forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 1
/
stateful_pod_control_test.go
446 lines (420 loc) · 17.5 KB
/
stateful_pod_control_test.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
/*
Copyright 2016 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 statefulset
import (
"errors"
"strings"
"testing"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
core "k8s.io/client-go/testing"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/kubernetes/pkg/api/v1"
"k8s.io/kubernetes/pkg/client/clientset_generated/clientset/fake"
corelisters "k8s.io/kubernetes/pkg/client/listers/core/v1"
)
func TestStatefulPodControlCreatesPods(t *testing.T) {
recorder := record.NewFakeRecorder(10)
set := newStatefulSet(3)
pod := newStatefulSetPod(set, 0)
fakeClient := &fake.Clientset{}
pvcIndexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
pvcLister := corelisters.NewPersistentVolumeClaimLister(pvcIndexer)
control := NewRealStatefulPodControl(fakeClient, nil, nil, pvcLister, recorder)
fakeClient.AddReactor("get", "persistentvolumeclaims", func(action core.Action) (bool, runtime.Object, error) {
return true, nil, apierrors.NewNotFound(action.GetResource().GroupResource(), action.GetResource().Resource)
})
fakeClient.AddReactor("create", "persistentvolumeclaims", func(action core.Action) (bool, runtime.Object, error) {
create := action.(core.CreateAction)
return true, create.GetObject(), nil
})
fakeClient.AddReactor("create", "pods", func(action core.Action) (bool, runtime.Object, error) {
create := action.(core.CreateAction)
return true, create.GetObject(), nil
})
if err := control.CreateStatefulPod(set, pod); err != nil {
t.Errorf("StatefulPodControl failed to create Pod error: %s", err)
}
events := collectEvents(recorder.Events)
if eventCount := len(events); eventCount != 2 {
t.Errorf("Expected 2 events for successful create found %d", eventCount)
}
for i := range events {
if !strings.Contains(events[i], v1.EventTypeNormal) {
t.Errorf("Expected normal events found %s", events[i])
}
}
}
func TestStatefulPodControlCreatePodExists(t *testing.T) {
recorder := record.NewFakeRecorder(10)
set := newStatefulSet(3)
pod := newStatefulSetPod(set, 0)
fakeClient := &fake.Clientset{}
pvcs := getPersistentVolumeClaims(set, pod)
pvcIndexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
for k := range pvcs {
pvc := pvcs[k]
pvcIndexer.Add(&pvc)
}
pvcLister := corelisters.NewPersistentVolumeClaimLister(pvcIndexer)
control := NewRealStatefulPodControl(fakeClient, nil, nil, pvcLister, recorder)
fakeClient.AddReactor("create", "persistentvolumeclaims", func(action core.Action) (bool, runtime.Object, error) {
create := action.(core.CreateAction)
return true, create.GetObject(), nil
})
fakeClient.AddReactor("create", "pods", func(action core.Action) (bool, runtime.Object, error) {
return true, pod, apierrors.NewAlreadyExists(action.GetResource().GroupResource(), pod.Name)
})
if err := control.CreateStatefulPod(set, pod); !apierrors.IsAlreadyExists(err) {
t.Errorf("Failed to create Pod error: %s", err)
}
events := collectEvents(recorder.Events)
if eventCount := len(events); eventCount != 0 {
t.Errorf("Expected 0 events when Pod and PVC exist found %d", eventCount)
for i := range events {
t.Log(events[i])
}
}
}
func TestStatefulPodControlCreatePodPvcCreateFailure(t *testing.T) {
recorder := record.NewFakeRecorder(10)
set := newStatefulSet(3)
pod := newStatefulSetPod(set, 0)
fakeClient := &fake.Clientset{}
pvcIndexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
pvcLister := corelisters.NewPersistentVolumeClaimLister(pvcIndexer)
control := NewRealStatefulPodControl(fakeClient, nil, nil, pvcLister, recorder)
fakeClient.AddReactor("create", "persistentvolumeclaims", func(action core.Action) (bool, runtime.Object, error) {
return true, nil, apierrors.NewInternalError(errors.New("API server down"))
})
fakeClient.AddReactor("create", "pods", func(action core.Action) (bool, runtime.Object, error) {
create := action.(core.CreateAction)
return true, create.GetObject(), nil
})
if err := control.CreateStatefulPod(set, pod); err == nil {
t.Error("Failed to produce error on PVC creation failure")
