Scheduled scaling: add an optional scaling window

Signed-off-by: Alexey Ermakov <alexey.ermakov@zalando.de>

docs/cluster_scaling_schedules_crd.yaml

@@ -37,6 +37,11 @@ spec:
           spec:
             description: ScalingScheduleSpec is the spec part of the ScalingSchedule.
             properties:
+              scalingWindowDurationMinutes:
+                description: Fade the scheduled values in and out over this many minutes.
+                  If unset, the default per-cluster value will be used.
+                format: int64
+                type: integer
               schedules:
                 description: Schedules is the list of schedules for this ScalingSchedule
                   resource. All the schedules defined here will result on the value
@@ -96,6 +101,7 @@ spec:
                     value:
                       description: The metric value that will be returned for the
                         defined schedule.
+                      format: int64
                       type: integer
                   required:
                   - durationMinutes

docs/scaling_schedules_crd.yaml

@@ -37,6 +37,11 @@ spec:
           spec:
             description: ScalingScheduleSpec is the spec part of the ScalingSchedule.
             properties:
+              scalingWindowDurationMinutes:
+                description: Fade the scheduled values in and out over this many minutes.
+                  If unset, the default per-cluster value will be used.
+                format: int64
+                type: integer
               schedules:
                 description: Schedules is the list of schedules for this ScalingSchedule
                   resource. All the schedules defined here will result on the value
@@ -96,6 +101,7 @@ spec:
                     value:
                       description: The metric value that will be returned for the
                         defined schedule.
+                      format: int64
                       type: integer
                   required:
                   - durationMinutes

pkg/apis/zalando.org/v1/types.go

@@ -1,6 +1,8 @@
 package v1
 
 import (
+	"time"
+
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
@@ -37,6 +39,10 @@ type ClusterScalingSchedule struct {
 // ScalingScheduleSpec is the spec part of the ScalingSchedule.
 // +k8s:deepcopy-gen=true
 type ScalingScheduleSpec struct {
+	// Fade the scheduled values in and out over this many minutes. If unset, the default per-cluster value will be used.
+	// +optional
+	ScalingWindowDurationMinutes *int64 `json:"scalingWindowDurationMinutes,omitempty"`
+
 	// Schedules is the list of schedules for this ScalingSchedule
 	// resource. All the schedules defined here will result on the value
 	// to the same metric. New metrics require a new ScalingSchedule
@@ -59,7 +65,11 @@ type Schedule struct {
 	// returned for the defined schedule.
 	DurationMinutes int `json:"durationMinutes"`
 	// The metric value that will be returned for the defined schedule.
-	Value int `json:"value"`
+	Value int64 `json:"value"`
+}
+
+func (in Schedule) Duration() time.Duration {
+	return time.Duration(in.DurationMinutes) * time.Minute
 }
 
 // Defines if the schedule is a OneTime schedule or

pkg/apis/zalando.org/v1/zz_generated.deepcopy.go

@@ -147,6 +147,11 @@ func (in *ScalingScheduleList) DeepCopyObject() runtime.Object {
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *ScalingScheduleSpec) DeepCopyInto(out *ScalingScheduleSpec) {
 	*out = *in
+	if in.ScalingWindowDurationMinutes != nil {
+		in, out := &in.ScalingWindowDurationMinutes, &out.ScalingWindowDurationMinutes
+		*out = new(int64)
+		**out = **in
+	}
 	if in.Schedules != nil {
 		in, out := &in.Schedules, &out.Schedules
 		*out = make([]Schedule, len(*in))

pkg/collector/scaling_schedule_collector.go

@@ -3,6 +3,7 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"math"
 	"time"
 
 	v1 "github.com/zalando-incubator/kube-metrics-adapter/pkg/apis/zalando.org/v1"
@@ -80,6 +81,7 @@ type Store interface {
 type ScalingScheduleCollectorPlugin struct {
 	store                Store
 	now                  Now
+	defaultScalingWindow time.Duration
 }
 
 // ClusterScalingScheduleCollectorPlugin is a collector plugin for initializing metrics
@@ -87,21 +89,24 @@ type ScalingScheduleCollectorPlugin struct {
 type ClusterScalingScheduleCollectorPlugin struct {
 	store                Store
 	now                  Now
+	defaultScalingWindow time.Duration
 }
 
