What is the purpose of Kubernetes finalizers and how can they prevent resource deletion?

Question

Kubernetes Fundamentals — Hard

What is the purpose of Kubernetes finalizers and how can they prevent resource deletion?

Accepted Answer

Kubernetes finalizers prevent resource deletion by requiring controllers to remove them after cleanup tasks. The correct answer explains this mechanism, highlighting the potential for objects to get stuck in a Terminating state. Incorrect options misinterpret finalizers as containers or admission webhooks. Finalizers are actually metadata keys.