Refactor NodeDeleteOptions for use in drainability rules

cluster-autoscaler/core/autoscaler.go

@@ -31,8 +31,9 @@ import (
 	"k8s.io/autoscaler/cluster-autoscaler/expander"
 	"k8s.io/autoscaler/cluster-autoscaler/expander/factory"
 	ca_processors "k8s.io/autoscaler/cluster-autoscaler/processors"
-	"k8s.io/autoscaler/cluster-autoscaler/simulator"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/clustersnapshot"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability/rules"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/predicatechecker"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/backoff"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/errors"
@@ -57,7 +58,8 @@ type AutoscalerOptions struct {
 	DebuggingSnapshotter   debuggingsnapshot.DebuggingSnapshotter
 	RemainingPdbTracker    pdb.RemainingPdbTracker
 	ScaleUpOrchestrator    scaleup.Orchestrator
-	DeleteOptions          simulator.NodeDeleteOptions
+	DeleteOptions          options.NodeDeleteOptions
+	DrainabilityRules      rules.Rules
 }
 
 // Autoscaler is the main component of CA which scales up/down node groups according to its configuration
@@ -90,7 +92,9 @@ func NewAutoscaler(opts AutoscalerOptions) (Autoscaler, errors.AutoscalerError)
 		opts.DebuggingSnapshotter,
 		opts.RemainingPdbTracker,
 		opts.ScaleUpOrchestrator,
-		opts.DeleteOptions), nil
+		opts.DeleteOptions,
+		opts.DrainabilityRules,
+	), nil
 }
 
 // Initialize default options if not provided.

cluster-autoscaler/core/scaledown/actuation/actuator.go

@@ -35,6 +35,8 @@ import (
 	"k8s.io/autoscaler/cluster-autoscaler/metrics"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/clustersnapshot"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability/rules"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/utilization"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/errors"
 	kube_util "k8s.io/autoscaler/cluster-autoscaler/utils/kubernetes"
@@ -47,7 +49,8 @@ type Actuator struct {
 	clusterState          *clusterstate.ClusterStateRegistry
 	nodeDeletionTracker   *deletiontracker.NodeDeletionTracker
 	nodeDeletionScheduler *GroupDeletionScheduler
-	deleteOptions         simulator.NodeDeleteOptions
+	deleteOptions         options.NodeDeleteOptions
+	drainabilityRules     rules.Rules
 	// TODO: Move budget processor to scaledown planner, potentially merge into PostFilteringScaleDownNodeProcessor
 	// This is a larger change to the code structure which impacts some existing actuator unit tests
 	// as well as Cluster Autoscaler implementations that may override ScaleDownSetProcessor
@@ -64,15 +67,16 @@ type actuatorNodeGroupConfigGetter interface {
 }
 
 // NewActuator returns a new instance of Actuator.
-func NewActuator(ctx *context.AutoscalingContext, csr *clusterstate.ClusterStateRegistry, ndt *deletiontracker.NodeDeletionTracker, deleteOptions simulator.NodeDeleteOptions, configGetter actuatorNodeGroupConfigGetter) *Actuator {
+func NewActuator(ctx *context.AutoscalingContext, csr *clusterstate.ClusterStateRegistry, ndt *deletiontracker.NodeDeletionTracker, deleteOptions options.NodeDeleteOptions, drainabilityRules rules.Rules, configGetter actuatorNodeGroupConfigGetter) *Actuator {
 	ndb := NewNodeDeletionBatcher(ctx, csr, ndt, ctx.NodeDeletionBatcherInterval)
 	return &Actuator{
 		ctx:                       ctx,
 		clusterState:              csr,
 		nodeDeletionTracker:       ndt,
-		nodeDeletionScheduler:     NewGroupDeletionScheduler(ctx, ndt, ndb, NewDefaultEvictor(deleteOptions, ndt)),
+		nodeDeletionScheduler:     NewGroupDeletionScheduler(ctx, ndt, ndb, NewDefaultEvictor(deleteOptions, drainabilityRules, ndt)),
 		budgetProcessor:           budgets.NewScaleDownBudgetProcessor(ctx),
 		deleteOptions:             deleteOptions,
+		drainabilityRules:         drainabilityRules,
 		configGetter:              configGetter,
 		nodeDeleteDelayAfterTaint: ctx.NodeDeleteDelayAfterTaint,
 	}
@@ -273,7 +277,7 @@ func (a *Actuator) deleteNodesAsync(nodes []*apiv1.Node, nodeGroup cloudprovider
 			continue
 		}
 
-		podsToRemove, _, _, err := simulator.GetPodsToMove(nodeInfo, a.deleteOptions, registry, remainingPdbTracker, time.Now())
+		podsToRemove, _, _, err := simulator.GetPodsToMove(nodeInfo, a.deleteOptions, a.drainabilityRules, registry, remainingPdbTracker, time.Now())
 		if err != nil {
 			klog.Errorf("Scale-down: couldn't delete node %q, err: %v", node.Name, err)
 			nodeDeleteResult := status.NodeDeleteResult{ResultType: status.NodeDeleteErrorInternal, Err: errors.NewAutoscalerError(errors.InternalError, "GetPodsToMove for %q returned error: %v", node.Name, err)}

cluster-autoscaler/core/scaledown/actuation/drain.go

@@ -32,6 +32,8 @@ import (
 	"k8s.io/autoscaler/cluster-autoscaler/core/scaledown/status"
 	"k8s.io/autoscaler/cluster-autoscaler/metrics"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability/rules"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/daemonset"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/errors"
 	pod_util "k8s.io/autoscaler/cluster-autoscaler/utils/pod"
@@ -61,11 +63,12 @@ type Evictor struct {
 	DsEvictionEmptyNodeTimeout time.Duration
 	PodEvictionHeadroom        time.Duration
 	evictionRegister           evictionRegister
-	deleteOptions              simulator.NodeDeleteOptions
+	deleteOptions              options.NodeDeleteOptions
+	drainabilityRules          rules.Rules
 }
 