 // NewScalingScheduleCollectorPlugin initializes a new ScalingScheduleCollectorPlugin.
-func NewScalingScheduleCollectorPlugin(store Store, now Now) (*ScalingScheduleCollectorPlugin, error) {
+func NewScalingScheduleCollectorPlugin(store Store, now Now, defaultScalingWindow time.Duration) (*ScalingScheduleCollectorPlugin, error) {
 	return &ScalingScheduleCollectorPlugin{
 		store:                store,
 		now:                  now,
+		defaultScalingWindow: defaultScalingWindow,
 	}, nil
 }
 
 // NewClusterScalingScheduleCollectorPlugin initializes a new ClusterScalingScheduleCollectorPlugin.
-func NewClusterScalingScheduleCollectorPlugin(store Store, now Now) (*ClusterScalingScheduleCollectorPlugin, error) {
+func NewClusterScalingScheduleCollectorPlugin(store Store, now Now, defaultScalingWindow time.Duration) (*ClusterScalingScheduleCollectorPlugin, error) {
 	return &ClusterScalingScheduleCollectorPlugin{
 		store:                store,
 		now:                  now,
+		defaultScalingWindow: defaultScalingWindow,
 	}, nil
 }
 
@@ -109,14 +114,14 @@ func NewClusterScalingScheduleCollectorPlugin(store Store, now Now) (*ClusterSca
 // specified HPA. It's the only required method to implement the
 // collector.CollectorPlugin interface.
 func (c *ScalingScheduleCollectorPlugin) NewCollector(hpa *autoscalingv2.HorizontalPodAutoscaler, config *MetricConfig, interval time.Duration) (Collector, error) {
-	return NewScalingScheduleCollector(c.store, c.now, hpa, config, interval)
+	return NewScalingScheduleCollector(c.store, c.defaultScalingWindow, c.now, hpa, config, interval)
 }
 
 // NewCollector initializes a new cluster wide scaling schedule
 // collector from the specified HPA. It's the only required method to
 // implement the collector.CollectorPlugin interface.
 func (c *ClusterScalingScheduleCollectorPlugin) NewCollector(hpa *autoscalingv2.HorizontalPodAutoscaler, config *MetricConfig, interval time.Duration) (Collector, error) {
-	return NewClusterScalingScheduleCollector(c.store, c.now, hpa, config, interval)
+	return NewClusterScalingScheduleCollector(c.store, c.defaultScalingWindow, c.now, hpa, config, interval)
 }
 
 // ScalingScheduleCollector is a metrics collector for time based
@@ -142,10 +147,11 @@ type scalingScheduleCollector struct {
 	hpa                  *autoscalingv2.HorizontalPodAutoscaler
 	interval             time.Duration
 	config               MetricConfig
+	defaultScalingWindow time.Duration
 }
 
 // NewScalingScheduleCollector initializes a new ScalingScheduleCollector.
-func NewScalingScheduleCollector(store Store, now Now, hpa *autoscalingv2.HorizontalPodAutoscaler, config *MetricConfig, interval time.Duration) (*ScalingScheduleCollector, error) {
+func NewScalingScheduleCollector(store Store, defaultScalingWindow time.Duration, now Now, hpa *autoscalingv2.HorizontalPodAutoscaler, config *MetricConfig, interval time.Duration) (*ScalingScheduleCollector, error) {
 	return &ScalingScheduleCollector{
 		scalingScheduleCollector{
 			store:                store,
@@ -155,12 +161,13 @@ func NewScalingScheduleCollector(store Store, now Now, hpa *autoscalingv2.Horizo
 			metric:               config.Metric,
 			interval:             interval,
 			config:               *config,
+			defaultScalingWindow: defaultScalingWindow,
 		},
 	}, nil
 }
 
