/
predicates.go
1189 lines (1064 loc) · 46 KB
/
predicates.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
Copyright 2015 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package scheduling
import (
"context"
"encoding/json"
"fmt"
"time"
v1 "k8s.io/api/core/v1"
nodev1 "k8s.io/api/node/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/strategicpatch"
"k8s.io/apimachinery/pkg/util/uuid"
utilversion "k8s.io/apimachinery/pkg/util/version"
clientset "k8s.io/client-go/kubernetes"
podutil "k8s.io/kubernetes/pkg/api/v1/pod"
"k8s.io/kubernetes/test/e2e/feature"
"k8s.io/kubernetes/test/e2e/framework"
e2enode "k8s.io/kubernetes/test/e2e/framework/node"
e2eruntimeclass "k8s.io/kubernetes/test/e2e/framework/node/runtimeclass"
e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
e2erc "k8s.io/kubernetes/test/e2e/framework/rc"
e2eskipper "k8s.io/kubernetes/test/e2e/framework/skipper"
testutils "k8s.io/kubernetes/test/utils"
imageutils "k8s.io/kubernetes/test/utils/image"
admissionapi "k8s.io/pod-security-admission/api"
"github.com/onsi/ginkgo/v2"
"github.com/onsi/gomega"
// ensure libs have a chance to initialize
_ "github.com/stretchr/testify/assert"
)
const (
maxNumberOfPods int64 = 10
defaultTimeout = 3 * time.Minute
)
var localStorageVersion = utilversion.MustParseSemantic("v1.8.0-beta.0")
// variable populated in BeforeEach, never modified afterwards
var workerNodes = sets.Set[string]{}
type pausePodConfig struct {
Name string
Namespace string
Finalizers []string
Affinity *v1.Affinity
Annotations, Labels, NodeSelector map[string]string
Resources *v1.ResourceRequirements
RuntimeClassHandler *string
Tolerations []v1.Toleration
NodeName string
Ports []v1.ContainerPort
OwnerReferences []metav1.OwnerReference
PriorityClassName string
DeletionGracePeriodSeconds *int64
TopologySpreadConstraints []v1.TopologySpreadConstraint
SchedulingGates []v1.PodSchedulingGate
}
var _ = SIGDescribe("SchedulerPredicates", framework.WithSerial(), func() {
var cs clientset.Interface
var nodeList *v1.NodeList
var RCName string
var ns string
f := framework.NewDefaultFramework("sched-pred")
f.NamespacePodSecurityLevel = admissionapi.LevelPrivileged
ginkgo.AfterEach(func(ctx context.Context) {
rc, err := cs.CoreV1().ReplicationControllers(ns).Get(ctx, RCName, metav1.GetOptions{})
if err == nil && *(rc.Spec.Replicas) != 0 {
ginkgo.By("Cleaning up the replication controller")
err := e2erc.DeleteRCAndWaitForGC(ctx, f.ClientSet, ns, RCName)
framework.ExpectNoError(err)
}
})
ginkgo.BeforeEach(func(ctx context.Context) {
cs = f.ClientSet
ns = f.Namespace.Name
nodeList = &v1.NodeList{}
var err error
e2enode.AllNodesReady(ctx, cs, time.Minute)
nodeList, err = e2enode.GetReadySchedulableNodes(ctx, cs)
if err != nil {
framework.Logf("Unexpected error occurred: %v", err)
}
framework.ExpectNoErrorWithOffset(0, err)
for _, n := range nodeList.Items {
workerNodes.Insert(n.Name)
}
err = framework.CheckTestingNSDeletedExcept(ctx, cs, ns)
framework.ExpectNoError(err)
for _, node := range nodeList.Items {
framework.Logf("\nLogging pods the apiserver thinks is on node %v before test", node.Name)
printAllPodsOnNode(ctx, cs, node.Name)
}
})
// This test verifies we don't allow scheduling of pods in a way that sum of local ephemeral storage resource requests of pods is greater than machines capacity.
// It assumes that cluster add-on pods stay stable and cannot be run in parallel with any other test that touches Nodes or Pods.
// It is so because we need to have precise control on what's running in the cluster.
f.It("validates local ephemeral storage resource limits of pods that are allowed to run", feature.LocalStorageCapacityIsolation, func(ctx context.Context) {
e2eskipper.SkipUnlessServerVersionGTE(localStorageVersion, f.ClientSet.Discovery())
nodeMaxAllocatable := int64(0)
nodeToAllocatableMap := make(map[string]int64)
for _, node := range nodeList.Items {
allocatable, found := node.Status.Allocatable[v1.ResourceEphemeralStorage]
if !found {
framework.Failf("node.Status.Allocatable %v does not contain entry %v", node.Status.Allocatable, v1.ResourceEphemeralStorage)
}
nodeToAllocatableMap[node.Name] = allocatable.Value()
if nodeMaxAllocatable < allocatable.Value() {
nodeMaxAllocatable = allocatable.Value()
}
}
WaitForStableCluster(cs, workerNodes)
pods, err := cs.CoreV1().Pods(metav1.NamespaceAll).List(ctx, metav1.ListOptions{})
framework.ExpectNoError(err)
for _, pod := range pods.Items {
_, found := nodeToAllocatableMap[pod.Spec.NodeName]
if found && pod.Status.Phase != v1.PodSucceeded && pod.Status.Phase != v1.PodFailed {
framework.Logf("Pod %v requesting local ephemeral resource =%v on Node %v", pod.Name, getRequestedStorageEphemeralStorage(pod), pod.Spec.NodeName)
nodeToAllocatableMap[pod.Spec.NodeName] -= getRequestedStorageEphemeralStorage(pod)
}
}
var podsNeededForSaturation int
ephemeralStoragePerPod := nodeMaxAllocatable / maxNumberOfPods
framework.Logf("Using pod capacity: %v", ephemeralStoragePerPod)
for name, leftAllocatable := range nodeToAllocatableMap {
framework.Logf("Node: %v has local ephemeral resource allocatable: %v", name, leftAllocatable)
podsNeededForSaturation += (int)(leftAllocatable / ephemeralStoragePerPod)
}
ginkgo.By(fmt.Sprintf("Starting additional %v Pods to fully saturate the cluster local ephemeral resource and trying to start another one", podsNeededForSaturation))
// As the pods are distributed randomly among nodes,
// it can easily happen that all nodes are saturated
// and there is no need to create additional pods.
