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Modularity in the Cloud
- 1. Modularity in the cloud A case study
- 2. Jan Willem Janssen Luminis Technologies @j_w_janssen Sander Mak Luminis Technologies @sander_mak http://branchandbound.net
- 3. The case: PulseOn Educational system focussed on personalized learning Used in high schools in the Netherlands Expand to other countries in the near future
- 4. Requirements Easy software updates Cross device iPad/android/ desktop... Different set of components per school Scalability (both up and down)
- 8. How to build software when nobody can tell you exactly what to build?
- 9. Divide and conquer, prevent the ripple effect Modularity
- 10. Modularity in practice Program to interfaces, not implementations Rate of change of modules http://geekandpoke.typepad.com
- 11. Modules
- 12. Ok, but how to create an instance of a hidden class? MyInterface myI = new MyImplementation(); YOU DON’T!
- 13. Service Lookups
- 14. Cross device HTML 5 + JS RESTful web services OSGi services Mongo Apache Felix A m d a t u S3
- 16. course.gadget contentsequencer.rest contentsequencer.engine profiling.mongo content.mongo profiling.rest AJAX AJAX Java Java Java Java
- 17. Some numbers 190 bundles in a deployment 120 PulseOn bundles
- 18. Amdatu: OSGi Cloud components JAX-RS Mongo DB BlobStores Scheduling Multi-tenancy Search OpenSocial ... Apache Licensed open source project
- 19. Amdatu MongoDB Most data is exposed using REST The profiler generates a LOT of data The recommender needs powerful queries
- 20. Amdatu OpenSocial How to separate UI elements in modules? Each functional part is an OpenSocial gadget Modularity in the UI
- 21. School B Load Deployment Load Balancer PulseOn node PulseOn node PulseOn node Load Balancer PulseOn node PulseOn node PulseOn node School A Mongo Mongo Mongo Mongo Mongo Mongo
- 22. Auto scaling Considerable higher loads during school hours Enough capacity Without paying for idle servers at night...
- 23. Load Balancer small node Cluster per school Always use a load balancer because we don’t want downtime during scaling
- 24. Load Balancer small node Early morning...
- 25. Load Balancer small node large node large node Early morning...
- 26. End of the day... Load Balancer small node large node large node
- 27. End of the day... Load Balancer small node
- 28. But how do we install our software on a node?
- 30. ace screenshot
- 31. Node AWS Auto Scaling 1. Start Load Balancer Apache ACE 4. register 2. register 3. provision deployment package Provisioning servers
- 32. Tooling and frameworks are now mature enough How does this fit other applications? The architecture fits most modern web applications Works in the cloud (but not a requirement)
- 33. amdatu.org
- 34. Cloud provisioning http://ace.apache.org/ Cloud OSGi services http://www.amdatu.org/ Eclipse OSGi plugin http://bndtools.org/ @Sander_Mak http://luminis.eu/en/ There is more...