}
events := collectEvents(recorder.Events)
if eventCount := len(events); eventCount != 2 {
t.Errorf("Expected 2 events for PVC create failure found %d", eventCount)
}
for i := range events {
if !strings.Contains(events[i], v1.EventTypeWarning) {
t.Errorf("Expected normal events found %s", events[i])
}
}
}
type fakeIndexer struct {
cache.Indexer
getError error
}
func (f *fakeIndexer) GetByKey(key string) (interface{}, bool, error) {
return nil, false, f.getError
}
func TestStatefulPodControlCreatePodPvcGetFailure(t *testing.T) {
recorder := record.NewFakeRecorder(10)
set := newStatefulSet(3)
pod := newStatefulSetPod(set, 0)
fakeClient := &fake.Clientset{}
pvcIndexer := &fakeIndexer{getError: errors.New("API server down")}
pvcLister := corelisters.NewPersistentVolumeClaimLister(pvcIndexer)
control := NewRealStatefulPodControl(fakeClient, nil, nil, pvcLister, recorder)
fakeClient.AddReactor("create", "persistentvolumeclaims", func(action core.Action) (bool, runtime.Object, error) {
return true, nil, apierrors.NewInternalError(errors.New("API server down"))
})
fakeClient.AddReactor("create", "pods", func(action core.Action) (bool, runtime.Object, error) {
create := action.(core.CreateAction)
return true, create.GetObject(), nil
})
if err := control.CreateStatefulPod(set, pod); err == nil {
t.Error("Failed to produce error on PVC creation failure")
}
events := collectEvents(recorder.Events)
if eventCount := len(events); eventCount != 2 {
t.Errorf("Expected 2 events for PVC create failure found %d", eventCount)
}
for i := range events {
if !strings.Contains(events[i], v1.EventTypeWarning) {
t.Errorf("Expected normal events found %s", events[i])
}
}
}
func TestStatefulPodControlCreatePodFailed(t *testing.T) {
recorder := record.NewFakeRecorder(10)
set := newStatefulSet(3)
pod := newStatefulSetPod(set, 0)
fakeClient := &fake.Clientset{}
pvcIndexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
pvcLister := corelisters.NewPersistentVolumeClaimLister(pvcIndexer)
control := NewRealStatefulPodControl(fakeClient, nil, nil, pvcLister, recorder)
fakeClient.AddReactor("create", "persistentvolumeclaims", func(action core.Action) (bool, runtime.Object, error) {
create := action.(core.CreateAction)
return true, create.GetObject(), nil
})
fakeClient.AddReactor("create", "pods", func(action core.Action) (bool, runtime.Object, error) {
return true, nil, apierrors.NewInternalError(errors.New("API server down"))
})
if err := control.CreateStatefulPod(set, pod); err == nil {
t.Error("Failed to produce error on Pod creation failure")
}
events := collectEvents(recorder.Events)
if eventCount := len(events); eventCount != 2 {
t.Errorf("Expected 2 events for failed Pod create found %d", eventCount)
} else if !strings.Contains(events[0], v1.EventTypeNormal) {
t.Errorf("Expected normal event found %s", events[0])
} else if !strings.Contains(events[1], v1.EventTypeWarning) {
t.Errorf("Expected warning event found %s", events[1])
}
}
func TestStatefulPodControlNoOpUpdate(t *testing.T) {
recorder := record.NewFakeRecorder(10)
set := newStatefulSet(3)
pod := newStatefulSetPod(set, 0)
fakeClient := &fake.Clientset{}
control := NewRealStatefulPodControl(fakeClient, nil, nil, nil, recorder)
fakeClient.AddReactor("*", "*", func(action core.Action) (bool, runtime.Object, error) {
t.Error("no-op update should not make any client invocation")
return true, nil, apierrors.NewInternalError(errors.New("If we are here we have a problem"))
})
if err := control.UpdateStatefulPod(set, pod); err != nil {
t.Errorf("Error returned on no-op update error: %s", err)
}
events := collectEvents(recorder.Events)
if eventCount := len(events); eventCount != 0 {
t.Errorf("Expected 0 events for no-op update found %d", eventCount)
}
}
func TestStatefulPodControlUpdatesIdentity(t *testing.T) {
recorder := record.NewFakeRecorder(10)
set := newStatefulSet(3)
pod := newStatefulSetPod(set, 0)
fakeClient := fake.NewSimpleClientset(set, pod)
control := NewRealStatefulPodControl(fakeClient, nil, nil, nil, recorder)
var updated *v1.Pod
fakeClient.PrependReactor("update", "pods", func(action core.Action) (bool, runtime.Object, error) {
