Cloud Native Programming with Golang

Services

Currently, we have four NGINX containers running, but no way to actually access them. This is where Services come into play. Create a new YAML file named nginx-service.yaml:

apiVersion: v1 
kind: Service 
metadata: 
  name: nginx 
spec: 
  type: NodePort 
  selector: 
    app: nginx 
  ports: 
  - name: http 
    port: 80 

Note that the spec.selector property matches the metadata.labels property that you have specified in the Deployment manifest. All Pods created by a Deployment controller will have a given set of labels (which are really just arbitrary key/value mappings). The spec.selector property of a Service now specifies which labels a Pod should have to be recognized by this Service. Also, note the type: NodePort property, which is going to be important ...