OCPNODE-4516: Migrate testcase 67564 from OTP to origin

test/extended/node/README.md

@@ -19,6 +19,7 @@ This directory contains OpenShift end-to-end tests for node-related features.
 - **image_volume.go** - Tests mounting container images as volumes in pods, including subPath and error handling
 - **node_swap.go** - Tests default kubelet swap settings (failSwapOn and swapBehavior) and rejection of user overrides
 - **zstd_chunked.go** - Tests building and running images with zstd:chunked compression format
+- **node_e2e/node.go** - PodDisruptionBudget drain blocking (OCP-67564) - Tests that node drain is blocked when PDB has minAvailable=100% with empty selector [Disruptive] [Lifecycle:informing]
 
 ## Directory Structure
 

test/extended/node/node_e2e/node.go

@@ -9,16 +9,23 @@ import (
 
 	g "github.com/onsi/ginkgo/v2"
 	o "github.com/onsi/gomega"
+	ote "github.com/openshift-eng/openshift-tests-extension/pkg/ginkgo"
 
 	configv1 "github.com/openshift/api/config/v1"
 	"github.com/openshift/origin/test/extended/imagepolicy"
+	appsv1 "k8s.io/api/apps/v1"
+	corev1 "k8s.io/api/core/v1"
+	policyv1 "k8s.io/api/policy/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/intstr"
 	utilrand "k8s.io/apimachinery/pkg/util/rand"
 	"k8s.io/apimachinery/pkg/util/wait"
 	e2e "k8s.io/kubernetes/test/e2e/framework"
+	"k8s.io/utils/ptr"
 
 	nodeutils "github.com/openshift/origin/test/extended/node"
 	exutil "github.com/openshift/origin/test/extended/util"
+	"github.com/openshift/origin/test/extended/util/operator"
 )
 
