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vmbackup

Backup scripts for virtual machines run by libvirt, using the "live disk backup with active blockcommit" method:

http://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit

The backup script assumes a machine named vm is stored in a file named vm.qcow2. This is hardcoded but could be modified as the backup method itself doesn't rely on the VM being stored as a qcow2 file.

The backup script also assumes that the guest agent is installed in all VM. This is hardcoded but could be modified.

Dependencies

  • libvirt, virsh,... for VM management
  • cfget for config file parsing

Installation

cp vmbackup vmbackuprotate /usr/local/sbin/
cp etc/vmbackup.conf /etc/
cp etc/cron.daily/vmbackup /etc/cron.daily/

Usage

vmbackup

vmbackup can be used to backup a single VM.

  Usage : vmbackup <vm dirpath> <vm name> <backup filepath>
      vm dirpath:      path to directory where VM file is stored
      vm name:         name of VM to backup
      backup filepath: path of backup file to create
      Note: VM file is assumed to be dirpath/name.qcow2

vmbackuprotate

vmbackuprotate backs up several VM and rotates backups.

   Usage : vmbackuprotate <config file path>
       config file path: path to configuration file'

Its parameters are passed in vmbackup.conf, which should be self-explanatory.

Documentation

For more information, see this thread from the libvirt users mailing list.

And of course, the libvirt wiki.