Comments on: Backup Xen virtual machines with LVM snapshots and ftplicity/duplicity

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Given typical VMware consolidation ratios in the range of six to 10 virtual machines (VMs) per host, a virtual server administrator must choose a backup …

By: Matthieu Larcher

Matthieu Larcher — Fri, 10 Jun 2011 22:47:00 +0000

After looking at the various options, I eventually implemented what you described. Thanks for this very nice and clear tutorial by the way.
I used percona’s xtrabackup instead of automysqlbackup. It seems to be the best hot backup tool there is now, it handles all engines, and it’s free and open source. What else could you ask for? ;) I’d recommend you check on it at http://www.percona.com/software/percona-xtrabackup/ There’s a good tutorial at http://marcus.bointon.com/archives/87-MySQL-backups-with-Perconas-XtraBackup.html
Also, I had troubles creating the pgp key, as my box wasn’t generating enough entropy. I eventually solved it thanks to this post : https://www.wzdftpd.net/blog/index.php?post/2008/06/16/24-linux-kernel-and-entropy

By: Mathias

Mathias — Wed, 08 Jun 2011 18:35:00 +0000

Well, backups are consistent, as LVM snapshots give you an exact state of the block device at creation time. You just have to handle some exceptional cases/applications like databases manually (that’s why I excluded the MySQL data directory) in the example config.

Taking the MySQL example, you can still include them in your backup by dumping them to disk and backing up the dumps (using automysqlbackup for example).

By: Matthieu Larcher

Matthieu Larcher — Wed, 08 Jun 2011 18:02:00 +0000

Would you have any better solution to suggest ? I liked what I saw in this post very much until I read about “crash consistent” backups :/

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While this method does reduce the number of agents that must be installed and maintained, it still requires that the administrator either shut down the virtual machines to back them up or back up the VMs as open files, creating “crash consistent” …

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Dropbox is a backup and storage service that provides 2GB of space free for … the form of virtual machines on Amazon’s Xen-based virtualization platform.

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You can then use tools provided with the hypervisor to snapshot the virtual machine in the background and move the copy via a dedicated backup server for …

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This virtual appliance is equipped to configure with popular virtual environments such as VMWare, Microsoft’s Hyper-V, and XEN hypervisors and virtual …