Mysql database replication is very important issue for disaster recovery. So you can configure step by step multiple database replication on Ubuntu 16.04. I am ready to help some tutorial for you. Please make sure that, your server must be ssh enable without password authentication.
★ How To Install Mysql Server on Ubuntu 14.04
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Install mysql server for both ubuntu 16.04 server.
root@Master-Serv:~# apt -y install mysql-server
Mysql master slave replication on ubuntu 16.04 prerequisite
- Must be enable ssh authentication without password
- Must be ufw and any firewall disable for two server
- Must be comment out the below lines master and slave server
Master Server IP : 10.66.100.20
Slave Server IP : 10.66.100.21
root@Master-Serv:~# vi /etc/mysql/mysql.conf.d/mysqld.cnf root@Slave-Serv:~# vi /etc/mysql/mysql.conf.d/mysqld.cnf
Must be comment below line.
#bind-address = 127.0.0.1 #skip-networking [If exit or not]
Master Server configuration on ubuntu 16.04
Step #01: Open my.cnf file then insert server id, relay log and log bin file location.
root@Master-Serv:~# vi /etc/mysql/mysql.conf.d/mysqld.cnf
Insert below all lines
[mysqld] server-id= 1 relay-log=/var/log/mysql/mysql-relay-bin.log log-bin=/var/log/mysql/mysql-bin.log
now mysql restart command
root@Master-Serv:~# service mysql restart
Step #02: Create replication user with grant privileges.
root@Master-Serv:~# mysql -u root -p
Then type mysql root password
mysql> CREATE database test_db; mysql> CREATE USER 'replica'@'%' IDENTIFIED BY 'passw0rd'; mysql> GRANT ALL PRIVILEGES ON *.* TO 'replica'@'%'; mysql> FLUSH PRIVILEGES; mysql> SHOW MASTER STATUS; +------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------+ | mysql-bin.000160 | 35117 | | | | +------------------+----------+--------------+------------------+-------------------+ 1 row in set (0.00 sec) mysql> FLUSH TABLES WITH READ LOCK;
Step #03: Open another terminal for backup all master database.
root@Master-Serv:~# mysqldump -u root -p --all-databases --master-data > masterdb.sql
Copy masterdb.sql file into slave server
root@Master-Serv:~# scp masterdb.sql root@slave-server-ip:/root/
Slave Server configuration on ubuntu 16.04
root@Slave-Serv:~# vi /etc/mysql/mysql.conf.d/mysqld.cnf
Insert below all lines
[mysqld] server-id= 2 relay-log=/var/log/mysql/mysql-relay-bin.log log-bin=/var/log/mysql/mysql-bin.log
now mysql restart command
root@Slave-Serv:~# service mysql restart Step #04: Now database import into slave server.
root@Slave-Serv:~# mysql -u root -p < masterdb.sql
Type your slave server root password. Wait at lest few minutes.
Goto mysql terminal command below:
root@Slave-Serv:~# mysql -u root -p
Again type your slave server root password.
mysql> stop slave; mysql> change master to master_host='master-server-ip', master_user='replica', master_password='replica-user-password', master_log_file='file-value-from-master', master_log_pos=log-position_from-master; mysql> start slave;
Step #05: Goto master terminal when first time login then unlock tables command below.
mysql> UNLOCK TABLES;
Step #06: Now check master slave replication status.
Goto slave server mysql terminal then run below command.
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Connecting to master
Master_Host: 10.66.100.20
Master_User: replica
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000160
Read_Master_Log_Pos: 153024467
Relay_Log_File: mysql-relay-bin.000020
Relay_Log_Pos: 4
Relay_Master_Log_File: mysql-bin.000160
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: 35117
Relay_Log_Space: 154
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: 2003
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 0
Master_UUID: c8d666a2-ff5e-11e7-9e40-eebc113755c2
Master_Info_File: /var/lib/mysql/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp: 180417 11:54:56
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
ERROR:
No query specified
Step#07: Replication test create table and then goto slave server.
Goto master server mysql terminal
mysql> use test_db; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> create table test (c int); Query OK, 0 rows affected (0.60 sec) mysql> show tables; +----------------------+ | Tables_in_test | +----------------------+ test +----------------------+ 1 rows in set (0.00 sec)
Now goto slave server mysql terminal
mysql> use test_db; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> show tables; +----------------------+ | Tables_in_test | +----------------------+ test +----------------------+ 1 rows in set (0.00 sec)
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