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MariaDB : Replication2019/05/13

 
Configure MariaDB Replication settings. This configuration is general Master-Slave settings.
[1] Change settings and create a user for replication on MariaDB Matser Host.
[root@www ~]#
vi /etc/my.cnf.d/mariadb-server.cnf
[mysqld]
# add follows in [mysqld] section : get binary logs

log-bin=mysql-bin
# define server ID

server-id=101
[root@www ~]#
systemctl restart mariadb

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

Enter password:
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 9
Server version: 10.3.12-MariaDB-log MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

# create user (set any password for 'password' section)
MariaDB [(none)]> grant replication slave on *.* to replica@'%' identified by 'password'; 
Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> flush privileges; 
Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> exit
Bye
[2] If Firewalld is running on Master Host, allow service like follows.
If you connect to read Slave Host, too, allow service on Slave Host, too.
[root@www ~]#
firewall-cmd --add-service=mysql --permanent

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

success
[3]
[4] Change settings on MariaDB Slave Host.
[root@node01 ~]#
vi /etc/my.cnf.d/mariadb-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 mariadb

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

Enter password:
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 10
Server version: 10.3.12-MariaDB-log MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

# lock all tables
MariaDB [(none)]> flush tables with read lock; 
Query OK, 0 rows affected (0.00 sec)
# show status (remember File, Position value) MariaDB [(none)]> show master status; +------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +------------------+----------+--------------+------------------+ | mysql-bin.000001 | 640 | | | +------------------+----------+--------------+------------------+ 1 row in set (0.000 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

MariaDB [(none)]>
unlock tables;

Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]>
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% 467KB 74.6MB/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 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 MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 10
Server version: 10.3.12-MariaDB-log MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> 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=640;           # Position value confirmed on Master
Query OK, 0 rows affected (0.58 sec)

# start replication
MariaDB [(none)]> start slave;
Query OK, 0 rows affected (0.00 sec)

# show status
MariaDB [(none)]> 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: 640
                Relay_Log_File: mariadb-relay-bin.000002
                 Relay_Log_Pos: 555
         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: 640
               Relay_Log_Space: 866
               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_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
              Slave_DDL_Groups: 0
Slave_Non_Transactional_Groups: 0
    Slave_Transactional_Groups: 0
1 row in set (0.000 sec)
Matched Content