[et-mgmt-tools] [patch] virt-convert add disk signature into virt-image format export
Bryan Kearney
bkearney at redhat.com
Tue Sep 30 17:50:10 UTC 2008
Cole Robinson wrote:
> Joey Boggs wrote:
>> Adds disk signatures into virt-convert for virt-image format virtual
>> machines
>>
>>
>
> Comments inline.
>
>> diff -r 58a909b4f71c virtconv/parsers/virtimage.py
>> --- a/virtconv/parsers/virtimage.py Mon Sep 22 11:32:11 2008 -0400
>> +++ b/virtconv/parsers/virtimage.py Fri Sep 26 15:58:29 2008 -0400
>> @@ -22,7 +22,7 @@
>> import virtconv.vmcfg as vmcfg
>> import virtconv.diskcfg as diskcfg
>> import virtinst.FullVirtGuest as fv
>> -
>> +import sha
>
> Please keep the preceeding newline. Generally imports are
> grouped in some attempt at a logical manner for the sake
> of readability.
>
>> from xml.sax.saxutils import escape
>> from string import ascii_letters
>> import re
>> @@ -171,9 +171,11 @@
>> type = "raw"
>> if disk.type == diskcfg.DISK_TYPE_ISO:
>> type = "iso"
>> + diskfile=open(path,'r').read()
>> + checksum=sha.new(diskfile).hexdigest()
>
> Please try to be consistent with surrounding code
> format.
>
> The code above is using: var = val
> You've added: var=val
>
> It helps code readability if spacing is reasonably
> consistent throughout.
>
> Hmm, so I just tried the above. What that is essentially
> trying to do is read the entire disk into memory, then
> pass it off as a giant string to the sha function. Clearly
> this is not a workable solution. This also applies to
> the virt-image hash changes as well. Haven't looked into
> the correct way to do it though.
>
> This is also a rather large performance drain. So at the
> very least it should not be the default. That said, I
> don't know the optimal way to expose this option, or
> even if we should.
I think this will become important as we look to distribute the
appliances either via RHN or on public sites. Also.. this makes us a bit
more consistent with OVF.
I am fine with making it off by default, and then causing the command
line to turn it on.
-- bk
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