 // NewClusterScalingScheduleCollector initializes a new ScalingScheduleCollector.
-func NewClusterScalingScheduleCollector(store Store, now Now, hpa *autoscalingv2.HorizontalPodAutoscaler, config *MetricConfig, interval time.Duration) (*ClusterScalingScheduleCollector, error) {
+func NewClusterScalingScheduleCollector(store Store, defaultScalingWindow time.Duration, now Now, hpa *autoscalingv2.HorizontalPodAutoscaler, config *MetricConfig, interval time.Duration) (*ClusterScalingScheduleCollector, error) {
 	return &ClusterScalingScheduleCollector{
 		scalingScheduleCollector{
 			store:                store,
@@ -170,6 +177,7 @@ func NewClusterScalingScheduleCollector(store Store, now Now, hpa *autoscalingv2
 			metric:               config.Metric,
 			interval:             interval,
 			config:               *config,
+			defaultScalingWindow: defaultScalingWindow,
 		},
 	}, nil
 }
@@ -188,7 +196,7 @@ func (c *ScalingScheduleCollector) GetMetrics() ([]CollectedMetric, error) {
 	if !ok {
 		return nil, ErrNotScalingScheduleFound
 	}
-	return calculateMetrics(scalingSchedule.Spec.Schedules, c.now(), c.objectReference, c.metric)
+	return calculateMetrics(scalingSchedule.Spec, c.defaultScalingWindow, c.now(), c.objectReference, c.metric)
 }
 
 // GetMetrics is the main implementation for collector.Collector interface
@@ -221,7 +229,7 @@ func (c *ClusterScalingScheduleCollector) GetMetrics() ([]CollectedMetric, error
 		clusterScalingSchedule = v1.ClusterScalingSchedule(*scalingSchedule)
 	}
 
-	return calculateMetrics(clusterScalingSchedule.Spec.Schedules, c.now(), c.objectReference, c.metric)
+	return calculateMetrics(clusterScalingSchedule.Spec, c.defaultScalingWindow, c.now(), c.objectReference, c.metric)
 }
 
 // Interval returns the interval at which the collector should run.
@@ -234,9 +242,17 @@ func (c *ClusterScalingScheduleCollector) Interval() time.Duration {
 	return c.interval
 }
 
-func calculateMetrics(schedules []v1.Schedule, now time.Time, objectReference custom_metrics.ObjectReference, metric autoscalingv2.MetricIdentifier) ([]CollectedMetric, error) {
+func calculateMetrics(spec v1.ScalingScheduleSpec, defaultScalingWindow time.Duration, now time.Time, objectReference custom_metrics.ObjectReference, metric autoscalingv2.MetricIdentifier) ([]CollectedMetric, error) {
-	value := 0
+	scalingWindowDuration := defaultScalingWindow
-	for _, schedule := range schedules {
+	if spec.ScalingWindowDurationMinutes != nil {
+		scalingWindowDuration = time.Duration(*spec.ScalingWindowDurationMinutes) * time.Minute
+	}
+	if scalingWindowDuration < 0 {
+		return nil, fmt.Errorf("scaling window duration cannot be negative")
+	}
+
+	value := int64(0)
+	for _, schedule := range spec.Schedules {
 		switch schedule.Type {
 		case v1.RepeatingSchedule:
 			location, err := time.LoadLocation(schedule.Period.Timezone)
@@ -269,9 +285,7 @@ func calculateMetrics(schedules []v1.Schedule, now time.Time, objectReference cu
 						parsedStartTime.Nanosecond(),
 						location,
 					)
-					if within(now, scheduledTime, schedule.DurationMinutes) && schedule.Value > value {
+					value = maxInt64(value, valueForEntry(now, scheduledTime, schedule.Duration(), scalingWindowDuration, schedule.Value))
-						value = schedule.Value
-					}
 					break
 				}
 			}
@@ -280,9 +294,8 @@ func calculateMetrics(schedules []v1.Schedule, now time.Time, objectReference cu
 			if err != nil {
 				return nil, ErrInvalidScheduleDate
 			}
-			if within(now, scheduledTime, schedule.DurationMinutes) && schedule.Value > value {
+
-				value = schedule.Value
+			value = maxInt64(value, valueForEntry(now, scheduledTime, schedule.Duration(), scalingWindowDuration, schedule.Value))
-			}
 		}
 	}
 
@@ -293,17 +306,47 @@ func calculateMetrics(schedules []v1.Schedule, now time.Time, objectReference cu
 			Custom: custom_metrics.MetricValue{
 				DescribedObject: objectReference,
 				Timestamp:       metav1.Time{Time: now},
-				Value:           *resource.NewMilliQuantity(int64(value*1000), resource.DecimalSI),
+				Value:           *resource.NewMilliQuantity(value*1000, resource.DecimalSI),
 				Metric:          custom_metrics.MetricIdentifier(metric),
 			},
 		},
 	}, nil
 }
 
