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<!doctype html>
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<title>jenkins.debian.net or what is Debian doing with all these ressources</title>
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<!--
42min :)
who are you?
who knows about Debian? ;-)
who knows about jenkins.debian.net?
jenkins general:
irc / mail notifications
-> bugs are getting filed
#debian-qa irc channel
debian-qa efforts "distributed"…
benefits for debian
countless bug reports
ie 2670 done ftbfs via reproducible… (and 500 open…)
early notifications of problems
will become an offical service, jenkins.d.o
other qa efforts
lintian.debian.org
ci.debian.net
periodic full archive rebuilds (amd64 only)
smoothen + shorten reproducible slides
-->
<body>
<div class="reveal">
<div class="slides" style="text-align: left;">
<section data-background="images/debian_logo.png" data-background-size="10%" data-background-position="90% 10%">
<h2>
about <code>jenkins.debian.net</code> - or what is Holger / Debian doing with all these ressources
</h2>
<p>(Automating all the tests!)</p>
<h4>
<br>
Holger Levsen <holger@debian.org>
</h4>
</section>
<section data-background="images/h01ger.png" data-background-size="15%" data-background-color="black">
<h2>about me</h2>
<ul class="fragment">
<li>Debian user since 1995, contributing since 2001</li>
<li>Debian-Edu (Debian for Education), since 2003</li>
<li>DebConf organizer, founded the DebConf video team in 2005</li>
<li>Debian developer since 2007, <code>holger@debian.og</code></li>
<li>Freelancer since 2004, <code>holgerlevsen.de</code></li>
<li>Freelancer at Profitbricks from 2011-2013 and 2015</li>
</ul>
</section>
<section data-background="images/h01ger.png" data-background-size="15%" data-background-color="black">
<h2>more about Debian QA and me</h2>
<ul class="fragment">
<li class="fragment"><code>https://piuparts.debian.org</code> since 2009 - today juggling with 624234 logs from 53158 packages in 28 suites with Andreas Beckmann</li>
<li class="fragment"><code>https://jenkins.debian.net</code> since 2012</li>
<li class="fragment"><code>https://reproducible.debian.net</code> since 2014</li>
<li class="fragment">since 2015 funded by the Linux Foundation for working on <code>https://reproducible-builds.org</code></li>
</ul>
</section>
<section data-background="images/debian-jenkins.png" data-background-size="10%" data-background-position="90% 10%">
<h2>
about jenkins.debian.net
</h2>
<ul>
<li>ressources sponsored by Profitbricks since 2012</li>
</ul>
</section>
<section data-background="images/jenkins_jobs-year.png" data-background-size="65%">
</section>
<section data-background="images/debian-jenkins.png" data-background-size="10%" data-background-position="90% 10%">
<h2>
Profitbricks ressources used by jenkins.debian.net
</h2>
<ul>
<li>17 machines (16*Debian, 1*FreeBSD, 13*64bit, 4*32bit)<br />
in 2 datacenters (FKB + FRA)</li>
<li>168 cores (148 AMD, 20 Intel) with 498/503 GB RAM</li>
<li>2.9/3.1 TB HDD and 1.9/2 TB SDD storage</li>
<li>no static IP addresses, no idea about traffic (500gb/month?)</li>
<li class="fragment">2 DCD users: Mattia Rizzolo and me</li>
</ul>
</section>
<section data-background="images/debian-jenkins.png" data-background-size="10%" data-background-position="90% 10%">
<h2>
jenkins.debian.net contributors:
</h2>
<ul>
<li>Mattia Rizzolo, Valerie Young and others: reproducible Debian</li>
<li>Helmut Grohne: rebootstrap</li>
<li>Samuel Thibault: hurd + accessibility</li>
<li>Steven Chamberlain: kfreebsd</li>
<li>Phil Hands: lvc</li>
<li>Tomasz Nitecki: jenkins java support</li>
<li class="fragment">36 contributors to <code>jenkins.debian.net.git</code> in total</li>
</ul>
</section>
<section data-background="images/debian.png" data-background-size="10%" data-background-position="90% 10%">
<h2>
A quick detour about Debian release names
</h2>
<ul class="fragment">
<li>wheezy (Debian 7) = oldstable</li>
<li>jessie (8) = stable</li>
<li>stretch (9 = testing</li>
<li>sid = unstable</li>
<li>experimental</li>
</ul>
</section>
