Persiapan
Untuk dapat mencoba melakukan replikasi master to master mysql ini, silakan persiapkan (minimal) 2 server mysql siap pakai, contoh dengan IP 10.2.9.1 dan 10.2.9.2.
Langkah Replikasi Master to Master MySQL
1. Sesuaikan konfigurasi masing-masing server MySQL sebagai master. Ubah pada tiap file
/etc/my.cnf.
Untuk master server 1 misalnya:
[mysqld]
port=3306
datadir=/home/mysql/
socket=/usr/local/mysql/tmp/mysql.sock
user=mysql
old_passwords=0
#symbolic-links=0
#query_cache_size = 268435456
query_cache_size = 256M
query_cache_type=1
query_cache_limit = 1048576
log = 1
long_query_time = 1
slow_query_log = 1
slow_query_log_file = /var/log/mysql/mysql-slow.log
general_log = 1
general_log_file = /var/log/mysqld.log
server_id = 1
log_bin = /var/log/mysql/mysql-bin.log
log_bin_index = /var/log/mysql/mysql-bin.log.index
relay_log = /var/log/mysql/mysql-relay-bin
relay_log_index = /var/log/mysql/mysql-relay-bin.index
expire_logs_days = 10
max_binlog_size = 100M
log_slave_updates = 1
bind-address = 0.0.0.0
local-infile = 0
sedangkan untuk server master 2:
[mysqld]
port=3306
datadir=/home/mysql
socket=/usr/local/mysql/tmp/mysql.sock
user=mysql
old_passwords=0
#symbolic-links=0
query_cache_size = 268435456
query_cache_type=1
query_cache_limit=1048576
log = 1
long_query_time = 1
slow_query_log = 1
slow_query_log_file = /var/log/mysql/mysql-slow.log
general_log = 1
general_log_file = /var/log/mysqld.log
server_id = 2
log_bin = /var/log/mysql/mysql-bin.log
log_bin_index = /var/log/mysql/mysql-bin.log.index
relay_log = /var/log/mysql/mysql-relay-bin
relay_log_index = /var/log/mysql/mysql-relay-bin.index
expire_logs_days = 10
max_binlog_size = 100M
log_slave_updates = 1
bind-address = 0.0.0.0
local-infile = 0
2. Instal replikasi ke masing-masing server, login ke server1 sebagai root.
a. buatlah 3 user untuk keperluan replikasi ini: mysqlchkuser, mmm_monitor, mmm_agent, dan replication.
b. Grant mmm_monitor sebagai client replication.
c. Grant mmm_agent sebagai super dan client replication.
d. Grant replication sebagai slave
e.
flush privileges mysql
f. flush juga read lock mysql
g. cek status master mysql
gambaran langkah-langkah diatas dalam perintah dan respon di console seperti berikut:
mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 36
Server version: 5.5.12-log Source distribution
Copyright (c) 2000, 2010, 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> create user 'mysqlchkuser'@'localhost' identified by 'mysql321';
Query OK, 0 rows affected (0.06 sec)
mysql> create user 'mmm_monitor'@'%' identified by 'monitor_password';
Query OK, 0 rows affected (0.06 sec)
mysql> create user 'mmm_agent'@'%' identified by 'agent_password';
Query OK, 0 rows affected (0.00 sec)
mysql> create user 'replication'@'%' identified by 'replication_password';
Query OK, 0 rows affected (0.00 sec)
mysql> GRANT REPLICATION CLIENT ON *.* TO 'mmm_monitor'@'%' IDENTIFIED BY 'monitor_password';
Query OK, 0 rows affected (0.00 sec)
mysql> GRANT SUPER, REPLICATION CLIENT, PROCESS ON *.* TO 'mmm_agent'@'%' IDENTIFIED BY 'agent_password';
Query OK, 0 rows affected (0.00 sec)
mysql> GRANT REPLICATION SLAVE ON *.* TO 'replication'@'%' IDENTIFIED BY 'replication_password';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
mysql> flush tables with read lock;
Query OK, 0 rows affected (0.00 sec)
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000001 | 1044 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
h. Dump database master server 1 ke master server 2 dengan mysqldump
mysqldump -u root -p --all-databases > /tmp/database-backup.sql
i. Pindah file backup ke master server 2 dengan scp,
scp /tmp/database-backup.sql 10.2.9.2:~/
j. Unlock table di master 1.
3. Login ke master server 2 sebagai root di mysql.
a. flush privileges yang ada.
b. ubah master mysql
dengan master_host = ‘10.2.9.1’ (atau sesuai IP master server 1 anda) berikut dengan port (biasanya 3306), master user (dalam hal ini ‘replication’), password user dan log file mastering nya.
mysql> flush privileges;
Query OK, 0 rows affected (0.46 sec)
mysql> CHANGE MASTER TO master_host='10.2.9.1', master_port=3306, master_user='replication', -> master_password='replication_password', master_log_file='mysql-bin.000001', master_log_pos=1044;
c. jalankan slave pada master server 2 dan cek status slave-nya.
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status \G run command
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.2.9.1
Master_User: replication
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 1044
Relay_Log_File: mysql-relay-bin.000002
Relay_Log_Pos: 253
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: 1044
Relay_Log_Space: 409
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
1 row in set (0.00 sec)
d. cek plu status master-nya
mysql> show master status -> ;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000002 | 27957968 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000002 | 27957968 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
4. Kembali ke master server 1 dan setting master
a. Ubah master mysql dengan master host sesuai IP master server 2, sesuaikan port, user, password dan
file log-nya.
mysql> CHANGE MASTER TO master_host='10.2.9.2', master_port=3306, master_user='replication', -> master_password='replication_password', master_log_file='mysql-bin.000002', master_log_pos=27957968;
Query OK, 0 rows affected (0.34 sec)
b. jalankan slave dan cek statusnya
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G run command
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.2.9.1
Master_User: replication
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000002
Read_Master_Log_Pos: 27957968
Relay_Log_File: mysql-relay-bin.000002
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000002
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: 27957968
Relay_Log_Space: 409
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
1 row in set (0.00 sec)
5. Uji coba replikasi.
a. Pada console master server 1, silakan lihat daftar database
b. Cobalah buat sebuah database baru
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| c4CkV893_B4r7Hue |
| mysql |
| performance_schema |
+--------------------+
4 rows in set (0.00 sec)
mysql> create database contohreplikasi;
Query OK, 1 row affected (0.03 sec)
c. Coba cek di master server 2, harusnya database contohreplikasi otomatis juga dibuatkan.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| c4CkV893_B4r7Hue |
| contohreplikasi |
| mysql |
| performance_schema |
+--------------------+
5 rows in set (0.00 sec)
Sekian. Semoga berhasil dan selamat menikmati replikasi data master to master MySQL.
Referensi:
1. emka.web.id
(//emka.web.id/programming/database/mysql/2012/replikasi-master-to-master-mysql/)
2. MySQL-mmm.org (//mysql-mmm.org/mmm2:guide)
3. ALinux.web.id
(//alinux.web.id/2011/08/16/replicate-master-to-master-mysql.html)