k8s test

I used this project to setup a local kubernetes cluster with two pods. Each pod contains a container with a Node.js application:

• nodeserver which exposes a simple server listening on the 1337
• nodeclient which exposes an HTTP server on the 8081 with 2 endpoints:
  • / => you can use it to get the homepage (to test mounted volumes, see make mount)
  • /connect.html => you can use it to make a client connect to the server living in the other pod (nodeserver) via DNS service discovery

Steps to test this project

1. make mount
2. make create
3. Get the nodeclient HTTP server address by doing minikube service nodeclient --url
4. Call the nodeclient HTTP server homepage (see bullet 3 above, e.g. http://192.168.99.100:31144) to test your mounted volume
   • you can make some changes to the website/index.html file and reload the page to see if it works
5. Call the nodeclient /connect.html endpoint to test if the DNS service discovery works (e.g. http://192.168.99.100:31144/connect.html)

Use Makefile to create deployments and services and mounting volumes

make create
make local
make mount
make delete

Get the URL to access the nodeclient service

minikube service nodeclient --url

Access the logs

kubectl logs POD_NAME -c nodeclient

To get the POD_NAME do kubectl get pod.

Getting inside the container

kubectl exec -it POD_NAME -c nodeclient -- /bin/bash

To get the POD_NAME do kubectl get pod.

Alternatively here are some commands to handle deployment/svc one by one

• Delete any previous nodeclient deployment and service
  • kubectl delete deployment,svc nodeclient
• Create the nodeclient deployment and specify which port you want to expose
  • Add --dry-run -o yaml > deployment.yaml to create conf file
  • kubectl run nodeclient --image=nodeclient:dev-latest --port=8081
• Expose the previously created deployment
  • Add --dry-run -o yaml > svc.yaml to create conf file
  • kubectl expose deployment nodeclient --type=NodePort