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Re: Docker image sizes
From: |
Edouard Klein |
Subject: |
Re: Docker image sizes |
Date: |
Sat, 17 Jul 2021 16:10:39 +0200 |
User-agent: |
mu4e 1.4.15; emacs 27.2 |
Hi !
You can use guix graph to see what depends on what, and find out why a
specific dependency is needed:
https://guix.gnu.org/manual/en/html_node/Invoking-guix-graph.html
I just invoked:
guix graph elixir > /tmp/toto.dot
and by manually inspecting the dot file I can see that e.g. webkit is needed
by wxWidgets, whether you need those or not is up to you.
You can generate the visual graph with
dot -T pdf < /tmp/toto.dot > /tmp/toto.pdf
I'm looking at it right now, and I see that elixir depends on erlang and
git, and that git is pulling perl with it.
I doubt that's needed, so maybe you can create a new package
"lean-elixir", and forego the dependency on git somehow ? If you cut a
branch early in the DAG you may get huge returns on investment,
size-wise.
This may not be the best approach, maybe some wizards here will have
better ideas.
Cheers,
Edouard.
TJ writes:
> Hi,
>
> I was trying to package a project in docker and to start I did a fairly
> straightforward command:
>
> $ guix pack --format=docker elixir
>
> It generated an image quite a bit larger than I expected.
>
> -r--r--r-- 2 root root 461M Dec 31 1969
> gfnqg760z22vr8kbvyzdzhs1hc5766c9-elixir-docker-pack.tar.gz
>
> After uncompressing, this is taking 1.5GB and is including quite a few
> unnecessary packages for a minimal image - see below for the top 30.
>
> $ du -s * |sort -g -r | head -n 30
> 155804 g3idjpqsp2p2d163qfzskxj4k58nrx7f-llvm-11.0.0
> 145164 m59c9hj9d4n65maimbpmx2xq56d2mvqs-mesa-20.2.4
> 111708 q233v022vziq8ry18y8q959k110vclvf-webkitgtk-2.32.1
> 110840 cgqj7xswlpvhzxwri3mcqfs1fhbgnka8-erlang-23.2.1
> 103940 qk5v5vzwfl066zch67nxlv4x7aspf0fx-samba-4.13.4
> 93972 cw8brvxkzp4kmdqldsv1wkvi2cv4kq4x-python-3.8.2
> 64620 8zvc5mvk0xm3ygrxsgpyy5ilxb5rzjry-perl-5.30.2
> 56300 18hp7flyb3yid3yp49i6qcdq0sbi5l1n-guile-3.0.2
> 52748 nscar35x261xky08qih2ddxq1b105qwd-gtk+-3.24.24
> 41092 fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31
> 39544 2wqjj3mkqdvsvksndr2hpjpi7qqwi7kr-icu4c-66.1
> 35848 fi1mdh30b5q6zvplvayn68lb575xcd1k-ghostscript-with-cups-9.52
> 34768 01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib
> 34188 wjmydimw608k61qxmsifkam11jwgpric-wxwidgets-3.0.5.1
> 24224 jv6v8p8jbjf6hpscgp3dgdfylrdhldi1-gdk-pixbuf+svg-2.40.0
> 18488 n8awazyldv9hbzb7pjcw76hiifmvrpvd-coreutils-8.32
> 18464 57xj5gcy1jbl9ai2lnrqnpr0dald9i65-coreutils-8.32
> 16596 jsqxxnaj5p8a22mrsvl679gi7jl26z4j-glib-2.62.6
> 16400 aza259fsrb841zwb4rjzfzs2nrsf28f1-eudev-3.2.9
> 16060 9z185s19zp2p9yq8gdayxgibaphxfcps-cups-2.3.3
> 15604 4l2il4wcxjb443xwc2arwixpq28pbfvl-cups-minimal-2.3.3
> 14140 02z5vgdhgxw4gcjvhx51mvy1ax4lzxmp-fftwf-3.3.8
> 13912 zzkly5rbfvahwqgcs7crz0ilpi7x5g5p-ncurses-6.2
> 13096 lv92cmzqjpb8mxygpqdvh0mkkkfi9vmz-libxcb-1.14
> 10876 n3pjsbpd51x6vqikfglmrdbijflammf6-gst-plugins-base-1.18.2
> 10588 sayvymkqjl328rsivzlp9r46337rvdmz-pulseaudio-14.0
> 10084 7y3lvk3xf4im8n44337mc6y0ccysvfia-font-dejavu-2.37
> 9888 hr1p9l1waam8lk2csdwbzaipf14h9n33-gstreamer-1.18.2
> 9576 a45p39mgqvfd8kjwibyr0q42k1mw7gmf-util-linux-2.35.1-lib
> 8812 z3vbqvpgcz7lag9qci074hjry4j3120i-shared-mime-info-1.15
>
> I wouldn't expect to need llvm, mesa, webkit, samba, python, perl, gtk, cups,
> pulseaudio, etc, etc. in a production image.
>
> What would be the recommended way to minimize the derivation?
>
> Thanks,
>
> TJ