feat: several cleanups in the scheduling package

pkg/scheduler/algorithm/predicates/metadata_test.go

@@ -39,7 +39,7 @@ func (s sortablePods) Less(i, j int) bool {
 func (s sortablePods) Len() int      { return len(s) }
 func (s sortablePods) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
 
-var _ = sort.Interface(&sortablePods{})
+var _ sort.Interface = &sortablePods{}
 
 // sortableServices allows us to sort services.
 type sortableServices []*v1.Service
@@ -51,7 +51,7 @@ func (s sortableServices) Less(i, j int) bool {
 func (s sortableServices) Len() int      { return len(s) }
 func (s sortableServices) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
 
-var _ = sort.Interface(&sortableServices{})
+var _ sort.Interface = &sortableServices{}
 
 // predicateMetadataEquivalent returns true if the two metadata are equivalent.
 // Note: this function does not compare podRequest.

pkg/scheduler/framework/plugins/examples/multipoint/multipoint.go

@@ -28,8 +28,8 @@ import (
 // extension points. It communicates through state with another function.
 type CommunicatingPlugin struct{}
 
-var _ = framework.ReservePlugin(CommunicatingPlugin{})
-var _ = framework.PreBindPlugin(CommunicatingPlugin{})
+var _ framework.ReservePlugin = CommunicatingPlugin{}
+var _ framework.PreBindPlugin = CommunicatingPlugin{}
 
 // Name is the name of the plug used in Registry and configurations.
 const Name = "multipoint-communicating-plugin"

pkg/scheduler/framework/plugins/examples/prebind/prebind.go

@@ -29,7 +29,7 @@ import (
 // and implements only one hook for prebind.
 type StatelessPreBindExample struct{}
 
-var _ = framework.PreBindPlugin(StatelessPreBindExample{})
+var _ framework.PreBindPlugin = StatelessPreBindExample{}
 
 // Name is the name of the plugin used in Registry and configurations.
 const Name = "stateless-prebind-plugin-example"

pkg/scheduler/framework/plugins/examples/stateful/stateful.go

@@ -36,8 +36,8 @@ type MultipointExample struct {
 	mu      sync.RWMutex
 }
 
-var _ = framework.ReservePlugin(&MultipointExample{})
-var _ = framework.PreBindPlugin(&MultipointExample{})
+var _ framework.ReservePlugin = &MultipointExample{}
+var _ framework.PreBindPlugin = &MultipointExample{}
 
 // Name is the name of the plug used in Registry and configurations.
 const Name = "multipoint-plugin-example"

pkg/scheduler/framework/plugins/imagelocality/image_locality.go

@@ -29,12 +29,12 @@ import (
 
 var mb int64 = 1024 * 1024
 
-// ImageLocality is a plugin that checks if a pod tolerates a node's taints.
+// ImageLocality is a score plugin that favors nodes that already have requested pod container's images.
 type ImageLocality struct {
 	handle framework.FrameworkHandle
 }
 
-var _ = framework.ScorePlugin(&ImageLocality{})
+var _ framework.ScorePlugin = &ImageLocality{}
 
 // Name is the name of the plugin used in the plugin registry and configurations.
 const Name = "ImageLocality"

pkg/scheduler/framework/plugins/nodename/node_name.go

@@ -30,7 +30,7 @@ import (
 // NodeName is a plugin that checks if a pod spec node name matches the current node.
 type NodeName struct{}
 
-var _ = framework.FilterPlugin(&NodeName{})
+var _ framework.FilterPlugin = &NodeName{}
 
 // Name is the name of the plugin used in the plugin registry and configurations.
 const Name = "NodeName"

pkg/scheduler/framework/plugins/nodename/node_name_test.go

@@ -32,14 +32,12 @@ func TestNodeName(t *testing.T) {
 	tests := []struct {
 		pod        *v1.Pod
 		node       *v1.Node
-		fits       bool
 		name       string
 		wantStatus *framework.Status
 	}{
 		{
 			pod:  &v1.Pod{},
 			node: &v1.Node{},
-			fits: true,
 			name: "no host specified",
 		},
 		{
@@ -53,7 +51,6 @@ func TestNodeName(t *testing.T) {
 					Name: "foo",
 				},
 			},
-			fits: true,
 			name: "host matches",
 		},
 		{
@@ -67,7 +64,6 @@ func TestNodeName(t *testing.T) {
 					Name: "foo",
 				},
 			},
-			fits:       false,
 			name:       "host doesn't match",
 			wantStatus: framework.NewStatus(framework.UnschedulableAndUnresolvable, predicates.ErrPodNotMatchHostName.GetReason()),
 		},

