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MariaDB 10.2 : Replication
2017/10/30 |
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Configure MariaDB Replication settings. This configuration is general Master-Slave settings.
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| [1] | Change settings and create a user for replication on MariaDB Matser Host. |
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[root@www ~]#
vi /etc/opt/rh/rh-mariadb102/my.cnf.d/mariadb-server.cnf
[server]
# add follows in [server] section : get binary logs log-bin=mysql-bin # define uniq server ID server-id=101
[root@www ~]#
[root@www ~]# systemctl restart rh-mariadb102-mariadb
mysql -u root -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 9 Server version: 10.2.8-MariaDB-log MariaDB Server Copyright (c) 2000, 2017, 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)]>
MariaDB [(none)]> flush privileges; Query OK, 0 rows affected (0.00 sec) exit Bye |
| [2] | |
| [3] |
If Firewalld is running on Master Host,
allow service like follows. But if Slave Host has also read accesses from other Clients, allow service on Slave Host, too, like follows.
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| [4] | Change settings on Slave Host. |
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[root@node01 ~]#
vi /etc/opt/rh/rh-mariadb102/my.cnf.d/mariadb-server.cnf
[server]
[root@node01 ~]# # add follows in [server] 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 systemctl restart rh-mariadb102-mariadb
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| [5] | Get Dump-Data on Master Host. |
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[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: 10.2.8-MariaDB-log MariaDB Server Copyright (c) 2000, 2017, 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 (0.00 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 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% 466KB 51.0MB/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. |
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# 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 11 Server version: 10.2.8-MariaDB-log MariaDB Server Copyright (c) 2000, 2017, 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 (0.15 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
1 row in set (0.00 sec)
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