README

About jenkins.debian.net
========================
:Author:           Holger Levsen
:Authorinitials:   holger
:EMail:            holger@layer-acht.org
:Status:           working, in progress
:lang:             en
:Doctype:          article
:License:          GPLv2

== About jenkins.debian.net

https://jenkins.debian.net is a tool for automated quality monitoring of Debian. It is *work in progress* despite being in existence since October 15th 2012.

Get the source by running `git clone https://salsa.debian.org/qa/jenkins.debian.net`. It's all in there, no (relevant) manual setup has been done besides what's in this git repository. (The irrelevant bits are some very simple configuration files containing passwords.)

The (virtualized) hardware is sponsored since October 2012 by http://www.profitbricks.co.uk - currently it's using more than hundred cores and almost 300 GB memory, thanks a lot!

Some stats are available using link:https://jenkins.debian.net/munin/jenkins-month.html[munin-plugins for jenkins].

Three persons have shell access (incl. root) to the machine: link:mailto:holger@layer-acht.org[Holger Levsen], link:mailto:helmutg@debian.org[Helmut Grohne] and link:mailto:mattia@debian.org[Mattia Rizzolo]. All of them have also access to the web intereface, where tasks like stopping and scheduling job runs can be done, also they have the rights to edit the jenkins scripts (i.e. what jenkins executes) directly, though this is limited to cases like firefighting (IOW deploying changes via the git repository are the norm). The deploying of changes is still limited to people with root powers.

== Getting involved

jenkins.debian.net is a QA resource for the whole Debian project. Please contact us (via #debian-qa on IRC or via the debian-qa mailinglist) If you / your project is interested to run tests in this setup!

If you notice some jobs has problems and you want to find out why, read <<debug,debug certain jobs>> to learn how to do debug jobs locally.

include::CONTRIBUTING[]

== Notifications

There are two types of notifications being used: email and IRC. At the end of each builds console log it says to where notifications have been sent. An address of the form 'jenkins-foo' means an IRC notification has been sent to the #foo IRC channel.

All job result notifications should be sent to https://lists.alioth.debian.org/mailman/listinfo/qa-jenkins-scm and optionally to other recipients as well.

== Jobs being run

There are over 1600 jobs being run currently. If you can think of ways to improve the usefulness of certain jobs, please do give feedback!

=== g-i-installation jobs

These jobs are deprecated, in future we will use https://openqa.debian.net instead.

Installation tests with g-i, the graphical version of d-i, the debian-installer.

=== debian-installer jobs

* 'd_i_build_$source_package'
** there is one job for each git repo referred to in http://anonscm.debian.org/viewvc/d-i/trunk/.mrconfig?view=co
** each job pdebuilds the master branch of its git repo on every git push in a sid environment. (If the architecture(s) specified in debian/control are not amd64,all or any the build exits cleanly.)
** while these jobs are triggered on commits, the SCM is only polled every 6min to see if there are new commits.

* 'd_i_manual'
** builds the full installation-guide package with pdebuild in sid on every commit to svn://anonscm.debian.org/svn/d-i/ matching suitable patterns.
** while this job is triggered on commits, the SCM is only polled every 15min to see if there are new commits.

* 'd_i_manual_$language_html'
** builds a language (on buster) on every commit of svn/trunk/manual/$LANG with `make languages=$LANG architectures=amd64 formats=html`.
** while these jobs are triggered on commits, the SCM is only polled every 15min to see if there are new commits.
** on successful build, 'd_i_manual_$lang_pdf' is triggered.

* 'd_i_parse_build_logs' - parses logs from http://d-i.debian.org/daily-images/build-logs.html daily, to give them a bit more exposure.
** this job is run daily.

=== chroot-installation jobs

Installation tests inside chroot environments.

* 'chroot-installation_maintenance_$distro':
** make sure chroots have been cleaned up properly
** sid jobs are run daily at 04:30 UTC and triggers the $distro specific bootstrap job on success
** testing jobs are run every 3 days, stable ones once a week, old stable twice a month.
* $distro-bootstrap jobs:
** just `debootstrap $distro` (install a base Debian distribution $distro)
** there is one job for *sid*, one for *bullseye* and one for *buster*: 'chroot-installation_sid_bootstrap', 'chroot-installation_bullseye_bootstrap' and 'chroot-installation_buster_bootstrap'
** on successful run of the bootstrap job, six $distro-install(+upgrade) jobs are triggered.

