This is a demonstration of how to use Kubernetes Ingress to route traffic to different services in your cluster based on different paths.

To get started, you will need to install the nginx-ingress controller in your Kubernetes cluster by running the following command:

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/kind/deploy.yaml

This will deploy the nginx-ingress controller as a Deployment in your cluster.

Next, you will need to create some sample Deployments to route traffic to. Run the following commands to create the Deployments:

kubectl create deploy sample-1 --image=devopsprosamples/next-path-sample-1
kubectl create deploy sample-2 --image=devopsprosamples/next-path-sample-2
kubectl create deploy sample-3 --image=devopsprosamples/next-sample-1
kubectl create deploy sample-4 --image=devopsprosamples/next-sample-2

These commands will create four sample Deployments with different images.

After you have created the Deployments, you will need to create Services for each of them. Run the following commands to create the Services:

kubectl expose deploy sample-1 --type=ClusterIP --port=3000
kubectl expose deploy sample-2 --type=ClusterIP --port=3000
kubectl expose deploy sample-3 --type=ClusterIP --port=3000
kubectl expose deploy sample-4 --type=ClusterIP --port=3000

These commands will create four Services with ClusterIP type for each of the sample Deployments.

Now that you have created the Services, you can create an Ingress resource to route traffic to them based on different paths. To create the Ingress resource, run the following command:

kubectl apply -f ingress-resource.yaml

This will create an Ingress resource with rules to route traffic to the sample Services based on different paths.

If you want to use HTTPS with your Ingress, you will need to install a certificate manager. Run the following command to install the Jetstack cert-manager:

kubectl apply -f https://github.com/jetstack/cert-manager/releases/download/v1.7.1/cert-manager.yaml

This will install the cert-manager as a Deployment in your cluster.

After you have installed the cert-manager, you can create a Clusterissuer to issue SSL certificates for your Ingress. Run the following commands to create the staging and production Clusterissuers:

kubectl apply -f staging_issuer.yaml
kubectl apply -f prod_issuer.yaml

These commands will create two Clusterissuers, one for staging and one for production.

Here are some other useful commands to help you manage your Kubernetes cluster:

kubectl get deploy

kubectl get svc

kubectl get ing

kubectl describe ing <ing-name>

kubectl get clusterissuer

kubectl get certificate

kubectl describe certificate