// StartPods requires at least one pod to replicate.
if podsNeededForSaturation > 0 {
framework.ExpectNoError(testutils.StartPods(cs, podsNeededForSaturation, ns, "overcommit",
*initPausePod(f, pausePodConfig{
Name: "",
Labels: map[string]string{"name": ""},
Resources: &v1.ResourceRequirements{
Limits: v1.ResourceList{
v1.ResourceEphemeralStorage: *resource.NewQuantity(ephemeralStoragePerPod, "DecimalSI"),
},
Requests: v1.ResourceList{
v1.ResourceEphemeralStorage: *resource.NewQuantity(ephemeralStoragePerPod, "DecimalSI"),
},
},
}), true, framework.Logf))
}
podName := "additional-pod"
conf := pausePodConfig{
Name: podName,
Labels: map[string]string{"name": "additional"},
Resources: &v1.ResourceRequirements{
Limits: v1.ResourceList{
v1.ResourceEphemeralStorage: *resource.NewQuantity(ephemeralStoragePerPod, "DecimalSI"),
},
Requests: v1.ResourceList{
v1.ResourceEphemeralStorage: *resource.NewQuantity(ephemeralStoragePerPod, "DecimalSI"),
},
},
}
WaitForSchedulerAfterAction(ctx, f, createPausePodAction(f, conf), ns, podName, false)
verifyResult(ctx, cs, podsNeededForSaturation, 1, ns)
})
// This test verifies we don't allow scheduling of pods in a way that sum of limits +
// associated overhead is greater than machine's capacity.
// It assumes that cluster add-on pods stay stable and cannot be run in parallel
// with any other test that touches Nodes or Pods.
// Because of this we need to have precise control on what's running in the cluster.
// Test scenario:
// 1. Find the first ready node on the system, and add a fake resource for test
// 2. Create one with affinity to the particular node that uses 70% of the fake resource.
// 3. Wait for the pod to be scheduled.
// 4. Create another pod with affinity to the particular node that needs 20% of the fake resource and
// an overhead set as 25% of the fake resource.
// 5. Make sure this additional pod is not scheduled.
ginkgo.Context("validates pod overhead is considered along with resource limits of pods that are allowed to run", func() {
var testNodeName string
var handler string
var beardsecond v1.ResourceName = "example.com/beardsecond"
ginkgo.BeforeEach(func(ctx context.Context) {
WaitForStableCluster(cs, workerNodes)
ginkgo.By("Add RuntimeClass and fake resource")
// find a node which can run a pod:
testNodeName = GetNodeThatCanRunPod(ctx, f)
// Get node object:
node, err := cs.CoreV1().Nodes().Get(ctx, testNodeName, metav1.GetOptions{})
framework.ExpectNoError(err, "unable to get node object for node %v", testNodeName)
// update Node API object with a fake resource
nodeCopy := node.DeepCopy()
nodeCopy.ResourceVersion = "0"
nodeCopy.Status.Capacity[beardsecond] = resource.MustParse("1000")
_, err = cs.CoreV1().Nodes().UpdateStatus(ctx, nodeCopy, metav1.UpdateOptions{})
framework.ExpectNoError(err, "unable to apply fake resource to %v", testNodeName)
// Register a runtimeClass with overhead set as 25% of the available beard-seconds
handler = e2eruntimeclass.PreconfiguredRuntimeClassHandler
rc := &nodev1.RuntimeClass{
ObjectMeta: metav1.ObjectMeta{Name: handler},
Handler: handler,
Overhead: &nodev1.Overhead{
PodFixed: v1.ResourceList{
beardsecond: resource.MustParse("250"),
},
},
}
_, err = cs.NodeV1().RuntimeClasses().Create(ctx, rc, metav1.CreateOptions{})
framework.ExpectNoError(err, "failed to create RuntimeClass resource")
})
ginkgo.AfterEach(func(ctx context.Context) {
ginkgo.By("Remove fake resource and RuntimeClass")
// remove fake resource:
if testNodeName != "" {
// Get node object:
node, err := cs.CoreV1().Nodes().Get(ctx, testNodeName, metav1.GetOptions{})
framework.ExpectNoError(err, "unable to get node object for node %v", testNodeName)
nodeCopy := node.DeepCopy()
// force it to update
nodeCopy.ResourceVersion = "0"
delete(nodeCopy.Status.Capacity, beardsecond)
_, err = cs.CoreV1().Nodes().UpdateStatus(ctx, nodeCopy, metav1.UpdateOptions{})
framework.ExpectNoError(err, "unable to update node %v", testNodeName)
}
// remove RuntimeClass
_ = cs.NodeV1().RuntimeClasses().Delete(ctx, e2eruntimeclass.PreconfiguredRuntimeClassHandler, metav1.DeleteOptions{})
})
ginkgo.It("verify pod overhead is accounted for", func(ctx context.Context) {
if testNodeName == "" {
framework.Fail("unable to find a node which can run a pod")
}
ginkgo.By("Starting Pod to consume most of the node's resource.")
