[CentOS] CentOS-7-x86_64-GenericCloud.raw very unusual format

Tue Mar 22 12:35:26 UTC 2016
Fabian Arrotin <arrfab at centos.org>

On 21/03/16 15:34, Aliaksei Sheshka wrote:
> Hello!
> 
> Is anyone aware why CentOS-7-x86_64-GenericCloud.raw has such unusual format ?
> 
> root at test-srv:~# wget
> http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.raw
> --2016-03-21 13:16:31--
> http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.raw
> Resolving cloud.centos.org (cloud.centos.org)... 162.252.80.138
> Connecting to cloud.centos.org
> (cloud.centos.org)|162.252.80.138|:80... connected.
> HTTP request sent, awaiting response... 200 OK
> Length: 374668382 (357M) [application/x-gzip]
> Saving to: 'CentOS-7-x86_64-GenericCloud.raw'
> CentOS-7-x86_64-GenericCloud.raw
> 100%[=========================================================================>]
> 357.31M  12.9MB/s    in 30s
> 2016-03-21 13:17:03 (11.9 MB/s) - 'CentOS-7-x86_64-GenericCloud.raw'
> saved [374668382/374668382]
> 
> Download reports [application/x-gzip] for raw file
> 
> And indeed
> root at test-srv:~# file CentOS-7-x86_64-GenericCloud.raw
> CentOS-7-x86_64-GenericCloud.raw: gzip compressed data, last modified:
> Sat Feb 27 02:14:37 2016, from Unix
> 
> Ok, lets uncompress:
> root at test-srv:~# zcat -d CentOS-7-x86_64-GenericCloud.raw >
> CentOS-7-x86_64-GenericCloud.a
> 
> And check again
> root at test-srv:~# file CentOS-7-x86_64-GenericCloud.a
> CentOS-7-x86_64-GenericCloud.a: POSIX tar archive (GNU)
> 
> Ok. it's a tar archive.
> 
> root at test-srv:~# tar -xf CentOS-7-x86_64-GenericCloud.a -v
> CentOS-7-x86_64-GenericCloud-1602.raw
> 
> Now it's CentOS-7-x86_64-GenericCloud-1602.raw file which is indeed raw
> 
> What is the point to pack single raw file into the tar.gz and to name it raw ?
> Or it's just a mistake ?
> 
> Thanks!

So I found yesterday that the MultiViews option was active in the
template used by cfgmgmt for those vhosts, and was the root cause of
that behaviour.
I confirm that such .raw image wasn't even present on those
cloud.centos.org, but httpd served the .raw.tar.gz instead.
Fix for this was pushed earlier today so you'll now have a 404 if you
try to download that .raw file again.
That brings though another question : why trying specifically to
download a .raw file that isn't listed on that page ?


-- 
Fabian Arrotin
The CentOS Project | http://www.centos.org
gpg key: 56BEC54E | twitter: @arrfab

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