add ProvisioningModel to enable gcp spot instances

Author: de1987

machine/v1beta1/types_gcpprovider.go

@@ -25,6 +25,14 @@ const (
 	RestartPolicyNever GCPRestartPolicyType = "Never"
 )
 
+// GCPProvisioningModelType is a type representing acceptable values for ProvisioningModel field in GCPMachineProviderSpec
+type GCPProvisioningModelType string
+
+const (
+	// GCPSpotInstance enables the GCP instances as spot instances which provide significant cost savings but may be preempted by Google Cloud Platform when resources are needed elsewhere.
+	GCPSpotInstance GCPProvisioningModelType = "Spot"
+)
+
 // SecureBootPolicy represents the secure boot configuration for the GCP machine.
 type SecureBootPolicy string
 
@@ -129,6 +137,14 @@ type GCPMachineProviderSpec struct {
 	// preemptible indicates if created instance is preemptible.
 	// +optional
 	Preemptible bool `json:"preemptible,omitempty"`
+	// provisioningModel is an optional field that determines the provisioning model for the GCP machine instance.
+	// Valid values are "Spot".
+	// When set to Spot, the instance runs as a Google Cloud Spot instance which provides significant cost savings but may be preempted by Google Cloud Platform when resources are needed elsewhere.
+	// When omitted, the machine will be provisioned as a standard on-demand instance.
+	// This field cannot be used together with the preemptible field.
+	// +optional
+	// +kubebuilder:validation:Enum=Spot
+	ProvisioningModel GCPProvisioningModelType `json:"provisioningModel,omitempty"`
 	// onHostMaintenance determines the behavior when a maintenance event occurs that might cause the instance to reboot.
 	// This is required to be set to "Terminate" if you want to provision machine with attached GPUs.
 	// Otherwise, allowed values are "Migrate" and "Terminate".

machine/v1beta1/zz_generated.swagger_doc_generated.go

@@ -22911,6 +22911,10 @@
           "description": "projectID is the project in which the GCP machine provider will create the VM.",
           "type": "string"
         },
+        "provisioningModel": {
+          "description": "provisioningModel is an optional field that determines the provisioning model for the GCP machine instance. Valid values are \"Spot\". When set to Spot, the instance runs as a Google Cloud Spot instance which provides significant cost savings but may be preempted by Google Cloud Platform when resources are needed elsewhere. When omitted, the machine will be provisioned as a standard on-demand instance. This field cannot be used together with the preemptible field.",
+          "type": "string"
+        },
         "region": {
           "description": "region is the region in which the GCP machine provider will create the VM.",
           "type": "string",