rolebinding-primitive

README

RoleBinding Primitive Example

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

• Base Construction: Initializing a RoleBinding with an immutable roleRef and basic metadata.
• Feature Mutations: Composing subjects from independent, feature-gated mutations using EditSubjects.
• Metadata Mutations: Setting version labels on the RoleBinding via EditObjectMetadata.
• Data Extraction: Inspecting subjects and roleRef after each reconcile cycle.

Directory Structure

• app/: Defines the controller that uses the component framework. The ExampleApp CRD is shared from examples/shared/app.
• features/: Contains modular feature definitions:
  • mutations.go: base subject binding, version labelling, and feature-gated monitoring subject.
• resources/: Contains the central NewRoleBindingResource factory that assembles all features using rolebinding.Builder.
• main.go: A standalone entry point that demonstrates multiple reconciliation cycles with a fake client.

Running the Example

go run examples/rolebinding-primitive/main.go

This will:

1. Initialize a fake Kubernetes client.
2. Create an ExampleApp owner object.
3. Reconcile through three spec variations, printing the subjects after each cycle.
4. Print the resulting status conditions.

Documentation

Overview

Package main is the entry point for the rolebinding primitive example.