forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 1
/
volume_provisioning.go
421 lines (365 loc) · 14.1 KB
/
volume_provisioning.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
/*
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 e2e
import (
"time"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apiserver/pkg/authentication/serviceaccount"
"k8s.io/kubernetes/pkg/api/v1"
rbacv1beta1 "k8s.io/kubernetes/pkg/apis/rbac/v1beta1"
storage "k8s.io/kubernetes/pkg/apis/storage/v1beta1"
storageutil "k8s.io/kubernetes/pkg/apis/storage/v1beta1/util"
"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
"k8s.io/kubernetes/test/e2e/framework"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
const (
// Requested size of the volume
requestedSize = "1500Mi"
// Plugin name of the external provisioner
externalPluginName = "example.com/nfs"
)
func testDynamicProvisioning(client clientset.Interface, claim *v1.PersistentVolumeClaim, expectedSize string) {
err := framework.WaitForPersistentVolumeClaimPhase(v1.ClaimBound, client, claim.Namespace, claim.Name, framework.Poll, framework.ClaimProvisionTimeout)
Expect(err).NotTo(HaveOccurred())
By("checking the claim")
// Get new copy of the claim
claim, err = client.Core().PersistentVolumeClaims(claim.Namespace).Get(claim.Name, metav1.GetOptions{})
Expect(err).NotTo(HaveOccurred())
// Get the bound PV
pv, err := client.Core().PersistentVolumes().Get(claim.Spec.VolumeName, metav1.GetOptions{})
Expect(err).NotTo(HaveOccurred())
// Check sizes
expectedCapacity := resource.MustParse(expectedSize)
pvCapacity := pv.Spec.Capacity[v1.ResourceName(v1.ResourceStorage)]
Expect(pvCapacity.Value()).To(Equal(expectedCapacity.Value()), "pvCapacity is not equal to expectedCapacity")
requestedCapacity := resource.MustParse(requestedSize)
claimCapacity := claim.Spec.Resources.Requests[v1.ResourceName(v1.ResourceStorage)]
Expect(claimCapacity.Value()).To(Equal(requestedCapacity.Value()), "claimCapacity is not equal to requestedCapacity")
// Check PV properties
Expect(pv.Spec.PersistentVolumeReclaimPolicy).To(Equal(v1.PersistentVolumeReclaimDelete))
expectedAccessModes := []v1.PersistentVolumeAccessMode{v1.ReadWriteOnce}
Expect(pv.Spec.AccessModes).To(Equal(expectedAccessModes))
Expect(pv.Spec.ClaimRef.Name).To(Equal(claim.ObjectMeta.Name))
Expect(pv.Spec.ClaimRef.Namespace).To(Equal(claim.ObjectMeta.Namespace))
// We start two pods:
// - The first writes 'hello word' to the /mnt/test (= the volume).
// - The second one runs grep 'hello world' on /mnt/test.
// If both succeed, Kubernetes actually allocated something that is
// persistent across pods.
By("checking the created volume is writable")
runInPodWithVolume(client, claim.Namespace, claim.Name, "echo 'hello world' > /mnt/test/data")
By("checking the created volume is readable and retains data")
runInPodWithVolume(client, claim.Namespace, claim.Name, "grep 'hello world' /mnt/test/data")
By("deleting the claim")
framework.ExpectNoError(client.Core().PersistentVolumeClaims(claim.Namespace).Delete(claim.Name, nil))
// Wait for the PV to get deleted. Technically, the first few delete
// attempts may fail, as the volume is still attached to a node because
// kubelet is slowly cleaning up a pod, however it should succeed in a
// couple of minutes. Wait 20 minutes to recover from random cloud hiccups.
framework.ExpectNoError(framework.WaitForPersistentVolumeDeleted(client, pv.Name, 5*time.Second, 20*time.Minute))
}
var _ = framework.KubeDescribe("Dynamic provisioning", func() {
f := framework.NewDefaultFramework("volume-provisioning")
// filled in BeforeEach
var c clientset.Interface
var ns string
BeforeEach(func() {
c = f.ClientSet
ns = f.Namespace.Name
})
framework.KubeDescribe("DynamicProvisioner", func() {
It("should create and delete persistent volumes [Slow] [Volume]", func() {
framework.SkipUnlessProviderIs("openstack", "gce", "aws", "gke", "vsphere")
By("creating a StorageClass")
class := newStorageClass("", "internal")
_, err := c.Storage().StorageClasses().Create(class)
defer c.Storage().StorageClasses().Delete(class.Name, nil)
Expect(err).NotTo(HaveOccurred())
By("creating a claim with a dynamic provisioning annotation")
claim := newClaim(ns, "internal", false)
defer func() {
c.Core().PersistentVolumeClaims(ns).Delete(claim.Name, nil)
}()
claim, err = c.Core().PersistentVolumeClaims(ns).Create(claim)
Expect(err).NotTo(HaveOccurred())
if framework.ProviderIs("vsphere") {
// vsphere provider does not allocate volumes in 1GiB chunks, so setting expected size
// equal to requestedSize
testDynamicProvisioning(c, claim, requestedSize)
} else {
// Expected size of the volume is 2GiB, because the other three supported cloud
// providers allocate volumes in 1GiB chunks.
testDynamicProvisioning(c, claim, "2Gi")
}
})
// NOTE: Slow! The test will wait up to 5 minutes (framework.ClaimProvisionTimeout) when there is
// no regression.