 // NewDefaultEvictor returns an instance of Evictor using the default parameters.
-func NewDefaultEvictor(deleteOptions simulator.NodeDeleteOptions, evictionRegister evictionRegister) Evictor {
+func NewDefaultEvictor(deleteOptions options.NodeDeleteOptions, drainabilityRules rules.Rules, evictionRegister evictionRegister) Evictor {
 	return Evictor{
 		EvictionRetryTime:          DefaultEvictionRetryTime,
 		DsEvictionRetryTime:        DefaultDsEvictionRetryTime,
@@ -73,6 +76,7 @@ func NewDefaultEvictor(deleteOptions simulator.NodeDeleteOptions, evictionRegist
 		PodEvictionHeadroom:        DefaultPodEvictionHeadroom,
 		evictionRegister:           evictionRegister,
 		deleteOptions:              deleteOptions,
+		drainabilityRules:          drainabilityRules,
 	}
 }
 
@@ -176,7 +180,7 @@ func (e Evictor) DrainNodeWithPods(ctx *acontext.AutoscalingContext, node *apiv1
 // EvictDaemonSetPods creates eviction objects for all DaemonSet pods on the node.
 func (e Evictor) EvictDaemonSetPods(ctx *acontext.AutoscalingContext, nodeInfo *framework.NodeInfo, timeNow time.Time) error {
 	nodeToDelete := nodeInfo.Node()
-	_, daemonSetPods, _, err := simulator.GetPodsToMove(nodeInfo, e.deleteOptions, nil, nil, timeNow)
+	_, daemonSetPods, _, err := simulator.GetPodsToMove(nodeInfo, e.deleteOptions, e.drainabilityRules, nil, nil, timeNow)
 	if err != nil {
 		return fmt.Errorf("failed to get DaemonSet pods for %s (error: %v)", nodeToDelete.Name, err)
 	}

cluster-autoscaler/core/scaledown/legacy/legacy.go

@@ -32,6 +32,8 @@ import (
 	"k8s.io/autoscaler/cluster-autoscaler/metrics"
 	"k8s.io/autoscaler/cluster-autoscaler/processors"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability/rules"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/utilization"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/errors"
 
@@ -55,9 +57,9 @@ type ScaleDown struct {
 }
 
 // NewScaleDown builds new ScaleDown object.
-func NewScaleDown(context *context.AutoscalingContext, processors *processors.AutoscalingProcessors, ndt *deletiontracker.NodeDeletionTracker, deleteOptions simulator.NodeDeleteOptions) *ScaleDown {
+func NewScaleDown(context *context.AutoscalingContext, processors *processors.AutoscalingProcessors, ndt *deletiontracker.NodeDeletionTracker, deleteOptions options.NodeDeleteOptions, drainabilityRules rules.Rules) *ScaleDown {
 	usageTracker := simulator.NewUsageTracker()
-	removalSimulator := simulator.NewRemovalSimulator(context.ListerRegistry, context.ClusterSnapshot, context.PredicateChecker, usageTracker, deleteOptions, false)
+	removalSimulator := simulator.NewRemovalSimulator(context.ListerRegistry, context.ClusterSnapshot, context.PredicateChecker, usageTracker, deleteOptions, drainabilityRules, false)
 	unremovableNodes := unremovable.NewNodes()
 	resourceLimitsFinder := resource.NewLimitsFinder(processors.CustomResourcesProcessor)
 	return &ScaleDown{

cluster-autoscaler/core/scaledown/legacy/legacy_test.go

@@ -25,6 +25,7 @@ import (
 	"k8s.io/autoscaler/cluster-autoscaler/processors/nodegroupconfig"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/clustersnapshot"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	autoscaler_errors "k8s.io/autoscaler/cluster-autoscaler/utils/errors"
 
 	appsv1 "k8s.io/api/apps/v1"
@@ -1287,14 +1288,13 @@ func newWrapperForTesting(ctx *context.AutoscalingContext, clusterStateRegistry
 	if ndt == nil {
 		ndt = deletiontracker.NewNodeDeletionTracker(0 * time.Second)
 	}
-	deleteOptions := simulator.NodeDeleteOptions{
+	deleteOptions := options.NodeDeleteOptions{
 		SkipNodesWithSystemPods:           true,
 		SkipNodesWithLocalStorage:         true,
-		MinReplicaCount:                   0,
 		SkipNodesWithCustomControllerPods: true,
 	}
 	processors := NewTestProcessors(ctx)
-	sd := NewScaleDown(ctx, processors, ndt, deleteOptions)
+	sd := NewScaleDown(ctx, processors, ndt, deleteOptions, nil)
-	actuator := actuation.NewActuator(ctx, clusterStateRegistry, ndt, deleteOptions, processors.NodeGroupConfigProcessor)
+	actuator := actuation.NewActuator(ctx, clusterStateRegistry, ndt, deleteOptions, nil, processors.NodeGroupConfigProcessor)
 	return NewScaleDownWrapper(sd, actuator)
 }

cluster-autoscaler/core/scaledown/planner/planner.go

@@ -34,6 +34,8 @@ import (
 	"k8s.io/autoscaler/cluster-autoscaler/processors/nodes"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/clustersnapshot"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability/rules"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/scheduling"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/utilization"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/errors"
@@ -77,7 +79,7 @@ type Planner struct {
 }
 
