Linux Today: Linux News On Internet Time.

Back Up LVM XEN Guest Containing LVs

Feb 19, 2009, 04:32 (0 Talkback[s])
(Other stories by Chris Cowley)

[ Thanks to Falko Timme for this link. ]

"Within these VMs the DomU OS is once again using LVM for various reasons. This does create some headaches for taking the backup.

"The basic idea is:
Create a snapshot Logical Volume
Allow the Dom0 to see the Logical Volumes within the Logical Volume (phew).
Mount the newly discovered Logical Volumes.
Take backup
Tidy up

"There are couple of assumptions that I have made. I have assumed that you have used custom names for the Volume Groups in either (or both) the Dom0 (host) or DomU (guest). Personally, I always use a kickstart file to create my DomUs, so I have the main VG set to XenVG00. All my DomU's are all in a VG on the Dom0 called vg_xen - this is not essential though.

"The second assumption is that you have some spare space in the Volume Group holding the DomU images. It does not need to be much, as we will be removing the snapshot volume when we have finished with it."

Complete Story

Related Stories: