learning-cloud-native-go / service-cluster

🌐 An implementation of an Istio gateway with k8s deployments and services.

Setting up an Istio Gateway

Development environment

Development dependencies

• https://kubernetes.io/docs/tasks/tools/install-minikube/
• https://github.com/helm/helm#install
• https://istio.io/docs/setup/#downloading-the-release

01. Starting minikube

• minikube start --memory=16384 --cpus=4
• minikube tunnel (💡separate terminal)

02. Setting up Istio

• curl -L https://git.io/getLatestIstio | ISTIO_VERSION=1.3.3 sh -

The steps according to istio.io/docs/setup/install/helm,

• kubectl create namespace istio-system
• helm template istio-1.3.3/install/kubernetes/helm/istio-init --name istio-init --namespace istio-system | kubectl apply -f -
• kubectl get crds | grep 'istio.io' | wc -l (should see 23)
• helm template istio-1.3.3/install/kubernetes/helm/istio --name istio --namespace istio-system | kubectl apply -f -

💡 Investigate the progress via kubectl get po -n istio-system.

Deployment process

Gateway

• kubectl apply -f gateway.yaml

💡 More info via kubectl get svc istio-ingressgateway -n istio-system.

Service A

• kubectl create ns servicea
• kubectl label ns servicea istio-injection=enabled
• kubectl apply -f servicea-deployment.yaml

  • 💡 Investigate the progress via kubectl get po -n servicea.

• kubectl apply -f servicea-service.yaml

  • 💡 Verify via kubectl get svc -n servicea.

• kubectl apply -f servicea-virtualservice.yaml

💡 istio-ingressgateway:LoadBalancer:EXTERNAL-IP/servicea/greet should give {"response": "Hello world!"}.

Service B

• kubectl create ns serviceb
• kubectl label ns serviceb istio-injection=enabled
• kubectl apply -f serviceb-deployment.yaml

  • 💡 Investigate the progress via kubectl get po -n serviceb.

• kubectl apply -f serviceb-service.yaml

  • 💡 Verify via kubectl get svc -n serviceb.

• kubectl apply -f serviceb-virtualservice.yaml

💡 istio-ingressgateway:LoadBalancer:EXTERNAL-IP/serviceb/greet should give {"response": "Hello world!"}.