Slides of my "modern operations with Apache Sling" presentation at http://adapt.to/ 2014

1. APACHE SLING & FRIENDS TECH MEETUP
BERLIN, 22-24 SEPTEMBER 2014
Bertrand Delacrétaz - Principal Scientist, Adobe - Apache Sling PMC member
Modern Operations with Apache Sling
@bdelacretaz - grep.codeconsult.ch - slides revision 2014-09-23

2. 2
Modern Operations?

3. modern operations with Apache Sling - @bdelacretaz - September 2014

4. tinyurl.com/slingops
modern operations with Apache Sling - @bdelacretaz - September 2014

5. modern operations with Apache Sling - @bdelacretaz - September 2014

6. modern operations with Apache Sling - @bdelacretaz - September 2014
1..N2Sling2instances

7. 7
How can Sling help?

8. Programmable
Infrastructure
Git>driven
deployments
Modern
Operations
Stateless
services
Elastic
clusters
Self>healing2
systems
modern operations with Apache Sling - @bdelacretaz - September 2014
First>class2
logs
http://12factor.net/
Immutable
services
?
Metrics
Distributed
workers
Service
discovery

9. modern operations with Apache Sling - @bdelacretaz - September 2014 We’re still exploring…
picture: mxruben on morguefile.com

10. Let’s play with this stuff
10

11. Playground:
https://github.com/bdelacretaz/docker>sling>cluster/
…
Each2box2is2a2Docker2container2
Fig2defines2the2cluster2topology2
modern operations with Apache Sling - @bdelacretaz - September 2014
Etcd2used2for2discovery

12. 12
Git-driven Sling setup

13. Sling2Crankstart2Launcher:2
Generic
Launcher
Artifacts
Repository
Single2text2file2fully2defines2a2Sling2instance
modern operations with Apache Sling - @bdelacretaz - September 2014

14. Crankstart/1
modern operations with Apache Sling - @bdelacretaz - September 2014

15. Crankstart/2
modern operations with Apache Sling - @bdelacretaz - September 2014

16. Crankstart/3
modern operations with Apache Sling - @bdelacretaz - September 2014

17. Generic
Launcher
Artifacts
Repository
Git>driven2Sling2setup!
modern operations with Apache Sling - @bdelacretaz - September 2014

18. Programmable
Infrastructure
Git>driven
deployments
Immutable
services
Experimenting2with
Modern
Operations
Stateless
services
Elastic
clusters
Self>healing2
systems
modern operations with Apache Sling - @bdelacretaz - September 2014
First>class2
logs
http://12factor.net/
Metrics
Distributed
workers
Service
discovery

19. 19
Docker and Fig

20. start.sh2(excerpts) Dockerfile
Service2discovery2
via2Docker2links2
(env.2variables)
Starting2Sling2in2a2Docker2image
modern operations with Apache Sling - @bdelacretaz - September 2014

21. fig.yml2excerpts2
fig2up2to2start2
fig2scale2sling=42to2scale
fig.yml2defines2the2cluster
modern operations with Apache Sling - @bdelacretaz - September 2014

22. https://github.com/bdelacretaz/docker>sling>cluster/
…
modern operations with Apache Sling - @bdelacretaz - September 2014
Services2launched2by2fig2
Static2discovery:2Docker2links2
Dynamic2discovery:2etcd

23. Programmable
Infrastructure
Git>driven
deployments
Immutable
services
Experimenting2with
Modern
Operations
Stateless
services
Elastic
clusters
Self>healing2
systems
modern operations with Apache Sling - @bdelacretaz - September 2014
First>class2
logs
http://12factor.net/
Metrics
Distributed
workers
Service
discovery

24. 24
So, what’s missing?

25. modern operations with Apache Sling - @bdelacretaz - September 2014
Get2configs2from2
environment2
variables.2
Reconnect2without2
interruption2if2
backend2changes.
Dynamic2service2discovery2needs2some2work

26. // Code from Sling’s NodeTypeBasedRenderingTest
uploadTestScript(scriptPath, "nodetype-and-path.esp", “html.esp”);
!
// next request might hit a different Sling instance which
// does not see the changed content yet
String content = getContent(testNodeUrl + ".html", CONTENT_TYPE_HTML);
Eventual2consistency2impacts2applications
modern operations with Apache Sling - @bdelacretaz - September 2014

27. While2moving2from2
C12to2C2,2the2same2
content2might2be2
exposed2to2two2
different2versions2
of2your2application.
Old2app New2app
Continuous2deployment2requires2interoperability
modern operations with Apache Sling - @bdelacretaz - September 2014

28. Programmable
Infrastructure
Git>driven
deployments
Immutable
services
Experimenting2with
Modern
Operations
Stateless
services
Elastic
clusters
Self>healing2
systems
modern operations with Apache Sling - @bdelacretaz - September 2014
First>class2
logs
http://12factor.net/
Metrics
Distributed
workers
Service
discovery
Not2too2bad…the2devil2is2in2the2details!

29. 29
Conclusions

30. No2major2problems2with2Sling2in2
modern2operations.2
Runtime2assembly2might2help.2
Dynamic2backend2discovery2
needs2testing,2OSGi2helps.2
Programmable,2elastic,2dynamic2
deployments2become2the2norm.2
Applications2might2need2some2
work:2eventual2consistency,2
interoperability2of2versions.
https://github.com/bdelacretaz/docker>sling>cluster/
tinyurl.com/slingops
modern operations with Apache Sling - @bdelacretaz - September 2014