riffing on Knative - Scott Andrews
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This document provides an overview of a demo presentation on riffing on Knative. It introduces Knative and its components for building, deploying and managing serverless workloads. It demonstrates how riff builds on Knative to provide an opinionated experience for building functions using various programming languages and invoking them through command line or event driven methods. The document includes examples of deploying and chaining Java, JavaScript and command line functions on Knative and Kubernetes.
![Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license:
http://creativecommons.org/licenses/by-nc/3.0/
a riff Command Function
21
# https://github.com/projectriff-samples/fats-uppercase-command
#!/bin/sh
tr '[a-z]' '[A-Z]'](https://image.slidesharecdn.com/s1tourriffingonknative-190220130219/85/riffing-on-Knative-Scott-Andrews-21-320.jpg)
riffing on Knative - Scott Andrews
- 1. riffing on Knative Scott Andrews @scothis
- 2. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Safe Harbor Statement The following is intended to outline the general direction of Pivotal's offerings. It is intended for information purposes only and may not be incorporated into any contract. Any information regarding pre-release of Pivotal offerings, future updates or other planned modifications is subject to ongoing evaluation by Pivotal and is subject to change. This information is provided without warranty or any kind, express or implied, and is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions regarding Pivotal's offerings. These purchasing decisions should only be based on features currently available. The development, release, and timing of any features or functionality described for Pivotal's offerings in this presentation remain at the sole discretion of Pivotal. Pivotal has no obligation to update forward looking information in this presentation. 2
- 3. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Disclaimer everything is alpha Have fun(ctions), but not in production
- 4. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Demo driven talk • Kubernetes primer • Serverless Kubernetes with Knative • Building and deploying a riff Function from source • Java • Node.js • commands • Invoking a riff Function • command driven functions • event driven functions Overview 4
- 5. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Tools we’ll use • riff - riff is for functions https://github.com/projectriff/riff/releases • kubectl - Kubernetes CLI https://kubernetes.io/docs/tasks/tools/install-kubectl/ • kail - kubernetes tail https://github.com/boz/kail • watch - execute a program periodically, showing output fullscreen https://gitlab.com/procps-ng/procps 5 
- 6. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Demo: Using k8s
- 7. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ What is riff
- 8. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Knative Kubernetes-based platform to build, deploy, and manage modern serverless workloads Three core components: • Build - Source-to-container build orchestration • Serving - Request-driven compute that can scale to zero • Eventing - Management and delivery of events 100% open source. Created by Google with contributions from Pivotal and others 8 
- 9. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 9 BuildTemplate Source Channel Build Knative Custom Resource Definitions Subscription refers to refers to creates and registers instance of Eventing Serving Build
- 10. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ riff is for functions • event driven Function as a Service • opinionated experience built atop Knative, Kubernetes and Istio • functions practice Inversion of Control • no servers, ports or messaging protocols, just your logic • pick your language runtime: • Java/Spring • JavaScript/Node • executable commands • more from the community 1 0 
- 11. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ riff on Knative Community-driven ecosystem of Sources, Channels, Functions, Invokers, BuildTemplates, etc. Kubernetes BuildTemplates Channels CLI Invokers CLI Invokers Build Topics
- 12. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Installing riff (and Knative)
- 13. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Creating a Kubernetes cluster 13 # https://projectriff.io/docs/getting-started/gke/ # create cluster gcloud container clusters create $CLUSTER_NAME --cluster-version=latest --machine-type=n1-standard-4 --enable-autoscaling --min-nodes=1 --max-nodes=3 --num-nodes=3 --enable-autorepair --scopes=service-control,service-management,compute-rw,storage-ro,cloud-platform,logging- write,monitoring-write,pubsub,datastore # grant yourself cluster-admin kubectl create clusterrolebinding cluster-admin-binding --clusterrole=cluster-admin --user=$(gcloud config get-value core/account)
- 14. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Install riff 14 # https://projectriff.io/docs/getting-started/gke/ # once per cluster riff system install # once per namespace riff namespace init $NAMESPACE --gcr $PATH_TO_GCR_CREDENTIALS
