Serverless haskell
1 like423 views
The document discusses the development of 'serverless haskell' by Alexey Kotlyarov and David Overton, which aims to simplify serverless programming in Haskell to match the ease of Node.js and Python. It includes a serverless plugin and Haskell library that facilitate AWS Lambda functionalities, enabling the running of Haskell executables with inputs, outputs, and logging. Future plans involve enhancing functionality to support multiple invocations and expanding event types, with a call for more user engagement and contributions.
Serverless haskell
- 1. Serverless Haskell Alexey Kotlyarov & David Overton
- 2. Motivation ● AWS Lambda and the Serverless Framework make it easy to write small functions and deploy them to the cloud… ● … but not in Haskell ● Aim: to make it as easy to do serverless programming in Haskell as it is in NodeJS or Python ●
- 3. What we did ● Serverless Haskell ● Developed over a 3 day Hackathon at SEEK in December 2017 ● Consists of ○ A Serverless plugin ○ A Haskell library
- 4. Serverless plugin ● Provides a NodeJS wrapper that spawns your Haskell executable ● Hooks up pipes for input, output and logging ● At the moment it will spawn a new exe on each invocation ● Future plan: keep the exe running so that it can handle multiple invocations
- 5. Haskell library lambdaMain :: (Aeson.FromJSON event, Aeson.ToJSON res) => (event -> IO res) -- ^ Function to process the event -> IO ()
- 6. Event types Types for dealing with common Lambda events So far ● SNS ● S3 ● Kinesis ● APIGateway Plan to add more.
- 7. Alternative events ● Compose handlers for different types of events
- 8. Embedded events ● Some event types (e.g. SNS, APIGateway) have stringified JSON or Base64 embedded within string values in the JSON ● TextValue and Embedded
- 9. Examples
- 10. Conclusion ● We have several Lambdas at SEEK using this ● GitHub https://github.com/seek-oss/serverless-haskell ● Also on npm, hackage and stackage ● Future extensions: ○ Allow more than one Lambda invocation ○ Allow multiple functions per project ○ Expand the supported event types ● We would love to get more users ● Pull requests invited