MariaDB 10.3 : バックアップ2020/01/23

	MariaDB のデータベースをバックアップ/リストアする際は付属のツールで実行可能です。
[1]	バックアップツールは通常 MariaDB Server と同時にインストールされますが、もしをインストールされていない場合は以下のようにしてインストールします。

# SCLoからインストール

[root@www ~]#

yum --enablerepo=centos-sclo-rh -y install rh-mariadb103-mariadb-backup

[2]	バックアップを実行します。例として、[/home/mariadb_backup] ディレクトリ配下にバックアップを取得します。

[root@www ~]#

mkdir /home/mariadb_backup

[root@www ~]#

mariabackup --backup --target-dir /home/mariadb_backup -u root -p password

[00] 2020-01-22 21:43:11 Connecting to MySQL server host: localhost, user: root, password: set, port: not set, socket: not set
[00] 2020-01-22 21:43:11 Using server version 10.3.13-MariaDB
[00] 2020-01-22 21:43:11 mariabackup based on MariaDB server 10.3.13-MariaDB Linux (x86_64)
[00] 2020-01-22 21:43:11 uses posix_fadvise().
[00] 2020-01-22 21:43:11 cd to /var/opt/rh/rh-mariadb103/lib/mysql/
.....
.....
[00] 2020-01-22 21:43:13         ...done
[00] 2020-01-22 21:43:13 Writing xtrabackup_info
[00] 2020-01-22 21:43:13         ...done
[00] 2020-01-22 21:43:13 Redo log (from LSN 1639817 to 1639826) was copied.
[00] 2020-01-22 21:43:13 completed OK!

[root@www ~]#

ll /home/mariadb_backup

total 12332
-rw-r-----. 1 root root    16384 Jan 22 21:43 aria_log.00000001
-rw-r-----. 1 root root       52 Jan 22 21:43 aria_log_control
-rw-r-----. 1 root root      297 Jan 22 21:43 backup-my.cnf
-rw-r-----. 1 root root      988 Jan 22 21:43 ib_buffer_pool
-rw-r-----. 1 root root 12582912 Jan 22 21:43 ibdata1
-rw-r-----. 1 root root     2560 Jan 22 21:43 ib_logfile0
drwx------. 2 root root     4096 Jan 22 21:43 mysql
drwx------. 2 root root       20 Jan 22 21:43 performance_schema
-rw-r-----. 1 root root      101 Jan 22 21:43 xtrabackup_checkpoints
-rw-r-----. 1 root root      446 Jan 22 21:43 xtrabackup_info

[3]	バックアップしたデータを、他ホスト上の MariaDB サーバーへリストアします。事前にバックアップしたデータを [tar] でまとめるなり [rsync] でそのまま転送する等して、バックアップデータをリストア先サーバーに転送しておいてください。

# MariaDB を停止して既存データは削除

[root@node01 ~]#

systemctl stop rh-mariadb103-mariadb

[root@node01 ~]#

rm -rf /var/opt/rh/rh-mariadb103/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 root root 213244 Jan 22 21:51 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

[00] 2020-01-22 21:57:52 mariabackup based on MariaDB server 10.3.13-MariaDB Linux (x86_64)
[00] 2020-01-22 21:57:52 cd to /root/mariadb_backup/
[00] 2020-01-22 21:57:52 This target seems to be not prepared yet.
[00] 2020-01-22 21:57:52 mariabackup: using the following InnoDB configuration for recovery:
[00] 2020-01-22 21:57:52 innodb_data_home_dir = .
[00] 2020-01-22 21:57:52 innodb_data_file_path = ibdata1:12M:autoextend
[00] 2020-01-22 21:57:52 innodb_log_group_home_dir = .
[00] 2020-01-22 21:57:52 InnoDB: Using Linux native AIO
[00] 2020-01-22 21:57:52 Starting InnoDB instance for recovery.
[00] 2020-01-22 21:57:52 mariabackup: Using 104857600 bytes for buffer pool (set by --use-memory parameter)
2020-01-22 21:57:52 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-01-22 21:57:52 0 [Note] InnoDB: Uses event mutexes
2020-01-22 21:57:52 0 [Note] InnoDB: Compressed tables use zlib 1.2.7
2020-01-22 21:57:52 0 [Note] InnoDB: Number of pools: 1
2020-01-22 21:57:52 0 [Note] InnoDB: Using SSE2 crc32 instructions
2020-01-22 21:57:52 0 [Note] InnoDB: Initializing buffer pool, total size = 100M, instances = 1, chunk size = 100M
2020-01-22 21:57:52 0 [Note] InnoDB: Completed initialization of buffer pool
2020-01-22 21:57:52 0 [Note] InnoDB: page_cleaner coordinator priority: -20
2020-01-22 21:57:52 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=1639817
[00] 2020-01-22 21:57:52 Last binlog file , position 0
[00] 2020-01-22 21:57:52 completed OK!

# リストア実行

[root@node01 ~]#

mariabackup --copy-back --target-dir /root/mariadb_backup

[00] 2020-01-22 21:58:27 mariabackup based on MariaDB server 10.3.13-MariaDB Linux (x86_64)
[01] 2020-01-22 21:58:27 Copying ibdata1 to /var/opt/rh/rh-mariadb103/lib/mysql/ibdata1
[01] 2020-01-22 21:58:27         ...done
.....
.....
[01] 2020-01-22 21:58:28 Copying ./xtrabackup_binlog_pos_innodb to /var/opt/rh/rh-mariadb103/lib/mysql/xtrabackup_binlog_pos_innodb
[01] 2020-01-22 21:58:28         ...done
[00] 2020-01-22 21:58:28 completed OK!

[root@node01 ~]#

chown -R mysql. /var/opt/rh/rh-mariadb103/lib/mysql

[root@node01 ~]#

systemctl start rh-mariadb103-mariadb