Re: [Libguestfs] New tool proposal
On 05/22/2012 05:17 PM, Richard W.M. Jones wrote:
On Tue, May 22, 2012 at 04:54:23PM +0800, Wanlong Gao wrote:
> On 05/15/2012 04:41 PM, Richard W.M. Jones wrote:
>
>> On Tue, May 15, 2012 at 04:13:27PM +0800, Wanlong Gao wrote:
>>> Hi Rich,
>>>
>>> We just talked about a new tool virt-diff which can diff files
>>> between two guest, suggested by Kamezawa Hiroyuki
<kamezawa.hiroyu(a)jp.fujitsu.com>
>>>
>>> things like below,
>>> # virt-diff -Nru --guest=Guest0 --guest=Guest1 /etc/hosts
>>>
>>> Any thought about this?
>>
>> Sure, sounds like a good idea.
>
>
> What do you think about how to implement the virt-diff ?
> particularly for the recursive option of diff?
It depends what you want it to do! I'd definitely start with
at least some notes about exactly what you want it to do. Files?
Filesystems? Metadata? Partitions? Windows Regsitry?
Note that you can already do some sorts of file comparison using
'virt-ls', ie:
virt-ls -lR --checksum -d guest1 / > files1
virt-ls -lR --checksum -d guest2 / > files2
diff -u files1 files2
yes, I meant files.
"
quoted from Kame:
I think this kind of command to do comparison between 2 guests is required for
private cloud system. System admin can find error setting by diff.
"
So, you means we can use virt-ls to list the different files list, and then
use virt-cat to see the different between two single files?
Thanks,
Wanlong Gao
Rich.