 // New creates a new Planner object.
-func New(context *context.AutoscalingContext, processors *processors.AutoscalingProcessors, deleteOptions simulator.NodeDeleteOptions) *Planner {
+func New(context *context.AutoscalingContext, processors *processors.AutoscalingProcessors, deleteOptions options.NodeDeleteOptions, drainabilityRules rules.Rules) *Planner {
 	resourceLimitsFinder := resource.NewLimitsFinder(processors.CustomResourcesProcessor)
 	minUpdateInterval := context.AutoscalingOptions.NodeGroupDefaults.ScaleDownUnneededTime
 	if minUpdateInterval == 0*time.Nanosecond {
@@ -87,7 +89,7 @@ func New(context *context.AutoscalingContext, processors *processors.Autoscaling
 		context:               context,
 		unremovableNodes:      unremovable.NewNodes(),
 		unneededNodes:         unneeded.NewNodes(processors.NodeGroupConfigProcessor, resourceLimitsFinder),
-		rs:                    simulator.NewRemovalSimulator(context.ListerRegistry, context.ClusterSnapshot, context.PredicateChecker, simulator.NewUsageTracker(), deleteOptions, true),
+		rs:                    simulator.NewRemovalSimulator(context.ListerRegistry, context.ClusterSnapshot, context.PredicateChecker, simulator.NewUsageTracker(), deleteOptions, drainabilityRules, true),
 		actuationInjector:     scheduling.NewHintingSimulator(context.PredicateChecker),
 		eligibilityChecker:    eligibility.NewChecker(processors.NodeGroupConfigProcessor),
 		nodeUtilizationMap:    make(map[string]utilization.Info),

cluster-autoscaler/core/scaledown/planner/planner_test.go

@@ -37,6 +37,7 @@ import (
 	. "k8s.io/autoscaler/cluster-autoscaler/core/test"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/clustersnapshot"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/utilization"
 	kube_util "k8s.io/autoscaler/cluster-autoscaler/utils/kubernetes"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/taints"
@@ -492,8 +493,8 @@ func TestUpdateClusterState(t *testing.T) {
 			}, &fake.Clientset{}, registry, provider, nil, nil)
 			assert.NoError(t, err)
 			clustersnapshot.InitializeClusterSnapshotOrDie(t, context.ClusterSnapshot, tc.nodes, tc.pods)
-			deleteOptions := simulator.NodeDeleteOptions{}
+			deleteOptions := options.NodeDeleteOptions{}
-			p := New(&context, NewTestProcessors(&context), deleteOptions)
+			p := New(&context, NewTestProcessors(&context), deleteOptions, nil)
 			p.eligibilityChecker = &fakeEligibilityChecker{eligible: asMap(tc.eligible)}
 			if tc.isSimulationTimeout {
 				context.AutoscalingOptions.ScaleDownSimulationTimeout = 1 * time.Second
@@ -611,8 +612,8 @@ func TestUpdateClusterStatUnneededNodesLimit(t *testing.T) {
 			}, &fake.Clientset{}, nil, provider, nil, nil)
 			assert.NoError(t, err)
 			clustersnapshot.InitializeClusterSnapshotOrDie(t, context.ClusterSnapshot, nodes, nil)
-			deleteOptions := simulator.NodeDeleteOptions{}
+			deleteOptions := options.NodeDeleteOptions{}
-			p := New(&context, NewTestProcessors(&context), deleteOptions)
+			p := New(&context, NewTestProcessors(&context), deleteOptions, nil)
 			p.eligibilityChecker = &fakeEligibilityChecker{eligible: asMap(nodeNames(nodes))}
 			p.minUpdateInterval = tc.updateInterval
 			p.unneededNodes.Update(previouslyUnneeded, time.Now())
@@ -779,8 +780,8 @@ func TestNodesToDelete(t *testing.T) {
 			}, &fake.Clientset{}, nil, provider, nil, nil)
 			assert.NoError(t, err)
 			clustersnapshot.InitializeClusterSnapshotOrDie(t, context.ClusterSnapshot, allNodes, nil)
-			deleteOptions := simulator.NodeDeleteOptions{}
+			deleteOptions := options.NodeDeleteOptions{}
-			p := New(&context, NewTestProcessors(&context), deleteOptions)
+			p := New(&context, NewTestProcessors(&context), deleteOptions, nil)
 			p.latestUpdate = time.Now()
 			p.actuationStatus = deletiontracker.NewNodeDeletionTracker(0 * time.Second)
 			p.unneededNodes.Update(allRemovables, time.Now().Add(-1*time.Hour))

cluster-autoscaler/core/static_autoscaler.go

@@ -51,6 +51,8 @@ import (
 	"k8s.io/autoscaler/cluster-autoscaler/processors/status"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/clustersnapshot"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability/rules"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/predicatechecker"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/backoff"
 	caerrors "k8s.io/autoscaler/cluster-autoscaler/utils/errors"
@@ -142,7 +144,8 @@ func NewStaticAutoscaler(
 	debuggingSnapshotter debuggingsnapshot.DebuggingSnapshotter,
 	remainingPdbTracker pdb.RemainingPdbTracker,
 	scaleUpOrchestrator scaleup.Orchestrator,
-	deleteOptions simulator.NodeDeleteOptions) *StaticAutoscaler {
+	deleteOptions options.NodeDeleteOptions,
+	drainabilityRules rules.Rules) *StaticAutoscaler {
 
