MySQL 主主复制

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)