Initial reconciliation loop

This deals with creation, update, removal of clusters from the AKS
provider.

Co-authored-by: Kevin McDermott <kevin@weave.works>

Dockerfile

@@ -13,16 +13,17 @@ COPY go.sum go.sum
 COPY vendor vendor
 
 # Copy the go source
-COPY cmd/main.go cmd/main.go
+COPY main.go main.go
 COPY api/ api/
+COPY pkg/ pkg/
 COPY internal/controller/ internal/controller/
 
 # Build
 # the GOARCH has not a default value to allow the binary be built according to the host where the command
 # was called. For example, if we call make docker-build in a local env which has the Apple Silicon M1 SO
 # the docker BUILDPLATFORM arg will be linux/arm64 when for Apple x86 it will be linux/amd64. Therefore,
 # by leaving it empty we can ensure that the container and binary shipped on it will have the same platform.
-RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o manager cmd/main.go
+RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o manager main.go
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details

Makefile

@@ -76,11 +76,11 @@ test: manifests generate fmt vet envtest ## Run tests.
 
 .PHONY: build
 build: manifests generate fmt vet ## Build manager binary.
-	go build -o bin/manager cmd/main.go
+	go build -o bin/manager main.go
 
 .PHONY: run
 run: manifests generate fmt vet ## Run a controller from your host.
-	go run ./cmd/main.go
+	go run main.go
 
 # If you wish to build the manager image targeting other platforms you can use the --platform flag.
 # (i.e. docker build --platform linux/arm64). However, you must enable docker buildKit for it.

TODO.md

@@ -0,0 +1,7 @@
+Steps before release of the AKS reflector
+
+- [ ] Secret does not exist but cluster exists - Create a new secret
+- [ ] Partial apply of clusters - ensure that subsequent reconciliations work
+- [ ] Add managed-by labels!
+- [ ] Conditions - ready with count of reflected clusters
+- [ ] Events - publish when cluster created or removed

api/v1alpha1/automatedclusterdiscovery_types.go

@@ -20,13 +20,11 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
-// EDIT THIS FILE!  THIS IS SCAFFOLDING FOR YOU TO OWN!
-// NOTE: json tags are required.  Any new fields you add must have json tags for the fields to be serialized.
-
 // AKS defines the desired state of AKS
 type AKS struct {
 	// SubscriptionID is the Azure subscription ID
-	SubscriptionID string `json:"subscriptionId,omitempty"`
+	// +required
+	SubscriptionID string `json:"subscriptionID"`
 
 	Filter AKSFilter `json:"filter,omitempty"`
 
@@ -42,22 +40,26 @@ type AKSFilter struct {
 
 // AutomatedClusterDiscoverySpec defines the desired state of AutomatedClusterDiscovery
 type AutomatedClusterDiscoverySpec struct {
-	// INSERT ADDITIONAL SPEC FIELDS - desired state of cluster
-	// Important: Run "make" to regenerate code after modifying this file
-
 	// Name is the name of the cluster
 	Name string `json:"name,omitempty"`
 
 	// Type is the provider type
-	Type string `json:"type,omitempty"`
+	// +kubebuilder:validation:Enum=aks
+	Type string `json:"type"`
 
 	AKS *AKS `json:"aks,omitempty"`
+
+	// The interval at which to run the discovery
+	// +required
+	Interval metav1.Duration `json:"interval"`
 }
 
 // AutomatedClusterDiscoveryStatus defines the observed state of AutomatedClusterDiscovery
 type AutomatedClusterDiscoveryStatus struct {
-	// INSERT ADDITIONAL STATUS FIELD - define observed state of cluster
-	// Important: Run "make" to regenerate code after modifying this file
+	// Inventory contains the list of Kubernetes resource object references that
+	// have been successfully applied
+	// +optional
+	Inventory *ResourceInventory `json:"inventory,omitempty"`
 }
 
 //+kubebuilder:object:root=true

api/v1alpha1/inventory.go

@@ -0,0 +1,37 @@
+package v1alpha1
+
+import (
+	"fmt"
+
+	runtime "k8s.io/apimachinery/pkg/runtime"
+	"sigs.k8s.io/cli-utils/pkg/object"
+)
+
+// ResourceInventory contains a list of Kubernetes resource object references that have been applied by a Kustomization.
+type ResourceInventory struct {
+	// Entries of Kubernetes resource object references.
+	Entries []ResourceRef `json:"entries,omitempty"`
+}
+
+// ResourceRef contains the information necessary to locate a resource within a cluster.
+type ResourceRef struct {
+	// ID is the string representation of the Kubernetes resource object's metadata,
+	// in the format '<namespace>_<name>_<group>_<kind>'.
+	ID string `json:"id"`
+
+	// Version is the API version of the Kubernetes resource object's kind.
+	Version string `json:"v"`
+}
+
+// ResourceRefFromObject returns a ResourceRef from a runtime.Object.
+func ResourceRefFromObject(obj runtime.Object) (ResourceRef, error) {
+	objMeta, err := object.RuntimeToObjMeta(obj)
+	if err != nil {
+		return ResourceRef{}, fmt.Errorf("failed to parse object Metadata: %w", err)
+	}
+
+	return ResourceRef{
+		ID:      objMeta.String(),
+		Version: obj.GetObjectKind().GroupVersionKind().Version,
+	}, nil
+}

config/crd/bases/clusters.weave.works_automatedclusterdiscoveries.yaml

@@ -51,20 +51,55 @@ spec:
                         description: Location is the location of the AKS clusters
                         type: string
                     type: object
-                  subscriptionId:
+                  subscriptionID:
                     description: SubscriptionID is the Azure subscription ID
                     type: string
+                required:
+                - subscriptionID
                 type: object
+              interval:
+                description: The interval at which to run the discovery
+                type: string
               name:
                 description: Name is the name of the cluster
                 type: string
               type:
                 description: Type is the provider type
+                enum:
+                - aks
                 type: string
+            required:
+            - interval
+            - type
             type: object
           status:
             description: AutomatedClusterDiscoveryStatus defines the observed state
               of AutomatedClusterDiscovery
+            properties:
+              inventory:
+                description: Inventory contains the list of Kubernetes resource object
+                  references that have been successfully applied
+                properties:
+                  entries:
+                    description: Entries of Kubernetes resource object references.
+                    items:
+                      description: ResourceRef contains the information necessary
+                        to locate a resource within a cluster.
+                      properties:
+                        id:
+                          description: ID is the string representation of the Kubernetes
+                            resource object's metadata, in the format '<namespace>_<name>_<group>_<kind>'.
+                          type: string
+                        v:
+                          description: Version is the API version of the Kubernetes
+                            resource object's kind.
+                          type: string
+                      required:
+                      - id
+                      - v
+                      type: object
+                    type: array
+                type: object
             type: object
         type: object
     served: true