Yes, just to confirm the XenAPI driver will automatically resize disks where it can without needing an agent / cloud-init installed in the VM. It does this by mounting the disk in the domain running nova and resizing the filesystem/device. Bob From: Joe Topjian [mailto:joe.topjian at cybera.ca] Sent: 09 October 2013 14:52 To: Tom Fifield Cc: openstack at lists.openstack.org Subject: Re: [Openstack] What Exactly Flavor Work? My understanding is that automatic resize will occur if the following are all true: * auto_disk_config=True is set as a property on the image in the Image Registry. * The disk on the image has only one partition. * The file system on the one partition is ext3 or ext4. I think Xen provides some extra help in this area by doing the resize itself (I *think*). KVM defers the job to the user. There was a long discussion on the openstack-operators list about building CentOS images: http://www.gossamer-threads.com/lists/openstack/operators/25790 The td;dr version would be this post where I link to some scripts that are able to build a complete CentOS image that resizes as you would expect: http://www.gossamer-threads.com/lists/openstack/operators/28733#28733 Hope that helps, Joe -- Joe Topjian Systems Architect Cybera Inc. www.cybera.ca<http://www.cybera.ca> Cybera is a not-for-profit organization that works to spur and support innovation, for the economic benefit of Alberta, through the use of cyberinfrastructure. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20131009/8c06faa7/attachment.html>