Motivation

Add a representation of the Serverless Workflow implementation on OpenShift clusters. Users can create a YAML file representation of a workflow definition per the specification and apply it to OpenShift clusters.

Goals

An operator is responsible for handling this definition and deploying a Knative Service representation of the workflow runtime engine.

In this first version, users are supposed to:

1. Create Custom Resource representing a workflow definition
2. Have the controller build an image for the given service representation
3. Have the controller deploy a Knative Service

Not all Workflow features will be supported in this first version.

The features supported in the first versions are the following:

• Functions
• States
  • Supported State types:
    • Switch including dataConditions
    • Inject including data with a transition
    • Operation including Actions with functionRef with arguments
• KeepActive
• AutoRetries
• ExpressionsLang (jq or jsonpath)

Non-goals

• This first version won't be productized, release will be done on OperatorHUB only following an announcement in the community.