update := action.(core.UpdateAction)
updated = update.GetObject().(*v1.Pod)
return true, update.GetObject(), nil
})
pod.Name = "goo-0"
if err := control.UpdateStatefulPod(set, pod); err != nil {
t.Errorf("Successful update returned an error: %s", err)
}
events := collectEvents(recorder.Events)
if eventCount := len(events); eventCount != 1 {
t.Errorf("Expected 1 event for successful Pod update found %d", eventCount)
} else if !strings.Contains(events[0], v1.EventTypeNormal) {
t.Errorf("Expected normal event found %s", events[0])
}
if !identityMatches(set, updated) {
t.Error("Name update failed identity does not match")
}
}
func TestStatefulPodControlUpdateIdentityFailure(t *testing.T) {
recorder := record.NewFakeRecorder(10)
set := newStatefulSet(3)
pod := newStatefulSetPod(set, 0)
fakeClient := &fake.Clientset{}
indexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
gooPod := newStatefulSetPod(set, 0)
gooPod.Name = "goo-0"
indexer.Add(gooPod)
podLister := corelisters.NewPodLister(indexer)
control := NewRealStatefulPodControl(fakeClient, nil, podLister, nil, recorder)
fakeClient.AddReactor("update", "pods", func(action core.Action) (bool, runtime.Object, error) {
pod.Name = "goo-0"
return true, nil, apierrors.NewInternalError(errors.New("API server down"))
})
pod.Name = "goo-0"
if err := control.UpdateStatefulPod(set, pod); err == nil {
t.Error("Failed update does not generate an error")
}
events := collectEvents(recorder.Events)
if eventCount := len(events); eventCount != 1 {
t.Errorf("Expected 1 event for failed Pod update found %d", eventCount)
} else if !strings.Contains(events[0], v1.EventTypeWarning) {
t.Errorf("Expected warning event found %s", events[0])
}
if identityMatches(set, pod) {
t.Error("Failed update mutated Pod identity")
}
}
func TestStatefulPodControlUpdatesPodStorage(t *testing.T) {
recorder := record.NewFakeRecorder(10)
set := newStatefulSet(3)
pod := newStatefulSetPod(set, 0)
fakeClient := &fake.Clientset{}
pvcIndexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
pvcLister := corelisters.NewPersistentVolumeClaimLister(pvcIndexer)
control := NewRealStatefulPodControl(fakeClient, nil, nil, pvcLister, recorder)
pvcs := getPersistentVolumeClaims(set, pod)
volumes := make([]v1.Volume, len(pod.Spec.Volumes))
for i := range pod.Spec.Volumes {
if _, contains := pvcs[pod.Spec.Volumes[i].Name]; !contains {
volumes = append(volumes, pod.Spec.Volumes[i])
}
}
pod.Spec.Volumes = volumes
fakeClient.AddReactor("update", "pods", func(action core.Action) (bool, runtime.Object, error) {
update := action.(core.UpdateAction)
return true, update.GetObject(), nil
})
fakeClient.AddReactor("create", "persistentvolumeclaims", func(action core.Action) (bool, runtime.Object, error) {
update := action.(core.UpdateAction)
return true, update.GetObject(), nil
})
var updated *v1.Pod
fakeClient.PrependReactor("update", "pods", func(action core.Action) (bool, runtime.Object, error) {
update := action.(core.UpdateAction)
updated = update.GetObject().(*v1.Pod)
return true, update.GetObject(), nil
})
if err := control.UpdateStatefulPod(set, pod); err != nil {
t.Errorf("Successful update returned an error: %s", err)
}
events := collectEvents(recorder.Events)
if eventCount := len(events); eventCount != 2 {
t.Errorf("Expected 2 event for successful Pod storage update found %d", eventCount)
}
for i := range events {
if !strings.Contains(events[i], v1.EventTypeNormal) {
t.Errorf("Expected normal event found %s", events[i])
}
}
if !storageMatches(set, updated) {
t.Error("Name update failed identity does not match")
}
}
func TestStatefulPodControlUpdatePodStorageFailure(t *testing.T) {
recorder := record.NewFakeRecorder(10)
set := newStatefulSet(3)
pod := newStatefulSetPod(set, 0)
fakeClient := &fake.Clientset{}
pvcIndexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
pvcLister := corelisters.NewPersistentVolumeClaimLister(pvcIndexer)
control := NewRealStatefulPodControl(fakeClient, nil, nil, pvcLister, recorder)
pvcs := getPersistentVolumeClaims(set, pod)
volumes := make([]v1.Volume, len(pod.Spec.Volumes))