 	clusterStateConfig := clusterstate.ClusterStateRegistryConfig{
 		MaxTotalUnreadyPercentage: opts.MaxTotalUnreadyPercentage,
@@ -169,14 +172,14 @@ func NewStaticAutoscaler(
 	// TODO: Populate the ScaleDownActuator/Planner fields in AutoscalingContext
 	// during the struct creation rather than here.
 	ndt := deletiontracker.NewNodeDeletionTracker(0 * time.Second)
-	scaleDown := legacy.NewScaleDown(autoscalingContext, processors, ndt, deleteOptions)
+	scaleDown := legacy.NewScaleDown(autoscalingContext, processors, ndt, deleteOptions, drainabilityRules)
-	actuator := actuation.NewActuator(autoscalingContext, clusterStateRegistry, ndt, deleteOptions, processors.NodeGroupConfigProcessor)
+	actuator := actuation.NewActuator(autoscalingContext, clusterStateRegistry, ndt, deleteOptions, drainabilityRules, processors.NodeGroupConfigProcessor)
 	autoscalingContext.ScaleDownActuator = actuator
 
 	var scaleDownPlanner scaledown.Planner
 	var scaleDownActuator scaledown.Actuator
 	if opts.ParallelDrain {
-		scaleDownPlanner = planner.New(autoscalingContext, processors, deleteOptions)
+		scaleDownPlanner = planner.New(autoscalingContext, processors, deleteOptions, drainabilityRules)
 		scaleDownActuator = actuator
 	} else {
 		// TODO: Remove the wrapper once the legacy implementation becomes obsolete.

cluster-autoscaler/core/static_autoscaler_test.go

@@ -45,6 +45,8 @@ import (
 	"k8s.io/autoscaler/cluster-autoscaler/processors/nodegroupconfig"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/clustersnapshot"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability/rules"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/utilization"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/errors"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/kubernetes"
@@ -149,9 +151,9 @@ func (m *onNodeGroupDeleteMock) Delete(id string) error {
 	return args.Error(0)
 }
 
-func setUpScaleDownActuator(ctx *context.AutoscalingContext, options config.AutoscalingOptions) {
+func setUpScaleDownActuator(ctx *context.AutoscalingContext, autoscalingOptions config.AutoscalingOptions) {
-	deleteOptions := simulator.NewNodeDeleteOptions(options)
+	deleteOptions := options.NewNodeDeleteOptions(autoscalingOptions)
-	ctx.ScaleDownActuator = actuation.NewActuator(ctx, nil, deletiontracker.NewNodeDeletionTracker(0*time.Second), deleteOptions, NewTestProcessors(ctx).NodeGroupConfigProcessor)
+	ctx.ScaleDownActuator = actuation.NewActuator(ctx, nil, deletiontracker.NewNodeDeletionTracker(0*time.Second), deleteOptions, rules.Default(), NewTestProcessors(ctx).NodeGroupConfigProcessor)
 }
 
 func TestStaticAutoscalerRunOnce(t *testing.T) {
@@ -1447,11 +1449,11 @@ func TestStaticAutoscalerUpcomingScaleDownCandidates(t *testing.T) {
 		kubernetes.NewTestPodLister(nil),
 		kubernetes.NewTestPodDisruptionBudgetLister(nil), daemonSetLister, nil, nil, nil, nil)
 
-	// Create context with minimal options that guarantee we reach the tested logic.
+	// Create context with minimal autoscalingOptions that guarantee we reach the tested logic.
-	// We're only testing the input to UpdateClusterState which should be called whenever scale-down is enabled, other options shouldn't matter.
+	// We're only testing the input to UpdateClusterState which should be called whenever scale-down is enabled, other autoscalingOptions shouldn't matter.
-	options := config.AutoscalingOptions{ScaleDownEnabled: true}
+	autoscalingOptions := config.AutoscalingOptions{ScaleDownEnabled: true}
 	processorCallbacks := newStaticAutoscalerProcessorCallbacks()
-	ctx, err := NewScaleTestAutoscalingContext(options, &fake.Clientset{}, listerRegistry, provider, processorCallbacks, nil)
+	ctx, err := NewScaleTestAutoscalingContext(autoscalingOptions, &fake.Clientset{}, listerRegistry, provider, processorCallbacks, nil)
 	assert.NoError(t, err)
 
 	// Create CSR with unhealthy cluster protection effectively disabled, to guarantee we reach the tested logic.
@@ -1459,7 +1461,7 @@ func TestStaticAutoscalerUpcomingScaleDownCandidates(t *testing.T) {
 	csr := clusterstate.NewClusterStateRegistry(provider, csrConfig, ctx.LogRecorder, NewBackoff(), nodegroupconfig.NewDefaultNodeGroupConfigProcessor(config.NodeGroupAutoscalingOptions{MaxNodeProvisionTime: 15 * time.Minute}))
 
 	// Setting the Actuator is necessary for testing any scale-down logic, it shouldn't have anything to do in this test.
-	actuator := actuation.NewActuator(&ctx, csr, deletiontracker.NewNodeDeletionTracker(0*time.Second), simulator.NodeDeleteOptions{}, NewTestProcessors(&ctx).NodeGroupConfigProcessor)
+	actuator := actuation.NewActuator(&ctx, csr, deletiontracker.NewNodeDeletionTracker(0*time.Second), options.NodeDeleteOptions{}, nil, NewTestProcessors(&ctx).NodeGroupConfigProcessor)
 	ctx.ScaleDownActuator = actuator
 
