MariaDB 10.5 : レプリケーション2021/11/17 |
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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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[root@www ~]#
vi /etc/my.cnf.d/mariadb-server.cnf
[mysqld]
# [mysqld] セクション内に追記 : バイナリログを取得 log-bin=mysql-bin # サーバーID を定義 server-id=101
[root@www ~]#
[root@www ~]# systemctl restart mariadb mysql Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 4 Server version: 10.5.11-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. # 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)]> flush privileges; 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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[root@node01 ~]#
vi /etc/my.cnf.d/mariadb-server.cnf
[mysqld]
[root@node01 ~]# # [mysqld] セクション内に追記 : バイナリログを取得 log-bin=mysql-bin # サーバーID を定義 (プライマリー側とは異なる ID) server-id=102 # リードオンリー read_only=1 # 自身のホスト名を定義 report-host=node01.srv.world 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 [root@www ~]# mkdir /home/mariadb_backup [root@www ~]# mariabackup --backup --target-dir /home/mariadb_backup -u root [00] 2021-11-17 23:11:57 Connecting to MySQL server host: localhost, user: root, password: not set, port: not set, socket: not set [00] 2021-11-17 23:11:57 Using server version 10.5.11-MariaDB-log mariabackup based on MariaDB server 10.5.11-MariaDB Linux (x86_64) [00] 2021-11-17 23:11:57 uses posix_fadvise(). [00] 2021-11-17 23:11:57 cd to /var/lib/mysql/ [00] 2021-11-17 23:11:57 open files limit requested 0, set to 1024 [00] 2021-11-17 23:11:57 mariabackup: using the following InnoDB configuration: ..... ..... [00] 2021-11-17 23:11:59 ...done [00] 2021-11-17 23:11:59 Writing xtrabackup_info [00] 2021-11-17 23:11:59 ...done [00] 2021-11-17 23:11:59 Redo log (from LSN 45106 to 45118) was copied. [00] 2021-11-17 23:11:59 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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# MariaDB を停止して既存データは削除 [root@node01 ~]# systemctl stop mariadb [root@node01 ~]# rm -rf /var/lib/mysql/*
# 転送したバックアップデータ [root@node01 ~]# ll mariadb_backup.tar.gz -rw-r--r--. 1 fedora fedora 406301 Nov 17 23:13 mariadb_backup.tar.gz [root@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 [root@node01 ~]# mariabackup --prepare --target-dir /root/mariadb_backup mariabackup based on MariaDB server 10.5.11-MariaDB Linux (x86_64) [00] 2021-11-17 23:14:35 cd to /root/mariadb_backup/ [00] 2021-11-17 23:14:35 open files limit requested 0, set to 1024 [00] 2021-11-17 23:14:35 This target seems to be not prepared yet. [00] 2021-11-17 23:14:35 mariabackup: using the following InnoDB configuration for recovery: [00] 2021-11-17 23:14:35 innodb_data_home_dir = . ..... ..... 2021-11-17 23:14:35 0 [Note] InnoDB: Initializing buffer pool, total size = 104857600, chunk size = 104857600 2021-11-17 23:14:35 0 [Note] InnoDB: Completed initialization of buffer pool 2021-11-17 23:14:35 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=45106,45106 [00] 2021-11-17 23:14:35 Last binlog file , position 0 [00] 2021-11-17 23:14:35 completed OK! # リストア実行 [root@node01 ~]# mariabackup --copy-back --target-dir /root/mariadb_backup mariabackup based on MariaDB server 10.5.11-MariaDB Linux (x86_64) [01] 2021-11-17 23:15:17 Copying ibdata1 to /var/lib/mysql/ibdata1 [01] 2021-11-17 23:15:17 ...done [01] 2021-11-17 23:15:17 Copying ./mysql/global_priv.frm to /var/lib/mysql/mysql/global_priv.frm [01] 2021-11-17 23:15:17 ...done ..... ..... [01] 2021-11-17 23:15:17 Copying ./ib_buffer_pool to /var/lib/mysql/ib_buffer_pool [01] 2021-11-17 23:15:17 ...done [01] 2021-11-17 23:15:17 Copying ./xtrabackup_info to /var/lib/mysql/xtrabackup_info [01] 2021-11-17 23:15:17 ...done [00] 2021-11-17 23:15:17 completed OK! # マスターログの File 値 と Position 値 確認 [root@node01 ~]# cat /root/mariadb_backup/xtrabackup_binlog_info mysql-bin.000001 642 0-101-2 # レプリケーション設定 [root@node01 ~]# mysql Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 4 Server version: 10.5.11-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. # 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) # master_log_file=(確認したマスターログの File 値) # master_log_pos=(確認したマスターログの Position 値) MariaDB [(none)]> change master to master_host='10.0.0.31', master_user='repl_user', master_password='password', master_log_file='mysql-bin.000001', master_log_pos=642; Query OK, 0 rows affected (0.191 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: 642 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: 642 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: 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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