pod-primitive

Pod Primitive Example

This example demonstrates the usage of the pod primitive within the operator component framework. It shows how to manage a Kubernetes Pod as a component of a larger application, utilizing features like:

• Base Construction: Initializing a Pod with basic metadata and spec.
• Feature Mutations: Applying version-gated or conditional metadata changes (labels) using the Mutator.
• Suspension: Deleting the pod when the component is suspended (pods cannot be paused).
• Data Extraction: Harvesting information from the reconciled resource.

Directory Structure

• app/: Defines the mock ExampleApp CRD and the controller that uses the component framework.
• features/: Contains modular feature definitions:
  • mutations.go: label mutations applied to the Pod using the Mutator.
• resources/: Contains the central NewPodResource factory that assembles all features using the pod.Builder.
• main.go: A standalone entry point that demonstrates a single reconciliation loop using a fake client.

Running the Example

You can run this example directly using go run:

go run examples/pod-primitive/main.go

This will:

1. Initialize a fake Kubernetes client.
2. Create an ExampleApp owner object.
3. Reconcile the ExampleApp components through multiple spec changes.
4. Print the resulting status conditions.