Open Source Challenges
Each adventure focuses on one open source technology, with challenges at different difficulty levels. Pick your adventure, work through real-world scenarios hands-on, and share what you learn with the community.
Filtered Challenges
2 challenges · Policy Reporter
The Twelve Tables
- 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
Governing the Provinces
- How to scope policies using ValidatingPolicy (cluster-wide) and NamespacedValidatingPolicy (per-namespace), and when to use each
- How CEL expressions in
ValidatingPolicyandPolicyExceptionexpress fine-grained admission conditions - How to write and scope a PolicyException correctly so only the intended workloads are exempt
Challenge Builders
Adventures don't build themselves. A heartfelt thank you to everyone who has put in the time and care to create them.
DevRel at Dynatrace and co-organizer of Cloud Native Linz. Passionate about building user-friendly Cloud Native and Kubernetes solutions, with a background in mobile and backend development. Found in tech and sports communities, inline skating rinks, and quiz nights across Europe.
adventures created
CNCF Ambassador and maintainer of OpenFeature and JUnit Pioneer. Helps teams release faster and with more confidence through open standards, feature flagging, and the communities that make both possible. A familiar face at KubeCon EU, Devoxx, ContainerDays, and meetups across Europe.
adventures created
Community Leaders
Top Challenge Solvers
- gsigmund8
- theharithsa7
- enri-kapaj6
- justinrand6
- alvin4
Challenge Grand Builders
- KatharinaSick11
Challenge Builders
- simon.schrottner3
Start Curious.Break Things.Learn Together.Glow Brighter.
You bring your questions, your fixes, your ideas. We bring the challenges, the tooling, and the practitioners who care about the same problems you do.
Every spark starts with one person. Like Nyx, our firefly, together we brighten the whole open source ecosystem.
That's OffOn. always On. always Open. always Learning.
