Mysql Server-1,Server-2,Server-3 is running as Galera and server-2 is slave.

Mysql Server-4 is master.

my.cnf file master side is :

[MYSQLD] binlog-format=ROW log-bin=binlog server-id=1 

and also master side:

CREATE USER 'rep'@'ip slave' IDENTIFIED BY 'pass'; GRANT REPLICATION SLAVE ON *.* TO 'rep'@'ip slave'; FLUSH PRIVILEGES; 

and my.cnf file Slave side is :

[MYSQLD] binlog-format=ROW log-bin=binlog server-id=2 

and also slave side:

CHANGE MASTER TO MASTER_HOST='ip master',MASTER_USER='rep', MASTER_PASSWORD='pass', MASTER_LOG_FILE='binlog.000003';   MariaDB [(none)]> SHOW SLAVE STATUS \G; *************************** 1. row ***************************                Slave_IO_State: Waiting for master to send event                   Master_Host: 192.168.231.102                   Master_User: repp                   Master_Port: 3306                 Connect_Retry: 60               Master_Log_File: binlog.000014           Read_Master_Log_Pos: 3728                Relay_Log_File: db2-relay-bin.000017                 Relay_Log_Pos: 552         Relay_Master_Log_File: binlog.000014              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: 3728               Relay_Log_Space: 1155               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) 

When the cluster(slave) and master are up, sync doesn’t problem and working. but when all servers (galera) is down and we changed databases on slave server then power on again Galera servers, Changes do not apply. What settings should be made to r-sync automatically? please Step by step explain what to do?