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OSGi And Private Clouds: How Modular Software Can Help Build Scalable Internal Clouds
- 1. David Savage | Paremus Ltd OSGi And Private Clouds
- 2. Agenda • Cloud computing today • OSGi and the Cloud? • Challenges of OSGi and the Cloud • OSGi Cloud platform + demo • Conclusion • Questions?
- 4. Why cloud? • Gives you - just in time: – Processing power – Storage capacity – Network capacity
- 5. Cloud Realities • Multiple APIs (e.g. Data Access) • Limited APIs – Google = No threads (for example) • Course grained @ scale VM image • Not infinite resources – Contention – Latency
- 6. Why Private Cloud? • Data ownership risks • Data inertia – difficult to move once you start • API lock-in – difficult to move to another provider • SLA – if the $%&£ hits the fan can I spin up fast enough?
- 7. Are we here?
- 8. Or are we here?
- 9. How do we get here? Credit: NASA/ESA
- 10. OSGi and the Cloud
- 11. OSGi a quick review • Standard since 1999 • Modules • Lifecycle • Services
- 12. An uncomfortable truth? • Lines of code double every 7 years • 50% of development time spent understanding code • 90% of software cost is maintenance & evolution 2003 2010 2017 1989 1996 1975 1982 Source: Burton Group Analyst Kirk Koernschild - http://techdistrict.kirkk.com/
- 13. Types of scale • Operational • Architectural • Administrative Credit: NASA/ESA
- 14. Are we dealing with scale? • Operational ✓ • Architectural ? • Administrative ? Credit: NASA/ESA
- 15. OSGi Cloud benefits • Customisation • Dynamic • Lightweight • Self-describing
- 16. OSGi Cloud services? • MapReduce service • Batch services • NoSQL services • Communications services • Social networking services • Billing services • AJAX/HTML 5.0 services
- 18. OSGi is complex? • Classloading • Meta data • Availability
- 19. OSGi Alternatives • VM Images • WARs/EARs • Jigsaw/QWYLT
- 20. An OSGi Cloud Platform credit: somadjinn@deviantart.com
- 21. RFP 133 – Cloud Computing • Run by the OSGi Alliance • Relevant OSGi technologies: – Remote Services – OSGi Bundle Repository – Subsystems – Configuration Admin – Generic Capabilities
- 22. Nimble a quick overview • Bundles • Repositories • Resolver • Shell Administrator Version Author Client
- 23. Service Fabric a quick overview • Nimble • Management • Systems • Provisioning
- 24. OSGi Cloud Demo
- 25. What I'm going to demo • GWT stock quote example from “OSGi In Action” deploy using Nimble • Deploy web front end + dependencies • Deploy back end on single vm • Use fabric to scale up/down number of back end services
- 26. Pictures tell a thousand words Service Fabric Stock Service Machine JVM GWT WAB OSGi Stock Remote Service JVM OSGi Remote Service Service Stock Service Stock Service Stock Service Stock Service
- 27. Conclusion
- 28. OSGi Cloud benefits • Modular • Dynamic architecture • Self-describing • Lightweight
- 29. Cloud engineering • Simplicity by encapsulation • Flexibility by abstraction • Architecture must cope with change Credit: NASA/ESA
- 30. Questions
- 31. Contact • Web: http://www.paremus.com • Email: david.savage@paremus.com • Blog: http://chronological- thought.blogspot.com • Twitter: @davemssavage • Book: OSGi in Action (Manning Ltd)