Add BuildArgs to interpodaffinity plugin

Signed-off-by: Aldo Culquicondor <acondor@google.com>

pkg/scheduler/framework/plugins/interpodaffinity/BUILD

@@ -22,6 +22,7 @@ go_library(
         "//staging/src/k8s.io/apimachinery/pkg/util/validation/field:go_default_library",
         "//staging/src/k8s.io/client-go/util/workqueue:go_default_library",
         "//vendor/k8s.io/klog:go_default_library",
+        "//vendor/k8s.io/utils/pointer:go_default_library",
     ],
 )
 
@@ -39,6 +40,7 @@ go_test(
         "//staging/src/k8s.io/api/core/v1:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
+        "//vendor/k8s.io/utils/pointer:go_default_library",
     ],
 )
 

pkg/scheduler/framework/plugins/interpodaffinity/plugin.go

@@ -24,6 +24,7 @@ import (
 	"k8s.io/apimachinery/pkg/util/validation/field"
 	framework "k8s.io/kubernetes/pkg/scheduler/framework/v1alpha1"
 	schedulerlisters "k8s.io/kubernetes/pkg/scheduler/listers"
+	"k8s.io/utils/pointer"
 )
 
 const (
@@ -52,8 +53,8 @@ var _ framework.ScorePlugin = &InterPodAffinity{}
 
 // InterPodAffinity is a plugin that checks inter pod affinity
 type InterPodAffinity struct {
-	sharedLister          schedulerlisters.SharedLister
+	Args
-	hardPodAffinityWeight int32
+	sharedLister schedulerlisters.SharedLister
 	sync.Mutex
 }
 
@@ -62,24 +63,27 @@ func (pl *InterPodAffinity) Name() string {
 	return Name
 }
 
+// BuildArgs returns the args that were used to build the plugin.
+func (pl *InterPodAffinity) BuildArgs() interface{} {
+	return pl.Args
+}
+
 // New initializes a new plugin and returns it.
 func New(plArgs *runtime.Unknown, h framework.FrameworkHandle) (framework.Plugin, error) {
 	if h.SnapshotSharedLister() == nil {
 		return nil, fmt.Errorf("SnapshotSharedlister is nil")
 	}
-	args := &Args{}
-	if err := framework.DecodeInto(plArgs, args); err != nil {
-		return nil, err
-	}
-	if err := validateArgs(args); err != nil {
-		return nil, err
-	}
 	pl := &InterPodAffinity{
-		sharedLister:          h.SnapshotSharedLister(),
+		sharedLister: h.SnapshotSharedLister(),
-		hardPodAffinityWeight: DefaultHardPodAffinityWeight,
 	}
-	if args.HardPodAffinityWeight != nil {
+	if err := framework.DecodeInto(plArgs, &pl.Args); err != nil {
-		pl.hardPodAffinityWeight = *args.HardPodAffinityWeight
+		return nil, err
+	}
+	if err := validateArgs(&pl.Args); err != nil {
+		return nil, err
+	}
+	if pl.HardPodAffinityWeight == nil {
+		pl.HardPodAffinityWeight = pointer.Int32Ptr(DefaultHardPodAffinityWeight)
 	}
 	return pl, nil
 }

pkg/scheduler/framework/plugins/interpodaffinity/scoring.go

@@ -127,7 +127,7 @@ func (pl *InterPodAffinity) processExistingPod(state *preScoreState, existingPod
 		// For every hard pod affinity term of <existingPod>, if <pod> matches the term,
 		// increment <p.counts> for every node in the cluster with the same <term.TopologyKey>
 		// value as that of <existingPod>'s node by the constant <ipa.hardPodAffinityWeight>
-		if pl.hardPodAffinityWeight > 0 {
+		if *pl.HardPodAffinityWeight > 0 {
 			terms := existingPodAffinity.PodAffinity.RequiredDuringSchedulingIgnoredDuringExecution
 			// TODO: Uncomment this block when implement RequiredDuringSchedulingRequiredDuringExecution.
 			//if len(existingPodAffinity.PodAffinity.RequiredDuringSchedulingRequiredDuringExecution) != 0 {
@@ -135,7 +135,7 @@ func (pl *InterPodAffinity) processExistingPod(state *preScoreState, existingPod
 			//}
 			for i := range terms {
 				term := &terms[i]
-				processedTerm, err := newWeightedAffinityTerm(existingPod, term, pl.hardPodAffinityWeight)
+				processedTerm, err := newWeightedAffinityTerm(existingPod, term, *pl.HardPodAffinityWeight)
 				if err != nil {
 					return err
 				}

pkg/scheduler/framework/plugins/interpodaffinity/scoring_test.go

@@ -27,6 +27,7 @@ import (
 	"k8s.io/apimachinery/pkg/runtime"
 	framework "k8s.io/kubernetes/pkg/scheduler/framework/v1alpha1"
 	"k8s.io/kubernetes/pkg/scheduler/internal/cache"
+	"k8s.io/utils/pointer"
 )
 
 func TestPreferredAffinity(t *testing.T) {
@@ -519,8 +520,10 @@ func TestPreferredAffinity(t *testing.T) {
 			state := framework.NewCycleState()
 			snapshot := cache.NewSnapshot(test.pods, test.nodes)
 			p := &InterPodAffinity{
-				sharedLister:          snapshot,
+				Args: Args{
-				hardPodAffinityWeight: 1,
+					HardPodAffinityWeight: pointer.Int32Ptr(DefaultHardPodAffinityWeight),
+				},
+				sharedLister: snapshot,
 			}
 
 			status := p.PreScore(context.Background(), state, test.pod, test.nodes)