It("should not provision a volume in an unmanaged GCE zone. [Slow]", func() {
framework.SkipUnlessProviderIs("gce", "gke")
var suffix string = "unmananged"
By("Discovering an unmanaged zone")
allZones := sets.NewString() // all zones in the project
managedZones := sets.NewString() // subset of allZones
gceCloud, err := getGCECloud()
Expect(err).NotTo(HaveOccurred())
// Get all k8s managed zones
managedZones, err = gceCloud.GetAllZones()
Expect(err).NotTo(HaveOccurred())
// Get a list of all zones in the project
zones, err := gceCloud.GetComputeService().Zones.List(framework.TestContext.CloudConfig.ProjectID).Do()
for _, z := range zones.Items {
allZones.Insert(z.Name)
}
// Get the subset of zones not managed by k8s
var unmanagedZone string
var popped bool
unmanagedZones := allZones.Difference(managedZones)
// And select one of them at random.
if unmanagedZone, popped = unmanagedZones.PopAny(); !popped {
framework.Skipf("No unmanaged zones found.")
}
By("Creating a StorageClass for the unmanaged zone")
sc := newStorageClass("kubernetes.io/gce-pd", suffix)
// Set an unmanaged zone.
sc.Parameters = map[string]string{"zone": unmanagedZone}
sc, err = c.Storage().StorageClasses().Create(sc)
defer Expect(c.Storage().StorageClasses().Delete(sc.Name, nil)).To(Succeed())
Expect(err).NotTo(HaveOccurred())
By("Creating a claim and expecting it to timeout")
pvc := newClaim(ns, suffix, false)
pvc, err = c.Core().PersistentVolumeClaims(ns).Create(pvc)
defer Expect(c.Core().PersistentVolumeClaims(ns).Delete(pvc.Name, nil)).To(Succeed())
Expect(err).NotTo(HaveOccurred())
// The claim should timeout phase:Pending
err = framework.WaitForPersistentVolumeClaimPhase(v1.ClaimBound, c, ns, pvc.Name, 2*time.Second, framework.ClaimProvisionTimeout)
Expect(err).To(HaveOccurred())
framework.Logf(err.Error())
})
})
framework.KubeDescribe("DynamicProvisioner Alpha", func() {
It("should create and delete alpha persistent volumes [Slow] [Volume]", func() {
framework.SkipUnlessProviderIs("openstack", "gce", "aws", "gke", "vsphere")
By("creating a claim with an alpha dynamic provisioning annotation")
claim := newClaim(ns, "", true)
defer func() {
c.Core().PersistentVolumeClaims(ns).Delete(claim.Name, nil)
}()
claim, err := c.Core().PersistentVolumeClaims(ns).Create(claim)
Expect(err).NotTo(HaveOccurred())
if framework.ProviderIs("vsphere") {
testDynamicProvisioning(c, claim, requestedSize)
} else {
testDynamicProvisioning(c, claim, "2Gi")
}
})
})
framework.KubeDescribe("DynamicProvisioner External", func() {
It("should let an external dynamic provisioner create and delete persistent volumes [Slow]", func() {
// external dynamic provisioner pods need additional permissions provided by the
// persistent-volume-provisioner role
framework.BindClusterRole(c.Rbac(), "system:persistent-volume-provisioner", ns,
rbacv1beta1.Subject{Kind: rbacv1beta1.ServiceAccountKind, Namespace: ns, Name: "default"})
err := framework.WaitForAuthorizationUpdate(c.AuthorizationV1beta1(),
serviceaccount.MakeUsername(ns, "default"),
"", "get", schema.GroupResource{Group: "storage.k8s.io", Resource: "storageclasses"}, true)
framework.ExpectNoError(err, "Failed to update authorization: %v", err)
By("creating an external dynamic provisioner pod")
pod := startExternalProvisioner(c, ns)
defer c.Core().Pods(ns).Delete(pod.Name, nil)
By("creating a StorageClass")
class := newStorageClass(externalPluginName, "external")
_, err = c.Storage().StorageClasses().Create(class)
defer c.Storage().StorageClasses().Delete(class.Name, nil)
Expect(err).NotTo(HaveOccurred())
By("creating a claim with a dynamic provisioning annotation")
claim := newClaim(ns, "external", false)
defer func() {
c.Core().PersistentVolumeClaims(ns).Delete(claim.Name, nil)
}()
claim, err = c.Core().PersistentVolumeClaims(ns).Create(claim)
Expect(err).NotTo(HaveOccurred())
// Expected size of the externally provisioned volume depends on the external
// provisioner: for nfs-provisioner used here, it's equal to requested
testDynamicProvisioning(c, claim, requestedSize)
})
})
})
func newClaim(ns, suffix string, alpha bool) *v1.PersistentVolumeClaim {
claim := v1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
GenerateName: "pvc-",
Namespace: ns,
},
Spec: v1.PersistentVolumeClaimSpec{
AccessModes: []v1.PersistentVolumeAccessMode{
v1.ReadWriteOnce,
},
Resources: v1.ResourceRequirements{
Requests: v1.ResourceList{
v1.ResourceName(v1.ResourceStorage): resource.MustParse(requestedSize),
},
},
},
}
if alpha {
claim.Annotations = map[string]string{
storageutil.AlphaStorageClassAnnotation: "",
}
} else {
claim.Annotations = map[string]string{
storageutil.StorageClassAnnotation: "myclass-" + suffix,
}
}
return &claim
}
// runInPodWithVolume runs a command in a pod with given claim mounted to /mnt directory.