-// within receive two time.Time and a number of minutes. It returns true
+func valueForEntry(timestamp time.Time, startTime time.Time, entryDuration time.Duration, scalingWindowDuration time.Duration, value int64) int64 {
-// if the first given time, instant, is within the period of the second
+	scaleUpStart := startTime.Add(-scalingWindowDuration)
-// given time (start) plus the given number of minutes.
+	endTime := startTime.Add(entryDuration)
-func within(instant, start time.Time, minutes int) bool {
+	scaleUpEnd := endTime.Add(scalingWindowDuration)
-	return (instant.After(start) || instant.Equal(start)) &&
+
-		instant.Before(start.Add(time.Duration(minutes)*time.Minute))
+	if between(timestamp, startTime, endTime) {
+		return value
+	}
+	if between(timestamp, scaleUpStart, startTime) {
+		return scaledValue(timestamp, scaleUpStart, scalingWindowDuration, value)
+	}
+	if between(timestamp, endTime, scaleUpEnd) {
+		return scaledValue(scaleUpEnd, timestamp, scalingWindowDuration, value)
+	}
+	return 0
+}
+
+func scaledValue(timestamp time.Time, startTime time.Time, scalingWindowDuration time.Duration, value int64) int64 {
+	if scalingWindowDuration == 0 {
+		return 0
+	}
+	return int64(math.Ceil(math.Abs(float64(timestamp.Sub(startTime))) / float64(scalingWindowDuration) * float64(value)))
+}
+
+func between(timestamp, start, end time.Time) bool {
+	if timestamp.Before(start) {
+		return false
+	}
+	return timestamp.Before(end)
+}
+
+func maxInt64(i1, i2 int64) int64 {
+	if i1 > i2 {
+		return i1
+	}
+	return i2
 }

pkg/collector/scaling_schedule_collector_test.go

@@ -12,7 +12,10 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
-const hHMMFormat = "15:04"
+const (
+	hHMMFormat                   = "15:04"
+	defaultScalingWindowDuration = 1 * time.Minute
+)
 
 type schedule struct {
 	kind      string
@@ -21,7 +24,7 @@ type schedule struct {
 	days      []v1.ScheduleDay
 	timezone  string
 	duration  int
-	value     int
+	value     int64
 }
 
 func TestScalingScheduleCollector(t *testing.T) {
@@ -37,10 +40,13 @@ func TestScalingScheduleCollector(t *testing.T) {
 		return uTCNow
 	}
 
+	tenMinutes := int64(10)
+
 	for _, tc := range []struct {
 		msg                          string
 		schedules                    []schedule
-		expectedValue int
+		scalingWindowDurationMinutes *int64
+		expectedValue                int64
 		err                          error
 	}{
 		{
@@ -80,7 +86,45 @@ func TestScalingScheduleCollector(t *testing.T) {
 			expectedValue: 100,
 		},
 		{
-			msg: "Return the default value (0) for one time config - 30 seconds after",
+			msg: "Return the scaled value (67) for one time config - 20 seconds before starting",
+			schedules: []schedule{
+				{
+					date:     nowTime.Add(time.Second * 20).Format(time.RFC3339),
+					kind:     "OneTime",
+					duration: 45,
+					value:    100,
+				},
+			},
+			expectedValue: 67,
+		},
+		{
+			msg: "Return the scaled value (67) for one time config - 20 seconds after",
+			schedules: []schedule{
+				{
+					date:     nowTime.Add(-time.Minute * 45).Add(-time.Second * 20).Format(time.RFC3339),
+					kind:     "OneTime",
+					duration: 45,
+					value:    100,
+				},
+			},
+			expectedValue: 67,
+		},
+		{
+			msg:                          "Return the scaled value (95) for one time config with a custom scaling window - 30 seconds before starting",
+			scalingWindowDurationMinutes: &tenMinutes,
+			schedules: []schedule{
+				{
+					date:     nowTime.Add(time.Second * 30).Format(time.RFC3339),
+					kind:     "OneTime",
+					duration: 45,
+					value:    100,
+				},
+			},
+			expectedValue: 95,
+		},
+		{
+			msg:                          "Return the scaled value (95) for one time config with a custom scaling window - 30 seconds after",
+			scalingWindowDurationMinutes: &tenMinutes,
 			schedules: []schedule{
 				{
 					date:     nowTime.Add(-time.Minute * 45).Add(-time.Second * 30).Format(time.RFC3339),
@@ -89,7 +133,7 @@ func TestScalingScheduleCollector(t *testing.T) {
 					value:    100,
 				},
 			},
-			expectedValue: 0,
+			expectedValue: 95,
 		},
 		{
 			msg: "Return the default value (0) for one time config not started yet (20 minutes before)",
@@ -428,16 +472,16 @@ func TestScalingScheduleCollector(t *testing.T) {
 			namespace := "default"
 
