The document discusses how Fedora uses modularity to allow systems to move both fast and slow at the same time. It introduces modules as logical groups of packages that can have independent lifecycles and multiple streams. This allows applications and dependencies to be updated at different rates. Containers are also discussed, and it is recommended to build containers using Linux distributions for security and to inherit packaging and lifecycle benefits. A demo of modules and containers in Fedora is included.

1. Presented by Adam Samalik
Moving Fast and Slow at the Same Time:
Lifecycle Commitments Across Major
OS Releases

3. 1. Benefits of Linux Distributions
2. Fedora Modularity (+ demo)
3. Modularity and containers (+ demo)
4. Questions & answers
Agenda

4. Benefits of
Linux distributions

5. Packaging
makes software
integrated, tested, updated,
and easily installable.

6. Lifecycle
brings an over-time stability
to the diverse
open source world.

7. maintenance timeline
Application v1
Application v2
Language runtime A
Language runtime B
Library foo Library foo even better
Upstream lifecycle diversity
Library foo better

8. maintenance timeline
Application v2
Language runtime B
Library foo better
Linux distribution lifecycle
Application v1
Language runtime A
Library foo

9. Application v2
Language runtime B
Library foo better
Application v1
Language runtime A
Library foo
Fedora 27
Fedora 28
maintenance timeline
Linux distribution lifecycle

10. Arch Linux
CentOS
Fedora
Lifecycles of different Linux distributions
maintenance timeline

11. Lifecycle differences
are very useful, because
different people
have different needs

12. “Fedora is too fast for me.”
Lifecycle quotes
“Fedora is too slow for me.”
Quote 1:
Quote 2:

13. “Fedora is too fast for me.”
“Fedora is too slow for me.”
Can Fedora be
fast and slow
at the same time?

14. Fedora Modularity

15. Packages
are
the core building blocks
of Linux distributions.

16. Modules
are
logical groups of packages
representing an application,
or a language runtime.

17. Module benefits:
• multiple streams
• lifecycle independence
• use case-driven installation

18. Fedora 26
nodejs-6.rpm
Fedora 27
nodejs-8.rpm
Modules in Fedora
1) Traditional releases before Modularity

19. Fedora 26
nodejs-6.rpm
Fedora 27
nodejs-8.rpm
Fedora 28
nodejs-8.rpm
nodejs-10.rpm
nodejs-10.rpm
nodejs-8.rpm
nodejs-8.rpm
nodejs-6.rpm
nodejs-6.rpm
Modules in Fedora
2) Fedora 28 introduced Modularity

20. Fedora 28
nodejs-8.rpm
nodejs-10.rpm
nodejs-10.rpm
nodejs-8.rpm
nodejs-8.rpm
nodejs-6.rpm
nodejs-6.rpm
Modules in Fedora
3) Modules have multiple streams

21. Fedora 29Fedora 28
nodejs-8.rpm nodejs-10.rpm
Modules in Fedora
4) Modules have independent lifecycles
nodejs-10.rpm
nodejs-10.rpm
nodejs-8.rpm
nodejs-8.rpm
nodejs-6.rpm
nodejs-6.rpm

22. Thanks to modules,
your system can move
fast and slow
at the same time.

23. Thanks to modules,
your system can move
fast and slow
at the same time.
Packaging + lifecycle
benefits included.

24. Defaults
mean that you can
choose a specific version
only when you want to.

25. Updates
will respect your choice
and won’t upgrade to
a different stream.

26. $ modularity_demo

27. Modularity
and Containers

28. Containers
make applications more
portable by containing
their dependencies.

29. Containers
are so simple, it is
sometimes tempting to
just find one and run it.

30. Containers
are so simple, it is
sometimes tempting to
just find one and run it.
https://kromtech.com/blog/security-center/cryptojacking-invades-
cloud-how-modern-containerization-trend-is-exploited-by-attackers

31. https://kromtech.com/blog/security-center/cryptojacking-invades-
cloud-how-modern-containerization-trend-is-exploited-by-attackers
“… By pushing malicious images to a Docker Hub
registry and pulling it from the victim’s system, hackers
were able to mine 544.74 Monero, which is equal
to $90000…”

32. Build your own
containers
out of trusted binaries
with Linux distributions.

33. Custom containers
built with Linux distributions
can have the
packaging and lifecycle
benefits, too.

34. $ container_demo

35. Summary

36. 1. Linux distributions: packaging, lifecycle
2. Modules: independent, multiple streams
3. Containers: building trusted containers
Summary

37. Learn more:
docs.pagure.org/modularity
Download Fedora 28 Server Edition:
getfedora.org
Connect:
#fedora-modularity FreeNode IRC