argocd/ — Argo CD Applications + ApplicationSet

The platform's delivery spine. The management cluster (us-east, by convention) runs the single Argo CD instance; it has all three regional clusters registered via argocd cluster add and fans the platform out by:

File	Kind	What it deploys
applicationset-platform.yaml	ApplicationSet (Cluster generator)	The platform-base stack into every region's cluster, using ../kustomize/regions/<REGION>/.
application-keycloak.yaml	Application (Helm)	Bitnami Keycloak chart (pinned), realm imported from ../auth/keycloak-realm-import.cm.yaml.
application-crossplane.yaml	Application (Helm)	crossplane-stable Crossplane chart (pinned), into crossplane-system.

System operators (Crossplane, Keycloak) each get their OWN namespace + their own pinned Helm chart. None of them install into a platform namespace; none of them install via releases/latest/download/<PINNED-FILE>.yaml. That discipline is the same hard invariant the v1 Bookstore follows for cnpg- operator and ESO.

Why the ApplicationSet over per-cluster Applications

Three regions today; tomorrow there could be six. The ApplicationSet Cluster generator scales linearly with the cluster count, no copy-paste. The Application name + the path-template do the rest. The Part 11 ch.06 pattern, made the platform's spine.

Apply order

# Install Argo CD itself (Part 07 ch.04 pinned-Helm install).
# Then register the three regional clusters with region labels:
argocd cluster add kind-bookstore-platform-us-east \
  --label bookstore-platform.example.com/region=us-east
argocd cluster add kind-bookstore-platform-eu-west \
  --label bookstore-platform.example.com/region=eu-west
argocd cluster add kind-bookstore-platform-ap-southeast \
  --label bookstore-platform.example.com/region=ap-southeast

# Apply the Applications + ApplicationSet (from the management cluster):
kubectl apply -f examples/bookstore-platform/argocd/application-crossplane.yaml
kubectl apply -f examples/bookstore-platform/argocd/application-keycloak.yaml
kubectl apply -f examples/bookstore-platform/argocd/applicationset-platform.yaml

kubectl get applications -n argocd

CRD-intrinsic dry-runs

Application and ApplicationSet both fail --dry-run=client with the documented no matches for kind message before Argo CD is installed.