feature toggle for using maintenance windows (#3074)

* feature toggle for using maintenance windows

pkg/apis/acid.zalan.do/v1/crds.go

@@ -105,6 +105,9 @@ var OperatorConfigCRDResourceValidation = apiextv1.CustomResourceValidation{
 					"enable_lazy_spilo_upgrade": {
 						Type: "boolean",
 					},
+					"enable_maintenance_windows": {
+						Type: "boolean",
+					},
 					"enable_shm_volume": {
 						Type: "boolean",
 					},

pkg/apis/acid.zalan.do/v1/operator_configuration_type.go

@@ -266,6 +266,7 @@ type OperatorConfigurationData struct {
 	Workers                       uint32                             `json:"workers,omitempty"`
 	ResyncPeriod                  Duration                           `json:"resync_period,omitempty"`
 	RepairPeriod                  Duration                           `json:"repair_period,omitempty"`
+	EnableMaintenanceWindows      *bool                              `json:"enable_maintenance_windows,omitempty"`
 	MaintenanceWindows            []MaintenanceWindow                `json:"maintenance_windows,omitempty"`
 	SetMemoryRequestToLimit       bool                               `json:"set_memory_request_to_limit,omitempty"`
 	ShmVolume                     *bool                              `json:"enable_shm_volume,omitempty"`

pkg/apis/acid.zalan.do/v1/zz_generated.deepcopy.go

@@ -433,6 +433,11 @@ func (in *OperatorConfigurationData) DeepCopyInto(out *OperatorConfigurationData
 		*out = make([]string, len(*in))
 		copy(*out, *in)
 	}
+	if in.EnableMaintenanceWindows != nil {
+		in, out := &in.EnableMaintenanceWindows, &out.EnableMaintenanceWindows
+		*out = new(bool)
+		**out = **in
+	}
 	if in.MaintenanceWindows != nil {
 		in, out := &in.MaintenanceWindows, &out.MaintenanceWindows
 		*out = make([]MaintenanceWindow, len(*in))