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Add more test cases for volume binding in the scheduler

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This commit is contained in:
Michelle Au 2018-02-22 17:42:58 -08:00
parent 47b012ec8b
commit 7167c47411
3 changed files with 105 additions and 26 deletions
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1
test/integration/scheduler/BUILD
View File

@ -11,7 +11,6 @@ go_test(
size = "large",
srcs = [
"extender_test.go",
"local-pv-neg-affinity_test.go",
"main_test.go",
"predicates_test.go",
"preemption_test.go",

12
test/integration/scheduler/util.go
View File

@ -362,6 +362,18 @@ func waitForPodToSchedule(cs clientset.Interface, pod *v1.Pod) error {
return waitForPodToScheduleWithTimeout(cs, pod, 30*time.Second)
}
// waitForPodUnscheduleWithTimeout waits for a pod to fail scheduling and returns
// an error if it does not become unschedulable within the given timeout.
func waitForPodUnschedulableWithTimeout(cs clientset.Interface, pod *v1.Pod, timeout time.Duration) error {
return wait.Poll(100*time.Millisecond, timeout, podUnschedulable(cs, pod.Namespace, pod.Name))
}
// waitForPodUnschedule waits for a pod to fail scheduling and returns
// an error if it does not become unschedulable within the timeout duration (30 seconds).
func waitForPodUnschedulable(cs clientset.Interface, pod *v1.Pod) error {
return waitForPodUnschedulableWithTimeout(cs, pod, 30*time.Second)
}
// deletePod deletes the given pod in the given namespace.
func deletePod(cs clientset.Interface, podName string, nsName string) error {
return cs.CoreV1().Pods(nsName).Delete(podName, metav1.NewDeleteOptions(0))

