Build your first app on Knative Serverless

In this live webcast, you'll learn about Knative, a new open source collaboration from IBM, Google, Pivotal, Red Hat, Cisco, and others. Knative is a Serverless platform that offers a set of reusable components that focuses on solving many mundane but difficult tasks such as orchestrating source-to-container workflows, routing and managing traffic during deployment, auto-scaling your workloads, or binding running services to eventing ecosystems.

Webinar Video here: https://developer.ibm.com/videos/build-your-first-app-on-knative-serverless-tech-talk/

Install Knative

Depending which Kubernetes deployment you have follow the instructions here https://www.knative.dev/docs/install/

I recommend using the IKS (IBM Kubernetes Service) Knative Add-on https://www.ibm.com/blogs/bluemix/2019/03/knative-on-ibm-cloud-kubernetes-service-your-first-app-now-even-easier/

Deploy Go App

Build the container image

pushd go
docker build . -t {username}/helloworld-go
docker push {username}/helloworld-go
popd

Deploy the Knative service, but first edit the docker image location replacing it with your {username} from previous step.

kubectl apply -f service-go.yaml

Verify the deployment

kubectl get ksvc

Run the App, first get the URL of the App

kubectl get routes

Open the App in a Browser or use Curl usign URL from previous step

Deploy Node.js App

Build the container image

pushd nodejs
docker build . -t {username}/webappnodejs-express-run
docker push {username}/webappnodejs-express-run
popd

Deploy the Knative service, but first edit the docker image location replacing it with your {username} from previous step.

kubectl apply -f service-nodejs.yaml

Verify the deployment

kubectl get ksvc

Run the App, first get the URL of the App

kubectl get routes

Open the App in a Browser or use curl usign URL from previous step

Deploy Java App

Build the container image

pushd java
docker build . -t {username}/quarkus
docker push {username}/quarkus
popd

Deploy the Knative service, but first edit the docker image location replacing it with your {username} from previous step.

kubectl apply -f service-java.yaml

Verify the deployment

kubectl get ksvc

Run the App, first get the URL of the App

kubectl get routes

Open the App in a Browser or use curl usign URL from previous step

Deploy Blue Green

Deploy the Knative deployment yaml that contains the two configuration and the route with the traffic splitting information.

kubectl apply -f serving-routing.yaml

Verify the deployment

kubectl get configurations

Run the App, first get the URL of the App

kubectl get routes

Open the App in a Browser or use curl usign URL from previous step

To access a specific version of the app regardless of the traffic split append the name v1 or v2 in front of the URL like v2.{ROUTE_URL}