Intro to Knative
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Knative builds on Kubernetes and Istio to provide "PaaS-like abstractions" that raise the level of abstraction for specifying, running, and modifying applications. Knative includes building blocks like Knative Serving for autoscaling container workloads to zero, Knative Eventing for composing event-driven services, Knative Build for building containers from source, and Knative Pipelines for abstracting CI/CD pipelines. While Knative can run any type of container, its building blocks help enable serverless-style functions by allowing compute resources to scale to zero and be driven by event loads.
Intro to Knative
- 2. Christian Posta Chief Architect, cloud application development Twitter: @christianposta Blog: http://blog.christianposta.com Slides: http://slideshare.net/ceposta • Author “Microservices for Java developers” and “Introducing Istio Service Mesh” • Committer/contributor lots of open-source projects • Blogger, speaker, mentor, leader
- 4. Kubernetes Established primitives for deploying and managing container workloads at scale
- 5. Istio How workloads interact with each other over the network in a secure, reliable, observable way
- 6. Knative “PaaS” like abstractions on top of Kubernetes that leverage Istio and raise the level of abstraction for specifying, running, and modifying applications
- 9. Well… WTF is “serverless”? @christianposta
- 10. @christianposta Serverless: outsourcing core infrastructure services to cloud providers and stitching it all together through APIs (and functions) to deliver business value
- 12. ● Per-request billing / pay as you go ● Typically accessed via APIs ● You don’t own it or care how it’s implemented ● Agreed SLAs ● Explicit choice, with tradeoffs, to not own the technology to run your business Service-full
- 13. ● New, smaller unit of compute ● Executed on demand, typically in response to events ● Used to glue together APIs, services ● Concurrency, scale, spin up/spin down, etc done by platform ● High utilization rates (wrt billing – pay for what you use) Functions (FaaS)
- 14. ● Agility ● Flexibility (opinionatedness) ● Cost/utilization ● Technology ownership ● Complexity Tradeoffs across these (at least spectrums):
- 15. When to use Serverless, Functions, Microservices, Monoliths? @christianposta ^^^ Save this for after
- 17. Knative is building blocks for a PaaS @christianposta
- 18. Knative operates on containers. Those containers can be anything. Can they be functions? Can you build FaaS on Knative? @christianposta
- 19. Let’s take a look at one of the “building blocks”… @christianposta
- 20. Let’s take a look at these building blocks @christianposta
- 21. Knative Serving: Allow our compute utilization to be driven by request load (think: autoscaler) and scale to zero when no load
- 22. Knative Eventing: Composing services and compute resources via events to build staged event driven architectures
- 23. Knative Build: Converting source packages into runnable containers
- 24. Knative Pipelines: Leverage Knative Build and Knative Events to abstract away CI/CD implementations on top of Kubernetes
- 25. Knative Caching: Simple API for providing caching to Knative components (TBD - still being sorted out).
- 26. Those most mature of the building blocks is Knative serving @christianposta
- 27. @christianposta
- 28. @christianposta
- 29. @christianposta
- 31. @christianposta
- 34. Thanks! BTW: Hand drawn diagrams made with Paper by FiftyThree.com Twitter: @christianposta Blog: http://blog.christianposta.com Email: [email protected] Slides: http://slideshare.net/cepostaFollow up links: • http://blog.christianposta.com • http://istio.io • http://envoyproxy.io • http://linkerd.io • http://consul.io • http://bit.ly/istio-tutorial • http://blog.christianposta.com/istio-workshop/slides/
Editor's Notes
- #4: How many people are embarking on projects to drive innovation in their organizations? How many people think those projects will succeed? How many people can predict the future? How many people believe their organization’s executives can predict the future?
- #11: …… new challenge….. Let’s come back to that…..