Open Stack

 John Postlethwait wrote:
>... Also, you need to make sure you are linking DIRECTLY to the image
>itself, as if it is a redirect or any other HTTP response besides the file,
>Glance will still create an image out of it and it will seem to have worked.
>Sometimes you can even launch said instances that are totally invalid. (During
>my testing of this I was able to successfully launch instances that were just
>the HTTP data from 302 redirects.)

Why would the Glance client treat an HTTP 302 redirect as a 2xx? That seems rather odd behavior, 
and less like a feature and more like a bug, to me, if true. From the looks of the code, a RedirectException
should be thrown. 

Cheers,

Christopher Ferris
IBM Distinguished Engineer, CTO Industry and Cloud Standards
Member, IBM Academy of Technology
IBM Software Group, Standards Strategy
email: chrisfer at us.ibm.com
Twitter: christo4ferris
phone: +1 508 234 2986

-----openstack-bounces+chrisfer=us.ibm.com at lists.launchpad.net wrote: -----

>To: Wang Li <foxban at gmail.com>
>From: John Postlethwait 
>Sent by: openstack-bounces+chrisfer=us.ibm.com at lists.launchpad.net
>Date: 07/09/2012 03:38PM
>Cc: openstack at lists.launchpad.net
>Subject: Re: [Openstack] Compressed image support ?
>
>                 
>                     Hi Wang,
>
>Horizon simply uses the Python interface to Glance and tells it to create the
>image. Glance supports creating images from remote locations that are in a
>compressed format. There are examples in the Glance documentation
>here: https://github.com/openstack/glance/blob/master/doc/source/glance.rst#exa
>mples-of-uploading-different-kinds-of-images and in the Glance binary itself
>here: https://github.com/openstack/glance/blob/master/bin/glance#L190 So this
>is widely supported and documented in Glance.
>
>The caveats are that through Horizon, the file MUST be accessible via the
>network configuration where Glance resides, if it is not accessible due to
>network configuration or something else, it will fail but seem to have
>succeeded. Also, you need to make sure you are linking DIRECTLY to the image
>itself, as if it is a redirect or any other HTTP response besides the file,
>Glance will still create an image out of it and it will seem to have worked.
>Sometimes you can even launch said instances that are totally invalid. (During
>my testing of this I was able to successfully launch instances that were just
>the HTTP data from 302 redirects.)
>
>I would first confirm that where Horizon is installed is able to communicate to
>where you are trying to copy the image from, and that the link you are using
>for the image is, in fact, a valid binary and not some other HTTP response.
>
>John Postlethwait
>Nebula, Inc.
>
>                                   On Monday, July 9, 2012 at 1:04 AM, Wang Li
>wrote:
>                                      
> hi, all
>
>        As to the horizon UI,   zip and tar.gz image files are supported.
>
>"""
>        Specify an image to upload to the Image Service.
>
>        Currently only images available via an HTTP URL are supported. The
>image location must be accessible to the Image Service. Compressed image
>binaries are supported (.zip and .tar.gz.)
>
>"""
>
>        My test environment is as follow:
>
>        1. LVM as image backend of vms.
>        2. running vms on Xen in PV mode
>
>        But when I upload a tar gzipped raw image file, nova just dd from it to
>logical volume, thus, nova error logged 
>
>                "Boot loader didn't return any data!"
>
>        I grepped the nova and glance source code, found nothing about of "gz"
>or "zip" that related to image.
>
>        This feature is valuable to our use case, for the raw image file is
>4GB, but the compressed version is only 400MB.
>
>        Did I misunderstand the compressed image support?
>
>
>Regards.
>Wang Li
>        
>        
>
>          
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