CentOS 7
Ads

MySQL 5.7 : Replication Settings
2017/01/17
 
Configure MySQL Replication settings. This configuration is general Master-Slave settings.
[1] Change settings and create a user for replication on MySQL Matser Host.
[root@www ~]#
vi /etc/opt/rh/rh-mysql57/my.cnf.d/rh-mysql57-mysql-server.cnf
[mysqld]
# add follows in [mysqld] section : get binary logs

log-bin=mysql-bin
# define uniq server ID

server-id=101
[root@www ~]#
systemctl restart rh-mysql57-mysqld

[root@www ~]#
mysql -u root -p

Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.16-log MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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.

# create user (set any password for 'password' section)

mysql>
grant replication slave on *.* to replica@'%' identified by 'password';

Query OK, 0 rows affected (0.00 sec)
mysql>
flush privileges;

Query OK, 0 rows affected (0.00 sec)
mysql>
exit

Bye
[2]
[3] If Firewalld is running on Master Host, allow service like follows.
But if Slave Host has also read accesses, allow service on Slave Host, too, like follows.
[root@www ~]#
firewall-cmd --add-service=mysql --permanent

success
[root@www ~]#
firewall-cmd --reload

success
[4] Change settings on Slave Host.
[root@node01 ~]#
vi /etc/opt/rh/rh-mysql57/my.cnf.d/rh-mysql57-mysql-server.cnf
[mysqld]
# add follows in [mysqld] section : get binary logs

log-bin=mysql-bin
# define server ID (different one from Master Host)

server-id=102
# read only

read_only=1
# define own hostname

report-host=node01.srv.world
[root@node01 ~]#
systemctl restart rh-mysql57-mysqld

[5] Get Dump-Data on Master Host.
[root@www ~]#
mysql -u root -p

Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.16-log MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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.

# lock all tables

mysql>
flush tables with read lock;

Query OK, 0 rows affected (0.00 sec)
# show status (remember File, Position value)

mysql>
show master status;

+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 |      592 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

# remain the window above and open the another window and execute dump

[root@www ~]#
mysqldump -u root -p --all-databases --lock-all-tables --events > mysql_dump.sql

Enter password:
# back to the remained window and unlock

mysql>
unlock tables;

Query OK, 0 rows affected (0.00 sec)
mysql>
exit

Bye
# transfer the dump to Slave Host

[root@www ~]#
scp mysql_dump.sql node01.srv.world:/tmp/

root@node01.srv.world's password:
mysql_dump.sql 100% 515KB 514.7KB/s 00:00
[6] Configure replication settings on Slave Host.
It's OK all, make sure the settings work normally to create databases on Master Host.
# import dump data sent from Master Host

[root@node01 ~]#
mysql -u root -p < /tmp/mysql_dump.sql

Enter password:
[root@node01 ~]#
mysql -u root -p

Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.7.16-log MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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>
change master to

    ->
master_host='10.0.0.31',
   
# Master Hosts's IP

    ->
master_user='replica',
   
# replication ID

    ->
master_password='password',
   
# replication ID's password

    ->
master_log_file='mysql-bin.000001',
   
# File value confirmed on Master

    ->
master_log_pos=592;
   
# Position value confirmed on Master

Query OK, 0 rows affected (0.58 sec)
# start replication

mysql>
start slave;

Query OK, 0 rows affected (0.00 sec)
# show status

mysql>
show slave status\G

*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.0.0.31
                  Master_User: replica
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 732
               Relay_Log_File: node01-relay-bin.000002
                Relay_Log_Pos: 460
        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: 732
              Relay_Log_Space: 668
              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: 101
                  Master_UUID: 2568c042-dd31-11e6-8f68-5254003d02ad
             Master_Info_File: /var/opt/rh/rh-mysql57/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:
     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)
 
Tweet