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MariaDB 10.3 : Backup
2021/03/15
 
For Backup and Restore MariaDB Data, it's possible to run with [mariabackup].
[1] Generally [mariabackup] tool is installed with MariaDB Server for dependency, but if it has not been installed, Install it first.
[root@www ~]#
dnf -y install mariadb-backup
[2] Run Backup.
For example, get backup under [/home/mariadb_backup].
[root@www ~]#
mkdir /home/mariadb_backup

[root@www ~]#
mariabackup --backup --target-dir /home/mariadb_backup -u root -p password

[00] 2021-03-14 19:10:46 Connecting to MySQL server host: localhost, user: root, password: set, port: not set, socket: not set
[00] 2021-03-14 19:10:46 Using server version 10.3.27-MariaDB
mariabackup based on MariaDB server 10.3.27-MariaDB Linux (x86_64)
[00] 2021-03-14 19:10:46 uses posix_fadvise().
[00] 2021-03-14 19:10:46 cd to /var/lib/mysql/
[00] 2021-03-14 19:10:46 open files limit requested 0, set to 1024
[00] 2021-03-14 19:10:46 mariabackup: using the following InnoDB configuration:
[00] 2021-03-14 19:10:46 innodb_data_home_dir =
[00] 2021-03-14 19:10:46 innodb_data_file_path = ibdata1:12M:autoextend
[00] 2021-03-14 19:10:46 innodb_log_group_home_dir = ./
[00] 2021-03-14 19:10:46 InnoDB: Using Linux native AIO
2021-03-14 19:10:46 0 [Note] InnoDB: Number of pools: 1
.....
.....
[00] 2021-03-14 19:10:49         ...done
[00] 2021-03-14 19:10:49 Writing xtrabackup_info
[00] 2021-03-14 19:10:49         ...done
[00] 2021-03-14 19:10:49 Redo log (from LSN 4422285 to 4422294) was copied.
[00] 2021-03-14 19:10:49 completed OK!

[root@www ~]#
ll /home/mariadb_backup

total 12336
-rw-r-----. 1 root root    16384 Mar 14 19:10 aria_log.00000001
-rw-r-----. 1 root root       52 Mar 14 19:10 aria_log_control
-rw-r-----. 1 root root      324 Mar 14 19:10 backup-my.cnf
-rw-r-----. 1 root root     2773 Mar 14 19:10 ib_buffer_pool
-rw-r-----. 1 root root 12582912 Mar 14 19:10 ibdata1
-rw-r-----. 1 root root     2560 Mar 14 19:10 ib_logfile0
drwx------. 2 root root     4096 Mar 14 19:10 mysql
drwx------. 2 root root       20 Mar 14 19:10 performance_schema
drwx------. 2 root root     4096 Mar 14 19:10 wordpress
-rw-r-----. 1 root root       77 Mar 14 19:10 xtrabackup_checkpoints
-rw-r-----. 1 root root      446 Mar 14 19:10 xtrabackup_info
[3] For restoring data from backup on another host, run like follows.
Before restoring, transfer backup data to the target host with [rsync] or [scp] and so on.
# stop MariaDB and remove existing data

[root@node01 ~]#
systemctl stop mariadb

[root@node01 ~]#
rm -rf /var/lib/mysql/*
# transfered backup data

[root@node01 ~]#
ll mariadb_backup.tar.gz

-rw-r--r--. 1 root root 605540 Mar 14 19:19 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

mariabackup based on MariaDB server 10.3.27-MariaDB Linux (x86_64)
[00] 2021-03-14 19:19:53 cd to /root/mariadb_backup/
[00] 2021-03-14 19:19:53 This target seems to be not prepared yet.
[00] 2021-03-14 19:19:53 mariabackup: using the following InnoDB configuration for recovery:
[00] 2021-03-14 19:19:53 innodb_data_home_dir = .
[00] 2021-03-14 19:19:53 innodb_data_file_path = ibdata1:12M:autoextend
[00] 2021-03-14 19:19:53 innodb_log_group_home_dir = .
[00] 2021-03-14 19:19:53 InnoDB: Using Linux native AIO
[00] 2021-03-14 19:19:53 Starting InnoDB instance for recovery.
[00] 2021-03-14 19:19:53 mariabackup: Using 104857600 bytes for buffer pool (set by --use-memory parameter)
2021-03-14 19:19:53 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2021-03-14 19:19:53 0 [Note] InnoDB: Uses event mutexes
2021-03-14 19:19:53 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2021-03-14 19:19:53 0 [Note] InnoDB: Number of pools: 1
2021-03-14 19:19:53 0 [Note] InnoDB: Using SSE2 crc32 instructions
2021-03-14 19:19:53 0 [Note] InnoDB: Initializing buffer pool, total size = 100M, instances = 1, chunk size = 100M
2021-03-14 19:19:53 0 [Note] InnoDB: Completed initialization of buffer pool
2021-03-14 19:19:53 0 [Note] InnoDB: page_cleaner coordinator priority: -20
2021-03-14 19:19:53 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=4422285
[00] 2021-03-14 19:19:53 Last binlog file , position 0
[00] 2021-03-14 19:19:54 completed OK!

# run restore

[root@node01 ~]#
mariabackup --copy-back --target-dir /root/mariadb_backup

mariabackup based on MariaDB server 10.3.27-MariaDB Linux (x86_64)
[01] 2021-03-14 19:20:31 Copying ibdata1 to /var/lib/mysql/ibdata1
[01] 2021-03-14 19:20:31         ...done
[01] 2021-03-14 19:20:31 Copying ./mysql/innodb_table_stats.ibd to /var/lib/mysql/mysql/innodb_table_stats.ibd
[01] 2021-03-14 19:20:31         ...done
[01] 2021-03-14 19:20:31 Copying ./mysql/innodb_index_stats.ibd to /var/lib/mysql/mysql/innodb_index_stats.ibd
[01] 2021-03-14 19:20:31         ...done
.....
.....
[01] 2021-03-14 19:20:32 Copying ./ib_buffer_pool to /var/lib/mysql/ib_buffer_pool
[01] 2021-03-14 19:20:32         ...done
[01] 2021-03-14 19:20:32 Copying ./xtrabackup_info to /var/lib/mysql/xtrabackup_info
[01] 2021-03-14 19:20:32         ...done
[00] 2021-03-14 19:20:32 completed OK!

[root@node01 ~]#
chown -R mysql. /var/lib/mysql

[root@node01 ~]#
systemctl start mariadb

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