Answer
Finalizers block deletion until cleanup is complete; controllers remove finalizers afterward.
Quick Answer
Finalizers are strings added to an object's metadata.finalizers list. A delete request sets deletionTimestamp but doesn't actually delete the object — the object lingers until all finalizers are removed. Controllers (often operators) watch for this state, perform cleanup tasks (like deleting external cloud resources), then remove their finalizer, allowing the object to be fully deleted.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