unfor19 / knative-example

knative-example

Requirements

• Docker
• https://knative.dev/docs/getting-started/
• minikube version v1.31.1+ to support Kubernetes version 1.27
• Knative CLI

  brew install knative/client/kn

• Install Knative Quickstart

  brew install knative-sandbox/kn-plugins/quickstart

• Install Knative Functions plugin - https://github.com/knative/func/releases

Getting Started

1. Start Kubernetes cluster locally with minikube

   kn quickstart minikube --kubernetes-version 1.27

2. Start a separated terminal for a tunnel

   minikube tunnel --profile knative

3. Create function

   kn-func create -l node knative-example

4. Install dependencies locally

   npm install

5. Run the function

   cd knative-example && kn-func run --registry docker.io/unfor19

6. Test the function

   cd knative-example && npm test

7. Rebuild the function Docker image

   cd knative-example && kn-func build --registry docker.io/unfor19

8. Push the function to the Kubernetes cluster

   cd knative-example && kn-func deploy --build --registry docker.io/unfor19

9. Create the function as a service for the first time

   kn service create knative-example \
    --image docker.io/unfor19/knative-example:latest \
    --port 8080 \
    --env TARGET=initial-value

10. Test the deployed service http://knative-example.default.127.0.0.1.sslip.io?hello=world

    cd knative-example && npm test
    

    curl -L http://knative-example.default.127.0.0.1.sslip.io?hello=world
    

11. Update the service

    kn service update knative-example \
     --image docker.io/unfor19/knative-example:latest \
     --port 8080 \
     --env TARGET=updated