MySQL1：配置mastesr
[root@mysql1 ~]# vim /etc/my.cnf
[root@mysql1 ~]# cat /etc/my.cnf
[mysqld]
datadir=/data/mysql
socket=/data/mysql/mysql.sock
symbolic-links=0
log-bin=mysql-bin
server-id=1
[root@mysql1 ~]# /etc/init.d/mysqld restartShutting down MySQL...... SUCCESS!
Starting MySQL.......................... SUCCESS!
[root@mysql1 ~]# mysql -predhat
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 2
Server version: 5.7.44-log Source distributionCopyright (c) 2000, 2023, Oracle and/or its affiliates.
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> CREATE USER 'repl'@'%' IDENTIFIED BY 'redhat';
Query OK, 0 rows affected (0.22 sec)mysql> GRANT REPLICATION SLAVE ON *.* TO repl@'%';
Query OK, 0 rows affected (0.03 sec)mysql> SHOW MASTER STATUS;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 | 595 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)mysql> EXIT;
Bye
MySQL2：配置salve
[root@mysql2 ~]# /etc/init.d/mysqld restart
Shutting down MySQL.. SUCCESS!
Starting MySQL.. SUCCESS!
[root@mysql2 ~]# mysql -predhat
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 5
Server version: 5.7.44 Source distributionCopyright (c) 2000, 2023, Oracle and/or its affiliates.
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> STOP SLAVE IO_THREAD;
Query OK, 0 rows affected, 1 warning (0.01 sec)mysql> CHANGE MASTER TO
-> MASTER_HOST='172.25.254.6',
-> MASTER_USER='repl',
-> MASTER_PASSWORD='redhat',
-> MASTER_LOG_FILE='mysql-bin.000001',
-> MASTER_LOG_POS=1422;
Query OK, 0 rows affected, 2 warnings (0.08 sec)
mysql> START SLAVE;
Query OK, 0 rows affected (0.02 sec)mysql> START SLAVE IO_THREAD;
Query OK, 0 rows affected, 1 warning (0.01 sec)mysql>
mysql> SHOW SLAVE STATUS\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.25.254.6
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 1422
Relay_Log_File: mysql2-relay-bin.000002
Relay_Log_Pos: 320
Relay_Master_Log_File: mysql-bin.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: 1422
Relay_Log_Space: 528
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: 830992bc-605c-11ef-b0f2-000c29c6c80f
Master_Info_File: /data/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 (0.02 sec)
测试：
mysql1
[root@mysql1 ~]# mysql -predhat
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 3
Server version: 5.7.44-log Source distributionCopyright (c) 2000, 2023, Oracle and/or its affiliates.
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> CREATE DATABASE folian;
Query OK, 1 row affected (0.03 sec)mysql> CREATE TABLE folian.userlist (
-> username varchar(20) not null,
-> password varchar(20) not null
-> );
Query OK, 0 rows affected (1.29 sec)mysql> INSERT INTO folian.userlist VALUE ('folian','123');
Query OK, 1 row affected (0.63 sec)mysql> SELECT * FROM folian.userlist;
+----------+----------+
| username | password |
+----------+----------+
| folian | 123 |
+----------+----------+
1 row in set (0.01 sec)
mysql2
[root@mysql2 ~]# mysql -predhat
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 9
Server version: 5.7.44 Source distributionCopyright (c) 2000, 2023, Oracle and/or its affiliates.
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> SELECT * FROM folian.userlist;
+----------+----------+
| username | password |
+----------+----------+
| folian | 123 |
+----------+----------+
1 row in set (0.02 sec)
遇到的问题：由于第一次配置slave出错了，但是后面修改后，一直报错；
报错：
最后成功解决：
解决方法：
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