 	// Fake planner that keeps track of the scale-down candidates passed to UpdateClusterState.
@@ -1847,15 +1849,14 @@ func newScaleDownPlannerAndActuator(t *testing.T, ctx *context.AutoscalingContex
 	ctx.MaxDrainParallelism = 1
 	ctx.NodeDeletionBatcherInterval = 0 * time.Second
 	ctx.NodeDeleteDelayAfterTaint = 1 * time.Second
-	deleteOptions := simulator.NodeDeleteOptions{
+	deleteOptions := options.NodeDeleteOptions{
 		SkipNodesWithSystemPods:           true,
 		SkipNodesWithLocalStorage:         true,
-		MinReplicaCount:                   0,
 		SkipNodesWithCustomControllerPods: true,
 	}
 	ndt := deletiontracker.NewNodeDeletionTracker(0 * time.Second)
-	sd := legacy.NewScaleDown(ctx, p, ndt, deleteOptions)
+	sd := legacy.NewScaleDown(ctx, p, ndt, deleteOptions, nil)
-	actuator := actuation.NewActuator(ctx, cs, ndt, deleteOptions, p.NodeGroupConfigProcessor)
+	actuator := actuation.NewActuator(ctx, cs, ndt, deleteOptions, nil, p.NodeGroupConfigProcessor)
 	wrapper := legacy.NewScaleDownWrapper(sd, actuator)
 	return wrapper, wrapper
 }

cluster-autoscaler/main.go

@@ -29,10 +29,6 @@ import (
 	"syscall"
 	"time"
 
-	"k8s.io/autoscaler/cluster-autoscaler/debuggingsnapshot"
-	"k8s.io/autoscaler/cluster-autoscaler/simulator"
-	"k8s.io/autoscaler/cluster-autoscaler/simulator/predicatechecker"
-
 	"github.com/spf13/pflag"
 
 	"k8s.io/apimachinery/pkg/api/meta"
@@ -45,6 +41,7 @@ import (
 	"k8s.io/autoscaler/cluster-autoscaler/config"
 	"k8s.io/autoscaler/cluster-autoscaler/core"
 	"k8s.io/autoscaler/cluster-autoscaler/core/podlistprocessor"
+	"k8s.io/autoscaler/cluster-autoscaler/debuggingsnapshot"
 	"k8s.io/autoscaler/cluster-autoscaler/estimator"
 	"k8s.io/autoscaler/cluster-autoscaler/expander"
 	"k8s.io/autoscaler/cluster-autoscaler/metrics"
@@ -55,6 +52,9 @@ import (
 	"k8s.io/autoscaler/cluster-autoscaler/processors/scaledowncandidates/emptycandidates"
 	"k8s.io/autoscaler/cluster-autoscaler/processors/scaledowncandidates/previouscandidates"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/clustersnapshot"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability/rules"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/predicatechecker"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/errors"
 	kube_util "k8s.io/autoscaler/cluster-autoscaler/utils/kubernetes"
 	scheduler_util "k8s.io/autoscaler/cluster-autoscaler/utils/scheduler"
@@ -68,7 +68,7 @@ import (
 	"k8s.io/client-go/tools/leaderelection/resourcelock"
 	kube_flag "k8s.io/component-base/cli/flag"
 	componentbaseconfig "k8s.io/component-base/config"
-	"k8s.io/component-base/config/options"
+	componentopts "k8s.io/component-base/config/options"
 	"k8s.io/component-base/logs"
 	logsapi "k8s.io/component-base/logs/api/v1"
 	_ "k8s.io/component-base/logs/json/register"
@@ -461,7 +461,7 @@ func buildAutoscaler(debuggingSnapshotter debuggingsnapshot.DebuggingSnapshotter
 	if err != nil {
 		return nil, err
 	}
-	deleteOptions := simulator.NewNodeDeleteOptions(autoscalingOptions)
+	deleteOptions := options.NewNodeDeleteOptions(autoscalingOptions)
 
 	opts := core.AutoscalerOptions{
 		AutoscalingOptions:   autoscalingOptions,
@@ -481,7 +481,7 @@ func buildAutoscaler(debuggingSnapshotter debuggingsnapshot.DebuggingSnapshotter
 	if autoscalingOptions.ParallelDrain {
 		sdCandidatesSorting := previouscandidates.NewPreviousCandidates()
 		scaleDownCandidatesComparers = []scaledowncandidates.CandidatesComparer{
-			emptycandidates.NewEmptySortingProcessor(emptycandidates.NewNodeInfoGetter(opts.ClusterSnapshot), deleteOptions),
+			emptycandidates.NewEmptySortingProcessor(emptycandidates.NewNodeInfoGetter(opts.ClusterSnapshot), deleteOptions, rules.Default()),
 			sdCandidatesSorting,
 		}
 		opts.Processors.ScaleDownCandidatesNotifier.Register(sdCandidatesSorting)
@@ -575,7 +575,7 @@ func main() {
 
 	leaderElection := defaultLeaderElectionConfiguration()
 	leaderElection.LeaderElect = true
-	options.BindLeaderElectionFlags(&leaderElection, pflag.CommandLine)
+	componentopts.BindLeaderElectionFlags(&leaderElection, pflag.CommandLine)
 
 	featureGate := utilfeature.DefaultMutableFeatureGate
 	loggingConfig := logsapi.NewLoggingConfiguration()

cluster-autoscaler/processors/scaledowncandidates/emptycandidates/empty_candidates_sorting.go

@@ -22,6 +22,8 @@ import (
 	apiv1 "k8s.io/api/core/v1"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/clustersnapshot"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability/rules"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	schedulerframework "k8s.io/kubernetes/pkg/scheduler/framework"
 )
 
@@ -45,12 +47,17 @@ func NewNodeInfoGetter(c clustersnapshot.ClusterSnapshot) *nodeInfoGetterImpl {
 // EmptySorting is sorting scale down candidates so that empty nodes appear first.
 type EmptySorting struct {
 	nodeInfoGetter
-	deleteOptions simulator.NodeDeleteOptions
+	deleteOptions     options.NodeDeleteOptions
+	drainabilityRules rules.Rules
 }
 