 var _ = g.Describe("[sig-node] [Jira:Node/Kubelet] Kubelet, CRI-O, CPU manager", func() {
@@ -164,6 +171,153 @@ var _ = g.Describe("[sig-node] [Jira:Node/Kubelet] Kubelet, CRI-O, CPU manager",
 		e2e.Logf("/dev/fuse mount output: %s", output)
 		o.Expect(output).To(o.ContainSubstring("fuse"), "dev fuse is not mounted inside pod")
 	})
+
+	//author: bgudi@redhat.com
+	g.It("[OTP] Node's drain should block when PodDisruptionBudget minAvailable equals 100 percentage and selector is empty [Disruptive] [OCP-67564]", ote.Informing(), func() {
+		ctx := context.Background()
+
+		// Skip on SNO/External topologies where there might not be dedicated worker nodes
+		infra, err := oc.AdminConfigClient().ConfigV1().Infrastructures().Get(ctx, "cluster", metav1.GetOptions{})
+		o.Expect(err).NotTo(o.HaveOccurred(), "failed to get cluster infrastructure")
+		if infra.Status.ControlPlaneTopology == "SingleReplica" || infra.Status.ControlPlaneTopology == "External" {
+			g.Skip("Skipping on SNO/External topology - requires dedicated worker nodes")
+		}
+
+		oc.SetupProject()
+		namespace := oc.Namespace()
+
+		g.By("Create a deployment with 6 replicas")
+		replicas := int32(6)
+		deployment := &appsv1.Deployment{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      "hello-openshift",
+				Namespace: namespace,
+				Labels: map[string]string{
+					"app": "myapp",
+				},
+			},
+			Spec: appsv1.DeploymentSpec{
+				Replicas: &replicas,
+				Selector: &metav1.LabelSelector{
+					MatchLabels: map[string]string{
+						"app": "myapp",
+					},
+				},
+				Template: corev1.PodTemplateSpec{
+					ObjectMeta: metav1.ObjectMeta{
+						Name: "myapp",
+						Labels: map[string]string{
+							"app": "myapp",
+						},
+					},
+					Spec: corev1.PodSpec{
+						SecurityContext: &corev1.PodSecurityContext{
+							RunAsNonRoot: ptr.To(true),
+							SeccompProfile: &corev1.SeccompProfile{
+								Type: corev1.SeccompProfileTypeRuntimeDefault,
+							},
+						},
+						Containers: []corev1.Container{
+							{
+								Name:  "myapp",
+								Image: "quay.io/openshifttest/hello-openshift@sha256:4200f438cf2e9446f6bcff9d67ceea1f69ed07a2f83363b7fb52529f7ddd8a83",
+								SecurityContext: &corev1.SecurityContext{
+									AllowPrivilegeEscalation: ptr.To(false),
+									Capabilities: &corev1.Capabilities{
+										Drop: []corev1.Capability{"ALL"},
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		}
+		_, err = oc.KubeClient().AppsV1().Deployments(namespace).Create(ctx, deployment, metav1.CreateOptions{})
+		o.Expect(err).NotTo(o.HaveOccurred(), "failed to create deployment")
+		g.DeferCleanup(oc.KubeClient().AppsV1().Deployments(namespace).Delete, ctx, "hello-openshift", metav1.DeleteOptions{})
+
+		g.By("Wait for deployment to be ready")
+		err = wait.PollUntilContextTimeout(ctx, 3*time.Second, 5*time.Minute, true, func(ctx context.Context) (bool, error) {
+			deploy, pollErr := oc.KubeClient().AppsV1().Deployments(namespace).Get(ctx, "hello-openshift", metav1.GetOptions{})
+			if pollErr != nil {
+				e2e.Logf("Error getting deployment: %v", pollErr)
+				return false, nil
+			}
+			if deploy.Status.ReadyReplicas == replicas {
+				e2e.Logf("Deployment is ready with %d replicas", deploy.Status.ReadyReplicas)
+				return true, nil
+			}
+			e2e.Logf("Waiting for deployment, ready replicas: %d/%d", deploy.Status.ReadyReplicas, replicas)
+			return false, nil
+		})
+		o.Expect(err).NotTo(o.HaveOccurred(), "deployment did not become ready")
+
+		g.By("Create PodDisruptionBudget with 100% minAvailable")
+		pdb := &policyv1.PodDisruptionBudget{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      "my-pdb",
+				Namespace: namespace,
+			},
+			Spec: policyv1.PodDisruptionBudgetSpec{
+				MinAvailable: &intstr.IntOrString{
+					Type:   intstr.String,
+					StrVal: "100%",
+				},
+				Selector: &metav1.LabelSelector{},
+			},
+		}
+		_, err = oc.KubeClient().PolicyV1().PodDisruptionBudgets(namespace).Create(ctx, pdb, metav1.CreateOptions{})
+		o.Expect(err).NotTo(o.HaveOccurred(), "failed to create PodDisruptionBudget")
+		g.DeferCleanup(oc.KubeClient().PolicyV1().PodDisruptionBudgets(namespace).Delete, ctx, "my-pdb", metav1.DeleteOptions{})
+
+		g.By("Get a single worker node")
+		workers, err := exutil.GetReadySchedulableWorkerNodes(ctx, oc.AdminKubeClient())
+		o.Expect(err).NotTo(o.HaveOccurred(), "failed to get worker nodes")
+		o.Expect(workers).NotTo(o.BeEmpty(), "no ready schedulable worker nodes found")
+		workerNode := workers[0].Name
+		e2e.Logf("Selected worker node: %s", workerNode)
+
+		g.By("Obtain the pods running on the selected worker node")
+		podsInWorker, err := oc.AsAdmin().WithoutNamespace().Run("get").Args("pods", "-n", namespace, "-o=jsonpath={.items[?(@.spec.nodeName=='"+workerNode+"')].metadata.name}").Output()
+		o.Expect(err).NotTo(o.HaveOccurred(), "failed to get pods on worker node")
+		o.Expect(len(strings.Fields(podsInWorker))).Should(o.BeNumerically(">", 0), "no pods found on worker node")
+
+		g.By("Make sure that PDB's DisruptionAllowed condition is False")
+		var pdbStatus string
+		err = wait.PollUntilContextTimeout(ctx, 2*time.Second, 30*time.Second, true, func(pollCtx context.Context) (bool, error) {
+			var pollErr error
+			pdbStatus, pollErr = oc.AsAdmin().WithoutNamespace().Run("get").Args("poddisruptionbudget", "my-pdb", "-n", namespace, "-o=jsonpath={.status.conditions[?(@.type==\"DisruptionAllowed\")].status}").Output()
+			if pollErr != nil {
+				e2e.Logf("Error getting PDB status: %v", pollErr)
+				return false, nil
+			}
+			if pdbStatus != "" {
+				return true, nil
+			}
+			e2e.Logf("Waiting for PDB DisruptionAllowed condition to appear")
+			return false, nil
+		})
+		o.Expect(err).NotTo(o.HaveOccurred(), "PDB DisruptionAllowed condition not found")
+		o.Expect(pdbStatus).Should(o.Equal("False"), "PDB DisruptionAllowed should be False")
+
+		g.By("Drain the selected worker node")
+		g.DeferCleanup(func() {
+			err := operator.WaitForOperatorsToSettle(ctx, oc.AdminConfigClient(), 10)
+			o.Expect(err).NotTo(o.HaveOccurred(), "cluster operators failed to return to available state after node drain")
+		})
+		g.DeferCleanup(oc.AsAdmin().WithoutNamespace().Run("adm").Args("uncordon", workerNode).Execute)
+
+		out, err := oc.AsAdmin().WithoutNamespace().Run("adm").Args("drain", workerNode, "--ignore-daemonsets", "--delete-emptydir-data", "--timeout=30s").Output()
+		o.Expect(err).To(o.HaveOccurred(), "drain operation should have been blocked but it wasn't")
+		o.Expect(strings.Contains(out, "Cannot evict pod as it would violate the pod's disruption budget")).Should(o.BeTrue(), "drain output missing PDB violation error message")
+		o.Expect(strings.Contains(out, "There are pending nodes to be drained")).Should(o.BeTrue(), "drain output missing pending nodes error message")
+
+		g.By("Verify that the pods were not drained from the node")
+		podsAfterDrain, err := oc.AsAdmin().WithoutNamespace().Run("get").Args("pods", "-n", namespace, "-o=jsonpath={.items[?(@.spec.nodeName=='"+workerNode+"')].metadata.name}").Output()
+		o.Expect(err).NotTo(o.HaveOccurred(), "failed to get pods after drain attempt")
+		o.Expect(podsInWorker).Should(o.BeIdenticalTo(podsAfterDrain), "pods should not have been evicted from the node")
+	})
 })
 
 // author: asahay@redhat.com