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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?
about debian release names
wheezy (Debian 7) = oldstable
jessie (8) = stable
stretch (9 = testing
sid = unstable
experimental
a bit of history
and jenkins
jenkins general:
irc / mail notifications
-> bugs are getting filed
#debian-qa irc channel
debian-qa efforts "distributed"…
d-i
packages
manual
lintian
debhelper
debconf-video
debian-edu
images
packages
doc (!) 7 languages
reproducible builds
Debian, explain variations!
/who/
and qa
and ximin (pb17)
rebootstrap
jenkins team maintenance
helmut: rebootstrap
mapreri + spectranaut: reproducible Debian
fil: lvc
tnn: jenkins java support
sthibault: hurd + accessibility
steven chamberlain: kfreebsd
several: reproducible other than Debian
benefits for debian
countless bug reports
ie 2670 done ftbfs via reproducible…
early notifications of problems
announce move to j.d.o
announce new nodes by codethink
-->
<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>
jenkins.debian.net or what is Debian doing with all these ressources
</h2>
<h4>
<br>
Holger Levsen (h01ger)
</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</li>
<li>Debian contributor since 2001</li>
<li>DebConf organizer, founded the DebConf video team in 2005</li>
<li>Debian developer since 2007, <code>holger@debian.og</code></li>
<li>Debian-Edu (Debian for Education), since 2003</li>
<li>Debian-QA</li>
<li>Freelancer at Profitbricks from 2012-2015</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, has 42324234 logs from >=53158 packages in 28 suites</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>
</section>
<section data-background="images/jenkins_jobs-year.png" data-background-size="60%">
</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>Phil Hands: lvc</li>
<li>Helmut Grohne: rebootstrap</li>
<li>Samuel Thibault: hurd + accessibility</li>
<li>Steven Chamberlain: kfreebsd</li>
<li>Tomasz Nitecki: jenkins java support</li>
<li>Mattia Rizzolo, Valerie Young and others: reproducible Debian</li>
<li>several: reproducible other than Debian</li>
<li class="fragment">36 contributors to jenkins.debian.net.git in total</li>
</ul>
</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>2 datacenters (FKB + FRA)</li>
<li>17 machines (16*Debian, 1*FreeBSD, 13*64bit, 4*32bit)</li>
<li>168 cores (148 AMD, 20 Intel)</li>
<li>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</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>
Package (collection) installation tests
</h2>
<ul>
<li>338 jobs</li>
<li>wheezy (98), jessie (147), stretch (153), sid (98)</li>
<li>upgrades and new installations tested</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 too</li>
<li>creates videos and screenshots</li>
<li>plain Debian (installations and rescue mode) and Debian Edu</li>
<li>kfreebsd and hurd</li>
<li>finally almost deprecated today</li>
<li>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>
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 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>Usual thanks:</h2>
<p>
<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>
<img src="images/profitbricks.jpg">
<ul>
<li>from Debian, jenkins.debian.net would not have been possible like this without <em>your support!</em></li>
<li>from many many folks interested in Reproducible Builds</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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