Templates are the heart of kTailor. They are stored as Kubernetes ConfigMaps with the label ktailor.dev/template: "true".

Scope: Central vs. Local

• Central: The webhook looks for the ConfigMap in its own namespace (usually ktailor). These are globally managed.
• Local: The webhook looks for the ConfigMap in the target Deployment’s namespace.

The 4 Phases Overview

kTailor applies modifications in four distinct phases:

1. modifyContainers: Alters existing containers.
2. addContainers: Injects new sidecar containers.
3. addInitContainers: Injects initialization containers.
4. addVolumes: Injects new Pod volumes.

Important Note: All elements within these phases (like environment variables, container definitions, volume mounts, and volumes) are written exactly as they are in a standard Kubernetes Deployment manifest. You do not need to learn a new syntax!