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List:       opensuse-factory
Subject:    Re: Heads up: UsrMerge impact imminent
From:       Aleksa Sarai <asarai () suse ! de>
Date:       2021-06-11 12:13:44
Message-ID: 20210611121344.ajnlikxix5zgjpqd () senku
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On 2021-06-11, Neal Gompa <ngompa13@gmail.com> wrote:
> On Fri, Jun 11, 2021 at 7:15 AM Jan Engelhardt <jengelh@inai.de> wrote:
> >
> > On Friday 2021-06-11 12:55, Martin Wilck wrote:
> >
> > >On Fr, 2021-06-11 at 18:03 +1000, Aleksa Sarai wrote:
> > >>
> > >> I just ran into this bug today, and I realised that this bug actually
> > >> also affects users who run containers on *different hosts* that have
> > >> ZFS
> > >> as the backing filesystem. For instance, running Tumbleweed on Ubuntu
> > >> (which has ZFS as the default filesystem) will result in this error
> > >> being triggered. (I personally run LXD containers on openSUSE with a
> > >> ZFS
> > >> storage driver, but this same thing would happen with Docker or LXD
> > >> on
> > >> Ubuntu or any other distribution with ZFS.)
> > >
> > >You run "zypper dup" in the container? Can't you just update your
> > >container image?
> >
> > Not everything runs on orchestration where you can rebuild from scratch.
> > Think systemd-nspawn. There just is no image facility as far as that's
> > concerned. It's just you and a directory tree.
> 
> LXD is image based, just like OCI container systems are.

LXD does have images but they're not like OCI/Docker images and there
isn't a "docker build"-like ecosystem. LXD images are basically just a
tar-ified version of a distribution's root filesystem and there are no
layers.

LXD containers are managed more like VMs -- you can use other tools on
top to get a more infrastructure-as-code-style model (such as OpenShift)
but at its code LXD containers don't really have anything akin to
Dockerfiles.

-- 
Aleksa Sarai
Senior Software Engineer (Containers)
SUSE Linux GmbH
<https://www.cyphar.com/>

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