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03-bookinfo_app.md

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INSTALL BOOKINFO SAMPLE APP

NOTE: Change directory to the root of the Istio installation ( /istio ).

The default Istio installation uses automatic sidecar injection on the namespaces having the label 'istio-injection=enabled'. So label the default namespace for Istio to automatically create a sidecar container inside the application pods in the default namespace.

Step1: enable istio injection on default namespace

kubectl label namespace default istio-injection=enabled

Step2: Deploy booking app

kubectl apply -f samples/bookinfo/platform/kube/bookinfo.yaml

The command above launches all four services shown in the bookinfo application architecture including all 3 versions of the reviews service, v1, v2, and v3.

Confirm all services and pods are correctly defined and running:

kubectl get pods

kubectl get svc

To confirm that the Bookinfo application is running, send a request to it by a curl command from some pod, for example from ratings:

Step3: Make sure app is working fine internally

kubectl exec -it $(kubectl get pod -l app=ratings -o jsonpath='{.items[0].metadata.name}') -c ratings -- curl productpage:9080/productpage | grep -o "<title>.*</title>"

Now that the Bookinfo services are up and running, you need to make the application accessible from outside of your Kubernetes cluster, e.g., from a browser. An Istio Gateway is used for this purpose.

Step4: Provision Ingress Gateway for external access

kubectl apply -f samples/bookinfo/networking/bookinfo-gateway.yaml

Confirm the gateway has been created:

kubectl get gateway

Step5: Run the following commands to obtain the GATEWAY URL/IP address

export INGRESS_HOST=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
export INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="http2")].port}')
export SECURE_INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="https")].port}')
export GATEWAY_URL=$INGRESS_HOST:$INGRESS_PORT

echo $GATEWAY_URL

Step6: To confirm that the Bookinfo application is accessible from outside the cluster, run the following curl command:

curl -s http://${GATEWAY_URL}/productpage | grep -o "<title>.*</title>"

You can also point your browser to http://$GATEWAY_URL/productpage to view the Bookinfo web page. If you refresh the page several times, you should see different versions of reviews shown in productpage, presented in a round robin style (red stars, black stars, no stars), since we haven't yet used Istio to control the version routing.

Step7: In web browser, go to http://${GATEWAY\_URL}/productpage