* $distro-install jobs (and $distro-install+upgrade jobs):
** `debootstrap $distro`, install a *$set_of_packages* (and upgrade to *$2nd_distro*)
** severeal sets with different packages exist.
*** install is done with `apt-get install`, except for 'develop' where `apt-get build-dep` is used to install the build dependencies of these packages.
** Then there are also all the corresponding upgrade jobs, eg 'chroot-installation_buster_install_gnome_upgrade_to_bullseye'

=== Debian Edu related jobs

* All Debian Edu related jobs can be seen at these two URLs:
** https://jenkins.debian.net/view/edu_devel/ about Debian Edu Buster
** https://jenkins.debian.net/view/edu_stable/ about Debian Edu Stretch

* Then there are three types of jobs:
** 'g-i-installation_$(distro)_$(profile)':
*** tests installation of a profile with preseeding in the graphical installer,
*** screenshots and logs are preserved and a movie created,
*** testing clients against the main-server is planned too, for some time...
** 'chroot-installation_$(distro)_install_$(education-metapackage)':
*** tests apt installation of a metapackage in a specific distro.
* 'edu-packages_$(distro)_$(src-package)':
** builds one of the six debian-edu packages ('debian-edu', 'debian-edu-config', 'debian-edu-install', 'debian-edu-doc', 'debian-edu-artwork', 'debian-edu-archive-keyring' on every push to it's git master branch
** and whenever 'debian-edu-doc' is build, https://jenkins.debian.net/userContent/debian-edu-doc/ gets updated automatically afterwards too.

=== qa.debian.org related jobs

* There are jobs for lintian and for piuparts:
** they simply run a build and/or the tests of the master branch of their git repository on every commit against sid. If that succeeds, the same source will be built on bullseye, then on buster and - in the lintian case only - also for stretch-backports.
* There are also jobs related to link:https://udd.debian.org[UDD]:
** they check for multiarch version screws in various suites or issues with orphaned packages without the correct the relevant bug.
*** the UDD schema is available at https://udd.debian.org/schema/udd.html
* Last but not least, dpkg related jobs:
** they tests for trigger cycles using data from the archive and http://binarycontrol.debian.net

=== haskell jobs

* See https://wiki.debian.org/Haskell for more information about those jobs.

=== rebootstrap jobs

* See https://wiki.debian.org/HelmutGrohne/rebootstrap for more information about these jobs.

=== reproducible builds jobs

* See https://wiki.debian.org/ReproducibleBuilds to learn more about "Reproducible Builds" in Debian and beyond.

* Several jobs are being used to assemble the website https://tests.reproducible-builds.org which is actually a collection of static html and log files (and very few images) being served from this host. Besides the logfiles data is stored in a database (schema description at https://tests.reproducible-builds.org/reproducibledb.html) which can be downloaded from https://tests.reproducible-builds.org/reproducible.sql.xz. (That copy is updated daily.)

* The (current) purpose of https://tests.reproducible-builds.org is to show the potential of reproducible builds for Debian - and six other projects currently. This is research, showing what could (and should) be done... check https://wiki.debian.org/ReproducibleBuilds for the real status of the project for Debian!

* For Debian, four suites, 'stretch', 'buster', 'unstable' and 'experimental', are tested on four architectures: 'amd64', 'i386', 'arm64' and 'armhf'. The tests are done using 'pbuilder' through several concurrent workers: 40 for 'amd64', 24 for 'i386', 32 for 'arm64' and 52 for 'armhf', which are each constantly testing packages and saving the results of these tests. There's a single link:https://salsa.debian.org/qa/jenkins.debian.net/blob/master/bin/reproducible_build_service.sh[systemd service] starting all of these link:https://salsa.debian.org/qa/jenkins.debian.net/blob/master/bin/reproducible_worker.sh[workers] which in turn launch the actual link:https://salsa.debian.org/qa/jenkins.debian.net/blob/master/bin/reproducible_build.sh[build script]. (So the actual builds and tests are happening outside the jenkins service.)
** To shutdown all the workers use:  `sudo systemctl stop reproducible_build@startup.service ; /srv/jenkins/bin/reproducible_cleanup_nodes.sh`
** To start all the workers use: `sudo systemctl start reproducible_build@startup.service`

* These builds on remote nodes run on very different hardware:
** for 'amd64' we are using four virtual machines, profitbricks-build(1+5+11+15)-amd64, which have 15 or 16 cores and 48gb ram each. These nodes are sponsored by link:https://jenkins.debian.net/userContent/thanks.html[Profitbricks].
** for 'i386' we are also using four virtual machines, profitbricks-build(2+6+12+16)-i386, which have 10 or 9 cores and 36gb ram each. pb2+12 run emulated AMD Opteron CPUs and pb6+16 Intel Xeon CPUs. These nodes are also sponsored by link:https://jenkins.debian.net/userContent/thanks.html[Profitbricks].
** for 'arm64' we are using eight "moonshot" sleds, codethink-sled9-15-arm64, which have 8 cores and 64gb ram each. These nodes are sponsored by link:https://jenkins.debian.net/userContent/thanks.html[Codethink].
** To test 'armhf' we are using 24 small boards hosted by vagrant@d.o:
*** six quad-cores (cbxi4a, cbxi4b, ff4a, jtx1a, jtx1b, jtx1c) with 4gb ram,
*** one hexa-core (ff64a) with 2gb ram,
*** three octo-cores (odxu4a, odxu4b and odxu4c) with 2gb ram,
*** twelve quad-cores (wbq0, cbxi4pro0, ff2a, ff2b, odu3a, opi2a, opi2b, opi2c, jtk1a, jtk1b, p64b and p64c) with 2gb ram, and
*** two dual-core (bbx15 and cb3a) with 2gb ram each.
* We would love to have more or more powerful ARM hardware in the future, if you can help, please talk to us!