118
test/integration/scheduler/volume_binding_test.go
View File

@ -33,6 +33,7 @@ import (
storagev1 "k8s.io/api/storage/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/wait"
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/client-go/informers"
clientset "k8s.io/client-go/kubernetes"
@ -67,26 +68,36 @@ var (
)
const (
node1 = "node-1"
podLimit = 100
volsPerPod = 5
affinityLabelKey = "kubernetes.io/hostname"
node1 = "node-1"
node2 = "node-2"
podLimit = 100
volsPerPod = 5
nodeAffinityLabelKey = "kubernetes.io/hostname"
)
func TestVolumeBinding(t *testing.T) {
config := setupNodes(t, "volume-scheduling", 2)
config := setupCluster(t, "volume-scheduling", 2)
defer config.teardown()
cases := map[string]struct {
pod *v1.Pod
pvs []*v1.PersistentVolume
pvcs []*v1.PersistentVolumeClaim
// Create these, but they should not be bound in the end
unboundPvcs []*v1.PersistentVolumeClaim
unboundPvs []*v1.PersistentVolume
shouldFail bool
}{
"immediate can bind": {
pod: makePod("pod-i-canbind", config.ns, []string{"pvc-i-canbind"}),
pvs: []*v1.PersistentVolume{makePV(t, "pv-i-canbind", classImmediate, "", "", node1)},
pvcs: []*v1.PersistentVolumeClaim{makePVC("pvc-i-canbind", config.ns, &classImmediate, "")},
},
"immediate cannot bind": {
pod: makePod("pod-i-cannotbind", config.ns, []string{"pvc-i-cannotbind"}),
unboundPvcs: []*v1.PersistentVolumeClaim{makePVC("pvc-i-cannotbind", config.ns, &classImmediate, "")},
shouldFail: true,
},
"immediate pvc prebound": {
pod: makePod("pod-i-pvc-prebound", config.ns, []string{"pvc-i-prebound"}),
pvs: []*v1.PersistentVolume{makePV(t, "pv-i-pvc-prebound", classImmediate, "", "", node1)},
@ -102,6 +113,11 @@ func TestVolumeBinding(t *testing.T) {
pvs: []*v1.PersistentVolume{makePV(t, "pv-w-canbind", classWait, "", "", node1)},
pvcs: []*v1.PersistentVolumeClaim{makePVC("pvc-w-canbind", config.ns, &classWait, "")},
},
"wait cannot bind": {
pod: makePod("pod-w-cannotbind", config.ns, []string{"pvc-w-cannotbind"}),
unboundPvcs: []*v1.PersistentVolumeClaim{makePVC("pvc-w-cannotbind", config.ns, &classWait, "")},
shouldFail: true,
},
"wait pvc prebound": {
pod: makePod("pod-w-pvc-prebound", config.ns, []string{"pvc-w-prebound"}),
pvs: []*v1.PersistentVolume{makePV(t, "pv-w-pvc-prebound", classWait, "", "", node1)},
@ -115,13 +131,28 @@ func TestVolumeBinding(t *testing.T) {
"wait can bind two": {
pod: makePod("pod-w-canbind-2", config.ns, []string{"pvc-w-canbind-2", "pvc-w-canbind-3"}),
pvs: []*v1.PersistentVolume{
makePV(t, "pv-w-canbind-2", classWait, "", "", node1),
makePV(t, "pv-w-canbind-3", classWait, "", "", node1),
makePV(t, "pv-w-canbind-2", classWait, "", "", node2),
makePV(t, "pv-w-canbind-3", classWait, "", "", node2),
},
pvcs: []*v1.PersistentVolumeClaim{
makePVC("pvc-w-canbind-2", config.ns, &classWait, ""),
makePVC("pvc-w-canbind-3", config.ns, &classWait, ""),
},
unboundPvs: []*v1.PersistentVolume{
makePV(t, "pv-w-canbind-5", classWait, "", "", node1),
},
},
"wait cannot bind two": {
pod: makePod("pod-w-cannotbind-2", config.ns, []string{"pvc-w-cannotbind-1", "pvc-w-cannotbind-2"}),
unboundPvcs: []*v1.PersistentVolumeClaim{
makePVC("pvc-w-cannotbind-1", config.ns, &classWait, ""),
makePVC("pvc-w-cannotbind-2", config.ns, &classWait, ""),
},
unboundPvs: []*v1.PersistentVolume{
makePV(t, "pv-w-cannotbind-1", classWait, "", "", node2),
makePV(t, "pv-w-cannotbind-2", classWait, "", "", node1),
},
shouldFail: true,
},
"mix immediate and wait": {
pod: makePod("pod-mix-bound", config.ns, []string{"pvc-w-canbind-4", "pvc-i-canbind-2"}),
@ -134,11 +165,6 @@ func TestVolumeBinding(t *testing.T) {
makePVC("pvc-i-canbind-2", config.ns, &classImmediate, ""),
},
},
// TODO:
// immediate mode - PVC cannot bound
// wait mode - PVC cannot bind
// wait mode - 2 PVCs, 1 cannot bind
// wait mode - 2 pvcs, multiple nodes
}
for name, test := range cases {
@ -151,28 +177,51 @@ func TestVolumeBinding(t *testing.T) {
}
}
for _, pv := range test.unboundPvs {
if _, err := config.client.CoreV1().PersistentVolumes().Create(pv); err != nil {
t.Fatalf("Failed to create PersistentVolume %q: %v", pv.Name, err)
}
}
// Create PVCs
for _, pvc := range test.pvcs {
if _, err := config.client.CoreV1().PersistentVolumeClaims(config.ns).Create(pvc); err != nil {
t.Fatalf("Failed to create PersistentVolumeClaim %q: %v", pvc.Name, err)
}
}
for _, pvc := range test.unboundPvcs {
if _, err := config.client.CoreV1().PersistentVolumeClaims(config.ns).Create(pvc); err != nil {
t.Fatalf("Failed to create PersistentVolumeClaim %q: %v", pvc.Name, err)
}
}
// Create Pod
if _, err := config.client.CoreV1().Pods(config.ns).Create(test.pod); err != nil {
t.Fatalf("Failed to create Pod %q: %v", test.pod.Name, err)
}
if err := waitForPodToSchedule(config.client, test.pod); err != nil {
t.Errorf("Failed to schedule Pod %q: %v", test.pod.Name, err)
if test.shouldFail {
if err := waitForPodUnschedulable(config.client, test.pod); err != nil {
t.Errorf("Pod %q was not unschedulable: %v", test.pod.Name, err)
}
} else {
if err := waitForPodToSchedule(config.client, test.pod); err != nil {
t.Errorf("Failed to schedule Pod %q: %v", test.pod.Name, err)
