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27.03.2017
Serverless Computing / FaaS
About me
Co-Founder and CTOVoice and chat user interfaces in combination with AI to boost productivity at the workplace.
botconnect.io
Senior Analyst in ResidenceObserving the technology industry and its impact on business and society to deliver insight and foresight.
crisp-research.com
What is FaaS?
Trigger Function Integration
… in the cloud*
* for discussion of serverless computing on premise see Hausenblas: Serverless Ops
FaaS vs PaaS
• unit of computation is a function
• job oriented
• no provisioning
• transparent autoscaling
• low latency*
* 10 - 100 ms for Javascript and Python, >10s for JVM under certain conditions
FaaS providers
• Amazon AWS Lambda
• Microsoft Azure Functions
• Google Cloud Functions
• IBM Bluemix OpenWhisk
• Iron Functions*
• Galactic Fog Gestalt Framework*
* Open Source
Differences in offerings
• triggers
• programming languages
• pricing
• cloud / on-premise
How to use
example: AWS Lambda
• create lambda function
• choose template
• choose trigger
• configure function
• implement function
Use Case Alexa
• templates: alexa skills templates
• trigger: alexa skills kit
• function: handling intents
Use Case AWS IoT
• templates: IoT templates
• trigger: AWS IoT
• function: handling MQTT message
Use Case API Gateway
• templates: api gateway / microservice templates
• trigger: API gateway
• function: handling http requests
Other services
User
HTTP requests
Integration requests
API Gateway
Lambda
serverless.com
• serverless CLI
• credentials (e. g. .aws/credentials)
• serverless.yml (service)
• handler.js (function)
serverless.com / workflow
serverless create
serverless deploy
serverless remove
Source: serverless.com
Serverless.com / functions
Source: serverless.com
Serverless.com / events
Source: serverless.com
Serverless.com / very simple example
serverless.yml
handler.js
aws api gateway
Conclusions
• „serverless" is a confusing name
• FaaS is still in an early stage
• not the right approach for every problem
• pros: development / deployment / operations / scaling / lean & fast
• cons: debugging / monitoring
Resources
• https://martinfowler.com/articles/serverless.html
• http://www.oreilly.com/webops-perf/free/serverless-ops.csp
