Challenge, Easy,  on  Kubernetes

Perform In-Place Updates on a Kubernetes Deployment

Scenario

You are working with a Kubernetes Deployment running in the prod namespace.

An existing Deployment named nginx-deployment is already running with two containers:

ContainerImage
nginxpublic.ecr.aws/nginx/nginx:stable-alpine
sidecarbusybox:latest

Tasks

  1. Update the nginx container image to:
    • public.ecr.aws/nginx/nginx:alpine
  2. Update the sidecar container image to:
    • busybox:musl
  3. Rename the containers:
    • nginx → nginx-prod
    • sidecar → sidecar-prod
  4. Update the Deployment to use the Recreate update strategy.
  5. Scale the Deployment to 3 replicas.

Ensure the Deployment reaches a healthy state after applying the changes.

🧪 Test Cases

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Install labctl CLI

curl -sf https://labs.iximiuz.com/cli/install.sh | sh

This will download and install the latest version of the labctl CLI. You only need to do this once per workstation.

Authorize labctl

labctl auth login

This will open a browser window asking you to authorize labctl to access your account. You need to do it after a fresh install of labctl and repeat it whenever the auth session expires.

Pull challenge content

labctl content pull challenge Perform-In-Place-Updates-on-a-Kubernetes-Deployment-c866d58a

This will create a local copy of the challenge content in a directory named Perform-In-Place-Updates-on-a-Kubernetes-Deployment-c866d58a. You only need to do this once per challenge.

Stream your changes

labctl content push -fw challenge Perform-In-Place-Updates-on-a-Kubernetes-Deployment-c866d58a

Run this command in a separate terminal to continuously upload your changes to the server while editing the challenge in your favorite text editor or IDE.

You can also use labctl to create, list, and delete your content. Learn more about the available commands: labctl content --help

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