Backup of a running container with vzdump

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Revision as of 18:52, 27 February 2008 by Gbjbaanb (talk | contribs) (→‎Backup: - added blog link with LVM setup instructions)
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Vzdump

Vzdump is an utility to make consistent snapshots of running OpenVZ VEs. It basically creates a tar archive of the VE private area, which also includes the VE configuration files.

There are several ways to provide consistency:

- Stop the VE during backup (very long downtime)

- Use rsync and suspend/resume (minimal downtime)

- Use LVM2 (no downtime)

Vzdump stores the backup on the disk in a single file. This file should go to a tape backup for archiving.

Download

Download vzdump rpm or deb packages from http://download.openvz.org/contrib/utils/vzdump/ or for newest version, check http://www.proxmox.com/cms_proxmox/en/technology/oss-software/openvz/

For rpm based systems: 

wget http://www.proxmox.com/cms_proxmox/cms/upload/vzdump/vzdump-1.0-2.noarch.rpm

For Debian based systems: 

wget http://www.proxmox.com/cms_proxmox/cms/upload/vzdump/vzdump_1.0-2_all.deb

Installation

For rpm based systems: 

rpm -i vzdump-1.0-2.noarch.rpm

For Debian based systems: 

dpkg -i vzdump_1.0-2_all.deb

Synopsis

vzdump OPTIONS [--all â <VEID>]

       --compress              compress dump file (gzip)

       --dumpdir DIR           store resulting files in DIR

       --xdelta                create a differential backup using xdelta

       --mailto EMAIL          send notification mail to EMAIL

       --stop                  stop/start VPS if running

       --suspend               suspend/resume VPS when running

       --snapshot              use LVM snapshot when running

       --restore FILENAME      restore FILENAME

Examples

Use a running VE, for example install this: http://wiki.openvz.org/Proxmox_Mail_Gateway_in_VE

Backup

Simply dump VE 777 - no snapshot, just archive the VE private area and configuration files to the default dump directory (usually /vz/dump/). 

vzdump 777

Use rsync and suspend/resume to create a snapshot (minimal downtime). 

vzdump --suspend 777

Backup all VEs and send notification mails to root. 

vzdump --suspend --all --mailto root

Use LVM2 to create snapshots (no downtime). 

vzdump --dumpdir /space/backup --snapshot 777
  • Note that using LVM2 and vzdump to create snapshots requires 512Mb of free space in your VG as described here

Restore

Restore above backup to VE 600 

vzdump --restore /space/backup/vzdump-777.tar 600
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