In an overlay kustomization.yaml, how do you refer to an overlay file called replica_count.yaml?

• A. patches: - replica_count.yaml
• B. overlays: replica_count.yaml
• C. resources: replica_count.yaml
• D. patchesStrategicMerge: - replica_count.yaml

Answer: (A)

In an overlay, changes to existing resources are applied through patch files listed under patches. Each entry points to a patch file that contains the modification you want to apply. So to reference a patch file named replica_count.yaml, you place it in the patches list like this:

patches:

• replica_count.yaml

This tells Kustomize to apply that patch when building the overlay, modifying the target resource (for example, adjusting the replicas field in a Deployment) according to the patch contents.

The other options don’t reflect how patches are referenced in an overlay: overlays is not a standard field for listing patch files; resources is used to bring in base resources, not to apply patches; and patchesStrategicMerge is used only when you intend to apply a strategic merge patch, which is a different patch mechanism.