Use an Ingress to enable external access to an application on a virtual node

Prerequisites

A virtual node is deployed in your ACK cluster. For more information, see Deploy ack-virtual-node in an ACK cluster.

The virtual-node-affinity-injection: enabled label is attached to the namespace where the application pods are deployed. For more information, see Create pods in a namespace with specified labels.

Procedure

1. Log on to the Container Service for Kubernetes (ACK) console.
2. In the left-side navigation pane, click Clusters.
3. On the Clusters page, find the cluster that you want to manage and click Details in the Actions column.
4. In the left-side navigation pane, click Workloads.
5. On the Workload page, click the Deployments tab. In the upper-right corner of the Deployments tab, click Create from Template.
6. Select the sample template or a custom template, and click Create.
   

   You can use the following YAML template to create an application and required resource objects for external access:

   apiVersion: extensions/v1beta1
   kind: Deployment
   metadata:
     name: coffee
   spec:
     replicas: 2
     selector:
       matchLabels:
         app: coffee
     template:
       metadata:
         labels:
           app: coffee
       spec:
         containers:
         - name: coffee
           image: nginxdemos/hello:plain-text
           ports:
           - containerPort: 80
   ---
   apiVersion: v1
   kind: Service
   metadata:
     name: coffee-svc
   spec:
     ports:
     - port: 80
       targetPort: 80
       protocol: TCP
     selector:
       app: coffee
     clusterIP: None
   ---
   apiVersion: extensions/v1beta1
   kind: Deployment
   metadata:
     name: tea
   spec:
     replicas: 3
     selector:
       matchLabels:
         app: tea
     template:
       metadata:
         labels:
           app: tea
       spec:
         containers:
         - name: tea
           image: nginxdemos/hello:plain-text
           ports:
           - containerPort: 80
   ---
   apiVersion: v1
   kind: Service
   metadata:
     name: tea-svc
     labels:
   spec:
     ports:
     - port: 80
       targetPort: 80
       protocol: TCP
     selector:
       app: tea
     clusterIP: None
   ---
   apiVersion: extensions/v1beta1
   kind: Ingress
   metadata:
     name: cafe-ingress
   spec:
     rules:
     - host: cafe.example.com
       http:
         paths:
         - path: /tea
           backend:
             serviceName: tea-svc
             servicePort: 80
         - path: /coffee
           backend:
             serviceName: coffee-svc
             servicePort: 80

Verify the results

• Go to the Workload page and click the Deployments tab. On the Deployments tab, you can find the newly created Deployments that are named coffee and tea.
• Go to the Workload page and click the Pods tab. On the Pods tab, you can find that all pods of the created Deployments run on the virtual-kubelet node.
• In the left-side navigation pane of the details page of the cluster, click Ingresses. On the Ingresses page, you can find the newly created Ingress.
• To check whether the created Ingress can be accessed, run the following commands:

  kubectl -n vk get ing

  curl -H "Host:cafe.example.com" <EXTERNAL_IP>/tea

  curl -H "Host:cafe.example.com" <EXTERNAL_IP>/coffee