Skip to main content

LoadBalancer Service

As Deployment resources took care of deployments for us. Service resource will take care of serving the application to connections from outside of the cluster.

Requirements:​

  • You have an account on Cloudify.ro *Register
  • You have created a Cloudify.ro Kubernetes Cluster *Create Cluster
  • You have downloaded the corresponding kubeconfig file and kubectl is working *Authentication

Deploy an Application​

The deployment is an alpine-test image.

$ kubectl apply -f deployment.yml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hostname-echo-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: hostname-echo
  template:
    metadata:
      labels:
        app: hostname-echo
    spec:
      containers:
        - image: "lingxiankong/alpine-test"
          imagePullPolicy: Always
          name: hostname-echo-container
          ports:
            - containerPort: 8080
$ kubectl get deployments            
NAME                       READY   UP-TO-DATE   AVAILABLE   AGE
hostname-echo-deployment   1/1     1            1           41s

Deploy LoadBalancer Service​

$ kubectl apply -f service.yml
apiVersion: v1
kind: Service
metadata:
  name: hostname-echo-svc
spec:
  ports:
     -  port: 8080
        protocol: TCP
        targetPort: 8080
  selector:
    app: hostname-echo
  type: LoadBalancer

The output should show:

$ kubectl get services
NAME                TYPE           CLUSTER-IP       EXTERNAL-IP      PORT(S)          AGE
hostname-echo-svc   LoadBalancer   10.254.172.232   <floating-ip>        8080:31521/TCP   5m12s`

In your Cloudify.ro account will be added an Octavia LoadBalancer for Kubernetes LoadBalancer Service and a floating IP for external IP.

Test the connection:​

$ curl <floating-ip>:8080
hostname-echo-deployment-5b4b888787-mmlkg