 // NewEmptySortingProcessor return EmptySorting struct.
-func NewEmptySortingProcessor(n nodeInfoGetter, deleteOptions simulator.NodeDeleteOptions) *EmptySorting {
+func NewEmptySortingProcessor(n nodeInfoGetter, deleteOptions options.NodeDeleteOptions, drainabilityRules rules.Rules) *EmptySorting {
-	return &EmptySorting{n, deleteOptions}
+	return &EmptySorting{
+		nodeInfoGetter:    n,
+		deleteOptions:     deleteOptions,
+		drainabilityRules: drainabilityRules,
+	}
 }
 
 // ScaleDownEarlierThan return true if node1 is empty and node2 isn't.
@@ -66,7 +73,7 @@ func (p *EmptySorting) isNodeEmpty(node *apiv1.Node) bool {
 	if err != nil {
 		return false
 	}
-	podsToRemove, _, _, err := simulator.GetPodsToMove(nodeInfo, p.deleteOptions, nil, nil, time.Now())
+	podsToRemove, _, _, err := simulator.GetPodsToMove(nodeInfo, p.deleteOptions, p.drainabilityRules, nil, nil, time.Now())
 	if err == nil && len(podsToRemove) == 0 {
 		return true
 	}

cluster-autoscaler/processors/scaledowncandidates/emptycandidates/empty_candidates_sorting_test.go

@@ -21,7 +21,7 @@ import (
 	"testing"
 
 	v1 "k8s.io/api/core/v1"
-	"k8s.io/autoscaler/cluster-autoscaler/simulator"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	. "k8s.io/autoscaler/cluster-autoscaler/utils/test"
 	schedulerframework "k8s.io/kubernetes/pkg/scheduler/framework"
 )
@@ -62,13 +62,15 @@ func TestScaleDownEarlierThan(t *testing.T) {
 
 	niGetter := testNodeInfoGetter{map[string]*schedulerframework.NodeInfo{nodeEmptyName: niEmpty, nodeNonEmptyName: niNonEmpty, nodeEmptyName2: niEmpty2}}
 
-	deleteOptions := simulator.NodeDeleteOptions{
+	deleteOptions := options.NodeDeleteOptions{
 		SkipNodesWithSystemPods:           true,
 		SkipNodesWithLocalStorage:         true,
-		MinReplicaCount:                   0,
 		SkipNodesWithCustomControllerPods: true,
 	}
-	p := EmptySorting{&niGetter, deleteOptions}
+	p := EmptySorting{
+		nodeInfoGetter: &niGetter,
+		deleteOptions:  deleteOptions,
+	}
 
 	tests := []struct {
 		name        string
@@ -95,22 +97,19 @@ func TestScaleDownEarlierThan(t *testing.T) {
 			wantEarlier: true,
 		},
 		{
-			name:        "Non-empty node is not earlier that node without nodeInfo",
+			name:  "Non-empty node is not earlier that node without nodeInfo",
-			node1:       nodeNonEmpty,
+			node1: nodeNonEmpty,
-			node2:       noNodeInfoNode,
+			node2: noNodeInfoNode,
-			wantEarlier: false,
 		},
 		{
-			name:        "Node without nodeInfo is not earlier that non-empty node",
+			name:  "Node without nodeInfo is not earlier that non-empty node",
-			node1:       noNodeInfoNode,
+			node1: noNodeInfoNode,
-			node2:       nodeNonEmpty,
+			node2: nodeNonEmpty,
-			wantEarlier: false,
 		},
 		{
-			name:        "Empty node is not earlier that another empty node",
+			name:  "Empty node is not earlier that another empty node",
-			node1:       nodeEmpty,
+			node1: nodeEmpty,
-			node2:       nodeEmpty2,
+			node2: nodeEmpty2,
-			wantEarlier: false,
 		},
 	}
 	for _, test := range tests {

cluster-autoscaler/simulator/cluster.go

@@ -22,6 +22,8 @@ import (
 
 	"k8s.io/autoscaler/cluster-autoscaler/core/scaledown/pdb"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/clustersnapshot"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability/rules"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/predicatechecker"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/scheduling"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/drain"
@@ -95,19 +97,21 @@ type RemovalSimulator struct {
 	clusterSnapshot     clustersnapshot.ClusterSnapshot
 	usageTracker        *UsageTracker
 	canPersist          bool
-	deleteOptions       NodeDeleteOptions
+	deleteOptions       options.NodeDeleteOptions
+	drainabilityRules   rules.Rules
 	schedulingSimulator *scheduling.HintingSimulator
 }
 
 // NewRemovalSimulator returns a new RemovalSimulator.
 func NewRemovalSimulator(listers kube_util.ListerRegistry, clusterSnapshot clustersnapshot.ClusterSnapshot, predicateChecker predicatechecker.PredicateChecker,
-	usageTracker *UsageTracker, deleteOptions NodeDeleteOptions, persistSuccessfulSimulations bool) *RemovalSimulator {
+	usageTracker *UsageTracker, deleteOptions options.NodeDeleteOptions, drainabilityRules rules.Rules, persistSuccessfulSimulations bool) *RemovalSimulator {
 	return &RemovalSimulator{
 		listers:             listers,
 		clusterSnapshot:     clusterSnapshot,
 		usageTracker:        usageTracker,
 		canPersist:          persistSuccessfulSimulations,
 		deleteOptions:       deleteOptions,
+		drainabilityRules:   drainabilityRules,
 		schedulingSimulator: scheduling.NewHintingSimulator(predicateChecker),
 	}
 }
@@ -159,7 +163,7 @@ func (r *RemovalSimulator) SimulateNodeRemoval(
 		return nil, &UnremovableNode{Node: nodeInfo.Node(), Reason: UnexpectedError}
 	}
 
