k8s.github.io

Create a test service

Run the following on student-node

1. Ensure all calico pods are running. They can take a while to initialise

   watch kubectl get pods -n calico-system
   

   Press CTRL-C to exit watch when pods are stable

2. All 5 nodes should now be ready:

    kubectl get nodes
   

3. Deploy and expose an nginx pod

    kubectl create deployment nginx --image nginx:alpine
    kubectl expose deploy nginx --type=NodePort --port 80
   
    PORT_NUMBER=$(kubectl get service -l app=nginx -o jsonpath="{.items[0].spec.ports[0].nodePort}")
    echo -e "\n\nService exposed on NodePort $PORT_NUMBER"
   
   

1. Hit the new service

   curl http://node01:$PORT_NUMBER
   curl http://node02:$PORT_NUMBER
   

   Both should return the nginx welcome message as HTML text.

Congratulations! You now have a working HA kubeadm cluster.

Viewing service with a browser

1. Refer to the outputs of the terraform run and get the IP address for either node01 or node02. If you did not note these down, you can find the IP addresses from the EC2 console by looking in the Public IPv4 ... column (scroll right if this column is not in view).

2. Form a URL using the IP address (it will be different for you) and the NodePort number output from step 1 above, e.g.

    http://54.167.161.210:32182
   

3. Paste URL to your browser