MariaDB Replication : Master-Slave

마스터서버에서 복제 전용 계정을 새로 추가 or 기존 계정에 복제 관련 권한을 추가

GRANT REPLICATION SLAVE ON *.* TO ‘userid’@’%’ IDENTIFIED BY ‘비밀번호’;

FLUSH PRIVILEGES;

마스터, 슬레이브에서 replication 할 db 의 데이터를 맞춤


Master server 설정

# vi /etc/my.cnf.d/server.cnf

[mariadb] log_bin=mysql-bin server-id=1

# systemctl restart mariadb

 

MariaDB [(none)]> show master status;

MariaDB [(none)]> show master status;

file : mysql-bin.000001

positon : 328

​꼭 기억 !!!

 

 #server id 1로 되어있는지 확인

SHOW GLOBAL VARIABLES LIKE 'server_id';

 show variables like '%log_bin%';

 

 Slave 서버 설정

SHOW GLOBAL VARIABLES LIKE 'server_id';

처음엔 1로 되어있음

 # vi /etc/my.cnf.d/server.cnf

[mysqld] log_bin=mysql-bin server-id=2 relay_log=mysql-relay-bin log_slave_updates=1 read_only=1 # replicate-do-db='repl'  ==> 하나의 db 만 replication 할 때. 없으면 모든 db 를 replication 함. # 몇몇개의 db 만 replication 할 경우 replicate-do-db 항목을 여러개 추가

# systemctl restart mariadb

확인

SHOW GLOBAL VARIABLES LIKE 'server_id';

SET GLOBAL server_id=2;

 

 

Slave 접속해서 동기화 받을 DB가 존재하는 Master 서버의 정보를 입력

 

​MariaDB [(none)]> STOP SLAVE;

 

MariaDB [(none)]> CHANGE MASTER TO MASTER_HOST='192.168.2.175', MASTER_PORT=23306, MASTER_USER='kpis', MASTER_PASSWORD='kpis2302131!', MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=328;

 

MariaDB [(none)]> START SLAVE;

 

 

Slave가 Master에게서 제대로 동기화 받아오는지 확인

MariaDB [(none)]> SHOW SLAVE STATUS \G;

*************************** 1. row ***************************                 Slave_IO_State: Waiting for master to send event                    Master_Host: 192.168.2.175                    Master_User: kpis                    Master_Port: 23306                  Connect_Retry: 60                Master_Log_File: mysql-bin.000001            Read_Master_Log_Pos: 328                 Relay_Log_File: mysql-relay-bin.000002                  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: 328                Relay_Log_Space: 864                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               Slave_DDL_Groups: 0 Slave_Non_Transactional_Groups: 0     Slave_Transactional_Groups: 0 1 row in set (0.000 sec)   ERROR: No query specified

 

정상

Slave_IO_State:Waiting for master to send event

Slave_I/O_Running: Yes

Slave_SQL_Running: Yes

 

 

MariaDB [(none)]> SHOW SLAVE STATUS \G;

 

에러 체크

Last_IO_Errno

Last_IO_Error

Last_SQL_Errno

Last_SQL_Error

 

 

최종 확인 : insert/update/delete