Debian Bug report logs - #893037
Add support for diffing docker-format containers

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Message #5 received at [email protected] (full text, mbox, reply):

From: Jonathan Dowland <[email protected]>

To: Debian Bug Tracking System <[email protected]>

Subject: Add support for diffing docker-format containers

Date: Thu, 15 Mar 2018 20:24:10 +0000

Package: src:diffoscope
Severity: wishlist


It would be nice if diffoscope could diff against docker containers available
on the local system.


-- System Information:
Debian Release: 9.3
 APT prefers stable
 APT policy: (990, 'stable'), (600, 'unstable'), (500, 'oldstable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.14.12-x86_64-linode92 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

-- 

⢀⣴⠾⠻⢶⣦⠀
⣾⠁⢠⠒⠀⣿⡁ Jonathan Dowland
⢿⡄⠘⠷⠚⠋⠀ https://jmtd.net
⠈⠳⣄⠀⠀⠀⠀ Please do not CC me, I am subscribed to the list.

Message #10 received at [email protected] (full text, mbox, reply):

From: Chris Lamb <[email protected]>

To: Jonathan Dowland <[email protected]>, [email protected]

Subject: Re: Bug#893037: Add support for diffing docker-format containers

Date: Thu, 15 Mar 2018 22:52:40 +0000

tags 893037 + moreinfo
thanks

Hi Jonathan,

Thank you very much for the idea and wishlist bug.

> It would be nice if diffoscope could diff against docker containers available
> on the local system.

Could you briefly elaborate on what you mean here? I have a bunch of
directories under /var/lib/docker/containers -- are you wanting to
diffoscope two of these, or...? diffoscope basically works on "paths",
you see.


Best wishes,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      [email protected] / chris-lamb.co.uk
       `-

Message #17 received at [email protected] (full text, mbox, reply):

From: Juliana Oliveira <[email protected]>

To: [email protected]

Subject: Re: Bug#893037: Add support for diffing docker-format containers

Date: Thu, 22 Mar 2018 14:19:31 -0300

Hi Jonathan and Lamby,

AFAIK, docker /images/ can be exported to tarballs. Not sure how human
readable they are, but diffoscope can definitely work. (:

On Thu, 15 Mar 2018 22:52:40 +0000 Chris Lamb <[email protected]> wrote:
> tags 893037 + moreinfo
> thanks
>
> Hi Jonathan,
>
> Thank you very much for the idea and wishlist bug.
>
> > It would be nice if diffoscope could diff against docker containers
available
> > on the local system.
>
> Could you briefly elaborate on what you mean here? I have a bunch of
> directories under /var/lib/docker/containers -- are you wanting to
> diffoscope two of these, or...? diffoscope basically works on "paths",
> you see.
>
>
> Best wishes,
>
> --
> ,''`.
> : :' : Chris Lamb
> `. `'` [email protected] / chris-lamb.co.uk
> `-
>
>

-- 

Juliana

Message #22 received at [email protected] (full text, mbox, reply):

From: Chris Lamb <[email protected]>

To: [email protected]

Cc: Jonathan Dowland <[email protected]>, Juliana Oliveira <[email protected]>

Subject: Re: Add support for diffing docker-format containers

Date: Wed, 28 Mar 2018 17:25:08 +0100

Juliana wrote:

> AFAIK, docker /images/ can be exported to tarballs. Not sure how human
> readable they are, but diffoscope can definitely work. (:> 

Indeed that would definitely work. However, the "REPL" for someone
doing this would inevitably involve someone scripting the export of
two images and then runnning diffoscope against them, instead of
simply knowing how to carve them out of, say, Docker to begin with.

This seems a little at odds with diffoscope's idea of making the
whole process of diffing two things much more usable.

Whilst my gut was initially against it, perhaps some kind of "magic"
paths (or URI scheme) would work here.

(Inspired by IRC conversation with Jon right now)


Best wishes,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      [email protected] / chris-lamb.co.uk
       `-

Message #27 received at [email protected] (full text, mbox, reply):

From: Jonathan Dowland <[email protected]>

To: [email protected]

Subject: Re: Bug#893037: Add support for diffing docker-format containers

Date: Thu, 29 Mar 2018 20:15:58 +0100

I poked a bit at how docker's overlay2 driver stores the layers and came
up with this temporary hack script

> #!/bin/sh
> set -u
> set -e
> 
> if [ $# -lt 2 ]; then
>     echo usage: $0 before after
>     exit 1
> fi
> 
> before="$1"
> after="$2"
> 
> bfs=$(docker inspect -f '{{ .GraphDriver.Data.UpperDir }}' "$before")
> afs=$(docker inspect -f '{{ .GraphDriver.Data.UpperDir }}' "$after")
> 
> diff -ruN "$bfs" "$afs"

-- 

⢀⣴⠾⠻⢶⣦⠀
⣾⠁⢠⠒⠀⣿⡁ Jonathan Dowland
⢿⡄⠘⠷⠚⠋⠀ https://jmtd.net
⠈⠳⣄⠀⠀⠀⠀

Message #32 received at [email protected] (full text, mbox, reply):

From: Chris Lamb <[email protected]>

To: Jonathan Dowland <[email protected]>, [email protected]

Subject: Re: Bug#893037: Add support for diffing docker-format containers

Date: Sun, 02 Dec 2018 11:30:14 -0500

Jonathan Dowland wrote:

> It would be nice if diffoscope could diff against docker containers available
> on the local system.

This might be useful:

  https://github.com/wagoodman/dive


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      [email protected] / chris-lamb.co.uk
       `-

Message #37 received at [email protected] (full text, mbox, reply):

From: Chris Lamb <[email protected]>

To: [email protected]

Cc: Jonathan Dowland <[email protected]>

Subject: Re: Add support for diffing docker-format containers

Date: Sat, 15 Dec 2018 16:00:45 +0100

forwarded 893037 https://salsa.debian.org/reproducible-builds/diffoscope/issues/39
thanks

I've forwarded this upstream here:

  https://salsa.debian.org/reproducible-builds/diffoscope/issues/39


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      [email protected] / chris-lamb.co.uk
       `-

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