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Knative-deploy

Step-by-step instructions to install Knative with Istio 1.0.2 on IBM Cloud Kubernetes Service(IKS), build and push your image to IBM Cloud Container Registry and deploy the app.

For up-to-date instructions, refer to this article on Medium

Prerequisites

Setup IBMCloud CLI

  • Install the cs (container-service) and cr (container-registry) plugins
  ibmcloud plugin install container-service -r Bluemix
  ibmcloud plugin install container-registry -r Bluemix
  • Authorize ibmcloud:
  ibmcloud login

  kubectl apply --filename https://raw.githubusercontent.com/knative/serving/master/third_party/istio-1.0.2/istio.yaml

  • Label the default namespace with istio-injection=enabled: kubectl label namespace default istio-injection=enabled

  • Monitor the Istio components until all of the components show a STATUS of Running or Completed: kubectl get pods --namespace istio-system

  • Installing Knative components

Build your source into a container image and push using Kaniko

To Build a source into a container image from a Dockerfile inside a kubernetes cluster and push the image to IBM Cloud Container registry; all of this using Google's Kaniko tool, refer this link

OR

to build a container Image using Docker Daemon, follow the steps below

Build the app as a container image using Docker Daemon

Rehash of helloworld-nodejs

  • Clone the repo
  git clone https://github.com/VidyasagarMSC/knative-deploy.git
  cd knative-deploy
  • Install dependencies
  npm install
  • Build and Push the Docker image to IBM Cloud Container Registry by replacing <region> and <namespace> values
  ibmcloud cr build -t registry.<region>.bluemix.net/<namespace>/knative-node-app .
  • Open service.yaml, replace image and run the below command
  kubectl apply --filename service.yaml

Test your app

  • To find the IP address for your service, use kubectl get svc knative-ingressgateway -n istio-system to get the ingress IP for your cluster. If your cluster is new, it may take sometime for the service to get asssigned an external IP address.
export IP_ADDRESS=$(kubectl get svc knative-ingressgateway --namespace istio-system --output 'jsonpath={.status.loadBalancer.ingress[0].ip}')
  • To find the URL for your service, use kubectl get services.serving.knative.dev knative-node-app --output jsonpath='{.status.domain}'
export HOST_URL=$(kubectl get services.serving.knative.dev knative-node-app  --output jsonpath='{.status.domain}')
  • Now you can make a request to your app to see the result.
 curl -H "Host: ${HOST_URL}" http://${IP_ADDRESS}
Node App running on IBM Cloud

Cleanup

  • Run the below command to remove the sample app from your cluster
 kubectl delete --filename service.yaml
  • To delete the cluster, enter the following command:
 ibmcloud cs cluster-rm $CLUSTER_NAME

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