pkg/scheduler/framework/plugins/nodeports/node_ports.go

@@ -30,7 +30,7 @@ import (
 // NodePorts is a plugin that checks if a node has free ports for the requested pod ports.
 type NodePorts struct{}
 
-var _ = framework.FilterPlugin(&NodePorts{})
+var _ framework.FilterPlugin = &NodePorts{}
 
 // Name is the name of the plugin used in the plugin registry and configurations.
 const Name = "NodePorts"

pkg/scheduler/framework/plugins/noderesources/node_resources.go

@@ -31,7 +31,7 @@ import (
 // NodeResources is a plugin that checks if a node has sufficient resources.
 type NodeResources struct{}
 
-var _ = framework.FilterPlugin(&NodeResources{})
+var _ framework.FilterPlugin = &NodeResources{}
 
 // Name is the name of the plugin used in the plugin registry and configurations.
 const Name = "NodeResources"

pkg/scheduler/framework/plugins/nodevolumelimits/node_volume_limits.go

@@ -19,7 +19,7 @@ package nodevolumelimits
 import (
 	"context"
 
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	"k8s.io/kubernetes/pkg/scheduler/algorithm/predicates"
 	"k8s.io/kubernetes/pkg/scheduler/framework/plugins/migration"
 	framework "k8s.io/kubernetes/pkg/scheduler/framework/v1alpha1"
@@ -31,7 +31,7 @@ type NodeVolumeLimits struct {
 	predicate predicates.FitPredicate
 }
 
-var _ = framework.FilterPlugin(&NodeVolumeLimits{})
+var _ framework.FilterPlugin = &NodeVolumeLimits{}
 
 // Name is the name of the plugin used in the plugin registry and configurations.
 const Name = "NodeVolumeLimits"

pkg/scheduler/framework/plugins/tainttoleration/taint_toleration.go

@@ -34,8 +34,8 @@ type TaintToleration struct {
 	handle framework.FrameworkHandle
 }
 
-var _ = framework.FilterPlugin(&TaintToleration{})
-var _ = framework.ScorePlugin(&TaintToleration{})
+var _ framework.FilterPlugin = &TaintToleration{}
+var _ framework.ScorePlugin = &TaintToleration{}
 
 // Name is the name of the plugin used in the plugin registry and configurations.
 const Name = "TaintToleration"

pkg/scheduler/framework/plugins/volumerestrictions/volume_restrictions.go

@@ -27,10 +27,10 @@ import (
 	"k8s.io/kubernetes/pkg/scheduler/nodeinfo"
 )
 
-// VolumeRestrictions is a plugin that checks volume restrictions
+// VolumeRestrictions is a plugin that checks volume restrictions.
 type VolumeRestrictions struct{}
 
-var _ = framework.FilterPlugin(&VolumeRestrictions{})
+var _ framework.FilterPlugin = &VolumeRestrictions{}
 
 // Name is the name of the plugin used in the plugin registry and configurations.
 const Name = "VolumeRestrictions"

pkg/scheduler/framework/plugins/volumezone/volume_zone.go

@@ -26,12 +26,12 @@ import (
 	"k8s.io/kubernetes/pkg/scheduler/nodeinfo"
 )
 
-// VolumeZone is a plugin that checks volume zone
+// VolumeZone is a plugin that checks volume zone.
 type VolumeZone struct {
 	predicate predicates.FitPredicate
 }
 
-var _ = framework.FilterPlugin(&VolumeZone{})
+var _ framework.FilterPlugin = &VolumeZone{}
 