func runInPodWithVolume(c clientset.Interface, ns, claimName, command string) {
pod := &v1.Pod{
TypeMeta: metav1.TypeMeta{
Kind: "Pod",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
GenerateName: "pvc-volume-tester-",
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: "volume-tester",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"/bin/sh"},
Args: []string{"-c", command},
VolumeMounts: []v1.VolumeMount{
{
Name: "my-volume",
MountPath: "/mnt/test",
},
},
},
},
RestartPolicy: v1.RestartPolicyNever,
Volumes: []v1.Volume{
{
Name: "my-volume",
VolumeSource: v1.VolumeSource{
PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
ClaimName: claimName,
ReadOnly: false,
},
},
},
},
},
}
pod, err := c.Core().Pods(ns).Create(pod)
defer func() {
framework.ExpectNoError(c.Core().Pods(ns).Delete(pod.Name, nil))
}()
framework.ExpectNoError(err, "Failed to create pod: %v", err)
framework.ExpectNoError(framework.WaitForPodSuccessInNamespaceSlow(c, pod.Name, pod.Namespace))
}
func newStorageClass(pluginName, suffix string) *storage.StorageClass {
if pluginName == "" {
switch {
case framework.ProviderIs("gke"), framework.ProviderIs("gce"):
pluginName = "kubernetes.io/gce-pd"
case framework.ProviderIs("aws"):
pluginName = "kubernetes.io/aws-ebs"
case framework.ProviderIs("openstack"):
pluginName = "kubernetes.io/cinder"
case framework.ProviderIs("vsphere"):
pluginName = "kubernetes.io/vsphere-volume"
}
}
return &storage.StorageClass{
TypeMeta: metav1.TypeMeta{
Kind: "StorageClass",
},
ObjectMeta: metav1.ObjectMeta{
Name: "myclass-" + suffix,
},
Provisioner: pluginName,
}
}
func startExternalProvisioner(c clientset.Interface, ns string) *v1.Pod {
podClient := c.Core().Pods(ns)
provisionerPod := &v1.Pod{
TypeMeta: metav1.TypeMeta{
Kind: "Pod",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
GenerateName: "external-provisioner-",
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: "nfs-provisioner",
Image: "quay.io/kubernetes_incubator/nfs-provisioner:v1.0.3",
SecurityContext: &v1.SecurityContext{
Capabilities: &v1.Capabilities{
Add: []v1.Capability{"DAC_READ_SEARCH"},
},
},
Args: []string{
"-provisioner=" + externalPluginName,
"-grace-period=0",
},
Ports: []v1.ContainerPort{
{Name: "nfs", ContainerPort: 2049},
{Name: "mountd", ContainerPort: 20048},
{Name: "rpcbind", ContainerPort: 111},
{Name: "rpcbind-udp", ContainerPort: 111, Protocol: v1.ProtocolUDP},
},
Env: []v1.EnvVar{
{
Name: "POD_IP",
ValueFrom: &v1.EnvVarSource{
FieldRef: &v1.ObjectFieldSelector{
FieldPath: "status.podIP",
},
},
},
},
ImagePullPolicy: v1.PullIfNotPresent,
VolumeMounts: []v1.VolumeMount{
{
Name: "export-volume",
MountPath: "/export",
},
},
},
},
Volumes: []v1.Volume{
{
Name: "export-volume",
VolumeSource: v1.VolumeSource{
EmptyDir: &v1.EmptyDirVolumeSource{},
},
},
},
},
}
provisionerPod, err := podClient.Create(provisionerPod)
framework.ExpectNoError(err, "Failed to create %s pod: %v", provisionerPod.Name, err)
framework.ExpectNoError(framework.WaitForPodRunningInNamespace(c, provisionerPod))
By("locating the provisioner pod")
pod, err := podClient.Get(provisionerPod.Name, metav1.GetOptions{})
framework.ExpectNoError(err, "Cannot locate the provisioner pod %v: %v", provisionerPod.Name, err)
return pod
}