Investigate if OneChart can be rendered to Cloud Run / KNative serving API

[laszlocph]

• Values files for OneChart carry all meaningful info that is needed for a containerized deployment to work
• OneChart is a Helm chart. helm template renders the chart into plain text.

The above two statements suggests that we can make a Helm chart that renders KNative serving API yamls. Not Kubernetes yamls, but yamls that KNative and Google Cloud Run understands.

The goal of this issue is to render a basic KNative manifest that is driven by a OneChart values file, like the following:

image:
  repository: nginx
  tag: latest
replicas: 3
containerPort: 5000
vars:
  DUMMY: "test-me"

and after a helm template command, the result can be deployed to Google Cloud Run.

Some info:

• https://ahmet.im/blog/cloud-run-is-a-knative/
• https://knative.dev/docs/reference/api/serving-api/

When we are done, we should review the project by KNative community members: salaboy and tvitale

[laszlocph]

Good First Issue

How is this a good first issue?

The task can be completed by Helm knowledge and basic understanding of KNative / Google Cloud RUn

[laszlocph]

It can be rendered and deployed. https://github.com/gimlet-io/onechart/issues/49 Deploy automation is another question.