows affected, 2 warnings (0.14 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: 192.168.10.18
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin-slave.000001
Read_Master_Log_Pos: 154
Relay_Log_File: master-relay-bin.000002
Relay_Log_Pos: 326
Relay_Master_Log_File: mysql-bin-slave.000001
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: 154
Relay_Log_Space: 534
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
Master_UUID: 38509892-7e06-11ea-87d4-000c29cbcf38
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)
查入数据测试
insert into test.emp values (7566, ‘JONES‘, ‘MANAGER‘, 7839, ‘1981-04-02‘, 2975, null, 20); mysql> insert into test.emp values (7521, ‘WARD‘, ‘SALESMAN‘, 7698, ‘1981-02-22‘, 1250, 500, 30); Query OK, 1 row affected (0.10 sec) mysql> select * from emp; +-------+-------+----------+------+---------------------+---------+--------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+----------+------+---------------------+---------+--------+--------+ | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 00:00:00 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 00:00:00 | 1250.00 | 500.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 00:00:00 | 2975.00 | NULL | 20 | +-------+-------+----------+------+---------------------+---------+--------+--------+ 4 rows in set (0.00 sec)