// Create pod which requires 70% of the available beard-seconds.
fillerPod := createPausePod(ctx, f, pausePodConfig{
Name: "filler-pod-" + string(uuid.NewUUID()),
Resources: &v1.ResourceRequirements{
Requests: v1.ResourceList{beardsecond: resource.MustParse("700")},
Limits: v1.ResourceList{beardsecond: resource.MustParse("700")},
},
})
// Wait for filler pod to schedule.
framework.ExpectNoError(e2epod.WaitForPodRunningInNamespace(ctx, cs, fillerPod))
ginkgo.By("Creating another pod that requires unavailable amount of resources.")
// Create another pod that requires 20% of available beard-seconds, but utilizes the RuntimeClass
// which defines a pod overhead that requires an additional 25%.
// This pod should remain pending as at least 70% of beard-second in
// the node are already consumed.
podName := "additional-pod" + string(uuid.NewUUID())
conf := pausePodConfig{
RuntimeClassHandler: &handler,
Name: podName,
Labels: map[string]string{"name": "additional"},
Resources: &v1.ResourceRequirements{
Limits: v1.ResourceList{beardsecond: resource.MustParse("200")},
},
}
WaitForSchedulerAfterAction(ctx, f, createPausePodAction(f, conf), ns, podName, false)
verifyResult(ctx, cs, 1, 1, ns)
})
})
// This test verifies we don't allow scheduling of pods in a way that sum of
// resource requests of pods is greater than machines capacity.
// It assumes that cluster add-on pods stay stable and cannot be run in parallel
// with any other test that touches Nodes or Pods.
// It is so because we need to have precise control on what's running in the cluster.
// Test scenario:
// 1. Find the amount CPU resources on each node.
// 2. Create one pod with affinity to each node that uses 70% of the node CPU.
// 3. Wait for the pods to be scheduled.
// 4. Create another pod with no affinity to any node that need 50% of the largest node CPU.
// 5. Make sure this additional pod is not scheduled.
/*
Release: v1.9
Testname: Scheduler, resource limits
Description: Scheduling Pods MUST fail if the resource requests exceed Machine capacity.
*/
framework.ConformanceIt("validates resource limits of pods that are allowed to run", func(ctx context.Context) {
WaitForStableCluster(cs, workerNodes)
nodeMaxAllocatable := int64(0)
nodeToAllocatableMap := make(map[string]int64)
for _, node := range nodeList.Items {
nodeReady := false
for _, condition := range node.Status.Conditions {
if condition.Type == v1.NodeReady && condition.Status == v1.ConditionTrue {
nodeReady = true
break
}
}
if !nodeReady {
continue
}
// Apply node label to each node
e2enode.AddOrUpdateLabelOnNode(cs, node.Name, "node", node.Name)
e2enode.ExpectNodeHasLabel(ctx, cs, node.Name, "node", node.Name)
// Find allocatable amount of CPU.
allocatable, found := node.Status.Allocatable[v1.ResourceCPU]
if !found {
framework.Failf("node.Status.Allocatable %v does not contain entry %v", node.Status.Allocatable, v1.ResourceCPU)
}
nodeToAllocatableMap[node.Name] = allocatable.MilliValue()
if nodeMaxAllocatable < allocatable.MilliValue() {
nodeMaxAllocatable = allocatable.MilliValue()
}
}
// Clean up added labels after this test.
defer func() {
for nodeName := range nodeToAllocatableMap {
e2enode.RemoveLabelOffNode(cs, nodeName, "node")
}
}()
pods, err := cs.CoreV1().Pods(metav1.NamespaceAll).List(ctx, metav1.ListOptions{})
framework.ExpectNoError(err)
for _, pod := range pods.Items {
_, found := nodeToAllocatableMap[pod.Spec.NodeName]
if found && pod.Status.Phase != v1.PodSucceeded && pod.Status.Phase != v1.PodFailed {
framework.Logf("Pod %v requesting resource cpu=%vm on Node %v", pod.Name, getRequestedCPU(pod), pod.Spec.NodeName)
nodeToAllocatableMap[pod.Spec.NodeName] -= getRequestedCPU(pod)
}
}
ginkgo.By("Starting Pods to consume most of the cluster CPU.")
