Istio-Ingress-Security-JWT-Keycloak

This is sample repo to shows how to route requests based on JWT claims with authentication and authorizations on an Istio ingress gateway using Keycloak

POC:

Deploy Keycloak and configure service account client

Secure Istio Ingress gateway Keycloak's JWT

Prerequisite

Kubernetes Cluster (tested on v1.21.5-gke.1302)

Istio Instalation (tested on istio-1.12.0)

Kiali Dashboard

Deploy and configure Keycloak

Deploy Keycloak

  kubectl create -f https://raw.githubusercontent.com/keycloak/keycloak-quickstarts/latest/kubernetes-examples/keycloak.yaml


http://${KEYCLOAK_IP}:8080

Create service account client (backend-service) as shown in the below screenshot

Get public key (JWKS)

Assign the appropriate role

Note: My yaml(refer /yamls/quarkus-jwt-virtualservice.yaml) defines 'sash' as role required to access quarkus-demo workload.

Get Access Token

Note: Use this JWKS (public key) and access token when we doing the testing

Deploy existing(images are already in repo) workloads

Deploy Service account, workload, service

Note: These v1,v2,v3 images are already available in repo.

kubectl apply -f yamls/service-account.yaml
kubectl apply -f yamls/deploy-quarkus-demo-v1.yaml
kubectl apply -f yamls/deploy-quarkus-demo-v2.yaml
kubectl apply -f yamls/deploy-quarkus-demo-v3.yaml
kubectl apply -f yamls/quarkus-demo-svc.yaml

Istio Configuration without JWT

kubectl apply -f yamls/quarkus-gateway.yaml
kubectl apply -f yamls/quarkus-no-security-virtualservice.yaml

verify (without JWT):

http://${ISTIO_INGRESS_IP}/hello
http://${ISTIO_INGRESS_IP}/hello/greeting/Quarkus

Build & Deploy new version

Note new verion will automatically detected based on the app label and distribute the load to the new version

Update Properties value (/workload/src/main/resources/application.properties)

quarkus.container-image.name={name of the image} 
quarkus.container-image.tag={version tag}
quarkus.kubernetes.service-type=ClusterIP
quarkus.kubernetes.labels.app={label for app} 
quarkus.kubernetes.labels.version={label for version} 

#for Google registry(GCR)
quarkus.container-image.registry=gcr.io
quarkus.container-image.group={your google project id}

#for Docker hub (Dockerhub is the default registry)
#quarkus.container-image.group={your docker hub username}

Build new version of the code and push the image through Maven

cd workload

mvn clean package -Dquarkus.container-image.push=true

cd ..

Note : after successfull build, image should be found in the container registry

Deploy new version

Note: kubernetes.yml file be created by maven based on the application.properties config otherwise with default values

kubectl apply -f workload/target/kubernetes/kubernetes.yml

Istio Configuration with JWT

Note: If the claim doesn't have 'sash' role, it will reject

kubectl delete -f yamls/quarkus-no-security-virtualservice.yaml
kubectl apply -f yamls/quarkus-jwt.yaml
kubectl apply -f yamls/quarkus-jwt-virtualservice.yaml

Verify

Get access token

http://${KEYCLOAK_IP}:8080/auth/realms/master/protocol/openid-connect/token

Access Istio Ingress with JWT as Authorization Bearer request header

http://${ISTIO_INGRESS_IP}/hello
http://${ISTIO_INGRESS_IP}/hello/greeting/Quarkus

Cleanup

kubectl delete -f yamls/quarkus-jwt-virtualservice.yaml
kubectl delete -f yamls/quarkus-jwt.yaml
kubectl delete -f yamls/quarkus-gateway.yaml
kubectl delete -f yamls/quarkus-demo-svc.yaml
kubectl delete -f yamls/deploy-quarkus-demo-v3.yaml
kubectl delete -f yamls/deploy-quarkus-demo-v2.yaml
kubectl delete -f yamls/deploy-quarkus-demo-v1.yaml
kubectl delete -f yamls/service-account.yaml
kubectl delete -f https://raw.githubusercontent.com/keycloak/keycloak-quickstarts/latest/kubernetes-examples/keycloak.yaml

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