-	podsToRemove, daemonSetPods, blockingPod, err := GetPodsToMove(nodeInfo, r.deleteOptions, r.listers, remainingPdbTracker, timestamp)
+	podsToRemove, daemonSetPods, blockingPod, err := GetPodsToMove(nodeInfo, r.deleteOptions, r.drainabilityRules, r.listers, remainingPdbTracker, timestamp)
 	if err != nil {
 		klog.V(2).Infof("node %s cannot be removed: %v", nodeName, err)
 		if blockingPod != nil {
@@ -193,7 +197,7 @@ func (r *RemovalSimulator) FindEmptyNodesToRemove(candidates []string, timestamp
 			continue
 		}
 		// Should block on all pods
-		podsToRemove, _, _, err := GetPodsToMove(nodeInfo, r.deleteOptions, nil, nil, timestamp)
+		podsToRemove, _, _, err := GetPodsToMove(nodeInfo, r.deleteOptions, r.drainabilityRules, nil, nil, timestamp)
 		if err == nil && len(podsToRemove) == 0 {
 			result = append(result, node)
 		}

cluster-autoscaler/simulator/cluster_test.go

@@ -22,6 +22,7 @@ import (
 	"time"
 
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/clustersnapshot"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/predicatechecker"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/drain"
 	kube_util "k8s.io/autoscaler/cluster-autoscaler/utils/kubernetes"
@@ -58,7 +59,7 @@ func TestFindEmptyNodes(t *testing.T) {
 	clusterSnapshot := clustersnapshot.NewBasicClusterSnapshot()
 	clustersnapshot.InitializeClusterSnapshotOrDie(t, clusterSnapshot, []*apiv1.Node{nodes[0], nodes[1], nodes[2], nodes[3]}, []*apiv1.Pod{pod1, pod2})
 	testTime := time.Date(2020, time.December, 18, 17, 0, 0, 0, time.UTC)
-	r := NewRemovalSimulator(nil, clusterSnapshot, nil, nil, testDeleteOptions(), false)
+	r := NewRemovalSimulator(nil, clusterSnapshot, nil, nil, testDeleteOptions(), nil, false)
 	emptyNodes := r.FindEmptyNodesToRemove(nodeNames, testTime)
 	assert.Equal(t, []string{nodeNames[0], nodeNames[2], nodeNames[3]}, emptyNodes)
 }
@@ -205,7 +206,7 @@ func TestFindNodesToRemove(t *testing.T) {
 				destinations = append(destinations, node.Name)
 			}
 			clustersnapshot.InitializeClusterSnapshotOrDie(t, clusterSnapshot, test.allNodes, test.pods)
-			r := NewRemovalSimulator(registry, clusterSnapshot, predicateChecker, tracker, testDeleteOptions(), false)
+			r := NewRemovalSimulator(registry, clusterSnapshot, predicateChecker, tracker, testDeleteOptions(), nil, false)
 			toRemove, unremovable := r.FindNodesToRemove(test.candidates, destinations, time.Now(), nil)
 			fmt.Printf("Test scenario: %s, found len(toRemove)=%v, expected len(test.toRemove)=%v\n", test.name, len(toRemove), len(test.toRemove))
 			assert.Equal(t, toRemove, test.toRemove)
@@ -214,11 +215,10 @@ func TestFindNodesToRemove(t *testing.T) {
 	}
 }
 
-func testDeleteOptions() NodeDeleteOptions {
+func testDeleteOptions() options.NodeDeleteOptions {
-	return NodeDeleteOptions{
+	return options.NodeDeleteOptions{
 		SkipNodesWithSystemPods:           true,
 		SkipNodesWithLocalStorage:         true,
-		MinReplicaCount:                   0,
 		SkipNodesWithCustomControllerPods: true,
 	}
 }

cluster-autoscaler/simulator/drain.go

@@ -24,42 +24,16 @@ import (
 	policyv1 "k8s.io/api/policy/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/labels"
-	"k8s.io/autoscaler/cluster-autoscaler/config"
 	"k8s.io/autoscaler/cluster-autoscaler/core/scaledown/pdb"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability/rules"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/drain"
 	kube_util "k8s.io/autoscaler/cluster-autoscaler/utils/kubernetes"
 	pod_util "k8s.io/autoscaler/cluster-autoscaler/utils/pod"
 	schedulerframework "k8s.io/kubernetes/pkg/scheduler/framework"
 )
 