// Create one pod per node that requires 70% of the node remaining CPU.
fillerPods := []*v1.Pod{}
for nodeName, cpu := range nodeToAllocatableMap {
requestedCPU := cpu * 7 / 10
framework.Logf("Creating a pod which consumes cpu=%vm on Node %v", requestedCPU, nodeName)
fillerPods = append(fillerPods, createPausePod(ctx, f, pausePodConfig{
Name: "filler-pod-" + string(uuid.NewUUID()),
Resources: &v1.ResourceRequirements{
Limits: v1.ResourceList{
v1.ResourceCPU: *resource.NewMilliQuantity(requestedCPU, "DecimalSI"),
},
Requests: v1.ResourceList{
v1.ResourceCPU: *resource.NewMilliQuantity(requestedCPU, "DecimalSI"),
},
},
Affinity: &v1.Affinity{
NodeAffinity: &v1.NodeAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
NodeSelectorTerms: []v1.NodeSelectorTerm{
{
MatchExpressions: []v1.NodeSelectorRequirement{
{
Key: "node",
Operator: v1.NodeSelectorOpIn,
Values: []string{nodeName},
},
},
},
},
},
},
},
}))
}
// Wait for filler pods to schedule.
for _, pod := range fillerPods {
framework.ExpectNoError(e2epod.WaitForPodRunningInNamespace(ctx, cs, pod))
}
ginkgo.By("Creating another pod that requires unavailable amount of CPU.")
// Create another pod that requires 50% of the largest node CPU resources.
// This pod should remain pending as at least 70% of CPU of other nodes in
// the cluster are already consumed.
podName := "additional-pod"
conf := pausePodConfig{
Name: podName,
Labels: map[string]string{"name": "additional"},
Resources: &v1.ResourceRequirements{
Limits: v1.ResourceList{
v1.ResourceCPU: *resource.NewMilliQuantity(nodeMaxAllocatable*5/10, "DecimalSI"),
},
Requests: v1.ResourceList{
v1.ResourceCPU: *resource.NewMilliQuantity(nodeMaxAllocatable*5/10, "DecimalSI"),
},
},
}
WaitForSchedulerAfterAction(ctx, f, createPausePodAction(f, conf), ns, podName, false)
verifyResult(ctx, cs, len(fillerPods), 1, ns)
})
// Test Nodes does not have any label, hence it should be impossible to schedule Pod with
// nonempty Selector set.
/*
Release: v1.9
Testname: Scheduler, node selector not matching
Description: Create a Pod with a NodeSelector set to a value that does not match a node in the cluster. Since there are no nodes matching the criteria the Pod MUST not be scheduled.
*/
framework.ConformanceIt("validates that NodeSelector is respected if not matching", func(ctx context.Context) {
ginkgo.By("Trying to schedule Pod with nonempty NodeSelector.")
podName := "restricted-pod"
WaitForStableCluster(cs, workerNodes)
conf := pausePodConfig{
Name: podName,
Labels: map[string]string{"name": "restricted"},
NodeSelector: map[string]string{
"label": "nonempty",
},
}
WaitForSchedulerAfterAction(ctx, f, createPausePodAction(f, conf), ns, podName, false)
verifyResult(ctx, cs, 0, 1, ns)
})
/*
Release: v1.9
Testname: Scheduler, node selector matching
Description: Create a label on the node {k: v}. Then create a Pod with a NodeSelector set to {k: v}. Check to see if the Pod is scheduled. When the NodeSelector matches then Pod MUST be scheduled on that node.
*/
framework.ConformanceIt("validates that NodeSelector is respected if matching", func(ctx context.Context) {
nodeName := GetNodeThatCanRunPod(ctx, f)
ginkgo.By("Trying to apply a random label on the found node.")
k := fmt.Sprintf("kubernetes.io/e2e-%s", string(uuid.NewUUID()))
v := "42"
e2enode.AddOrUpdateLabelOnNode(cs, nodeName, k, v)
e2enode.ExpectNodeHasLabel(ctx, cs, nodeName, k, v)
defer e2enode.RemoveLabelOffNode(cs, nodeName, k)
ginkgo.By("Trying to relaunch the pod, now with labels.")
labelPodName := "with-labels"
createPausePod(ctx, f, pausePodConfig{
Name: labelPodName,
NodeSelector: map[string]string{
k: v,
},
})
// check that pod got scheduled. We intentionally DO NOT check that the
// pod is running because this will create a race condition with the
// kubelet and the scheduler: the scheduler might have scheduled a pod
// already when the kubelet does not know about its new label yet. The
// kubelet will then refuse to launch the pod.
framework.ExpectNoError(e2epod.WaitForPodNotPending(ctx, cs, ns, labelPodName))
labelPod, err := cs.CoreV1().Pods(ns).Get(ctx, labelPodName, metav1.GetOptions{})
framework.ExpectNoError(err)
gomega.Expect(labelPod.Spec.NodeName).To(gomega.Equal(nodeName))
})
// Test Nodes does not have any label, hence it should be impossible to schedule Pod with
// non-nil NodeAffinity.RequiredDuringSchedulingIgnoredDuringExecution.
ginkgo.It("validates that NodeAffinity is respected if not matching", func(ctx context.Context) {
ginkgo.By("Trying to schedule Pod with nonempty NodeSelector.")
podName := "restricted-pod"
WaitForStableCluster(cs, workerNodes)
conf := pausePodConfig{
Name: podName,
Affinity: &v1.Affinity{
NodeAffinity: &v1.NodeAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
NodeSelectorTerms: []v1.NodeSelectorTerm{
{
MatchExpressions: []v1.NodeSelectorRequirement{
{
Key: "foo",
Operator: v1.NodeSelectorOpIn,
Values: []string{"bar", "value2"},
},
},
}, {
MatchExpressions: []v1.NodeSelectorRequirement{
{
Key: "diffkey",
Operator: v1.NodeSelectorOpIn,
Values: []string{"wrong", "value2"},
},
},
},
},
},
},
},
Labels: map[string]string{"name": "restricted"},
}
WaitForSchedulerAfterAction(ctx, f, createPausePodAction(f, conf), ns, podName, false)
verifyResult(ctx, cs, 0, 1, ns)
})
// Keep the same steps with the test on NodeSelector,
// but specify Affinity in Pod.Spec.Affinity, instead of NodeSelector.
