Am 26.09.2011 20:33, schrieb Josh Fisher:
> On 9/20/2011 5:40 AM, Adrian Reyer wrote:
>> On Sun, Sep 18, 2011 at 05:47:34PM +0200, Tobias Schenk wrote:
>>> I try use bacula 5.0.3 on suse linux to backup lvm snapshots.
>>> I cannot simply mount /dev/dm-6 to somewhere because the contents is a
>>> partitioned raw device of a kvm instance.
>> You could check the path with something like 'ls -l'.
>> On the other hand, you could use 'kpartx' and make the snapshots
>> partitions actually mountable if you 'speak' the used filesystem. The
>> benefit would be you only backup teh changed files in an incremental
>> backup instead of having to save the whole image even with one byte
>> changed.
>> In my installations I ahd always been able to just run a baclua-fd
>> inside the KVM, though.
> Yes, running bacula-fd in the VM should certainly be considered. It
> offers several advantages. For one thing, it is far simpler to restore a
> file to a running VM. In my case, the VMs run in a Pacemaker cluster
> with LVs on DRBD storage, so trying to backup LVM snapshots on the node
> that the VM happens to be running on was far more complex than just
> running bacula-fd in the VMs
I agree to your argument in general. My VMs have minimum two virtual 
disks. One containig the 'system' which rarely changes and others 
containing the 'data' like webserver spaces, DMS and so on. For the 
latter I use bacula-fd.
But for the 'system' I like to use the lvm snapshots. It appears to me 
that I can move the whole vm construct much more quickly around and 
always get a bootable vm system without bootstraps or whatever. I do 
this on amateur scale for a small at-home solution.
If I accidently destroy the 'system' like rm -r *, which embarassingly 
already happened, I can just restore the snapshot, run the vm and 
restore the data. I figure I would have some more steps to do to restore 
a vm otherwise. But maybe that is just my ignorance.


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