Severless with Knative, Docker, Kubernetes, Istio, .NET Core, ASP.NET Core, Java, Quarkus und GraalVM

1. @marklechtermann
Knative with .NET Core and Quarkus with GraalVM – Mark Lechtermann

2. @marklechtermann
Severless with Knative, Docker,
Kubernetes, Istio, .NET Core, ASP.NET
Core, Java, Quarkus und GraalVM

3. @marklechtermann
What?

4. @marklechtermann
Kubernetes
Kubernetes (K8s) is an open-source system for
automating deployment, scaling, and management of
containerized applications.
https://de.wikipedia.org/wiki/Kubernetes

5. @marklechtermann
K8s Objects
• Pod
• Service
• Volume
• Namespace
• ReplicaSet
• Deployment
• StatefulSet
• DaemonSet
• Job

6. @marklechtermann
K8s CRD – Extend Kubernetes
• Custom resources are extensions of the Kubernetes API
• The CustomResourceDefinition API resource allows you to define custom resources
• Defining a CRD object creates a new custom resource with a name and schema that
you specify

7. @marklechtermann
Containerized - It’s not only Docker

8. @marklechtermann
Docker
Docker is a set of platform as a service (PaaS) products
that use OS-level virtualization to deliver software in
packages called containers.
https://en.wikipedia.org/wiki/Docker_(software)

9. @marklechtermann
Kubernetes and Serverless

10. @marklechtermann
Serverless
Serverless computing is a cloud-computing execution
model in which the cloud provider runs the server, and
dynamically manages the allocation of machine
resources.
https://en.wikipedia.org/wiki/Serverless_computing

11. @marklechtermann
Serverless
• No servers to manage or provision
• Priced by consumption (not capacity) – pay per use
• Scales with usage
• Availability and fault tolerance
• Only code

12. @marklechtermann
Components

13. @marklechtermann
Istio
Istio is an open platform-independent service mesh
that provides traffic management, policy enforcement,
and telemetry collection.
https://istio.io/faq/general/

14. @marklechtermann
Knative

15. @marklechtermann
Knative Components
Building Serving Eventing

16. @marklechtermann
Knative Build
• Proposal: Knative Build deprecation in favor of Tekton Pipelines
• https://github.com/knative/build/issues/614
• Migration to Tekton
• https://meteatamel.wordpress.com/2019/08/28/migrating-from-knative-build-to-tekton-
pipelines/

17. @marklechtermann
Knative Serving and Eventing
Serving Eventing

18. @marklechtermann
Knative Serving
Serving Eventing

19. @marklechtermann
Knative Serving
Serving Eventing

20. @marklechtermann
Kantive Serving
• Rapid deployment of serverless containers
• Automatic scaling up and down to zero
• Routing and network programming for Istio components
• Point-in-time snapshots of deployed code and configurations
https://github.com/knative/serving

21. @marklechtermann
Kantive Serving
• Service
• … automatically manages the whole lifecycle of your workload.
• Route
• … maps a network endpoint to one or more revisions
• Configuration
• … maintains the desired state for your deployment
• Revision
• … is a point-in-time snapshot of the code and configuration
https://github.com/knative/serving

22. @marklechtermann
Knative Serving
Service
Configuration
Route RevisionRevision
Revision

23. @marklechtermann
… and now the application

24. @marklechtermann
The Twelve-Factor App
• https://12factor.net/
• Use declarative formats for setup automation, to minimize time and cost for new
developers joining the project;
• Have a clean contract with the underlying operating system, offering maximum
portability between execution environments;
• Are suitable for deployment on modern cloud platforms, obviating the need for
servers and systems administration;
• Minimize divergence between development and production, enabling continuous
deployment for maximum agility;
• And can scale up without significant changes to tooling, architecture, or development
practices.

25. @marklechtermann
more and more important is …
• Memory consumptions
• File size und container size
• Cold start

26. @marklechtermann
Supersonic Subatomic Java
Source: https://github.com/quarkusio/quarkus - https://www.apache.org/licenses/LICENSE-2.0

27. @marklechtermann
Quarkus
• a Kubernetes Native Java stack tailored for OpenJDK HotSpot and GraalVM
• fast boot time
• low memory usage
• unified configuration
• zero config
• live reload
• Container First!
https://quarkus.io/

28. @marklechtermann
STANDARDS
• on top of proven standards
• Eclipse MicroProfile
• JAX-RS annotations for REST
• JPA annotations for persistens
• JTA annotations for transactions
• Vert.x support
• Apache Camel support
https://quarkus.io/vision/standards

29. @marklechtermann
GraalVM
Run Programs Faster Anywhere
https://github.com/oracle/graal

30. @marklechtermann
GraalVM
• A universal virtual machine
• For JavaScript, Python, Ruby, R, JVM-based languages like Java, Scala, Clojure, Kotlin,
and LLVM-based languages such as C and C++
https://github.com/oracle/graal

31. @marklechtermann
GraalVM Native Image
• ahead-of-time compiler to compile Java code to a standalone executable
• includes the application, the libraries and the JDK
• does not run on the Java VM
• includes components like thread scheduling and memory management
https://github.com/oracle/graal

32. @marklechtermann
Memory and Boot
Source: Quarkus Community / CC b

33. @marklechtermann
https://commons.wikimedia.org/wiki/File:Logo-java-830x460.jpg - (CC BY-SA 4.0)

34. @marklechtermann
Create the App

35. @marklechtermann
The Code

36. @marklechtermann
Run the App

37. @marklechtermann
Building a native executable

38. @marklechtermann
Create the App

39. @marklechtermann
https://de.wikipedia.org/wiki/Datei:.NET_Core_Logo.svg

40. @marklechtermann
The Code

41. @marklechtermann
The Code

42. @marklechtermann
Run the App

43. @marklechtermann
Docker build - .net Core

44. @marklechtermann
Image Size

45. @marklechtermann
Knative

46. @marklechtermann
Service

47. @marklechtermann
Apply and Get

48. @marklechtermann
Configuration

49. @marklechtermann
Route

50. @marklechtermann
Route and DNS

51. @marklechtermann
Demo!

52. @marklechtermann
What is riff?
• riff is an Open Source platform for building and running Functions, Applications, and
Containers on Kubernetes.

53. @marklechtermann
said again…
• Memory consumption
• File size and Container size
• Cold start

54. GO DIGITAL. GET AHEAD.