MariaDB Backup and Restore

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MariaDB Backup and Restore

 - This article is a Work in Progress, and may be unfinished or missing sections.

Overview

Backup

Full Backup (Base Backup)

mkdir -p /opt/db_backup/backup
mariabackup --backup -S /opt/zimbra/data/tmp/mysql/mysql.sock --target-dir=/opt/db_backup/backup --user=root --password=`zmlocalconfig -s -m nokey mysql_root_password`

Incremental Backup

1st Incremental backup:

mkdir -p /opt/db_backup/inc1
mariabackup --backup -S /opt/zimbra/data/tmp/mysql/mysql.sock --target-dir=/opt/db_backup/inc1/ --incremental-basedir=/opt/db_backup/backup/ --user=root --password=`zmlocalconfig -s -m nokey mysql_root_password`

2nd Incremental backup:

mkdir -p /opt/db_backup/inc2 
mariabackup --backup -S /opt/zimbra/data/tmp/mysql/mysql.sock --target-dir=/opt/db_backup/inc2/ --incremental-basedir=/opt/db_backup/inc1/ --user=root --password=`zmlocalconfig -s -m nokey mysql_root_password`

3rdIncremental backup:

mkdir -p /opt/db_backup/inc3 
mariabackup --backup -S /opt/zimbra/data/tmp/mysql/mysql.sock --target-dir=/opt/db_backup/inc3/ --incremental-basedir=/opt/db_backup/inc2/ --user=root --password=`zmlocalconfig -s -m nokey mysql_root_password`

Restore

Prepare Backup for Restore

Prepare Base Backup

mariabackup --prepare --apply-log-only -S /opt/zimbra/data/tmp/mysql/mysql.sock --target-dir=/opt/db_backup/backup

Apply Incremental Backup to Base Backup

mariabackup --prepare --apply-log-only -S /opt/zimbra/data/tmp/mysql/mysql.sock --target-dir=/opt/db_backup/backup --incremental-dir=/opt/db_backup/inc1/  
mariabackup --prepare --apply-log-only -S /opt/zimbra/data/tmp/mysql/mysql.sock --target-dir=/opt/db_backup/backup --incremental-dir=/opt/db_backup/inc2/  
mariabackup --prepare --apply-log-only -S /opt/zimbra/data/tmp/mysql/mysql.sock --target-dir=/opt/db_backup/backup --incremental-dir=/opt/db_backup/inc3/  

Restore Prepared Backup

1) Stop MariaDB service.

mysql.server stop

2) Clear existing datadir (/opt/zimbra/db/data) directory. [ensure that the datadir is empty]

mv /opt/zimbra/db/data /opt/zimbra/db/data.OLD 
mkdir /opt/zimbra/db/data 

3) Restore the prepared backup.

mariabackup --copy-back -S /opt/zimbra/data/tmp/mysql/mysql.sock --target-dir=/opt/db_backup/backup 
OR
mariabackup --copy-back -S /opt/zimbra/data/tmp/mysql/mysql.sock --target-dir=/opt/db_backup/backup --datadir /opt/zimbra/db/data 

4) Fix the permissions.

chown -R zimbra:zimbra /opt/zimbra/db/data  

5) Start MariaDB service.

mysql.server start