mysql主从配置
接前文 https://www.cnblogs.com/wscsq789/p/12262969.html，这里配置主从库同步配置
主库配置：
[root@guangzhou my.cnf.d]# pwd /etc/my.cnf.d #新增同步配置 [root@guangzhou my.cnf.d]# vim server.cnf [mysqld] binlog-ignore-db=mysql binlog-ignore-db=information_schema log-bin=mysql-bin binlog_format=mixed server-id=1 datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 #导出所有数据库数据，一会需要再从库导入 [root@guangzhou my.cnf.d]# mysqldump -uroot -p --all-databases > ~/sync_dump_all.sql #重启mariadb服务 [root@guangzhou my.cnf.d]# systemctl restart mariadb
[root@guangzhou my.cnf.d]# mysql -h 127.0.0.1 -u root -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 16 Server version: 10.2.31-MariaDB-log MariaDB Server Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. #新增同步用户 MariaDB [(none)]> create user 'sync_user'@'%' identified by '666'; #从库账号授权 MariaDB [(none)]> grant replication slave on *.* to 'sync_user'@'%'; #检查新建的账号 MariaDB [(none)]> select user,host from mysql.user; #检查账号授权 MariaDB [(none)]> show grants for sync_user@'%'; #打印主库状态 MariaDB [(none)]> show master status\G; *************************** 1. row *************************** File: mysql-bin.000001 Position: 831 Binlog_Do_DB: Binlog_Ignore_DB: mysql,information_schema 1 row in set (0.00 sec) ERROR: No query specified
从库配置:
[root@VM_0_11_centos my.cnf.d]# pwd /etc/my.cnf.d #新增配置 [root@VM_0_11_centos my.cnf.d]# vim server.cnf [mysqld] server-id=3 read-only=true #重启mariadb [root@VM_0_11_centos my.cnf.d]# systemctl restart mariadb [root@VM_0_11_centos my.cnf.d]# mysql -h 127.0.0.1 -u root -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 11 Server version: 10.2.31-MariaDB MariaDB Server Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. #设置同步配置,此处master_log_file需要和主库配置项log-bin保持一致 MariaDB [(none)]> change master to master_host='172.16.0.15',master_user='sync_user',
master_password='123456', master_log_file='mysql-bin.000001', master_log_pos=831; #启动从库 MariaDB [(none)]> start slave; Query OK, 0 rows affected (0.00 sec)
#Slave_IO_Running: 复制master主机binlog日志文件里的sql到本机的relay-log文件里
#Slave_SQL_Running: 读取I/O线程写入的relay log。并且根据relay log的内容对slave数据库做相应的操作
#Slave_IO_Running和Slave_SQL_Running均为Yes说明设置成功
MariaDB [(none)]> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event Master_Host: 172.16.0.15
Master_User: sync_user Master_Port: 3306 Connect_Retry: 60
Master_Log_File: mysql-bin.000001 Read_Master_Log_Pos: 831
Relay_Log_File: VM_0_11_centos-relay-bin.000005
Relay_Log_Pos: 555
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: 831
Relay_Log_Space: 1172
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_SSL_Crl:
Master_SSL_Crlpath:
Using_Gtid:
No Gtid_IO_Pos:
Replicate_Do_Domain_Ids:
Replicate_Ignore_Domain_Ids:
Parallel_Mode: conservative
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log;
waiting for the slave I/O thread to update it 1 row in set (0.00 sec) ERROR: No query specified
完成上面配置后，同时开两个窗口分别连接主从库服务器，做增删改前选择test库做下对比：
主库新增测试表：
从库：
主库录入几条测试数据：
再看下从库：
目前看下来数据已经同步成功了，并且可以知道的是从库牵涉到连个线程，一个是io读取，一个是sql写入