<section data-background="images/debian-jenkins.png" data-background-size="10%" data-background-position="90% 10%">
<h2>
chroot-installation tests
</h2>
<ul>
<li>338 jobs basically running <code>apt install $metapackages</code><br />
(gnome, kde, cinnamon, lxde, xfce, qt4, qt5, haskell, developer, debconf-video, debian-edu)</li>
<li>new installations and upgrades tested in <br />
wheezy (98), jessie (147), stretch (153), sid (98)</li>
</ul>
</section>
<section data-background="images/debian-jenkins.png" data-background-size="10%" data-background-position="90% 10%">
<h2>
g-i-installation tests
</h2>
<ul>
<li>tests Debian Installer (d-i) in graphical mode ("g-i") and text mode</li>
<li>creates videos and screenshots</li>
<li>plain Debian (installations and rescue mode) and Debian Edu</li>
<li>jessie, stretch and sid</li>
<li>linux, kfreebsd and hurd</li>
<li>finally almost deprecated today, will be replaced by lvc tests (libvirt-cucumber)</li>
</ul>
</section>
<section data-background="images/debian-jenkins.png" data-background-size="10%" data-background-position="90% 10%">
<h2>
more debian-installer related jobs on jenkins.debian.net:
</h2>
<ul>
<li>FIXME 78 packages (building udebs) triggered by commits to their git master branches</li>
<li>manual in several/FIXME languages, also git triggered</li>
<li>lvc and d-i from proposed branches planned</li>
</ul>
</section>
<section data-background="images/debian-jenkins.png" data-background-size="10%" data-background-position="90% 10%">
<h2>
$amount/FIXME debian-edu jobs on jenkins.debian.net:
</h2>
<ul>
<li>
g-i tests for jessie and stretch
</li>
<li>
six debian-edu packages build triggerd by commits on their git master branches
</li>
<li>
very useful for debian-edu-doc which is published for 7 languages in HTML, PDF & EPUB format.
</li>
</ul>
</section>
<section data-background="images/debian-jenkins.png" data-background-size="10%" data-background-position="90% 10%">
<h2>
more QA:
</h2>
<ul>
<li>debian-qa
<ul>
<li>orphaned packages without bug</li>
<li>dpkg trigger cycles</li>
<li>lintian, debhelper and piuparts are build on git commits in jessie, stretch and unstable</li>
</ul>
</li>
<li>
rebootstrap - Helmut Grohne files lots of cross-building and bootstrapping bugs
</li>
<li>
reproducible-builds.org - "btw": over 2600 'FTBFS' bugs found and fixed so far, ~400 open…
</li>
</ul>
</section>
<section data-background="images/debian-jenkins.png" data-background-size="10%" data-background-position="90% 10%">
<h2>
reproducible.debian.net
</h2>
<ul>
<li>created by 379 jobs on jenkins.debian.net</li>
</ul>
</section>
<section data-background="images/debian-jenkins.png" data-background-size="10%" data-background-position="90% 10%">
<h2>
tests.reproducible-builds.org/debian/
</h2>
<ul>
<li>created by ~350 jobs on jenkins.debian.net </li>
</ul>
</section>
<section data-background="images/rbo.png" data-background-size="25%" data-background-position="90% 10%">
<h2>The problem: why do we need reproducible builds?</h2>
<ul>
<li class="fragment">One can inspect the source code of free software for flaws</li>
<li class="fragment">But distributions provide binary/compiled packages</li>
</ul>
</section>
<section data-background="images/rbo.png" data-background-size="25%" data-background-position="90% 10%">
<h2>Can we trust this process?</h2>
<ul>
<li class="fragment">To get users, go after the developers</li>
<li class="fragment">Financial incentives to crack developer machines / build infrastructure</li>
<li class="fragment"><code>CVE-2002-0083</code>: Remote root exploit in OpenSSH (single bit difference in binary)</li>
<li class="fragment">Kernel module modifying source code when "viewed" by GCC only (see <code>media.ccc.de</code>)</li>
<li class="fragment">Compromised Apple iOS SDK, <em>Xcodeghost</em>, etc.</li>
</ul>
</section>
<section data-background="images/rbo.png" data-background-size="25%" data-background-position="90% 10%">
<h2 style="line-height: 130%;">
The motivation behind "reproducible" builds is to allow verification
that no flaws have been introduced during the compilation process.
