Istio is an opensource platform to connect, manage and secure microservices. This article will show you the way to deploy Istio and Bookinfo app on a K8s cluster steps-by-steps.
Illustration: Istio means “sail” in Greek. Source: Internet
Installing Istio
1. Download Istio
curl -L https://git.io/getLatestIstio | ISTIO_VERSION=1.1.0 sh -
2. Install all the Istio Custom Resource Definitions (CRDs)
cd istio-1.1.0
for i in install/kubernetes/helm/istio-init/files/crd*yaml; do kubectl apply -f $i; done
3. Install istio-demo
kubectl apply -f install/kubernetes/istio-demo.yaml
4. Uninstall Istio
kubectl delete -f install/kubernetes/istio-demo.yaml
for i in install/kubernetes/helm/istio-init/files/crd*yaml; do kubectl delete -f $i; done
Installing Bookinfo app
1. Label the namespace that will host the application with istio-injection=enabled
kubectl label namespace default istio-injection=enabled
2. Deploy Bookinfo application
kubectl apply -f samples/bookinfo/platform/kube/bookinfo.yaml
To confirm that the Bookinfo application is running.
kubectl exec -it $(kubectl get pod -l app=ratings -o jsonpath='{.items[0].metadata.name}') -c ratings -- curl productpage:9080/productpage | grep -o "<title>.*</title>"
<title>Simple Bookstore App</title>
3. Clean Bookinfo
samples/bookinfo/platform/kube/cleanup.sh
Determining the ingress IP and port
1. Define the ingress gateway for the application
kubectl apply -f samples/bookinfo/networking/bookinfo-gateway.yaml
2. Confirm the gateway has been created
kubectl get gateway
NAME AGE
bookinfo-gateway 32s
3. Set the INGRESS_HOST and INGRESS_PORT for accessing the gateway
Setting the ingress ports:
export INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="http2")].nodePort}')
export SECURE_INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="https")].nodePort}')
Setting the ingress IP:
export INGRESS_HOST=$(kubectl get po -l istio=ingressgateway -n istio-system -o jsonpath='{.items[0].status.hostIP}')
4. Set GATEWAY_URL
export GATEWAY_URL=$INGRESS_HOST:$INGRESS_PORT
5. Confirm the app is accessible from outside the cluster
Using web browser and goto http://${GATEWAY_URL}/productpage or:
curl -s http://${GATEWAY_URL}/productpage | grep -o "<title>.*</title>"
<title>Simple Bookstore App</title>
Author: truongnh1992 - Email: nguyenhaitruonghp[at]gmail[dot]com