 // Name is the name of the plugin used in the plugin registry and configurations.
 const Name = "VolumeZone"

pkg/scheduler/framework/v1alpha1/framework.go

@@ -127,7 +127,7 @@ func WithInformerFactory(informerFactory informers.SharedInformerFactory) Option
 
 var defaultFrameworkOptions = frameworkOptions{}
 
-var _ = Framework(&framework{})
+var _ Framework = &framework{}
 
 // NewFramework initializes plugins given the configuration and the registry.
 func NewFramework(r Registry, plugins *config.Plugins, args []config.PluginConfig, opts ...Option) (Framework, error) {

pkg/scheduler/framework/v1alpha1/framework_test.go

@@ -47,8 +47,8 @@ const (
 
 // TestScoreWithNormalizePlugin implements ScoreWithNormalizePlugin interface.
 // TestScorePlugin only implements ScorePlugin interface.
-var _ = ScorePlugin(&TestScoreWithNormalizePlugin{})
-var _ = ScorePlugin(&TestScorePlugin{})
+var _ ScorePlugin = &TestScoreWithNormalizePlugin{}
+var _ ScorePlugin = &TestScorePlugin{}
 
 func newScoreWithNormalizePlugin1(injArgs *runtime.Unknown, f FrameworkHandle) (Plugin, error) {
 	var inj injectedResult

pkg/scheduler/internal/queue/scheduling_queue.go

@@ -187,7 +187,7 @@ var defaultPriorityQueueOptions = priorityQueueOptions{
 }
 
 // Making sure that PriorityQueue implements SchedulingQueue.
-var _ = SchedulingQueue(&PriorityQueue{})
+var _ SchedulingQueue = &PriorityQueue{}
 
 // newPodInfoNoTimestamp builds a PodInfo object without timestamp.
 func newPodInfoNoTimestamp(pod *v1.Pod) *framework.PodInfo {

test/integration/scheduler/framework_test.go

@@ -116,18 +116,18 @@ const (
 	permitPluginName             = "permit-plugin"
 )
 
-var _ = framework.PreFilterPlugin(&PreFilterPlugin{})
-var _ = framework.ScorePlugin(&ScorePlugin{})
-var _ = framework.FilterPlugin(&FilterPlugin{})
-var _ = framework.ScorePlugin(&ScorePlugin{})
-var _ = framework.ScorePlugin(&ScoreWithNormalizePlugin{})
-var _ = framework.ReservePlugin(&ReservePlugin{})
-var _ = framework.PostFilterPlugin(&PostFilterPlugin{})
-var _ = framework.PreBindPlugin(&PreBindPlugin{})
-var _ = framework.BindPlugin(&BindPlugin{})
-var _ = framework.PostBindPlugin(&PostBindPlugin{})
-var _ = framework.UnreservePlugin(&UnreservePlugin{})
-var _ = framework.PermitPlugin(&PermitPlugin{})
+var _ framework.PreFilterPlugin = &PreFilterPlugin{}
+var _ framework.ScorePlugin = &ScorePlugin{}
+var _ framework.FilterPlugin = &FilterPlugin{}
+var _ framework.ScorePlugin = &ScorePlugin{}
+var _ framework.ScorePlugin = &ScoreWithNormalizePlugin{}
+var _ framework.ReservePlugin = &ReservePlugin{}
+var _ framework.PostFilterPlugin = &PostFilterPlugin{}
+var _ framework.PreBindPlugin = &PreBindPlugin{}
+var _ framework.BindPlugin = &BindPlugin{}
+var _ framework.PostBindPlugin = &PostBindPlugin{}
+var _ framework.UnreservePlugin = &UnreservePlugin{}
+var _ framework.PermitPlugin = &PermitPlugin{}
 
 // newPlugin returns a plugin factory with specified Plugin.
 func newPlugin(plugin framework.Plugin) framework.PluginFactory {

test/integration/scheduler/preemption_test.go

@@ -118,7 +118,7 @@ func (fp *tokenFilter) PreFilterExtensions() framework.PreFilterExtensions {
 	return fp
 }
 
-var _ = framework.FilterPlugin(&tokenFilter{})
+var _ framework.FilterPlugin = &tokenFilter{}
 
 // TestPreemption tests a few preemption scenarios.
 func TestPreemption(t *testing.T) {