 			schedules := getSchedules(tc.schedules)
-			store := newMockStore(scalingScheduleName, namespace, schedules)
+			store := newMockStore(scalingScheduleName, namespace, tc.scalingWindowDurationMinutes, schedules)
-			plugin, err := NewScalingScheduleCollectorPlugin(store, now)
+			plugin, err := NewScalingScheduleCollectorPlugin(store, now, defaultScalingWindowDuration)
 			require.NoError(t, err)
 
-			clusterStore := newClusterMockStore(scalingScheduleName, schedules)
+			clusterStore := newClusterMockStore(scalingScheduleName, tc.scalingWindowDurationMinutes, schedules)
-			clusterPlugin, err := NewClusterScalingScheduleCollectorPlugin(clusterStore, now)
+			clusterPlugin, err := NewClusterScalingScheduleCollectorPlugin(clusterStore, now, defaultScalingWindowDuration)
 			require.NoError(t, err)
 
-			clusterStoreFirstRun := newClusterMockStoreFirstRun(scalingScheduleName, schedules)
+			clusterStoreFirstRun := newClusterMockStoreFirstRun(scalingScheduleName, tc.scalingWindowDurationMinutes, schedules)
-			clusterPluginFirstRun, err := NewClusterScalingScheduleCollectorPlugin(clusterStoreFirstRun, now)
+			clusterPluginFirstRun, err := NewClusterScalingScheduleCollectorPlugin(clusterStoreFirstRun, now, defaultScalingWindowDuration)
 			require.NoError(t, err)
 
 			hpa := makeScalingScheduleHPA(namespace, scalingScheduleName)
@@ -505,14 +549,14 @@ func TestScalingScheduleObjectNotPresentReturnsError(t *testing.T) {
 		make(map[string]interface{}),
 		getByKeyFn,
 	}
-	plugin, err := NewScalingScheduleCollectorPlugin(store, time.Now)
+	plugin, err := NewScalingScheduleCollectorPlugin(store, time.Now, defaultScalingWindowDuration)
 	require.NoError(t, err)
 
 	clusterStore := mockStore{
 		make(map[string]interface{}),
 		getByKeyFn,
 	}
-	clusterPlugin, err := NewClusterScalingScheduleCollectorPlugin(clusterStore, time.Now)
+	clusterPlugin, err := NewClusterScalingScheduleCollectorPlugin(clusterStore, time.Now, defaultScalingWindowDuration)
 	require.NoError(t, err)
 
 	hpa := makeScalingScheduleHPA("namespace", "scalingScheduleName")
@@ -567,10 +611,10 @@ func TestReturnsErrorWhenStoreDoes(t *testing.T) {
 		},
 	}
 
-	plugin, err := NewScalingScheduleCollectorPlugin(store, time.Now)
+	plugin, err := NewScalingScheduleCollectorPlugin(store, time.Now, defaultScalingWindowDuration)
 	require.NoError(t, err)
 
-	clusterPlugin, err := NewClusterScalingScheduleCollectorPlugin(store, time.Now)
+	clusterPlugin, err := NewClusterScalingScheduleCollectorPlugin(store, time.Now, defaultScalingWindowDuration)
 	require.NoError(t, err)
 
 	hpa := makeScalingScheduleHPA("namespace", "scalingScheduleName")
@@ -615,7 +659,7 @@ func getByKeyFn(d map[string]interface{}, key string) (item interface{}, exists
 	return item, exists, nil
 }
 
-func newMockStore(name, namespace string, schedules []v1.Schedule) mockStore {
+func newMockStore(name, namespace string, scalingWindowDurationMinutes *int64, schedules []v1.Schedule) mockStore {
 	return mockStore{
 		map[string]interface{}{
 			fmt.Sprintf("%s/%s", namespace, name): &v1.ScalingSchedule{
@@ -623,6 +667,7 @@ func newMockStore(name, namespace string, schedules []v1.Schedule) mockStore {
 					Name: name,
 				},
 				Spec: v1.ScalingScheduleSpec{
+					ScalingWindowDurationMinutes: scalingWindowDurationMinutes,
 					Schedules:                    schedules,
 				},
 			},
@@ -631,7 +676,7 @@ func newMockStore(name, namespace string, schedules []v1.Schedule) mockStore {
 	}
 }
 