</h2>
</section>
<section data-background="images/rbo.png" data-background-size="25%" data-background-position="90% 10%">
<h2>The solution - FIXME wordings</h2>
<ul class="fragment">
<li class="fragment">Ensure compilation always identical results</li>
<li class="fragment">Multiple parties compare compilation results</li>
<li class="fragment">Attacker needs to infect everybody simultaneously (or they are detected)</li>
</ul>
</section>
<section data-background="images/rbo.png" data-background-size="25%" data-background-position="90% 10%">
<h2>We call this <em>Reproducible Builds</em>.</h2>
<ul class="fragment">
<li class="fragment">We think this should become the norm for free software.</li>
</ul>
</section>
<section data-background="images/debian.jpg" data-background-color="black">
<h2>Reproducible builds in Debian</h2>
<p>Continuously build every package twice, varying:</p>
<ul>
<ul>
<li>Time & date</li>
<li>Hostname & domain name</li>
<li>Filesystem (<code><strike>disorderfs</strike></code>)</li>
<li>Timezone & locale</li>
<li><code>uid</code> & <code>gid</code></li>
<li>GECOS information, the shell & a bunch of environment variables </li>
<li>Kernel & CPU type</li>
<li>and more…</li>
</ul>
</ul>
</section>
<section data-background="images/rbo.png" data-background-size="25%" data-background-position="90% 10%">
<h2>Challenges</h2>
<ul>
<ul>
<li>Timestamps</li>
<li>Timezones & locales</li>
<li>Non-deterministic file ordering</li>
<li>Dictionary/hash key ordering</li>
<li>Users, groups, <code>umask</code>, environment variables</li>
<li>Build paths</li>
<li>Specifying the environment</li>
</ul>
</ul>
</section>
<section data-background="images/unstable_status.png" data-background-size="100%">
</section>
<section data-background="images/testing_status.png" data-background-size="100%">
</section>
<section data-background="images/rbo.png" data-background-size="25%" data-background-position="90% 10%">
<h2>Technical advantages</h2>
<ul>
<ul>
<li>Faster to build; saves time, money & the environment</li>
<li>Easier to test changes/revisions</li>
<li>Unsafe behaviour (eg. internet access)</li>
<li>Unreliable / non-deterministic behaviours (eg. timing)</li>
<li>Finds bugs in uncommon timezones or locales</li>
<li>Detect corrupted build environments</li>
<li>Find future build failures (eg. expired certificates)</li>
</ul>
</ul>
</section>
<section data-background="images/diffoscope.png" data-background-size="75%" data-background-position="50% 50%">
<p><!-- FIXME: this is horrible… -->
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<h2><code>https://try.diffoscope.org</code></h2>
</p>
</section>
<section data-background="images/rbo.png" data-background-size="25%" data-background-position="90% 10%">
<h2>Future work</h2>
<ul>
<li><code>.buildinfo</code> files distribution unsolved</li>
<li>How to make it meaningful for end-users</li>
<li>Source code still vulnerable</li>
</ul>
</section>
<section data-background="images/stats_bugs_sin_ftbfs_state.png" data-background-size="100%">
</section>
<section>
<h2>Beyond Debian…</h2>
<p>
<img src="images/logos/archlinux.png">
<!-- img src="images/logos/baserock.png" -->
<img src="images/logos/bitcoin.png">
<img src="images/logos/coreboot.png">
<img src="images/logos/debian.png">
