openwhisk-wrapper: Haskell-based OpenWhisk services

Provides:

• A library which wraps functions as OpenWhisk services (based on dockerSkeleton).

• An example using split docker images:

  • Build phase: based on haskell:7.10.3 image
  • Deploy phase: uses haskell-scratch image

Usage:

1. Write the logic of your service, which should be a function with type Value -> IO (Maybe Value)

   myService :: Value -> IO (Maybe Value) -- consumes and produces JSON objects
   myService = pure . Right . id -- service logic, e.g. this echoes input data
   

2. Wrap your service with openwhiskWrapper function (see Network.OpenWhisk module)

   main :: IO ()
   main = openwhiskWrapper myService
   

3. Create docker image (see Dockerfile and make-image.sh script)

4. Upload the image to docker hub

5. Use wsk utility in order to instantiate an action with your image.

   wsk action update --docker action-name docker-hub-user/docker-hub-image