Fix flaky hugepages tests by decreasing page count

If requesting an substantial amount of huge page memory
(like the tests), it is recommended to to it as early
after boot as possible, or by using the kernel cmd line.

Author: odinuge

test/e2e_node/hugepages_test.go

@@ -84,9 +84,9 @@ func makePodToVerifyHugePages(baseName string, hugePagesLimit resource.Quantity)
 	return pod
 }
 
-// configureHugePages attempts to allocate 100Mi of 2Mi hugepages for testing purposes
+// configureHugePages attempts to allocate 10Mi of 2Mi hugepages for testing purposes
 func configureHugePages() error {
-	err := exec.Command("/bin/sh", "-c", "echo 50 > /proc/sys/vm/nr_hugepages").Run()
+	err := exec.Command("/bin/sh", "-c", "echo 5 > /proc/sys/vm/nr_hugepages").Run()
 	if err != nil {
 		return err
 	}
@@ -99,10 +99,10 @@ func configureHugePages() error {
 		return err
 	}
 	e2elog.Logf("HugePages_Total is set to %v", numHugePages)
-	if numHugePages == 50 {
+	if numHugePages == 5 {
 		return nil
 	}
-	return fmt.Errorf("expected hugepages %v, but found %v", 50, numHugePages)
+	return fmt.Errorf("expected hugepages %v, but found %v", 5, numHugePages)
 }
 
 // releaseHugePages releases all pre-allocated hugepages
@@ -154,7 +154,7 @@ func runHugePagesTests(f *framework.Framework) {
 							Limits: v1.ResourceList{
 								v1.ResourceName("cpu"):           resource.MustParse("10m"),
 								v1.ResourceName("memory"):        resource.MustParse("100Mi"),
-								v1.ResourceName("hugepages-2Mi"): resource.MustParse("50Mi"),
+								v1.ResourceName("hugepages-2Mi"): resource.MustParse("6Mi"),
 							},
 						},
 					},
@@ -163,7 +163,7 @@ func runHugePagesTests(f *framework.Framework) {
 		})
 		podUID := string(pod.UID)
 		ginkgo.By("checking if the expected hugetlb settings were applied")
-		verifyPod := makePodToVerifyHugePages("pod"+podUID, resource.MustParse("50Mi"))
+		verifyPod := makePodToVerifyHugePages("pod"+podUID, resource.MustParse("6Mi"))
 		f.PodClient().Create(verifyPod)
 		err := e2epod.WaitForPodSuccessInNamespace(f.ClientSet, verifyPod.Name, f.Namespace.Name)
 		framework.ExpectNoError(err)
@@ -194,7 +194,7 @@ var _ = SIGDescribe("HugePages [Serial] [Feature:HugePages][NodeFeature:HugePage
 			ginkgo.By("by waiting for hugepages resource to become available on the local node")
 			gomega.Eventually(func() string {
 				return pollResourceAsString(f, "hugepages-2Mi")
-			}, 30*time.Second, framework.Poll).Should(gomega.Equal("100Mi"))
+			}, 30*time.Second, framework.Poll).Should(gomega.Equal("10Mi"))
 		})
 
 		runHugePagesTests(f)