On Wed, Jun 09, 2021 at 07:53:04PM +0000, Zbigniew Jędrzejewski-Szmek wrote: > On Wed, Jun 09, 2021 at 10:29:50AM -0500, Justin Forbes wrote: > > On Wed, Jun 9, 2021 at 10:19 AM David Duncan <davd...@gmail.com> wrote: > > > On Wed, Jun 9, 2021, 4:13 AM Zbigniew Jędrzejewski-Szmek > > > <zbys...@in.waw.pl> wrote: > > >> > > >> On Wed, Jun 09, 2021 at 06:52:40AM -0000, David Duncan wrote: > > >> > Bumping this for technical discussion. We are planning to put this in > > >> > action if there are no technical objections. > > >> > > >> Please wait until the FESCo has approved the Change. > > > > > > > > > I made that sound like an imperative. That was a mistake. I wanted to > > > redirect the thread to technical review instead of program concerns. Of > > > course no actual implementation will be done without approval. > > > > > > > So, I suppose I should mention here for discussion what I put in the > > FESCo ticket. My main concern with this from a cloud image > > standpoint, is cloud images are run on a number of hosts. Many of > > those hosts are RHEL or CentOS based. As RHEL does not enable the > > btrfs filesystem at all, and has no plans to that I am aware of, this > > means that users on those hosts will no longer be able to mount their > > images to debug issues or modify in any way. Libguestfs for RHEL is > > not a workaround at this point, because it doesn't support btrfs on > > RHEL either. It would also mean that these images could not be used > > as container images in that environment. Of course the images can > > still be booted, and will work as expected as long as they are running > > in a virtualized environment with their own kernel. I am not sure how > > important this is for people, but it needs to be considered. > > Yeah, I think we have to accept that there won't be any kernel support > in RHEL in a timeframe that matters for Fedora, and the RHEL host will not be > able to mount the images natively. So the questions for me are: > 1. I this a problem in practice? I.e. how often do people need to use Fedora > images for containers on RHEL hosts?
The case I am wondering about is openstack and other private cloud's. I know in the past when we ran an openstack cloud, it could resize images to the flavor you picked and it did so outside of cloud-init, it was actual openstack putting the image on a backing store and resizing it. Perhaps it doesn't do that anymore, or perhaps it would work with btfs, but it would be nice to know. :( kevin
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