}
}
// Validate PVC/PV binding
for _, pvc := range test.pvcs {
validatePVCPhase(t, config.client, pvc, v1.ClaimBound)
}
for _, pvc := range test.unboundPvcs {
validatePVCPhase(t, config.client, pvc, v1.ClaimPending)
}
for _, pv := range test.pvs {
validatePVPhase(t, config.client, pv, v1.VolumeBound)
}
for _, pv := range test.unboundPvs {
validatePVPhase(t, config.client, pv, v1.VolumeAvailable)
}
// TODO: validate events on Pods and PVCs
@ -184,7 +233,7 @@ func TestVolumeBinding(t *testing.T) {
// TestVolumeBindingStress creates <podLimit> pods, each with <volsPerPod> unbound PVCs.
func TestVolumeBindingStress(t *testing.T) {
config := setupNodes(t, "volume-binding-stress", 1)
config := setupCluster(t, "volume-binding-stress", 1)
defer config.teardown()
// Create enough PVs and PVCs for all the pods
@ -239,7 +288,7 @@ func TestVolumeBindingStress(t *testing.T) {
}
func TestPVAffinityConflict(t *testing.T) {
config := setupNodes(t, "volume-scheduling", 3)
config := setupCluster(t, "volume-scheduling", 3)
defer config.teardown()
pv := makePV(t, "local-pv", classImmediate, "", "", node1)
@ -255,6 +304,11 @@ func TestPVAffinityConflict(t *testing.T) {
t.Fatalf("Failed to create PersistentVolumeClaim %q: %v", pvc.Name, err)
}
// Wait for PVC bound
if err := waitForPVCBound(config.client, pvc); err != nil {
t.Fatalf("PVC %q failed to bind: %v", pvc.Name, err)
}
nodeMarkers := []interface{}{
markNodeAffinity,
markNodeSelector,
@ -268,10 +322,10 @@ func TestPVAffinityConflict(t *testing.T) {
t.Fatalf("Failed to create Pod %q: %v", pod.Name, err)
}
// Give time to shceduler to attempt to schedule pod
if err := waitForPodToSchedule(config.client, pod); err == nil {
t.Errorf("Failed as Pod %s was scheduled successfully but expected to fail", pod.Name)
if err := waitForPodUnschedulable(config.client, pod); err != nil {
t.Errorf("Failed as Pod %s was not unschedulable: %v", pod.Name, err)
}
// Deleting test pod
// Check pod conditions
p, err := config.client.CoreV1().Pods(config.ns).Get(podName, metav1.GetOptions{})
if err != nil {
t.Fatalf("Failed to access Pod %s status: %v", podName, err)
@ -283,15 +337,16 @@ func TestPVAffinityConflict(t *testing.T) {
t.Fatalf("Failed as Pod %s reason was: %s but expected: Unschedulable", podName, p.Status.Conditions[0].Reason)
}
if !strings.Contains(p.Status.Conditions[0].Message, "node(s) didn't match node selector") || !strings.Contains(p.Status.Conditions[0].Message, "node(s) had volume node affinity conflict") {
t.Fatalf("Failed as Pod's %s failure message does not contain expected message: node(s) didn't match node selector, node(s) had volume node affinity conflict", podName)
t.Fatalf("Failed as Pod's %s failure message does not contain expected message: node(s) didn't match node selector, node(s) had volume node affinity conflict. Got message %q", podName, p.Status.Conditions[0].Message)
}
// Deleting test pod
if err := config.client.CoreV1().Pods(config.ns).Delete(podName, &metav1.DeleteOptions{}); err != nil {
t.Fatalf("Failed to delete Pod %s: %v", podName, err)
}
}
}
func setupNodes(t *testing.T, nsName string, numberOfNodes int) *testConfig {
func setupCluster(t *testing.T, nsName string, numberOfNodes int) *testConfig {
h := &framework.MasterHolder{Initialized: make(chan struct{})}
s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
<-h.Initialized
@ -373,7 +428,7 @@ func setupNodes(t *testing.T, nsName string, numberOfNodes int) *testConfig {
testNode := &v1.Node{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("node-%d", i+1),
Labels: map[string]string{affinityLabelKey: fmt.Sprintf("node-%d", i+1)},
Labels: map[string]string{nodeAffinityLabelKey: fmt.Sprintf("node-%d", i+1)},
},
Spec: v1.NodeSpec{Unschedulable: false},
Status: v1.NodeStatus{
@ -458,7 +513,7 @@ func makePV(t *testing.T, name, scName, pvcName, ns, node string) *v1.Persistent
{
MatchExpressions: []v1.NodeSelectorRequirement{
{
Key: affinityLabelKey,
Key: nodeAffinityLabelKey,
Operator: v1.NodeSelectorOpIn,
Values: []string{node},
},
@ -552,6 +607,19 @@ func validatePVPhase(t *testing.T, client clientset.Interface, pv *v1.Persistent
}
}
func waitForPVCBound(client clientset.Interface, pvc *v1.PersistentVolumeClaim) error {
return wait.Poll(time.Second, 30*time.Second, func() (bool, error) {
claim, err := client.CoreV1().PersistentVolumeClaims(pvc.Namespace).Get(pvc.Name, metav1.GetOptions{})
if err != nil {
return false, err
}
if claim.Status.Phase == v1.ClaimBound {
return true, nil
}
return false, nil
})
}
func markNodeAffinity(pod *v1.Pod, node string) {
affinity := &v1.Affinity{
NodeAffinity: &v1.NodeAffinity{
@ -560,7 +628,7 @@ func markNodeAffinity(pod *v1.Pod, node string) {
{
MatchExpressions: []v1.NodeSelectorRequirement{
{
Key: affinityLabelKey,
Key: nodeAffinityLabelKey,
Operator: v1.NodeSelectorOpIn,
Values: []string{node},
},
@ -575,7 +643,7 @@ func markNodeAffinity(pod *v1.Pod, node string) {
func markNodeSelector(pod *v1.Pod, node string) {
ns := map[string]string{
affinityLabelKey: node,
nodeAffinityLabelKey: node,
}
pod.Spec.NodeSelector = ns
}