add gateway to subnet

api/ipam/v1alpha1/ip_types.go

@@ -36,6 +36,8 @@ type IPStatus struct {
 	State IPState `json:"state,omitempty"`
 	// Reserved is a reserved IP
 	Reserved *IPAddr `json:"reserved,omitempty"`
+	// Gateway represents the gateway address for the subnet
+	Gateway *IPAddr `json:"gateway,omitempty"`
 	// Message contains error details if the one has occurred
 	Message string `json:"message,omitempty"`
 }

api/ipam/v1alpha1/subnet_types.go

@@ -35,6 +35,9 @@ type SubnetSpec struct {
 	// Regions represents the network service location
 	// +kubebuilder:validation:Optional
 	Regions []Region `json:"regions,omitempty"`
+	// Gateway represents the gateway address for the subnet
+	// +kubebuilder:validation:Optional
+	Gateway *IPAddr `json:"gateway,omitempty"`
 	// Consumer refers to resource Subnet has been booked for
 	// +kubebuilder:validation:Optional
 	Consumer *ResourceReference `json:"consumer,omitempty"`

controllers/ip_controller.go

@@ -167,6 +167,14 @@ func (r *IPReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Re
 		return ctrl.Result{}, err
 	}
 
+	if subnet.Spec.Gateway != nil {
+		ip.Status.Gateway = subnet.Spec.Gateway
+		if err := r.Status().Update(ctx, ip); err != nil {
+			log.Error(err, "unable to update ip status", "name", req.NamespacedName, "name", subnetNamespacedName)
+			return ctrl.Result{}, err
+		}
+	}
+
 	ip.Status.State = v1alpha1.CFinishedIPState
 	ip.Status.Message = ""
 	ip.Status.Reserved = ipCidrToReserve.AsIPAddr()

controllers/subnet_controller.go

@@ -72,6 +72,15 @@ func (r *SubnetReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctr
 		return ctrl.Result{}, err
 	}
 
+	// Remove gateway IP from the vacant list
+	var gwToReserve *v1alpha1.CIDR
+	if subnet.Spec.Gateway != nil {
+		gwToReserve = subnet.Spec.Gateway.AsCidr()
+		if err := subnet.Reserve(gwToReserve); err != nil {
+			return ctrl.Result{}, err
+		}
+	}
+
 	// If deletion timestamp is present,
 	// then resource is scheduled for deletion.
 	if subnet.GetDeletionTimestamp() != nil {