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e2e testing for hugepages downward api

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This commit is contained in:
Derek Carr 2021-03-01 17:32:00 -05:00
parent 2d9cb74bc7
commit 6215b12c84
2 changed files with 112 additions and 0 deletions
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104
test/e2e/common/node/downwardapi.go
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@ -25,6 +25,7 @@ import (
"k8s.io/apimachinery/pkg/util/uuid"
"k8s.io/kubernetes/test/e2e/framework"
e2enetwork "k8s.io/kubernetes/test/e2e/framework/network"
e2eskipper "k8s.io/kubernetes/test/e2e/framework/skipper"
imageutils "k8s.io/kubernetes/test/utils/image"
"github.com/onsi/ginkgo"
@ -283,6 +284,109 @@ var _ = SIGDescribe("Downward API", func() {
})
})
var _ = SIGDescribe("Downward API [Serial] [Disruptive] [NodeFeature:DownwardAPIHugePages]", func() {
f := framework.NewDefaultFramework("downward-api")
ginkgo.Context("Downward API tests for hugepages", func() {
ginkgo.BeforeEach(func() {
e2eskipper.SkipUnlessDownwardAPIHugePagesEnabled()
})
ginkgo.It("should provide container's limits.hugepages-<pagesize> and requests.hugepages-<pagesize> as env vars", func() {
podName := "downward-api-" + string(uuid.NewUUID())
env := []v1.EnvVar{
{
Name: "HUGEPAGES_LIMIT",
ValueFrom: &v1.EnvVarSource{
ResourceFieldRef: &v1.ResourceFieldSelector{
Resource: "limits.hugepages-2Mi",
},
},
},
{
Name: "HUGEPAGES_REQUEST",
ValueFrom: &v1.EnvVarSource{
ResourceFieldRef: &v1.ResourceFieldSelector{
Resource: "requests.hugepages-2Mi",
},
},
},
}
// Important: we explicitly request no hugepages so the test can run where none are present.
expectations := []string{
fmt.Sprintf("HUGEPAGES_LIMIT=%d", 0),
fmt.Sprintf("HUGEPAGES_REQUEST=%d", 0),
}
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: podName,
Labels: map[string]string{"name": podName},
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: "dapi-container",
Image: imageutils.GetE2EImage(imageutils.BusyBox),
Command: []string{"sh", "-c", "env"},
Resources: v1.ResourceRequirements{
Requests: v1.ResourceList{
"cpu": resource.MustParse("10m"),
"hugepages-2Mi": resource.MustParse("0Mi"),
},
Limits: v1.ResourceList{
"hugepages-2Mi": resource.MustParse("0Mi"),
},
},
Env: env,
},
},
RestartPolicy: v1.RestartPolicyNever,
},
}
testDownwardAPIUsingPod(f, pod, env, expectations)
})
ginkgo.It("should provide default limits.hugepages-<pagesize> from node allocatable", func() {
podName := "downward-api-" + string(uuid.NewUUID())
env := []v1.EnvVar{
{
Name: "HUGEPAGES_LIMIT",
ValueFrom: &v1.EnvVarSource{
ResourceFieldRef: &v1.ResourceFieldSelector{
Resource: "limits.hugepages-2Mi",
},
},
},
}
// Important: we allow for 0 so the test passes in environments where no hugepages are allocated.
expectations := []string{
"HUGEPAGES_LIMIT=((0)|([1-9][0-9]*))\n",
}
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: podName,
Labels: map[string]string{"name": podName},
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: "dapi-container",
Image: imageutils.GetE2EImage(imageutils.BusyBox),
Command: []string{"sh", "-c", "env"},
Env: env,
},
},
RestartPolicy: v1.RestartPolicyNever,
},
}
testDownwardAPIUsingPod(f, pod, env, expectations)
})
})
})
func testDownwardAPI(f *framework.Framework, podName string, env []v1.EnvVar, expectations []string) {
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{

8
test/e2e/framework/skipper/skipper.go
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@ -46,6 +46,8 @@ import (
// New local storage types to support local storage capacity isolation
var localStorageCapacityIsolation featuregate.Feature = "LocalStorageCapacityIsolation"
var downwardAPIHugePages featuregate.Feature = "DownwardAPIHugePages"
func skipInternalf(caller int, format string, args ...interface{}) {
msg := fmt.Sprintf(format, args...)
framework.Logf(msg)
@ -137,6 +139,12 @@ func SkipUnlessLocalEphemeralStorageEnabled() {
}
}
func SkipUnlessDownwardAPIHugePagesEnabled() {
if !utilfeature.DefaultFeatureGate.Enabled(downwardAPIHugePages) {
skipInternalf(1, "Only supported when %v feature is enabled", downwardAPIHugePages)
}
}
// SkipIfMissingResource skips if the gvr resource is missing.
func SkipIfMissingResource(dynamicClient dynamic.Interface, gvr schema.GroupVersionResource, namespace string) {
resourceClient := dynamicClient.Resource(gvr).Namespace(namespace)