- 15. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Install riff ...and dependencies including: • Istio • Knative Build • Knative Serving • Knative Eventing • In Memory Channel Provisioner • Kafka, Cloud Pub/Sub, NATSS are also available, but not installed • riff BuildTemplate - convert source to riff Function container images • credentials to push builds to an image registry 1 5 
- 16. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Demo: Exploring Knative
- 17. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 17 BuildTemplate Source Channel Build Knative Custom Resource Definitions Subscription refers to refers to creates and registers instance of Eventing Serving Build
- 18. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ riff Functions
- 19. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ a riff Java Function 19 // https://github.com/projectriff-samples/fats-uppercase-java package functions; import java.util.function.Function; public class Upper implements Function<String, String> { public String apply(String s) { return s.toUpperCase(); } }
- 20. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ a riff JavaScript Function 2 0 // https://github.com/projectriff-samples/fats-uppercase-node module.exports = s => s.toUpperCase();
- 21. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ a riff Command Function 21 # https://github.com/projectriff-samples/fats-uppercase-command #!/bin/sh tr '[a-z]' '[A-Z]'
- 22. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Demo: riff Functions
- 23. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Deploy a riff Function 2 3 riff function create square --git-repo https://github.com/projectriff-samples/node-square --artifact square.js --verbose kail -l riff.projectriff.io/function=square -c user-container
- 24. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Invoke a riff Function 2 4 riff service invoke square --json -- -w 'n' -d 7
- 25. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Let’s create another function 2 5 riff function create greet --git-repo https://github.com/projectriff-samples/command-hello --artifact greet.sh riff service invoke greet --text -- -w 'n' -d "Washington"
- 26. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Demo: Local Functions
- 27. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Iterating quickly (in development) 2 7 riff function local run --local-path ./uppercase curl localhost:8080 -H 'Content-Type: text/plain' -w 'n' -d 'shhh!'
- 28. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Run on cluster from local source 2 8 riff function create uppercase --local-path ./uppercase --verbose riff service invoke uppercase --text -- -w 'n' -d 'shhh!'
- 29. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Demo: Event Driven Functions
- 30. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Invoke a riff Function with events 3 0 riff channel create numbers riff channel create squares riff subscription create --channel numbers --subscriber square --reply squares riff service create correlator --image scothis/correlator:s1tour
- 31. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Invoke a riff Function with events 31 correlator numbers squaressquare riff invoke /numbers
- 32. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Demo: Function Chaining
- 33. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Invoke a riff Function with events 3 3 riff service invoke correlator /s1tour/numbers --json -- -w 'n' -v -d 7
- 34. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Invoke the riff Function with events 3 4 correlator numbers replies squaressquaregreet riff invoke /numbers
- 35. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Let’s chain our functions 3 5 riff channel create replies riff subscription create --channel squares --subscriber greet --reply replies riff subscription create --channel replies --subscriber correlator
- 36. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Invoke a riff Function with events 3 6 riff service invoke correlator /s1tour/numbers --json -- -H "Knative-Blocking-Request: true" -w 'n' -d 7
- 37. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Invoke the riff Function with events 3 7
- 38. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Invoke the riff Function with events 3 8
- 39. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Invoke the riff Function with events 3 9
- 40. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Invoke the riff Function with events 4 0
- 41. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Invoke the riff Function with events 41
- 42. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Invoke the riff Function with events 4 2
- 43. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Other patterns are possible 4 3 correlator numbers replies squaressquaregreet riff invoke /numbers dead-beef-00 GET /dead-beef-00
- 44. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ There's more we didn't have time to show... 4 4 • alternate Eventing Channels • Kafka • NATSS • Google Cloud PubSub • Eventing Sources • Cloud Events • alternate BuildTemplates • Buildah • jib • kaniko • deploying Knative from source • Istio • public DNS • Autoscaler tuning • monitoring • Grafana • Prometheus • Zipkin You can learn more at https://www.knative.dev
- 45. Unless otherwise indicated, these slides are © 2013-2018 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Free eBook http://bit.ly/getting-started-with-knative Hot off the press
- 46. > join us at projectriff.io @projectriff