Create Ingress Class

The first step is to create a Kubernetes IngressClass. The IngressClass defines how EKS Auto Mode handles Ingress resources. This step configures the load balancing capability of EKS Auto Mode. When you create Ingress resources for your applications, EKS Auto Mode uses this IngressClass to automatically provision and manage load balancers, integrating your Kubernetes applications with AWS load balancing services.

The ingressclass.yaml file can be found in the ./k8s/2048/ folder in the code repository. It declares a cluster-scoped resource that represents an Ingress controller type. The metadata section names the IngressClass as alb which allows it to be referenced by this name in other specifications. It also marks it as the default IngressClass for the cluster, so any Ingress resource without a spec.ingressClassName will be handled by this class. The spec section tells Kubernetes that the controller is eks.amazonaws.com/alb, which is the controller string used by the AWS Load Balancer Controller.

apiVersion: networking.k8s.io/v1
kind: IngressClass
metadata:
  name: alb
  annotations:
    ingressclass.kubernetes.io/is-default-class: "true"
spec:
  controller: eks.amazonaws.com/alb

In a terminal window, run the following command to apply this IngressClass to the cluster:

kubectl apply -f ingressclass.yaml