for i := range pod.Spec.Volumes {
if _, contains := pvcs[pod.Spec.Volumes[i].Name]; !contains {
volumes = append(volumes, pod.Spec.Volumes[i])
}
}
pod.Spec.Volumes = volumes
fakeClient.AddReactor("update", "pods", func(action core.Action) (bool, runtime.Object, error) {
update := action.(core.UpdateAction)
return true, update.GetObject(), nil
})
fakeClient.AddReactor("create", "persistentvolumeclaims", func(action core.Action) (bool, runtime.Object, error) {
return true, nil, apierrors.NewInternalError(errors.New("API server down"))
})
if err := control.UpdateStatefulPod(set, pod); err == nil {
t.Error("Failed Pod storage update did not return an error")
}
events := collectEvents(recorder.Events)
if eventCount := len(events); eventCount != 2 {
t.Errorf("Expected 2 event for failed Pod storage update found %d", eventCount)
}
for i := range events {
if !strings.Contains(events[i], v1.EventTypeWarning) {
t.Errorf("Expected normal event found %s", events[i])
}
}
}
func TestStatefulPodControlUpdatePodConflictSuccess(t *testing.T) {
recorder := record.NewFakeRecorder(10)
set := newStatefulSet(3)
pod := newStatefulSetPod(set, 0)
fakeClient := &fake.Clientset{}
indexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
gooPod := newStatefulSetPod(set, 0)
gooPod.Name = "goo-0"
indexer.Add(gooPod)
podLister := corelisters.NewPodLister(indexer)
control := NewRealStatefulPodControl(fakeClient, nil, podLister, nil, recorder)
conflict := false
fakeClient.AddReactor("update", "pods", func(action core.Action) (bool, runtime.Object, error) {
update := action.(core.UpdateAction)
if !conflict {
conflict = true
return true, update.GetObject(), apierrors.NewConflict(action.GetResource().GroupResource(), pod.Name, errors.New("conflict"))
} else {
return true, update.GetObject(), nil
}
})
pod.Name = "goo-0"
if err := control.UpdateStatefulPod(set, pod); err != nil {
t.Errorf("Successful update returned an error: %s", err)
}
events := collectEvents(recorder.Events)
if eventCount := len(events); eventCount != 1 {
t.Errorf("Expected 1 event for successful Pod update found %d", eventCount)
} else if !strings.Contains(events[0], v1.EventTypeNormal) {
t.Errorf("Expected normal event found %s", events[0])
}
if !identityMatches(set, pod) {
t.Error("Name update failed identity does not match")
}
}
func TestStatefulPodControlDeletesStatefulPod(t *testing.T) {
recorder := record.NewFakeRecorder(10)
set := newStatefulSet(3)
pod := newStatefulSetPod(set, 0)
fakeClient := &fake.Clientset{}
control := NewRealStatefulPodControl(fakeClient, nil, nil, nil, recorder)
fakeClient.AddReactor("delete", "pods", func(action core.Action) (bool, runtime.Object, error) {
return true, nil, nil
})
if err := control.DeleteStatefulPod(set, pod); err != nil {
t.Errorf("Error returned on successful delete: %s", err)
}
events := collectEvents(recorder.Events)
if eventCount := len(events); eventCount != 1 {
t.Errorf("Expected 1 events for successful delete found %d", eventCount)
} else if !strings.Contains(events[0], v1.EventTypeNormal) {
t.Errorf("Expected normal event found %s", events[0])
}
}
func TestStatefulPodControlDeleteFailure(t *testing.T) {
recorder := record.NewFakeRecorder(10)
set := newStatefulSet(3)
pod := newStatefulSetPod(set, 0)
fakeClient := &fake.Clientset{}
control := NewRealStatefulPodControl(fakeClient, nil, nil, nil, recorder)
fakeClient.AddReactor("delete", "pods", func(action core.Action) (bool, runtime.Object, error) {
return true, nil, apierrors.NewInternalError(errors.New("API server down"))
})
if err := control.DeleteStatefulPod(set, pod); err == nil {
t.Error("Fialed to return error on failed delete")
}
events := collectEvents(recorder.Events)
if eventCount := len(events); eventCount != 1 {
t.Errorf("Expected 1 events for failed delete found %d", eventCount)
} else if !strings.Contains(events[0], v1.EventTypeWarning) {
t.Errorf("Expected warning event found %s", events[0])
}
}
func collectEvents(source <-chan string) []string {
done := false
events := make([]string, 0)
for !done {
select {
case event := <-source:
events = append(events, event)
default:
done = true
}
}
return events
}