ginkgo.It("validates that required NodeAffinity setting is respected if matching", func(ctx context.Context) {
nodeName := GetNodeThatCanRunPod(ctx, f)
ginkgo.By("Trying to apply a random label on the found node.")
k := fmt.Sprintf("kubernetes.io/e2e-%s", string(uuid.NewUUID()))
v := "42"
e2enode.AddOrUpdateLabelOnNode(cs, nodeName, k, v)
e2enode.ExpectNodeHasLabel(ctx, cs, nodeName, k, v)
defer e2enode.RemoveLabelOffNode(cs, nodeName, k)
ginkgo.By("Trying to relaunch the pod, now with labels.")
labelPodName := "with-labels"
createPausePod(ctx, f, pausePodConfig{
Name: labelPodName,
Affinity: &v1.Affinity{
NodeAffinity: &v1.NodeAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
NodeSelectorTerms: []v1.NodeSelectorTerm{
{
MatchExpressions: []v1.NodeSelectorRequirement{
{
Key: k,
Operator: v1.NodeSelectorOpIn,
Values: []string{v},
},
},
},
},
},
},
},
})
// check that pod got scheduled. We intentionally DO NOT check that the
// pod is running because this will create a race condition with the
// kubelet and the scheduler: the scheduler might have scheduled a pod
// already when the kubelet does not know about its new label yet. The
// kubelet will then refuse to launch the pod.
framework.ExpectNoError(e2epod.WaitForPodNotPending(ctx, cs, ns, labelPodName))
labelPod, err := cs.CoreV1().Pods(ns).Get(ctx, labelPodName, metav1.GetOptions{})
framework.ExpectNoError(err)
gomega.Expect(labelPod.Spec.NodeName).To(gomega.Equal(nodeName))
})
// 1. Run a pod to get an available node, then delete the pod
// 2. Taint the node with a random taint
// 3. Try to relaunch the pod with tolerations tolerate the taints on node,
// and the pod's nodeName specified to the name of node found in step 1
ginkgo.It("validates that taints-tolerations is respected if matching", func(ctx context.Context) {
nodeName := getNodeThatCanRunPodWithoutToleration(ctx, f)
ginkgo.By("Trying to apply a random taint on the found node.")
testTaint := v1.Taint{
Key: fmt.Sprintf("kubernetes.io/e2e-taint-key-%s", string(uuid.NewUUID())),
Value: "testing-taint-value",
Effect: v1.TaintEffectNoSchedule,
}
e2enode.AddOrUpdateTaintOnNode(ctx, cs, nodeName, testTaint)
e2enode.ExpectNodeHasTaint(ctx, cs, nodeName, &testTaint)
ginkgo.DeferCleanup(e2enode.RemoveTaintOffNode, cs, nodeName, testTaint)
ginkgo.By("Trying to apply a random label on the found node.")
labelKey := fmt.Sprintf("kubernetes.io/e2e-label-key-%s", string(uuid.NewUUID()))
labelValue := "testing-label-value"
e2enode.AddOrUpdateLabelOnNode(cs, nodeName, labelKey, labelValue)
e2enode.ExpectNodeHasLabel(ctx, cs, nodeName, labelKey, labelValue)
defer e2enode.RemoveLabelOffNode(cs, nodeName, labelKey)
ginkgo.By("Trying to relaunch the pod, now with tolerations.")
tolerationPodName := "with-tolerations"
createPausePod(ctx, f, pausePodConfig{
Name: tolerationPodName,
Tolerations: []v1.Toleration{{Key: testTaint.Key, Value: testTaint.Value, Effect: testTaint.Effect}},
NodeSelector: map[string]string{labelKey: labelValue},
})
// check that pod got scheduled. We intentionally DO NOT check that the
// pod is running because this will create a race condition with the
// kubelet and the scheduler: the scheduler might have scheduled a pod
// already when the kubelet does not know about its new taint yet. The
// kubelet will then refuse to launch the pod.
framework.ExpectNoError(e2epod.WaitForPodNotPending(ctx, cs, ns, tolerationPodName))
deployedPod, err := cs.CoreV1().Pods(ns).Get(ctx, tolerationPodName, metav1.GetOptions{})
framework.ExpectNoError(err)
gomega.Expect(deployedPod.Spec.NodeName).To(gomega.Equal(nodeName))
})
// 1. Run a pod to get an available node, then delete the pod
// 2. Taint the node with a random taint
// 3. Try to relaunch the pod still no tolerations,
// and the pod's nodeName specified to the name of node found in step 1
ginkgo.It("validates that taints-tolerations is respected if not matching", func(ctx context.Context) {
nodeName := getNodeThatCanRunPodWithoutToleration(ctx, f)
ginkgo.By("Trying to apply a random taint on the found node.")
