🟢 Restore proper admission control using Kyverno | June 2026 Adventure: Beginner

[KatharinaSick]

The Republic’s legal scholars have been busy - perhaps too busy. In their haste to codify the Twelve Tables, the foundation of the Republic’s legal system, they introduced errors that now threaten the city’s order. Workloads that should be blocked are running freely, and workloads that should be allowed are being turned away at the gates.

Play This Challenge to Learn

• How Kyverno ValidatingPolicy resources and CEL validation expressions work
• The difference between Audit, Deny, and Warn validation actions
• How to use custom label keys to enforce workload identity standards
• How Kyverno MutatingPolicy resources automatically patch incoming workloads at admission

Awards & Deadline

Complete all levels and post your solution in the community before the deadline to be eligible.

1st place: 50% voucher for a Linux Foundation certification
Top 3: Credly badge to showcase the achievement

Deadline: 23 June 2026 at 23:59 CET

Play Now

Start the Challenge

Share your solutions, your questions, and the moment it clicked in this thread. We’re looking forward to seeing how you restored order to the Republic.

[lanZe03]

Hi,

I gave it a try, but I’m running into an issue when opening my Codespace and using it directly in the browser. During the installation process, the setup gets stuck at:

Processing triggers for man-db (2.9.4-2) ...

I also tried running the scripts for exercise 05 in the .codespaces environment, but that results in several errors because some dependencies appear to be missing. In addition, kubectl never gets installed successfully. (assuming that happens because we get stuck at man-db)

I have also tried opening it in a new codespace, still resulted in the same issue.

Do you have any suggestions on how to resolve this?

Thanks!

[KatharinaSick]

Oh no, I’m sorry about that @lanZe03. which browser are you using? I just tried to reproduce your issue but everything works fine on my end.

man-db is pretty standard tooling and ships with the base image we’re using, so it might’ve been a Codespaces hiccup → may I ask you to give it another try? Please let me know if it happens again and I’ll dig deeper.

[maheedhar132]

Just finished the challenge

[theharithsa]

Good one, Maheedhar. Welcome to OffOn.

[theharithsa]

I completed this one for myself too. We are now saving the empire with our skills.

[iw4p]

enjoyed a lot