Add LAB06: Deploying with Crossplane

[Copilot]

Adds an optional specialization lab covering Crossplane as a Kubernetes-native control plane for cloud infrastructure — completing the trilogy of cloud provisioning approaches alongside ASO (LAB03) and Terranetes (LAB05). Prerequisites: LAB01–03 only.

New files

• LAB06.md — Full lab guide (~800 lines, 6 parts + stretch + cleanup):

  • Part 1: Crossplane install via Helm + CLI plugin
  • Part 2: Azure provider family + ProviderConfig (reuses LAB03 Service Principal)
  • Part 3: Direct Managed Resource deployment with drift-correction demo
  • Part 4: XRD + Composition — platform abstraction over RG + StorageAccount
  • Part 5: Developer self-service via AppStorageClaim + ArgoCD GitOps loop
  • Part 6 (stretch): GitHub provider demonstrating multi-provider Compositions

• lab06/crossplane/ — Ready-to-apply manifests:

  File	Purpose
  provider-family-azure.yaml	Azure family + storage sub-provider
  providerconfig-azure.yaml	ProviderConfig referencing SP secret
  managed-resources/resourcegroup.yaml	Direct ResourceGroup MR
  managed-resources/storageaccount.yaml	Direct StorageAccount MR with RG cross-reference
  composition/xrd.yaml	XRD defining AppStorage concept (exposes both XR + Claim CRDs)
  composition/composition.yaml	Composition: XAppStorage → RG + SA with field-path patches
  claims/app-storage-claim.yaml	Developer-facing AppStorageClaim example
  argocd/argocd-application.yaml	ArgoCD Application syncing a crossplane-claims/ Git directory
  stretch/provider-github.yaml	GitHub provider + ProviderConfig + example Repository MR

• lab06/README.md — Directory structure, quick-start commands, cleanup steps.

Updated files

• README.md — LAB06 added to the Optional Labs section alongside LAB05.

Design

The Composition layer is the pedagogical centrepiece — developers submit a 3-parameter Claim while the platform team owns all Azure-specific complexity:

# What a developer commits to Git:
apiVersion: platform.workshop.io/v1alpha1
kind: AppStorageClaim
metadata:
  name: myapp-storage
  namespace: team-alpha
spec:
  parameters:
    resourceGroupName: rg-alice-crossplane-claim
    storageAccountName: stalicecpclaim
    location: swedencentral
    environment: workshop
  compositionRef:
    name: appstorage-composition

ArgoCD picks this up from Git and Crossplane reconciles it into a ResourceGroup + StorageAccount in Azure.