[mysqld]
log_bin
log_slave_updates
gtid_strict_mode
server_id=1
 [galera]
wsrep_gtid_mode

[mysqld]
binlog_format=ROW
log_bin
log_slave_updates
server_id=2
gtid_strict_mode

stop slave; change master to master_host='one galera node name ',master_port=3306,master_user='repl_user',master_password='repl_password',master_use_gtid=current_pos; start slave;