Setting up a LoadBalancer Service

LoadBalancer is a special Service type in Kubernetes that provisions a load balancer based on where your cluster is running. For instance, in AWS, Kubernetes will provision an Elastic Load Balancer.

Important note

For a full list of LoadBalancer services and configurations, check the documentation for Kubernetes Services at https://kubernetes.io/docs/concepts/services-networking/service/#loadbalancer.

Unlike with ClusterIP or NodePort, we can amend the functionality of a LoadBalancer Service in cloud-specific ways. Generally, this is done using an annotations block in the Service YAML file – which, as we've discussed before, is just a set of keys and values. To see how this is done for AWS, let's review the spec for a LoadBalancer Service:

loadbalancer-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: my-svc
  annotations:
    service.beta.kubernetes.io/aws-load-balancer...