DMC Collaborative K8S Interview Tasks

The goal is to judge your familiarity with different technologies and see how you think about problems.

This is a very friendly audience. The goal is to work through the problems, helping everyone understand your thought process along the way. Googling, copy/paste, and asking questions is encouraged. More communication is better than less. Mostly, just have fun with it.

Version Control

Checkout the interview repo from GitHub https://github.com/datamachines/99-problems

Docker

The goal is to work through containerizing and running an application using Docker and Docker Compose

• Write a Dockerfile for a simple application contained in the src/hello-world folder of this repo. -- The service runs on port 5000 -- It should extend the official python:3 image
• Build the image from the dockerfile as hello:dev.

  Note that this may require using the host network as a build command parameter.

• Run the docker image and verify you can connect to it on port 5000 by curling http://localhost:5000/Boss.
• Stop and remove the container
• Retag and push the image to the local docker registry at localhost:32000/python:3
• Update a docker-compose file to run the image on the same port -- The service should expose port 5000 -- It should run the hello:dev image
• Verify you can once again connect to it on port 5000 by curling http://localhost:5000/Boss.
• Stop the app

Kubernetes

• List the nodes in the cluster
• Find out what storage is available in the cluster
• Create a new namespace hello
• Launch your hello-world app into the cluster using the kubernetes manifest in dist/k8s/hello-world-deployment.yml
• What port is the app available on?
• Verify the deployment is visible from the local host by curling http://localhost:<port>/Boss
• Exec into the deployment pod and find the current username
• View the logs of the pod
• Delete the deployment and service.