Challenge, Medium,  on  Kubernetes

Inspecting and Extracting Kubernetes Kubeconfig Data

Scenario

You are working on the host dev-machine and are provided with a kubeconfig file located at /opt/labs/2/admin-kubeconfig.

The kubeconfig contains multiple contexts and users, all of which authenticate using a client certificate.

Perform the task on the dev-machine using the root user.

Tasks

  1. Write all kubeconfig context names into /opt/labs/2/context-list, one per line.
  2. Write the name of the current context into /opt/labs/2/active-context.
  3. Extract the base64-encoded client certificate of user user-account-1042, decode it, and write the decoded certificate to /opt/labs/2/client-cert.

Test Cases

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How to Author Challenges on iximiuz Labs

Instead of providing a subpar online editing experience, iximiuz Labs offers a helper CLI tool called labctl, allowing you to use your favorite text editor (or a full-featured IDE) to write content from the comfort of your local machine.

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 inspecting-and-extracting-kubernetes-kubeconfig-data-50e5b3b3

This will create a local copy of the challenge content in a directory named inspecting-and-extracting-kubernetes-kubeconfig-data-50e5b3b3. You only need to do this once per challenge.

Stream your changes

labctl content push -fw challenge inspecting-and-extracting-kubernetes-kubeconfig-data-50e5b3b3

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

Start challenge