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Merge pull request #65854 from cofyc/statefulset_with_podaffinity

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Automatic merge from submit-queue. 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>.

Add local volume pod affinity tests.

**What this PR does / why we need it**:

Add local volume pod affinity tests.

**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 #56100 (with already merged prs #59682, #60260)

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```
This commit is contained in:
Kubernetes Submit Queue 2018-07-10 20:00:12 -07:00 committed by GitHub
commit bababe08f6
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1 changed files with 43 additions and 25 deletions
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68
test/e2e/storage/persistent_volumes-local.go
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@ -524,17 +524,14 @@ var _ = utils.SIGDescribe("PersistentVolumes-local ", func() {
})
})
Context("StatefulSet with pod anti-affinity", func() {
Context("StatefulSet with pod affinity", func() {
var testVols map[string][]*localTestVolume
const (
ssReplicas = 3
volsPerNode = 2
volsPerNode = 6
)
BeforeEach(func() {
if len(config.nodes) < ssReplicas {
framework.Skipf("Runs only when number of nodes >= %v", ssReplicas)
}
setupStorageClass(config, &waitMode)
testVols = map[string][]*localTestVolume{}
@ -553,10 +550,19 @@ var _ = utils.SIGDescribe("PersistentVolumes-local ", func() {
cleanupStorageClass(config)
})
It("should use volumes spread across nodes", func() {
It("should use volumes spread across nodes when pod has anti-affinity", func() {
if len(config.nodes) < ssReplicas {
framework.Skipf("Runs only when number of nodes >= %v", ssReplicas)
}
By("Creating a StatefulSet with pod anti-affinity on nodes")
ss := createStatefulSet(config, ssReplicas, volsPerNode)
validateStatefulSet(config, ss)
ss := createStatefulSet(config, ssReplicas, volsPerNode, true)
validateStatefulSet(config, ss, true)
})
It("should use volumes on one node when pod has affinity", func() {
By("Creating a StatefulSet with pod affinity on nodes")
ss := createStatefulSet(config, ssReplicas, volsPerNode/ssReplicas, false)
validateStatefulSet(config, ss, false)
})
})
@ -1803,7 +1809,7 @@ func findLocalPersistentVolume(c clientset.Interface, volumePath string) (*v1.Pe
return nil, nil
}
func createStatefulSet(config *localTestConfig, ssReplicas int32, volumeCount int) *appsv1.StatefulSet {
func createStatefulSet(config *localTestConfig, ssReplicas int32, volumeCount int, anti bool) *appsv1.StatefulSet {
mounts := []v1.VolumeMount{}
claims := []v1.PersistentVolumeClaim{}
for i := 0; i < volumeCount; i++ {
@ -1813,25 +1819,32 @@ func createStatefulSet(config *localTestConfig, ssReplicas int32, volumeCount in
claims = append(claims, *pvc)
}
affinity := v1.Affinity{
PodAntiAffinity: &v1.PodAntiAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{
{
LabelSelector: &metav1.LabelSelector{
MatchExpressions: []metav1.LabelSelectorRequirement{
{
Key: "app",
Operator: metav1.LabelSelectorOpIn,
Values: []string{"local-volume-test"},
},
},
podAffinityTerms := []v1.PodAffinityTerm{
{
LabelSelector: &metav1.LabelSelector{
MatchExpressions: []metav1.LabelSelectorRequirement{
{
Key: "app",
Operator: metav1.LabelSelectorOpIn,
Values: []string{"local-volume-test"},
},
TopologyKey: "kubernetes.io/hostname",
},
},
TopologyKey: "kubernetes.io/hostname",
},
}
affinity := v1.Affinity{}
if anti {
affinity.PodAntiAffinity = &v1.PodAntiAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: podAffinityTerms,
}
} else {
affinity.PodAffinity = &v1.PodAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: podAffinityTerms,
}
}
labels := map[string]string{"app": "local-volume-test"}
spec := &appsv1.StatefulSet{
ObjectMeta: metav1.ObjectMeta{
@ -1870,16 +1883,21 @@ func createStatefulSet(config *localTestConfig, ssReplicas int32, volumeCount in
return ss
}
func validateStatefulSet(config *localTestConfig, ss *appsv1.StatefulSet) {
func validateStatefulSet(config *localTestConfig, ss *appsv1.StatefulSet, anti bool) {
pods := config.ssTester.GetPodList(ss)
// Verify that each pod is on a different node
nodes := sets.NewString()
for _, pod := range pods.Items {
nodes.Insert(pod.Spec.NodeName)
}
Expect(nodes.Len()).To(Equal(len(pods.Items)))
if anti {
// Verify that each pod is on a different node
Expect(nodes.Len()).To(Equal(len(pods.Items)))
} else {
// Verify that all pods are on same node.
Expect(nodes.Len()).To(Equal(1))
}
// Validate all PVCs are bound
for _, pod := range pods.Items {