Crossplane Infrastructure Management

Crossplane extends Kubernetes to manage cloud infrastructure using declarative APIs. It enables platform teams to build internal cloud platforms with self-service capabilities.

Architecture Overview

Core Components

1. Providers: Kubernetes controllers that provision infrastructure in external systems (AWS, GCP, Azure, etc.)
2. Managed Resources (MRs): Custom resources representing external infrastructure (S3 buckets, RDS instances, etc.)
3. Composite Resources (XRs): Higher-level abstractions composed of multiple managed resources
4. Composite Resource Definitions (XRDs): Schemas defining composite resource types
5. Compositions: Templates that map XRs to managed resources with transformation logic
6. Claims: Namespace-scoped resources that provision composite resources for application teams
7. Composition Functions: Extension points for complex transformation logic

Resource Hierarchy