testTaint := v1.Taint{
Key: fmt.Sprintf("kubernetes.io/e2e-taint-key-%s", string(uuid.NewUUID())),
Value: "testing-taint-value",
Effect: v1.TaintEffectNoSchedule,
}
e2enode.AddOrUpdateTaintOnNode(ctx, cs, nodeName, testTaint)
e2enode.ExpectNodeHasTaint(ctx, cs, nodeName, &testTaint)
ginkgo.DeferCleanup(e2enode.RemoveTaintOffNode, cs, nodeName, testTaint)
ginkgo.By("Trying to apply a random label on the found node.")
labelKey := fmt.Sprintf("kubernetes.io/e2e-label-key-%s", string(uuid.NewUUID()))
labelValue := "testing-label-value"
e2enode.AddOrUpdateLabelOnNode(cs, nodeName, labelKey, labelValue)
e2enode.ExpectNodeHasLabel(ctx, cs, nodeName, labelKey, labelValue)
defer e2enode.RemoveLabelOffNode(cs, nodeName, labelKey)
ginkgo.By("Trying to relaunch the pod, still no tolerations.")
podNameNoTolerations := "still-no-tolerations"
conf := pausePodConfig{
Name: podNameNoTolerations,
NodeSelector: map[string]string{labelKey: labelValue},
}
WaitForSchedulerAfterAction(ctx, f, createPausePodAction(f, conf), ns, podNameNoTolerations, false)
verifyResult(ctx, cs, 0, 1, ns)
ginkgo.By("Removing taint off the node")
WaitForSchedulerAfterAction(ctx, f, removeTaintFromNodeAction(cs, nodeName, testTaint), ns, podNameNoTolerations, true)
verifyResult(ctx, cs, 1, 0, ns)
})
ginkgo.It("validates that there is no conflict between pods with same hostPort but different hostIP and protocol", func(ctx context.Context) {
nodeName := GetNodeThatCanRunPod(ctx, f)
localhost := "127.0.0.1"
if framework.TestContext.ClusterIsIPv6() {
localhost = "::1"
}
hostIP := getNodeHostIP(ctx, f, nodeName)
// use nodeSelector to make sure the testing pods get assigned on the same node to explicitly verify there exists conflict or not
ginkgo.By("Trying to apply a random label on the found node.")
k := fmt.Sprintf("kubernetes.io/e2e-%s", string(uuid.NewUUID()))
v := "90"
nodeSelector := make(map[string]string)
nodeSelector[k] = v
e2enode.AddOrUpdateLabelOnNode(cs, nodeName, k, v)
e2enode.ExpectNodeHasLabel(ctx, cs, nodeName, k, v)
defer e2enode.RemoveLabelOffNode(cs, nodeName, k)
port := int32(54321)
ginkgo.By(fmt.Sprintf("Trying to create a pod(pod1) with hostport %v and hostIP %s and expect scheduled", port, localhost))
createHostPortPodOnNode(ctx, f, "pod1", ns, localhost, port, v1.ProtocolTCP, nodeSelector, true)
ginkgo.By(fmt.Sprintf("Trying to create another pod(pod2) with hostport %v but hostIP %s on the node which pod1 resides and expect scheduled", port, hostIP))
createHostPortPodOnNode(ctx, f, "pod2", ns, hostIP, port, v1.ProtocolTCP, nodeSelector, true)
ginkgo.By(fmt.Sprintf("Trying to create a third pod(pod3) with hostport %v, hostIP %s but use UDP protocol on the node which pod2 resides", port, hostIP))
createHostPortPodOnNode(ctx, f, "pod3", ns, hostIP, port, v1.ProtocolUDP, nodeSelector, true)
})
/*
Release: v1.16
Testname: Scheduling, HostPort and Protocol match, HostIPs different but one is default HostIP (0.0.0.0)
Description: Pods with the same HostPort and Protocol, but different HostIPs, MUST NOT schedule to the
same node if one of those IPs is the default HostIP of 0.0.0.0, which represents all IPs on the host.
*/
framework.ConformanceIt("validates that there exists conflict between pods with same hostPort and protocol but one using 0.0.0.0 hostIP", func(ctx context.Context) {
nodeName := GetNodeThatCanRunPod(ctx, f)
hostIP := getNodeHostIP(ctx, f, nodeName)
// use nodeSelector to make sure the testing pods get assigned on the same node to explicitly verify there exists conflict or not
ginkgo.By("Trying to apply a random label on the found node.")
