Add e2e test for removing the subpath directory

test/e2e/storage/testsuites/subpath.go

@@ -22,7 +22,7 @@ import (
 	"regexp"
 	"strings"
 
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/util/rand"
 	"k8s.io/apimachinery/pkg/util/wait"
@@ -361,6 +361,31 @@ func testSubPath(input *subPathTestInput) {
 		testReadFile(input.f, input.filePathInSubpath, input.pod, 0)
 	})
 
+	It("should be able to unmount after the subpath directory is deleted", func() {
+		// Change volume container to busybox so we can exec later
+		input.pod.Spec.Containers[1].Image = imageutils.GetE2EImage(imageutils.BusyBox)
+		input.pod.Spec.Containers[1].Command = []string{"/bin/sh", "-ec", "sleep 100000"}
+
+		By(fmt.Sprintf("Creating pod %s", input.pod.Name))
+		pod, err := input.f.ClientSet.CoreV1().Pods(input.f.Namespace.Name).Create(input.pod)
+		Expect(err).ToNot(HaveOccurred(), "while creating pod")
+		defer func() {
+			By(fmt.Sprintf("Deleting pod %s", pod.Name))
+			framework.DeletePodWithWait(input.f, input.f.ClientSet, pod)
+		}()
+
+		// Wait for pod to be running
+		err = framework.WaitForPodRunningInNamespace(input.f.ClientSet, pod)
+		Expect(err).ToNot(HaveOccurred(), "while waiting for pod to be running")
+
+		// Exec into container that mounted the volume, delete subpath directory
+		rmCmd := fmt.Sprintf("rm -rf %s", input.subPathDir)
+		_, err = podContainerExec(pod, 1, rmCmd)
+		Expect(err).ToNot(HaveOccurred(), "while removing subpath directory")
+
+		// Delete pod (from defer) and wait for it to be successfully deleted
+	})
+
 	// TODO: add a test case for the same disk with two partitions
 }