POC: autoscaling from zero

api/v1beta1/nutanixmachinetemplate_types.go

@@ -17,6 +17,7 @@ limitations under the License.
 package v1beta1
 
 import (
+	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	capiv1 "sigs.k8s.io/cluster-api/api/v1beta1"
 )
@@ -25,14 +26,23 @@ import (
 
 const (
 	// NutanixMachineTemplateKind represents the Kind of NutanixMachineTemplate
-	NutanixMachineTemplateKind = "NutanixMachineTemplate"
+	NutanixMachineTemplateKind                     = "NutanixMachineTemplate"
+	AutoscalerResourceCPU      corev1.ResourceName = "cpu"
+	AutoscalerResourceMemory   corev1.ResourceName = "memory"
+	// NutanixMachineTemplateFinalizer is the finalizer for NutanixMachineTemplate objects
+	NutanixMachineTemplateFinalizer = "infrastructure.cluster.x-k8s.io/nutanixmachinetemplate"
 )
 
 // NutanixMachineTemplateSpec defines the desired state of NutanixMachineTemplate
 type NutanixMachineTemplateSpec struct {
 	Template NutanixMachineTemplateResource `json:"template"`
 }
 
+// NutanixMachineTemplateStatus defines the observed state of a NutanixMachineTemplate
+type NutanixMachineTemplateStatus struct {
+	Capacity corev1.ResourceList `json:"capacity,omitempty"`
+}
+
 //+kubebuilder:object:root=true
 //+kubebuilder:resource:path=nutanixmachinetemplates,shortName=nmtmpl,scope=Namespaced,categories=cluster-api
 //+kubebuilder:storageversion
@@ -42,7 +52,8 @@ type NutanixMachineTemplate struct {
 	metav1.TypeMeta   `json:",inline"`
 	metav1.ObjectMeta `json:"metadata,omitempty"`
 
-	Spec NutanixMachineTemplateSpec `json:"spec,omitempty"`
+	Spec   NutanixMachineTemplateSpec   `json:"spec,omitempty"`
+	Status NutanixMachineTemplateStatus `json:"status,omitempty"`
 }
 
 //+kubebuilder:object:root=true

config/crd/bases/infrastructure.cluster.x-k8s.io_nutanixmachinetemplates.yaml

@@ -532,6 +532,20 @@ spec:
             required:
             - template
             type: object
+          status:
+            description: NutanixMachineTemplateStatus defines the observed state of
+              a NutanixMachineTemplate
+            properties:
+              capacity:
+                additionalProperties:
+                  anyOf:
+                  - type: integer
+                  - type: string
+                  pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
+                  x-kubernetes-int-or-string: true
+                description: ResourceList is a set of (resource name, quantity) pairs.
+                type: object
+            type: object
         type: object
     served: true
     storage: true

config/rbac/role.yaml

@@ -60,6 +60,7 @@ rules:
   - nutanixclusters
   - nutanixfailuredomains
   - nutanixmachines
+  - nutanixmachinetemplates
   verbs:
   - create
   - delete
@@ -73,6 +74,7 @@ rules:
   resources:
   - nutanixclusters/finalizers
   - nutanixmachines/finalizers
+  - nutanixmachinetemplates/finalizers
   verbs:
   - update
 - apiGroups:
@@ -82,6 +84,7 @@ rules:
   - nutanixfailuredomains/finalizers
   - nutanixfailuredomains/status
   - nutanixmachines/status
+  - nutanixmachinetemplates/status
   verbs:
   - get
   - patch