-// NodeDeleteOptions contains various options to customize how draining will behave
-type NodeDeleteOptions struct {
-	// SkipNodesWithSystemPods tells if nodes with pods from kube-system should be deleted (except for DaemonSet or mirror pods)
-	SkipNodesWithSystemPods bool
-	// SkipNodesWithLocalStorage tells if nodes with pods with local storage, e.g. EmptyDir or HostPath, should be deleted
-	SkipNodesWithLocalStorage bool
-	// SkipNodesWithCustomControllerPods tells if nodes with custom-controller owned pods should be skipped from deletion (skip if 'true')
-	SkipNodesWithCustomControllerPods bool
-	// MinReplicaCount controls the minimum number of replicas that a replica set or replication controller should have
-	// to allow their pods deletion in scale down
-	MinReplicaCount int
-	// DrainabilityRules contain a list of checks that are used to verify whether a pod can be drained from node.
-	DrainabilityRules rules.Rules
-}
-
-// NewNodeDeleteOptions returns new node delete options extracted from autoscaling options
-func NewNodeDeleteOptions(opts config.AutoscalingOptions) NodeDeleteOptions {
-	return NodeDeleteOptions{
-		SkipNodesWithSystemPods:           opts.SkipNodesWithSystemPods,
-		SkipNodesWithLocalStorage:         opts.SkipNodesWithLocalStorage,
-		MinReplicaCount:                   opts.MinReplicaCount,
-		SkipNodesWithCustomControllerPods: opts.SkipNodesWithCustomControllerPods,
-		DrainabilityRules:                 rules.Default(),
-	}
-}
-
 // GetPodsToMove returns a list of pods that should be moved elsewhere
 // and a list of DaemonSet pods that should be evicted if the node
 // is drained. Raises error if there is an unreplicated pod.
@@ -68,10 +42,8 @@ func NewNodeDeleteOptions(opts config.AutoscalingOptions) NodeDeleteOptions {
 // If listers is not nil it checks whether RC, DS, Jobs and RS that created these pods
 // still exist.
 // TODO(x13n): Rewrite GetPodsForDeletionOnNodeDrain into a set of DrainabilityRules.
-func GetPodsToMove(nodeInfo *schedulerframework.NodeInfo, deleteOptions NodeDeleteOptions, listers kube_util.ListerRegistry,
+func GetPodsToMove(nodeInfo *schedulerframework.NodeInfo, deleteOptions options.NodeDeleteOptions, drainabilityRules rules.Rules, listers kube_util.ListerRegistry, remainingPdbTracker pdb.RemainingPdbTracker, timestamp time.Time) (pods []*apiv1.Pod, daemonSetPods []*apiv1.Pod, blockingPod *drain.BlockingPod, err error) {
-	remainingPdbTracker pdb.RemainingPdbTracker, timestamp time.Time) (pods []*apiv1.Pod, daemonSetPods []*apiv1.Pod, blockingPod *drain.BlockingPod, err error) {
 	var drainPods, drainDs []*apiv1.Pod
-	drainabilityRules := deleteOptions.DrainabilityRules
 	if drainabilityRules == nil {
 		drainabilityRules = rules.Default()
 	}
@@ -80,6 +52,7 @@ func GetPodsToMove(nodeInfo *schedulerframework.NodeInfo, deleteOptions NodeDele
 	}
 	drainCtx := &drainability.DrainContext{
 		RemainingPdbTracker: remainingPdbTracker,
+		DeleteOptions:       deleteOptions,
 	}
 	for _, podInfo := range nodeInfo.Pods {
 		pod := podInfo.Pod

cluster-autoscaler/simulator/drain_test.go

@@ -28,6 +28,7 @@ import (
 	"k8s.io/autoscaler/cluster-autoscaler/core/scaledown/pdb"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability"
 	"k8s.io/autoscaler/cluster-autoscaler/simulator/drainability/rules"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/drain"
 	. "k8s.io/autoscaler/cluster-autoscaler/utils/test"
 	"k8s.io/kubernetes/pkg/kubelet/types"
@@ -306,16 +307,14 @@ func TestGetPodsToMove(t *testing.T) {
 	}
 	for _, tc := range testCases {
 		t.Run(tc.desc, func(t *testing.T) {
-			deleteOptions := NodeDeleteOptions{
+			deleteOptions := options.NodeDeleteOptions{
 				SkipNodesWithSystemPods:           true,
 				SkipNodesWithLocalStorage:         true,
-				MinReplicaCount:                   0,
 				SkipNodesWithCustomControllerPods: true,
-				DrainabilityRules:                 tc.rules,
 			}
 			tracker := pdb.NewBasicRemainingPdbTracker()
 			tracker.SetPdbs(tc.pdbs)
-			p, d, b, err := GetPodsToMove(schedulerframework.NewNodeInfo(tc.pods...), deleteOptions, nil, tracker, testTime)
+			p, d, b, err := GetPodsToMove(schedulerframework.NewNodeInfo(tc.pods...), deleteOptions, tc.rules, nil, tracker, testTime)
 			if tc.wantErr {
 				assert.Error(t, err)
 			} else {

cluster-autoscaler/simulator/drainability/context.go

@@ -18,9 +18,11 @@ package drainability
 
 import (
 	"k8s.io/autoscaler/cluster-autoscaler/core/scaledown/pdb"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator/options"
 )
 
 // DrainContext contains parameters for drainability rules.
 type DrainContext struct {
 	RemainingPdbTracker pdb.RemainingPdbTracker
+	DeleteOptions       options.NodeDeleteOptions
 }

cluster-autoscaler/simulator/options/nodedelete.go

@@ -0,0 +1,48 @@
+/*
+Copyright 2023 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package options
+
+import (
+	"k8s.io/autoscaler/cluster-autoscaler/config"
+)
+
+// NodeDeleteOptions contains various options to customize how draining will behave
+type NodeDeleteOptions struct {
+	// SkipNodesWithSystemPods is true if nodes with kube-system pods should be
+	// deleted (except for DaemonSet or mirror pods).
+	SkipNodesWithSystemPods bool
+	// SkipNodesWithLocalStorage is true if nodes with pods using local storage
+	// (e.g. EmptyDir or HostPath) should be deleted.
+	SkipNodesWithLocalStorage bool
+	// SkipNodesWithCustomControllerPods is true if nodes with
+	// custom-controller-owned pods should be skipped.
+	SkipNodesWithCustomControllerPods bool
+	// MinReplicaCount determines the minimum number of replicas that a replica
+	// set or replication controller should have to allow pod deletion during
+	// scale down.
+	MinReplicaCount int
+}
+
+// NewNodeDeleteOptions returns new node delete options extracted from autoscaling options.
+func NewNodeDeleteOptions(opts config.AutoscalingOptions) NodeDeleteOptions {
+	return NodeDeleteOptions{
+		SkipNodesWithSystemPods:           opts.SkipNodesWithSystemPods,
+		SkipNodesWithLocalStorage:         opts.SkipNodesWithLocalStorage,
+		MinReplicaCount:                   opts.MinReplicaCount,
+		SkipNodesWithCustomControllerPods: opts.SkipNodesWithCustomControllerPods,
+	}
+}