k := fmt.Sprintf("kubernetes.io/e2e-%s", string(uuid.NewUUID()))
v := "95"
nodeSelector := make(map[string]string)
nodeSelector[k] = v
e2enode.AddOrUpdateLabelOnNode(cs, nodeName, k, v)
e2enode.ExpectNodeHasLabel(ctx, cs, nodeName, k, v)
defer e2enode.RemoveLabelOffNode(cs, nodeName, k)
port := int32(54322)
ginkgo.By(fmt.Sprintf("Trying to create a pod(pod4) with hostport %v and hostIP 0.0.0.0(empty string here) and expect scheduled", port))
createHostPortPodOnNode(ctx, f, "pod4", ns, "", port, v1.ProtocolTCP, nodeSelector, true)
ginkgo.By(fmt.Sprintf("Trying to create another pod(pod5) with hostport %v but hostIP %s on the node which pod4 resides and expect not scheduled", port, hostIP))
createHostPortPodOnNode(ctx, f, "pod5", ns, hostIP, port, v1.ProtocolTCP, nodeSelector, false)
})
ginkgo.Context("PodTopologySpread Filtering", func() {
var nodeNames []string
topologyKey := "kubernetes.io/e2e-pts-filter"
ginkgo.BeforeEach(func(ctx context.Context) {
if len(nodeList.Items) < 2 {
ginkgo.Skip("At least 2 nodes are required to run the test")
}
ginkgo.By("Trying to get 2 available nodes which can run pod")
nodeNames = Get2NodesThatCanRunPod(ctx, f)
ginkgo.By(fmt.Sprintf("Apply dedicated topologyKey %v for this test on the 2 nodes.", topologyKey))
for _, nodeName := range nodeNames {
e2enode.AddOrUpdateLabelOnNode(cs, nodeName, topologyKey, nodeName)
}
})
ginkgo.AfterEach(func() {
for _, nodeName := range nodeNames {
e2enode.RemoveLabelOffNode(cs, nodeName, topologyKey)
}
})
ginkgo.It("validates 4 pods with MaxSkew=1 are evenly distributed into 2 nodes", func(ctx context.Context) {
podLabel := "e2e-pts-filter"
replicas := 4
rsConfig := pauseRSConfig{
Replicas: int32(replicas),
PodConfig: pausePodConfig{
Name: podLabel,
Namespace: ns,
Labels: map[string]string{podLabel: ""},
Affinity: &v1.Affinity{
NodeAffinity: &v1.NodeAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
NodeSelectorTerms: []v1.NodeSelectorTerm{
{
MatchExpressions: []v1.NodeSelectorRequirement{
{
Key: topologyKey,
Operator: v1.NodeSelectorOpIn,
Values: nodeNames,
},
},
},
},
},
},
},
TopologySpreadConstraints: []v1.TopologySpreadConstraint{
{
MaxSkew: 1,
TopologyKey: topologyKey,
WhenUnsatisfiable: v1.DoNotSchedule,
LabelSelector: &metav1.LabelSelector{
MatchExpressions: []metav1.LabelSelectorRequirement{
{
Key: podLabel,
Operator: metav1.LabelSelectorOpExists,
},
},
},
},
},
},
}
runPauseRS(ctx, f, rsConfig)
podList, err := cs.CoreV1().Pods(ns).List(ctx, metav1.ListOptions{})
framework.ExpectNoError(err)
numInNode1, numInNode2 := 0, 0
for _, pod := range podList.Items {
if pod.Spec.NodeName == nodeNames[0] {
numInNode1++
} else if pod.Spec.NodeName == nodeNames[1] {
numInNode2++
}
}
expected := replicas / len(nodeNames)
gomega.Expect(numInNode1).To(gomega.Equal(expected), fmt.Sprintf("Pods are not distributed as expected on node %q", nodeNames[0]))
gomega.Expect(numInNode2).To(gomega.Equal(expected), fmt.Sprintf("Pods are not distributed as expected on node %q", nodeNames[1]))
})
})
ginkgo.It("validates Pods with non-empty schedulingGates are blocked on scheduling", func(ctx context.Context) {
podLabel := "e2e-scheduling-gates"
replicas := 3
ginkgo.By(fmt.Sprintf("Creating a ReplicaSet with replicas=%v, carrying scheduling gates [foo bar]", replicas))
rsConfig := pauseRSConfig{
Replicas: int32(replicas),
PodConfig: pausePodConfig{
Name: podLabel,
Namespace: ns,
Labels: map[string]string{podLabel: ""},
SchedulingGates: []v1.PodSchedulingGate{
{Name: "foo"},
{Name: "bar"},
},
},
}
createPauseRS(ctx, f, rsConfig)
ginkgo.By("Expect all pods stay in pending state")
podList, err := e2epod.WaitForNumberOfPods(ctx, cs, ns, replicas, time.Minute)
framework.ExpectNoError(err)
framework.ExpectNoError(e2epod.WaitForPodsSchedulingGated(ctx, cs, ns, replicas, time.Minute))
ginkgo.By("Remove one scheduling gate")
want := []v1.PodSchedulingGate{{Name: "bar"}}
var pods []*v1.Pod
for _, pod := range podList.Items {
clone := pod.DeepCopy()
clone.Spec.SchedulingGates = want
live, err := patchPod(cs, &pod, clone)
framework.ExpectNoError(err)
pods = append(pods, live)
}
ginkgo.By("Expect all pods carry one scheduling gate and are still in pending state")
framework.ExpectNoError(e2epod.WaitForPodsWithSchedulingGates(ctx, cs, ns, replicas, time.Minute, want))
framework.ExpectNoError(e2epod.WaitForPodsSchedulingGated(ctx, cs, ns, replicas, time.Minute))
ginkgo.By("Remove the remaining scheduling gates")
for _, pod := range pods {
clone := pod.DeepCopy()
clone.Spec.SchedulingGates = nil
_, err := patchPod(cs, pod, clone)
framework.ExpectNoError(err)
}
ginkgo.By("Expect all pods are scheduled and running")
framework.ExpectNoError(e2epod.WaitForPodsRunning(ctx, cs, ns, replicas, time.Minute))
})
})
func patchPod(cs clientset.Interface, old, new *v1.Pod) (*v1.Pod, error) {
oldData, err := json.Marshal(old)
if err != nil {
return nil, err
}
newData, err := json.Marshal(new)
if err != nil {
return nil, err
}
patchBytes, err := strategicpatch.CreateTwoWayMergePatch(oldData, newData, &v1.Pod{})
if err != nil {
return nil, fmt.Errorf("failed to create merge patch for Pod %q: %w", old.Name, err)
}
return cs.CoreV1().Pods(new.Namespace).Patch(context.TODO(), new.Name, types.StrategicMergePatchType, patchBytes, metav1.PatchOptions{})
}
// printAllPodsOnNode outputs status of all kubelet pods into log.
