Step-by-Step Guide to Deploying Istio on a Kubernetes Cluster

First, verify the health of the Kubernetes cluster: kubectl get nodes Typical output shows the master and worker nodes in a Ready state, for example:

master   Ready   control-plane,master   66d   v1.20.0

node1    Ready   <none>               66d   v1.20.0

node2    Ready   <none>               66d   v1.20.0

Next, create a dedicated namespace for the Bookinfo demo and enable automatic Istio sidecar injection:

kubectl create ns bookinfo

kubectl label namespace bookinfo istio-injection=enable

After the namespace is ready, navigate to the Istio installation directory and inspect the sample files:

cd /usr/local/istio/

ll

The samples/bookinfo directory contains the manifest files needed for deployment.

Enter the sample directory and list its contents:

cd samples/bookinfo/

ll

Key files include bookinfo.yaml, various service and deployment manifests, and a cleanup.sh script.

Deploy the Bookinfo application by applying the main manifest: kubectl apply -f bookinfo.yaml -n bookinfo The command creates services, service accounts, and deployments for details, ratings, reviews, and the product page, confirming each creation with messages such as:

service/details created

deployment.apps/details-v1 created

... (similar messages for other components) ...

After deployment, verify the pods in the bookinfo namespace: kubectl get pod -n bookinfo Then, create the Istio Ingress gateway for the application:

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

This creates the gateway and virtual service resources:

gateway.networking.istio.io/bookinfo-gateway created

virtualservice.networking.istio.io/bookinfo created

Finally, check the service endpoints to confirm that each microservice is reachable: kubectl get svc -n bookinfo Typical output lists the endpoints for details, productpage, ratings, and reviews with their cluster IPs and ports.

These steps complete the deployment of Istio on a Kubernetes cluster and expose the Bookinfo sample through an Ingress gateway.