* Packages to be build are scheduled in the database via a scheduler job, which runs every hour and if the queue is below a certain threshold schedules four types of packages:
** new untested packages (either uploaded to 'unstable' or 'experimental' or migrated to 'buster' or 'stretch'),
** new versions of existing packages, which were already tested - these are always scheduled, no matter how full the queue is
** old versions, already tested (at least two weeks ago)
** and also some old versions which failed to build (at least ten days ago), if no bug has been filed.

* Several other jobs exist to build the HTML pages and to create two JSON files which can be downloaded from https://tests.reproducible-builds.org/reproducible.json and https://tests.reproducible-builds.org/reproducible-tracker.json. The 1st one has all the data (except history) and the 2nd has all the data we consider relevant to bother maintainers with, that is, some ftbfs isses are excluded.

* Information from https://salsa.debian.org/reproducible-builds/reproducible-notes is incorporated on pushes to that git repo.

* There are suite specific jobs to create the pbuilder base.tgz's per suite, which have the reproducible apt repo added. Similarly there's another job per suite to create the schroots used by the builder jobs to download the packages sources to build.

* Then there are two more jobs to create sid and testing schroots to run diffoscope on the the two results. This is necessary since to investigate haskell binaries, diffoscope needs access to the same haskell compiler version as the investigated packages have been built with.

* For making sure things are considerably under control at any time, there is a maintenance job running every 3h, mostly doing cleanups.

* The jenkins job overview at https://jenkins.debian.net/view/reproducible/ probably makes it clearer how the job scheduling works in practice.

* If you are in the reproducible team you can reschedule packages by yourself:
** log into alioth.debian.org via ssh, in the team home (/home/groups/reproducible/) there is a reschedule.sh script you can call. Use the --help switch to get the online help.
** The team IRC channel will get a notification about the scheduling and optionally when the build finishes too.

* If you are not in the reproducible team or if you want to reschedule big sets of packages please ask for a manual rescheduling in the '#debian-reproducible' IRC channel on OFTC. Those with shell access to jenkins can bypass the limitations imposed to remote calls, which are limited to 500 schedulings per day, which should be plenty for normal usage.

* Blacklisting packages can be done similarly:

----
jenkins@jenkins:~$ /srv/jenkins/bin/reproducible_blacklist.sh $suite $package1
----

* We support sending automatic link:https://tests.reproducible-builds.org/index_notify.html[email notification] for status changes to maintainers. Enabling/disabling these notifications can be done by people with shell access to jenkins:

----
jenkins@jenkins:~$ /srv/jenkins/bin/reproducible_setup_notify.py -h
usage: reproducible_setup_notify.py [-h] [-o] [-p PACKAGES [PACKAGES ...]]
                                    [-m MAINTAINER]
  -h, --help            show this help message and exit
  -o, --deactivate      Deactivate the notifications
  -p PACKAGES [PACKAGES ...], --packages PACKAGES [PACKAGES ...]
                        list of packages for which activate notifications
  -m MAINTAINER, --maintainer MAINTAINER
                        email address of a maintainer
----

* Job configuration is at the usual location for 'jenkins.debian.net': there's a 'job-cfg/reproducible.yaml' defining all the jobs and lots of scripts in 'bin/reproducible_*.(sh|py)', plus a few config files like for 'sudo' or 'apache2'.

* Finally, there are also jobs testing the link:http://www.coreboot.org/[coreboot], link:https://openwrt.org/[OpenWrt], link:http://www.netbsd.org/[NetBSD] and https://www.freebsd.org/[FreeBSD] projects. The results of the tests can be seen respectively at https://tests.reproducible-builds.org/coreboot/, https://tests.reproducible-builds.org/openwrt/, https://tests.reproducible-builds.org/netbsd/ and https://tests.reproducible-builds.org/freebsd/.

=== jenkins.d.n jobs

These are jobs for making sure jenkins.debian.net is running smoothly.

[[debug]]
== Debugging certain jobs

To debug most jobs, a jenkins setup is actually not needed.

* In principle the shell commands from the various jobs should run on any Debian system just fine. Please use a test system though, as all your data might be eaten.

** A good first step is to use this git repo as a Debian source package, build it and then install the jenkins.d.n-debug package and all it's recommends on your test system. NOTE: this ain't as helpful as it used to be as many depends have only been added to 'update_jdn.sh' and not to 'debian/control'.

=== Feedback

We love to get feedback on this! Either by sending an email to debian-qa@lists.debian.org or by joining #debian-qa on irc.debian.org and expressing yourself there. The best way is to link:https://bugs.debian.org/jenkins.debian.org[report bugs], even better if accompanied by patches or pull requests. But really, all feedback is appreciated!

=== Setup

See link:https://jenkins.debian.net/userContent/setup.html[INSTALL].

=== ToDo

There is still a lot of work left, check the current link:https://jenkins.debian.net/userContent/todo.html[ToDo list].

=== Thanks

See link:https://jenkins.debian.net/userContent/thanks.html[THANKS].

== License

** GPLv2, see link:https://salsa.debian.org/qa/jenkins.debian.net/blob/master/LICENSE[LICENSE].

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