func printAllPodsOnNode(ctx context.Context, c clientset.Interface, nodeName string) {
podList, err := c.CoreV1().Pods(metav1.NamespaceAll).List(ctx, metav1.ListOptions{FieldSelector: "spec.nodeName=" + nodeName})
if err != nil {
framework.Logf("Unable to retrieve pods for node %v: %v", nodeName, err)
return
}
for _, p := range podList.Items {
framework.Logf("%v from %v started at %v (%d container statuses recorded)", p.Name, p.Namespace, p.Status.StartTime, len(p.Status.ContainerStatuses))
for _, c := range p.Status.ContainerStatuses {
framework.Logf("\tContainer %v ready: %v, restart count %v",
c.Name, c.Ready, c.RestartCount)
}
}
}
func initPausePod(f *framework.Framework, conf pausePodConfig) *v1.Pod {
var gracePeriod = int64(1)
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: conf.Name,
Namespace: conf.Namespace,
Labels: map[string]string{},
Annotations: map[string]string{},
OwnerReferences: conf.OwnerReferences,
Finalizers: conf.Finalizers,
},
Spec: v1.PodSpec{
SecurityContext: e2epod.GetRestrictedPodSecurityContext(),
NodeSelector: conf.NodeSelector,
Affinity: conf.Affinity,
TopologySpreadConstraints: conf.TopologySpreadConstraints,
RuntimeClassName: conf.RuntimeClassHandler,
Containers: []v1.Container{
{
Name: conf.Name,
Image: imageutils.GetPauseImageName(),
Ports: conf.Ports,
SecurityContext: e2epod.GetRestrictedContainerSecurityContext(),
},
},
Tolerations: conf.Tolerations,
PriorityClassName: conf.PriorityClassName,
TerminationGracePeriodSeconds: &gracePeriod,
SchedulingGates: conf.SchedulingGates,
},
}
for key, value := range conf.Labels {
pod.ObjectMeta.Labels[key] = value
}
for key, value := range conf.Annotations {
pod.ObjectMeta.Annotations[key] = value
}
// TODO: setting the Pod's nodeAffinity instead of setting .spec.nodeName works around the
// Preemption e2e flake (#88441), but we should investigate deeper to get to the bottom of it.
if len(conf.NodeName) != 0 {
e2epod.SetNodeAffinity(&pod.Spec, conf.NodeName)
}
if conf.Resources != nil {
pod.Spec.Containers[0].Resources = *conf.Resources
}
if conf.DeletionGracePeriodSeconds != nil {
pod.ObjectMeta.DeletionGracePeriodSeconds = conf.DeletionGracePeriodSeconds
}
return pod
}
func createPausePod(ctx context.Context, f *framework.Framework, conf pausePodConfig) *v1.Pod {
namespace := conf.Namespace
if len(namespace) == 0 {
namespace = f.Namespace.Name
}
pod, err := f.ClientSet.CoreV1().Pods(namespace).Create(ctx, initPausePod(f, conf), metav1.CreateOptions{})
framework.ExpectNoError(err)
return pod
}
func runPausePod(ctx context.Context, f *framework.Framework, conf pausePodConfig) *v1.Pod {
pod := createPausePod(ctx, f, conf)
framework.ExpectNoError(e2epod.WaitTimeoutForPodRunningInNamespace(ctx, f.ClientSet, pod.Name, pod.Namespace, f.Timeouts.PodStartShort))
pod, err := f.ClientSet.CoreV1().Pods(pod.Namespace).Get(ctx, conf.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
return pod
}
func runPodAndGetNodeName(ctx context.Context, f *framework.Framework, conf pausePodConfig) string {
// launch a pod to find a node which can launch a pod. We intentionally do
// not just take the node list and choose the first of them. Depending on the
// cluster and the scheduler it might be that a "normal" pod cannot be
// scheduled onto it.
pod := runPausePod(ctx, f, conf)
ginkgo.By("Explicitly delete pod here to free the resource it takes.")
err := f.ClientSet.CoreV1().Pods(f.Namespace.Name).Delete(ctx, pod.Name, *metav1.NewDeleteOptions(0))
framework.ExpectNoError(err)
return pod.Spec.NodeName
}
func getRequestedCPU(pod v1.Pod) int64 {
var result int64
for _, container := range pod.Spec.Containers {
result += container.Resources.Requests.Cpu().MilliValue()
}
return result
}
func getRequestedStorageEphemeralStorage(pod v1.Pod) int64 {
var result int64
for _, container := range pod.Spec.Containers {
result += container.Resources.Requests.StorageEphemeral().Value()
}
return result
}
// removeTaintFromNodeAction returns a closure that removes the given taint
// from the given node upon invocation.
func removeTaintFromNodeAction(cs clientset.Interface, nodeName string, testTaint v1.Taint) Action {
return func(ctx context.Context) error {
e2enode.RemoveTaintOffNode(ctx, cs, nodeName, testTaint)
return nil
}