MariaDB 11.8 : レプリケーション2025/11/24 |
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MariaDB レプリケーションの設定です。プライマリー/レプリカ型の冗長構成になります。 |
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| [2] | プライマリーサーバー側で設定を変更し、レプリケーション用のユーザーを作成しておきます。 |
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www:~ #
vi /etc/my.cnf # 15行目 : 変更 bind-address = 0.0.0.0 # 35,36行目 : コメント解除 log_bin=mysql-bin binlog_format=mixed # 44行目 : サーバーID を適当にユニークな値に変更 server-id=101 # 45行目 : GTID ドメイン ID を定義 (適当な整数値) gtid_domain_id=1
www:~ #
www:~ # systemctl restart mariadb mariadb Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 4 Server version: 11.8.3-MariaDB-log MariaDB package Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. # ユーザー作成 : [password] は任意のパスワードを設定 MariaDB [(none)]> grant replication slave on *.* to repl_user@'%' identified by 'password'; Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> exit Bye |
| [3] | レプリカサーバー側の設定をレプリケーション用に変更します。 |
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node01:~ #
vi /etc/my.cnf # 15行目 : 変更 bind-address = 0.0.0.0 # 35,36行目 : コメント解除 log_bin=mysql-bin binlog_format=mixed # 44行目 : サーバーID を適当にユニークな値に変更 server-id=102 # 45行目 : GTID ドメイン ID を定義 (プライマリと同じ値) gtid_domain_id=1 # リードオンリー read_only=1 # ホスト名を設定 report-host=node01.srv.worldnode01:~ # systemctl restart mariadb |
| [4] | プライマリーサーバー側でダンプデータを取得します。 取得したデータは [sftp] なり [rsync] 等を使用して、レプリカサーバー側へ転送しておきます。 |
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# 任意のディレクトリを作成してデータ取得 www:~ # mkdir /home/mariadb_backup www:~ # mariadb-backup --backup --target-dir /home/mariadb_backup -u root ..... ..... [00] 2025-11-24 10:30:54 All tables unlocked [00] 2025-11-24 10:30:54 Backup created in directory '/home/mariadb_backup/' [00] 2025-11-24 10:30:54 MySQL binlog position: filename 'mysql-bin.000001', position '521', GTID of the last change '1-101-1' [00] 2025-11-24 10:30:54 Writing backup-my.cnf [00] 2025-11-24 10:30:54 ...done [00] 2025-11-24 10:30:54 Writing mariadb_backup_info [00] 2025-11-24 10:30:54 ...done [00] 2025-11-24 10:30:54 Redo log (from LSN 50466 to 50482) was copied. [00] 2025-11-24 10:30:54 completed OK! |
| [5] | レプリカサーバー側で、プライマリーサーバー側から転送したダンプデータを展開して、レプリケーションの設定をします。 レプリケーション開始後は、プライマリー側でデータベースを作成する等してレプリケーションが行われていることを確認しておくとよいでしょう。 |
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# 転送したバックアップデータ node01:~ # ll mariadb_backup.tar.gz -rw-r--r--. 1 suse suse 736838 Nov 24 10:31 mariadb_backup.tar.gz node01:~ # tar zxvf mariadb_backup.tar.gz # リストア事前タスク実行 : [completed OK] であれば OK node01:~ # mariadb-backup --prepare --target-dir /root/mariadb_backup mariadb-backup based on MariaDB server 11.8.3-MariaDB Linux (x86_64) [00] 2025-11-24 10:32:49 cd to /root/mariadb_backup/ [00] 2025-11-24 10:32:49 open files limit requested 0, set to 1024 [00] 2025-11-24 10:32:49 This target seems to be not prepared yet. [00] 2025-11-24 10:32:49 mariabackup: using the following InnoDB configuration for recovery: [00] 2025-11-24 10:32:49 innodb_data_home_dir = . [00] 2025-11-24 10:32:49 innodb_data_file_path = ibdata1:12M:autoextend [00] 2025-11-24 10:32:49 innodb_log_group_home_dir = . [00] 2025-11-24 10:32:49 Starting InnoDB instance for recovery. [00] 2025-11-24 10:32:49 mariabackup: Using 100663296 bytes for buffer pool (set by --use-memory parameter) 2025-11-24 10:32:49 0 [Note] InnoDB: Compressed tables use zlib 1.2.13 2025-11-24 10:32:49 0 [Note] InnoDB: Number of transaction pools: 1 2025-11-24 10:32:49 0 [Note] InnoDB: Using AVX512 instructions 2025-11-24 10:32:49 0 [Note] InnoDB: Using Linux native AIO 2025-11-24 10:32:49 0 [Note] InnoDB: innodb_buffer_pool_size_max=96m, innodb_buffer_pool_size=96m 2025-11-24 10:32:49 0 [Note] InnoDB: Completed initialization of buffer pool 2025-11-24 10:32:49 0 [Note] InnoDB: Memory-mapped log (block size=512 bytes) 2025-11-24 10:32:49 0 [Note] InnoDB: End of log at LSN=50482 2025-11-24 10:32:49 0 [Note] InnoDB: Buffered log writes (block size=512 bytes) [00] 2025-11-24 10:32:49 Last binlog file , position 0 recovered pages: 0% 75% 100% (0.0 seconds); tables to flush: 1 0 (0.0 seconds); [00] 2025-11-24 10:32:49 completed OK! # リストア実行 node01:~ # mariadb-backup --copy-back --target-dir /root/mariadb_backup ..... ..... [01] 2025-11-24 10:33:37 Copying ./test/db.opt to /var/lib/mysql/test/db.opt [01] 2025-11-24 10:33:37 ...done [01] 2025-11-24 10:33:37 Copying ./mariadb_backup_info to /var/lib/mysql/mariadb_backup_info [01] 2025-11-24 10:33:37 ...done [01] 2025-11-24 10:33:37 Copying ./xtrabackup_binlog_pos_innodb to /var/lib/mysql/xtrabackup_binlog_pos_innodb [01] 2025-11-24 10:33:37 ...done [00] 2025-11-24 10:33:37 completed OK!
node01:~ #
chown -R mysql:mysql /var/lib/mysql node01:~ # restorecon -R /var/lib/mysql node01:~ # systemctl start mariadb
# レプリケーション設定 node01:~ # mariadb Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 4 Server version: 11.8.3-MariaDB-log MariaDB package 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=(マスターサーバーの IP アドレス) # master_user=(レプリケーション用 ID) # master_password=(レプリケーション用 ID のパスワード) MariaDB [(none)]> change master to master_host='10.0.0.31', master_user='repl_user', master_password='password', master_use_gtid=slave_pos; Query OK, 0 rows affected (0.041 sec) # レプリケーション開始 MariaDB [(none)]> start slave; Query OK, 0 rows affected (0.00 sec) # ステータス確認 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: repl_user Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000001 Read_Master_Log_Pos: 521 Relay_Log_File: node01-relay-bin.000002 Relay_Log_Pos: 820 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: 521 Relay_Log_Space: 1130 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: Yes 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: Yes 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: Slave_Pos Gtid_IO_Pos: 1-101-1 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: 1 Slave_Non_Transactional_Groups: 0 Slave_Transactional_Groups: 0 Replicate_Rewrite_DB: 1 row in set (0.002 sec) |
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