[openstack-dev] diskimage builder works for trusty but not for xenial

Paul Belanger pabelanger at redhat.com
Wed Jun 21 07:13:08 UTC 2017

On Wed, Jun 21, 2017 at 08:44:45AM +0200, Ignazio Cassano wrote:
> Hi all,
> today I am creating openstack images with disk-image-create.
> It works fine for centos and ubuntu trusty.
> With xenial I got the following error:
> * Connection #0 to host cloud-images.ubuntu.com left intact
> Downloaded and cached
> http://cloud-images.ubuntu.com/xenial/current/xenial-server-cloudimg-amd64-root.tar.gz,
> having forced upstream caches to revalidate
> xenial-server-cloudimg-amd64-root.tar.gz: FAILED
> sha256sum: WARNING: 1 computed checksum did NOT match
> Are there any problems on http://cloud-images.ubuntu.com ?
> Regards
> Ignazio

I would suggest using ubuntu-minimal and centos-minimal elements for creating
images. This is what we do in openstack-infra today which means you'll build the
image directly from dpkg / rpm sources and not download existing images from

This is the solve the issue which you are hitting if upstream images have been
removed / deleted / of failed to download.

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