lab4.md

Lab CKAD Pod Design

Objective

The focus of this lab is to be able to debug and access a cluster by get a pods yaml or by inspecting it's "description" through describe. Additionally, you will rollout a deployment and roll it back.

1. Setup Lab 4 by running ./setup-lab4.sh. (without looking at sipt yet)

2. Question to answer about cluster:

   How many pods have the label app=front-end? How many pods in total? How many pods in foo namespace? How many pods with label app=front-end in entire cluster? Display all of them?

3. Create and run Deployment file which matches the nginx pods with the app=front-end label with replicas = 4.

4. Change the image to nginx:1.9.1 for the deployment

   hint: k set image deploy nginx nginx=nginx:1.9.1

5. Looking at deployment rollout history

6. Undo the last rollout

7. Create a Job that will run every 2 mins and print to STDOUT a random number. What is the value of the 1st random number?

   hint: shuf -i 0-999 -n1 will print a random number 0 - 999 hint: */2 * * * * is a cron for every 2 mins