BackupT2BCloud

Backup of VMs

The whole /var/lib/one directory is mounted from the volta fileserver, and regular scheduled snapshots are done automatically to tesla. You can access to these snapshots going through /var/lib/one/.zfs.

Backup of the OpenNebula database

The OpenNebula database being located in /var/lib/mysql, it is not backed up with the ZFS snapshots described in the previous section. That's why we have created a cron task to automatically do a regular dump of the mysql database into the /var/lib/one directory.

To avoid having to specify the user and password in the mysqldump command, we have created the file ~/.my.cnf with the following content :

[mysqldump]
user=mysqluser
password=secret

Here is the script that does a dump into a file :

#!/bin/bash

# Create the backup directory if it doesn't exist
BACKUPDIR=/var/lib/one/one_mysql_db_backups
mkdir -p $BACKUPDIR

# Remove backups older than 7 days
find $BACKUPDIR -name 'one_db_mysqldump*' -mtime +7 -exec rm -f {} \;

# Make a dump of the db to a file in BACKUPDIR
DATE=`date +'%d-%m-%y_%H:%M:%S'`
FILENAME=$BACKUPDIR"/one_db_mysqldump_$DATE"
mysqldump opennebula > $FILENAME

Dumps older than 7 days are removed.

Here is the crontab command :

* 5,17 * * * /root/one_db_backup.sh > /var/log/one_db_backup.log 2>&1