On Thu, 2021-05-20 at 15:58 -0400, Colin Walters wrote: > > On Thu, May 20, 2021, at 8:21 AM, Daniel P. Berrangé wrote: > > > Lets say the Fedora base image is refreshed with updated RPMs on a weekly > > basis. Each application republishes their app containers on an arbitrarily > > different schedule, maybe fortnightly, monthly, whatever. Thus out of > > 10 different apps deployed, you could easily find yourself shipping 10 > > different versions of the base image. > > This of course is the big difference between flatpak and docker/podman/kubernetes as they work today. flatpak dynamically links base images (by having apps go into `/app`). > > I can't think of a hard reason that podman couldn't learn to dynamically link base images too with the same approach of having the app bits live in `/app`. Or honestly, in many cases we could just forcibly dynamically link layers, for most of the OpenShift platform we just have big statically linked Go binaries that don't overlay anything on the host (no package installs etc). > > One could imagine something like this in a Containerfile: > > ``` > FROM quay.io/fedora:rust as buildroot > COPY . /build > RUN cargo build --release > > FROM DYNAMIC quay.io/fedora > COPY --from-buildroot /build/target/release/myapp /usr/bin/myapp > ``` > > Where the `DYNAMIC` part here opts-in to dynamic linking like flatpak, and the overlayfs is dynamic instead of static. Having a couple of user containers using podman now occupying a lot of space in my user home, I would appreciate this option. It would be *especially* nice if it were possible to *rebase* (a la git) such containers to a later fedora release as well in time [I am ok if the rebase fails and I have to revert]. Simo. -- Simo Sorce RHEL Crypto Team Red Hat, Inc _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
