OpenFaaS serverless framework for Docker and Kubernetes - London
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The document discusses OpenFaaS, an open source serverless framework that allows users to build and deploy functions using Docker containers. It can run functions on Kubernetes as well as Docker Swarm. OpenFaaS aims to provide a simple way to develop and deploy serverless applications using containers. The document outlines how OpenFaaS works, how to write functions using different languages, and how to deploy and manage functions on Kubernetes or Docker Swarm. It also discusses asynchronous processing using queues and provides examples of serverless applications that have been built with OpenFaaS.
OpenFaaS serverless framework for Docker and Kubernetes - London
- 1. OpenFaaS framework Serverless functions for Docker & Kubernetes CLOUD NATIVE LONDON - 5TH SEP @alexellisuk / openfaas.com
- 3. “Alexa, how’s the weather?” { “intent”: “FindWeather” } { “speech”: “It’s 70 degrees” } Lambda Function
- 4. “Alexa, how’s the weather?” { “intent”: “FindWeather” } { “speech”: “It’s 70 degrees” } +
- 5. OpenFaaS DRIVING FACTORS PortabilityEase of use Simplicity Open Platform
- 6. How did OpenFaaS come about? STORY SO FAR • “Lambda but on containers for Alexa” • Dockercon Cool Hacks - “push Docker beyond what it was designed to do” • Major changes since Dockercon • Top trending Open Source project overall • > 5k stars • Kubernetes & external provider support • Asynchronous processing via NATS • CLI & templating • Regular contributors & Slack Community
- 7. OpenFaaS top contributors and influencers
- 8. What are serverless use-cases? ANYTHING Image/Video conversion Machine Learning Mobile Back- ends / IoT HTTP services Chat Bots Batch Jobs
- 9. What is OpenFaaS? "A SERVERLESS FRAMEWORK BUILT ON CONTAINERS" • Basic primitive: containers in OCI format • Container security • r/o filesystem, privilege drop, content trust • Manage functions with scheduler/orchestrator • Rich container eco-system - commercial & community • Anything can be a function - polyglot • Leverage existing skills in teams (including Windows) • Avoid vendor lock-in • Run anywhere - cloud or on-prem
- 12. Comes in one flavor: Cloud Native API Gateway Function Watchdog Prometheus Swarm Kubernetes
- 14. Performance - fork vs After Burn HELLO-WORLD & APACHE-BENCH
- 15. How do I write a function? WRITE A HANDLER def handler(req): r = requests.get(req) print(r.status_code) handler.py requirements.txt Python Template Docker Image requests $ faas-cli new --lang python --name sample Container Registry
- 16. What languages are available? SHORT ANSWER - ANY • Use supported templates • Edit them or bring your own • Or go “full Docker”
- 17. How do I arrange functions? provider: name: faas gateway: http://localhost:31112 shrink-image: image: functions/resizer:latest fprocess: "convert - -resize 50% fd:1” environment: MAGICK_FONT_PATH: /fonts url-ping: lang: python handler: ./sample/url-ping image: alexellis/url-ping $ faas-cli build -f ./sample.yml $ faas-cli deploy -f ./sample.yml YAML STACK
- 18. Deployed in 60 seconds QUICK DEMO
- 20. Kubernetes support VIA EXTERNAL PROVIDER kubernetes • Rich eco-system • Large user-base with existing on-prem/ hybrid deployments • Similar primitives to Docker Swarm
- 21. Kubernetes support VIA EXTERNAL PROVIDER Gateway faas-netes UI CLI Web Func 1 Func 1 Func 2 kubernetes
- 22. Synchronous invocation IN STORE RETURNS marshal request Gateway Func: resizer HTTP 200 Resize Image
- 23. Asynchronous invocation RETURN A PRODUCT BY MAIL NATS Queue marshal request Gateway Queue-worker dequeue Func: resizer HTTP 200 HTTP 200 Resize Image
- 24. Asynchronous concerns ADDED COMPLEXITY • Points of failure: • Func*on • Queue-worker • Queue server • Func*on response • Store in S3 or aDB • Poll for result • Callback to URL?
- 25. Asynchronous invocation WITH A CALLBACK-URL Gateway Func: resizer HTTP 200 http://x.y.z X-Callback-Url: hTp://x.y.z X-Callback-Url Resize Image Queue etc
- 26. openfaas.com
- 28. What’s next for OpenFaaS? SET REPLICAS = 10,000 • Roadmap - supporting users • Evaluating - ADP, Huawei, CodeFresh, Microsoft, IRT Saint Exupery • Building - Huawei, Hyper.sh, Kong • Additional language templates & AfterBurn • Guides, manual & tutorials for developer-clouds • Get SWAG and get involved • Contributors, sponsorship and finding a home • Speaking • LinuxCon, L.A. - Sept • JeffConf, Milan - Sept • Dockercon EU, Copenhagen - October
- 30. Fun examples FUNCTIONS / DEMOS • Dockercon closing keynote (video) Derek • https://github.com/alexellis/derek Twitter + Elastic search / Youtube Downloader • https://github.com/alexellis/journey-expert Other functions • https://github.com/alexellis/faas-contributor-stamp • https://github.com/alexellis/faas-office-sample • https://github.com/alexellis/faas-img2ansi
- 31. External providers Gateway Watchdog Gateway faas-netes Watchdog Gateway Create Swarm Service Gateway faas-netes Create deployment & service Invoke Deploy fprocess fprocess