Merge pull request #117201 from pohly/scheduler-perf-node-labels

test/integration: create nodes directly with kubernetes.io/hostname label

test/integration/framework/perf_utils.go

@@ -22,6 +22,7 @@ import (
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/rand"
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/klog/v2"
 	testutils "k8s.io/kubernetes/test/utils"
@@ -89,7 +90,20 @@ func (p *IntegrationTestNodePreparer) PrepareNodes(ctx context.Context, nextNode
 	for i := 0; i < numNodes; i++ {
 		var err error
 		for retry := 0; retry < retries; retry++ {
-			_, err = p.client.CoreV1().Nodes().Create(ctx, baseNode, metav1.CreateOptions{})
+			// Create nodes with the usual kubernetes.io/hostname label.
+			// For that we need to know the name in advance, if we want to
+			// do it in one request.
+			node := baseNode.DeepCopy()
+			name := node.Name
+			if name == "" {
+				name = node.GenerateName + rand.String(5)
+				node.Name = name
+			}
+			if node.Labels == nil {
+				node.Labels = make(map[string]string)
+			}
+			node.Labels["kubernetes.io/hostname"] = name
+			_, err = p.client.CoreV1().Nodes().Create(ctx, node, metav1.CreateOptions{})
 			if err == nil {
 				break
 			}