Kubernetes Cookbook - Second Edition

Service (LoadBalancer)

A LoadBalancer service type only works in the cloud environment that supports external load balancers. This allows outside traffic to be routed into target Pods. In GCP, a TCP load balancer will be created by a LoadBalancer service type:

1. The firewall rules for allowing traffic between the load balancer and nodes will be created automatically:

// leveraging LoadBalancer service# cat gke-service.yamlapiVersion: apps/v1kind: Deploymentmetadata:  name: nginxspec:  replicas: 1  selector:    matchLabels:      run: nginx  template:    metadata:      labels:        run: nginx    spec:      containers:        - image: nginx          name: nginx          ports:            - containerPort: 80---apiVersion: v1kind: Servicemetadata:  name: nginxspec:  ports:    - port: 80      targetPort: 80 type: LoadBalancer ...