Fixes 'Zone is empty' errors in PD upgrade tests; skips pd tests with inline…

test/e2e/framework/pv_util.go

@@ -708,6 +708,14 @@ func createPD(zone string) (string, error) {
 			return "", err
 		}
 
+		if zone == "" && TestContext.CloudConfig.MultiZone {
+			zones, err := gceCloud.GetAllZonesFromCloudProvider()
+			if err != nil {
+				return "", err
+			}
+			zone, _ = zones.PopAny()
+		}
+
 		tags := map[string]string{}
 		err = gceCloud.CreateDisk(pdName, gcecloud.DiskTypeSSD, zone, 10 /* sizeGb */, tags)
 		if err != nil {

test/e2e/framework/util.go

@@ -348,6 +348,16 @@ func SkipUnlessMultizone(c clientset.Interface) {
 	}
 }
 
+func SkipIfMultizone(c clientset.Interface) {
+	zones, err := GetClusterZones(c)
+	if err != nil {
+		Skipf("Error listing cluster zones")
+	}
+	if zones.Len() > 1 {
+		Skipf("Requires more than one zone")
+	}
+}
+
 func SkipUnlessClusterMonitoringModeIs(supportedMonitoring ...string) {
 	if !ClusterMonitoringModeIs(supportedMonitoring...) {
 		Skipf("Only next monitoring modes are supported %v (not %s)", supportedMonitoring, TestContext.ClusterMonitoringMode)

test/e2e/storage/pd.go

@@ -70,6 +70,8 @@ var _ = utils.SIGDescribe("Pod Disks", func() {
 		cs = f.ClientSet
 		ns = f.Namespace.Name
 
+		framework.SkipIfMultizone(cs)
+
 		podClient = cs.CoreV1().Pods(ns)
 		nodeClient = cs.CoreV1().Nodes()
 		nodes = framework.GetReadySchedulableNodesOrDie(cs)