<img src="images/logos/electrobsd.png">
<img src="images/logos/f-droid.png">
<img src="images/logos/fedora.png">
<img src="images/logos/freebsd.png">
<img src="images/logos/google.png">
<img src="images/logos/guix.png">
<img src="images/logos/lede.png">
<img src="images/logos/netbsd.png">
<img src="images/logos/nixos.png">
<img src="images/logos/openSUSE.png">
<img src="images/logos/openwrt.png">
<img src="images/logos/tails.png">
<img src="images/logos/tor.png">
<img src="images/logos/webconverger.png">
<div class="fragment">Reproducible Builds summits (Athens 2015, Berlin 2016)</li>
</div>
</p>
</section>
<section>
<h2>Projects using Profitbricks ressources via jenkins.debian.net</h2>
<p>works:
<img src="images/logos/coreboot.png">
<img src="images/logos/debian.png">
<img src="images/logos/freebsd.png">
<img src="images/logos/lede.png">
<img src="images/logos/netbsd.png">
<img src="images/logos/openwrt.png">
</p>
<p>worked:
<img src="images/logos/archlinux.png">
<img src="images/logos/fedora.png">
</p>
<p>work in progress:
<img src="images/logos/f-droid.png">
<img src="images/logos/guix.png">
</p>
</section>
<section data-background="images/rbo.png" data-background-size="25%" data-background-position="90% 10%">
<h2>
Ressources used by reproducible.debian.net, by architecture & sponsor
</h2>
<ul>
<li>13 amd64 systems, sponsored by Profitbricks</li>
<li>4 i386 systems, sponsored by Profitbricks</li>
<li>22 armhf systems, sponsored by vagrant@d.o, Debian & other donations</li>
<li>soon: 8 arm64 systems, sponsored by codethink.co.uk</li>
</ul>
</section>
<section data-background-color="white" data-background="images/rbo.png" data-background-size="25%" data-background-position="90% 10%">
<h2>Usually I thank:</h2>
<p style="text-align: center;">
<img src="images/cii.png">
<br>
<img src="images/lf.png">
<br>
<img src="images/profitbricks.jpg">
<br>
<img src="images/debian_logo.png">
</p>
</section>
<section data-background="images/wholeworld.jpg" data-background-size="28%" data-background-position="99% 2%">
<h2>Todays special thanks:</h2>
<p style="text-align: center;">
<img src="images/profitbricks.jpg">
<ul>
<li>from Debian, <code>jenkins.debian.net</code> would not have been possible like this without <em>your support!</em></li>
<li>from many many folks interested in Reproducible Builds!</li><!-- thanks to <em>you</em> <code>reproducible.debian.net</code>
could grow into <code>tests.reproducible-builds.org</code> so smoothly!</li> -->
</ul>
</p>
</section>
<section data-background="images/debian.jpg" data-background-color="black">
<h2 style="text-align: center;">Questions?</h2>
<br />
<br />
<table>
<tr>
<td>
<a href="mailto:holger@debian.org">holger@debian.org</a>
</td>
<td style="text-align: right;">
<code>B8BF 5413 7B09 D35C F026 FE9D 091A B856 069A AA1C</code>
</td>
</tr>
</table>
<br>
<p style="text-align: center;">
<a href="https://jenkins.debian.net/"><code>https://jenkins.debian.net</code></a>
<br>
<a href="https://reproducible-builds.org/"><code>https://reproducible-builds.org</code></a>
<br />
<br />
<br />
<br />
<br />
<br />
</p>
<p style="text-align: center;">
<small> …and many thanks to Chris Lamb for the nice slides design!</small>
</p>
</section>
</div>
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