Merge pull request #56600 from edisonxiang/fixvolumesize

Automatic merge from submit-queue (batch tested with PRs 56600, 56814). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Fix volume size allocation in gcd_pd

**What this PR does / why we need it**:
GCE PDs are allocated in chunks of GBs not GiB but CreateVolume function incorrectly creates volume in chunks of GiB.  
1 GiB = 1024 * 1024 * 1024 Bytes
1 GB = 1000 * 1000 * 1000 Bytes

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #56081

**Special notes for your reviewer**:

**Release note**:

```release-note
Fixed dynamic provisioning of GCE PDs to round to the next GB instead of GiB
```

pkg/volume/gce_pd/gce_pd.go

@@ -423,7 +423,7 @@ func (c *gcePersistentDiskProvisioner) Provision() (*v1.PersistentVolume, error)
 			PersistentVolumeReclaimPolicy: c.options.PersistentVolumeReclaimPolicy,
 			AccessModes:                   c.options.PVC.Spec.AccessModes,
 			Capacity: v1.ResourceList{
-				v1.ResourceName(v1.ResourceStorage): resource.MustParse(fmt.Sprintf("%dGi", sizeGB)),
+				v1.ResourceName(v1.ResourceStorage): resource.MustParse(fmt.Sprintf("%dG", sizeGB)),
 			},
 			PersistentVolumeSource: v1.PersistentVolumeSource{
 				GCEPersistentDisk: &v1.GCEPersistentDiskVolumeSource{

pkg/volume/gce_pd/gce_pd_test.go

@@ -183,7 +183,7 @@ func TestPlugin(t *testing.T) {
 	}
 	cap := persistentSpec.Spec.Capacity[v1.ResourceStorage]
 	size := cap.Value()
-	if size != 100*1024*1024*1024 {
+	if size != 100*volume.GB {
 		t.Errorf("Provision() returned unexpected volume size: %v", size)
 	}
 

pkg/volume/gce_pd/gce_util.go

@@ -81,9 +81,8 @@ func (gceutil *GCEDiskUtil) CreateVolume(c *gcePersistentDiskProvisioner) (strin
 
 	name := volume.GenerateVolumeName(c.options.ClusterName, c.options.PVName, 63) // GCE PD name can have up to 63 characters
 	capacity := c.options.PVC.Spec.Resources.Requests[v1.ResourceName(v1.ResourceStorage)]
-	requestBytes := capacity.Value()
-	// GCE works with gigabytes, convert to GiB with rounding up
-	requestGB := volume.RoundUpSize(requestBytes, 1024*1024*1024)
+	// GCE PDs are allocated in chunks of GBs (not GiBs)
+	requestGB := volume.RoundUpToGB(capacity)
 
 	// Apply Parameters (case-insensitive). We leave validation of
 	// the values to the cloud provider.

test/e2e/storage/volume_provisioning.go

@@ -257,8 +257,8 @@ var _ = utils.SIGDescribe("Dynamic Provisioning", func() {
 						"type": "pd-ssd",
 						"zone": cloudZone,
 					},
-					"1.5Gi",
-					"2Gi",
+					"1.5G",
+					"2G",
 					func(volume *v1.PersistentVolume) error {
 						return checkGCEPD(volume, "pd-ssd")
 					},
@@ -270,8 +270,8 @@ var _ = utils.SIGDescribe("Dynamic Provisioning", func() {
 					map[string]string{
 						"type": "pd-standard",
 					},
-					"1.5Gi",
-					"2Gi",
+					"1.5G",
+					"2G",
 					func(volume *v1.PersistentVolume) error {
 						return checkGCEPD(volume, "pd-standard")
 					},
@@ -436,8 +436,8 @@ var _ = utils.SIGDescribe("Dynamic Provisioning", func() {
 				map[string]string{
 					"type": "pd-standard",
 				},
-				"1Gi",
-				"1Gi",
+				"1G",
+				"1G",
 				func(volume *v1.PersistentVolume) error {
 					return checkGCEPD(volume, "pd-standard")
 				},
@@ -470,8 +470,8 @@ var _ = utils.SIGDescribe("Dynamic Provisioning", func() {
 				map[string]string{
 					"type": "pd-standard",
 				},
-				"1Gi",
-				"1Gi",
+				"1G",
+				"1G",
 				func(volume *v1.PersistentVolume) error {
 					return checkGCEPD(volume, "pd-standard")
 				},
@@ -521,7 +521,7 @@ var _ = utils.SIGDescribe("Dynamic Provisioning", func() {
 				name:        "unmanaged_zone",
 				provisioner: "kubernetes.io/gce-pd",
 				parameters:  map[string]string{"zone": unmanagedZone},
-				claimSize:   "1Gi",
+				claimSize:   "1G",
 			}
 			sc := newStorageClass(test, ns, suffix)
 			sc, err = c.StorageV1().StorageClasses().Create(sc)
@@ -641,6 +641,14 @@ var _ = utils.SIGDescribe("Dynamic Provisioning", func() {
 				claimSize:    "2Gi",
 				expectedSize: "2Gi",
 			}
+			// gce or gke
+			if getDefaultPluginName() == "kubernetes.io/gce-pd" {
+				// using GB not GiB as e2e test unit since gce-pd returns GB,
+				// or expectedSize may be greater than claimSize.
+				test.claimSize = "2G"
+				test.expectedSize = "2G"
+			}
+
 			claim := newClaim(test, ns, "default")
 			testDynamicProvisioning(test, c, claim, nil)
 		})