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From: zimoun <zimon.toutoune@gmail.com>
To: Stephen Scheck <singularsyntax@gmail.com>
Cc: help-guix <help-guix@gnu.org>
Subject: Re: Guix Docker image inflation
Date: Sun, 31 May 2020 20:33:21 +0200	[thread overview]
Message-ID: <CAJ3okZ1RfzqtCtzd2zBDmEMroL-V1-5vscmAZVofbBCEpGy11w@mail.gmail.com> (raw)
In-Reply-To: <CAKjnHz0ngmPC3dYu6czZTLAbXMyw7HfXiLr4fhdTyDiUo42vdA@mail.gmail.com>

Dear Stephen,

On Sun, 31 May 2020 at 19:51, Stephen Scheck <singularsyntax@gmail.com> wrote:

> But I'm now starting to doubt my whole approach because it seems like
> there are some fundamental GC problems with running a live Guix system
> inside a container.

I do not think it is "some fundamental GC problems with running a live
Guix system inside a container" but it is a fundamental Docker
filesystem design which is incompatible with your approach.  As I have
tried to show, the issue is:

$ CONTAINER=`docker run --detach --tty --privileged image0`
$ docker exec --interactive --tty $CONTAINER /bin/sh
/ # dd if=/dev/urandom of=/data1 bs=1234567 count=1024
$ HASH=`docker commit $CONTAINER` && docker tag $HASH image1

$ CONTAINER=`docker run --detach --tty --privileged image1`
$ docker exec --interactive --tty $CONTAINER /bin/sh
/ # rm /data1
/ # dd if=/dev/urandom of=/data2 bs=1234567 count=1024
$ HASH=`docker commit $CONTAINER` && docker tag $HASH image2

$ CONTAINER=`docker run --detach --tty --privileged image2`
$ docker exec --interactive --tty $CONTAINER /bin/sh
/ # rm /data2
/ # dd if=/dev/urandom of=/data3 bs=1234567 count=1024
$ HASH=`docker commit $CONTAINER` && docker tag $HASH image3

etc.

And all the resulting images are bigger and bigger.  Do I misread something?

Maybe "docker export | docker import" should help to keep the size
"reasonable" even if I am not convinced...


Well, thank you for raising the issue, because I have learnt
interesting stuff about Docker. :-)
And I do not have yet something concrete to say about your initial issue, sorry.


All the best,
simon

next prev parent reply	other threads:[~2020-05-31 18:34 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-27 19:41 Guix Docker image inflation Stephen Scheck
2020-05-28 18:10 ` Leo Famulari
2020-05-29 16:19   ` Stephen Scheck
2020-05-29 17:08     ` Leo Famulari
2020-05-29 17:56       ` Stephen Scheck
2020-05-29 18:02         ` Leo Famulari
2020-05-29 18:21           ` Marius Bakke
2020-05-29 18:37             ` Leo Famulari
2020-05-29 18:44               ` zimoun
2020-05-29 21:24                 ` Stephen Scheck
2020-05-29 18:29           ` Stephen Scheck
2020-05-29 17:12     ` zimoun
2020-05-29 17:36       ` Stephen Scheck
2020-05-29 18:08 ` zimoun
2020-05-29 18:47   ` Stephen Scheck
2020-05-29 20:02     ` zimoun
2020-05-29 21:04       ` Stephen Scheck
2020-05-29 21:54         ` zimoun
2020-05-29 22:11           ` Stephen Scheck
2020-05-29 23:30 ` Chris Marusich
2020-05-29 23:55   ` zimoun
2020-05-30 17:13     ` Stephen Scheck
2020-05-31  9:37       ` zimoun
2020-05-31 18:30         ` Stephen Scheck
2020-05-31 18:51           ` zimoun
2020-05-31 19:43             ` Stephen Scheck
2020-05-31 23:27               ` zimoun
2020-05-31 21:04           ` Chris Marusich
2020-06-01  0:37             ` zimoun
2020-05-30 17:02   ` Stephen Scheck
2020-05-31  4:31     ` Chris Marusich
2020-05-31  9:08       ` zimoun
2020-05-31 17:50       ` Stephen Scheck
2020-05-31 18:33         ` zimoun [this message]
2020-05-31  8:24     ` zimoun
2020-05-31 10:50       ` Vincent Legoll
2020-05-31 17:58         ` zimoun

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