-func newClusterMockStore(name string, schedules []v1.Schedule) mockStore {
+func newClusterMockStore(name string, scalingWindowDurationMinutes *int64, schedules []v1.Schedule) mockStore {
 	return mockStore{
 		map[string]interface{}{
 			name: &v1.ClusterScalingSchedule{
@@ -639,6 +684,7 @@ func newClusterMockStore(name string, schedules []v1.Schedule) mockStore {
 					Name: name,
 				},
 				Spec: v1.ScalingScheduleSpec{
+					ScalingWindowDurationMinutes: scalingWindowDurationMinutes,
 					Schedules:                    schedules,
 				},
 			},
@@ -650,7 +696,7 @@ func newClusterMockStore(name string, schedules []v1.Schedule) mockStore {
 // The cache.Store returns the v1.ClusterScalingSchedule items as
 // v1.ScalingSchedule when it first lists it. When it's update it
 // asserts it correctly to the v1.ClusterScalingSchedule type.
-func newClusterMockStoreFirstRun(name string, schedules []v1.Schedule) mockStore {
+func newClusterMockStoreFirstRun(name string, scalingWindowDurationMinutes *int64, schedules []v1.Schedule) mockStore {
 	return mockStore{
 		map[string]interface{}{
 			name: &v1.ScalingSchedule{
@@ -658,6 +704,7 @@ func newClusterMockStoreFirstRun(name string, schedules []v1.Schedule) mockStore
 					Name: name,
 				},
 				Spec: v1.ScalingScheduleSpec{
+					ScalingWindowDurationMinutes: scalingWindowDurationMinutes,
 					Schedules:                    schedules,
 				},
 			},

pkg/server/start.go

@@ -128,6 +128,7 @@ func NewCommandStartAdapterServer(stopCh <-chan struct{}) *cobra.Command {
 	flags.DurationVar(&o.GCInterval, "garbage-collector-interval", 10*time.Minute, "Interval to clean up metrics that are stored in in-memory cache.")
 	flags.BoolVar(&o.ScalingScheduleMetrics, "scaling-schedule", o.ScalingScheduleMetrics, ""+
 		"whether to enable time-based ScalingSchedule metrics")
+	flags.DurationVar(&o.DefaultScheduledScalingWindow, "scaling-schedule-default-scaling-window", 10*time.Minute, "Default scale-up/scale-down window duration for scheduled metrics")
 	return cmd
 }
 
@@ -293,7 +294,7 @@ func (o AdapterServerOptions) RunCustomMetricsAdapterServer(stopCh <-chan struct
 		)
 		go reflector.Run(ctx.Done())
 
-		clusterPlugin, err := collector.NewClusterScalingScheduleCollectorPlugin(clusterScalingSchedulesStore, time.Now)
+		clusterPlugin, err := collector.NewClusterScalingScheduleCollectorPlugin(clusterScalingSchedulesStore, time.Now, o.DefaultScheduledScalingWindow)
 		if err != nil {
 			return fmt.Errorf("unable to create ClusterScalingScheduleCollector plugin: %v", err)
 		}
@@ -302,7 +303,7 @@ func (o AdapterServerOptions) RunCustomMetricsAdapterServer(stopCh <-chan struct
 			return fmt.Errorf("failed to register ClusterScalingSchedule object collector plugin: %v", err)
 		}
 
-		plugin, err := collector.NewScalingScheduleCollectorPlugin(scalingSchedulesStore, time.Now)
+		plugin, err := collector.NewScalingScheduleCollectorPlugin(scalingSchedulesStore, time.Now, o.DefaultScheduledScalingWindow)
 		if err != nil {
 			return fmt.Errorf("unable to create ScalingScheduleCollector plugin: %v", err)
 		}
@@ -428,4 +429,6 @@ type AdapterServerOptions struct {
 	GCInterval time.Duration
 	// Time-based scaling based on the CRDs ScheduleScaling and ClusterScheduleScaling.
 	ScalingScheduleMetrics bool
+	// Default scale-up/scale-down window duration for scheduled metrics
+	DefaultScheduledScalingWindow time.Duration
 }