Stable:2.0 Assistant: Stable:2.0 ... User Branches home:userA:branches:Tumbleweed home:userA:branches:Tumbleweed

1. Develop and Maintain a Distro with
Open Build Service
Gary Lin
Software Engineer, SUSE Labs
glin@suse.com

2. Open Build Service?
Open Build Service (OBS) is an open source
project initiated by SUSE to create a generic
build system to build and distribute packages
from sources in an automatic, consistent and
reproducible way.

3. Basic Idea
Source code
Patches Package
OBS (RPM,
DEB, ...)
Changelog
Whatever

4. Supported Distributions

5. Supported Architectures
● i586
● x86-64
● PowerPC 32
● PowerPC 64
● IA64
● ARMv7
● ARMv5

6. How OBS works

7. Project and Package
● Project
– Each project contains the resources needed to build
one or more packages.
– These resources include source archives, patch files,
spec files, etc.
– The project defines the build architectures and the
general settings.
● Package
– The packages are the build targets of the project.
– The package format could be any supported output
format, e.g. RPM or DEB.

8. Frontend – Web UI

9. Frontend - Commandline

10. Frontend to Backend
Frontend Requests
Create a package/project
Query packages/projects
Check in/modify sources
Backend
Servers
Delete a package
...
Submit changes

11. Backend Components
scheduler scheduler publish
i586 x86_64
s job descriptions
nt
eve
dispatcher srcserver publisher
s
rce
s ck age
jobs sou pa
download
worker rep server
server
warden
dep packages
signer
...
...
...
build results download
worker rep server
server

12. Collaboration

13. branch
Project A home:userA:branches:ProjectA
Project Settings
Project Settings Project Settings
Project Settings
Build Architectures
Build Architectures Build Architectures
Build Architectures
Package
Package (Package)
Diff
Diff

14. submitrequest
Project A home:userA:branches:ProjectA
Package
Package Package
Diff
Diff Diff
Diff

15. Real-life case: openSUSE

16. Current Release
● All packages are in the release project and the
update project, e.g. openSUSE:12.1 and
openSUSE:12.1:Update.
● Each package update must be reviewed by
the maintenance team and then be submitted
to the update project.
● In general, every update has to be tracked by
a bugzilla entry.

17. Maintenance Process
openSUSE 12.1:Update
openSUSE 12.1:Update openSUSE:Maintenance:IDXXX
openSUSE:Maintenance:IDXXX
packageA patchInfo packageA
m
br mr
an
ch
home:userA:branches:
home:userA:branches:
openSUSE 12.1
openSUSE 12.1 openSUSE:12.1:Update
openSUSE:12.1:Update
packageA patchInfo packageA

18. Next Release
● The packages for the next release are in the
“factory” project, e.g. openSUSE:Factory.
● All developments are happened in the “devel”
projects.
● The package updates are reviewed by the
devel project maintainers.
● Any modification is allowed as long as the
maintainer agrees.

19. openSUSE Factory
Next Release
openSUSE:Factory
openSUSE:Factory
Devel Projects
Base:System
Base:System Gnome:Factory
Gnome:Factory Gnome:Apps
Gnome:Apps X11:XOrg
X11:XOrg
...
User Branches sr
branch
home:userA:branches:
home:userA:branches:
Gnome:Factory
Gnome:Factory

20. Try it!
openSUSE Build Service
http://build.opensuse.org

21. Questions?

22. Thank You!

23. References
Open Build System
http://www.open-build-service.org/
Build system comparison
http://en.opensuse.org/openSUSE:Build_Service_comparison
Build Service Backend Key Components
http://en.opensuse.org/openSUSE:Build_Service_Backend_Key_Components
openSUSE Build System
https://build.opensuse.org/
openSUSE Maintenance Setup
http://doc.opensuse.org/products/draft/OBS/obs-reference-guide_draft/cha.obs.maintenance_setup.html

24. Backup Slides

25. Other Build Systems
● Fedora “Koji”
● Ubuntu “Launchpad”
● Mandriva Build System
● Project Build
● Build Bot
● Poky

26. Comparison
Name Multi- Build for other Package formats Create Images
Architecture distributions
Fedora Koji N N rpm Y
Ubuntu
Y N deb N
Launchpad
Mandriva Build
Y N rpm TODO
System
deb, rpm, ebuild,
Project Build Y Y N
pkg
Build Bot Y N N/A N
Poky Y N rpm, deb, ipg, tgz Y
Open Build rpm, deb, tgz,
Y Y Y
Service exe[*]
* experimental

27. Package Build
Build Server Local Build
Sources
Sources Sources
Sources
Dependencies
Dependencies Dependencies
Dependencies
Base Packages
Base Packages Base Packages
Base Packages
Base System
Base System chroot
chroot
qemu
qemu

28. copypac
Project A Project B
Package
Package Package
Package
Change

29. linkpac
Project A Project B
Package
Package (Package)
Diff
Diff

30. Tumbleweed
● Tumbleweed is a project based on the current
release and the “stable” projects.
● Tumbleweed is initiated and maintained by
Greg KH.

31. Tumbleweed
Tumbleweed
openSUSE:Tumbleweed
openSUSE:Tumbleweed
Stable Projects Current Release
Gnome:Stable:3.2 KDE:Release:48 ...
Gnome:Stable:3.2 KDE:Release:48 Virtualization
Virtualization openSUSE:12.1
openSUSE:12.1