MariaDB 10.11 : Replication2024/05/17 |
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Configure MariaDB Replication. This is the general Primary/Replica setting.
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| [2] | Change settings and create a user for replication on MariaDB Primary Host. |
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root@www:~#
vi /etc/mysql/mariadb.conf.d/50-server.cnf # line 27 : change to IP of this host bind-address = 10.0.0.31
# line 73 : uncomment and change to any another ID server-id = 101
# line 74 : uncomment log_bin = /var/log/mysql/mysql-bin.log
root@www:~#
root@www:~# mkdir /var/log/mysql root@www:~# chown mysql:mysql /var/log/mysql root@www:~# systemctl restart mariadb
mysql Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 36 Server version: 10.11.7-MariaDB-2ubuntu2 Ubuntu 24.04 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 |
| [3] | Change settings on Replica Host. |
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root@node01:~#
vi /etc/mysql/mariadb.conf.d/50-server.cnf # line 27 : change to IP of this host bind-address = 10.0.0.51 # line 73 : uncomment and change to another ID (different one from Primary Host) server-id = 102 # line 74 : uncomment log_bin = /var/log/mysql/mysql-bin.log # line 77 : add # read only read_only=1 # specify this hostname report-host=node01.srv.worldroot@node01:~# mkdir /var/log/mysql root@node01:~# chown mysql:mysql /var/log/mysql root@node01:~# systemctl restart mariadb
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| [4] | Get Dump-Data on Primary Primary Host. After getting Data, transfer it to Replica Hosts with [sftp] or [rsync] and so on. |
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# create a directory and get Backup Data root@www:~# mkdir /home/mariadb_backup root@www:~# mariabackup --backup --target-dir /home/mariadb_backup -u root ..... ..... [00] 2024-05-17 01:05:29 Writing backup-my.cnf [00] 2024-05-17 01:05:29 ...done [00] 2024-05-17 01:05:29 Writing xtrabackup_info [00] 2024-05-17 01:05:29 ...done [00] 2024-05-17 01:05:29 Redo log (from LSN 49855 to 49871) was copied. [00] 2024-05-17 01:05:29 completed OK! |
| [5] | On Replica Host, Copy back Backup Data of Primary Host and Configure replication settings. After starting replication, verify replication works normally to create test database or insert test data and so on. |
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# stop MariaDB and remove existing data root@node01:~# systemctl stop mariadb root@node01:~# rm -rf /var/lib/mysql/*
# transferred backup data root@node01:~# ll mariadb_backup.tar.gz -rw-r--r-- 1 root root 700492 May 17 01:06 mariadb_backup.tar.gz root@node01:~# tar zxvf mariadb_backup.tar.gz # run prepare task before restore task (OK if [completed OK]) root@node01:~# mariabackup --prepare --target-dir /root/mariadb_backup ..... ..... 2024-05-17 1:07:56 0 [Note] InnoDB: Initializing buffer pool, total size = 100.000MiB, chunk size = 100.000MiB 2024-05-17 1:07:56 0 [Note] InnoDB: Completed initialization of buffer pool 2024-05-17 1:07:56 0 [Note] InnoDB: Buffered log writes (block size=512 bytes) 2024-05-17 1:07:56 0 [Note] InnoDB: End of log at LSN=49871 [00] 2024-05-17 01:07:56 Last binlog file , position 0 [00] 2024-05-17 01:07:56 completed OK! # run restore root@node01:~# mariabackup --copy-back --target-dir /root/mariadb_backup ..... ..... [01] 2024-05-17 01:09:08 Copying ./mysql/proc.MAI to /var/lib/mysql/mysql/proc.MAI [01] 2024-05-17 01:09:08 ...done [01] 2024-05-17 01:09:08 Copying ./mysql/table_stats.frm to /var/lib/mysql/mysql/table_stats.frm [01] 2024-05-17 01:09:08 ...done [00] 2024-05-17 01:09:08 completed OK! # confirm [File] and [Position] value of logs of primary host root@node01:~# cat /root/mariadb_backup/xtrabackup_binlog_info mysql-bin.000001 328 # set replication root@node01:~# mysql Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 44 Server version: 10.11.7-MariaDB-2ubuntu2-log Ubuntu 24.04 Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. # master_host = Primary Host IP address # master_user = replication user ID # master_password = replication user ID password # master_log_file = [File] value confirmed above # master_log_pos = [Position] value confirmed above MariaDB [(none)]> change master to master_host='10.0.0.31', master_user='replica', master_password='password', master_log_file='mysql-bin.000001', master_log_pos=328; Query OK, 0 rows affected (0.295 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: 328 Relay_Log_File: mysqld-relay-bin.000002 Relay_Log_Pos: 555 Relay_Master_Log_File: mysql-bin.000001 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Rewrite_DB: 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: 328 Relay_Log_Space: 865 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: optimistic SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates Slave_DDL_Groups: 0 Slave_Non_Transactional_Groups: 0 Slave_Transactional_Groups: 0 1 row in set (0.000 sec) |
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