This repository has been archived by the owner on Jan 27, 2021. It is now read-only.
forked from kubernetes/autoscaler
-
Notifications
You must be signed in to change notification settings - Fork 1
/
updater.go
376 lines (322 loc) · 14.4 KB
/
updater.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
/*
Copyright 2019 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 autoscaling
import (
"fmt"
"time"
appsv1 "k8s.io/api/apps/v1"
autoscaling "k8s.io/api/autoscaling/v1"
apiv1 "k8s.io/api/core/v1"
policyv1beta1 "k8s.io/api/policy/v1beta1"
apierrs "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/apimachinery/pkg/util/wait"
vpa_types "k8s.io/autoscaler/vertical-pod-autoscaler/pkg/apis/autoscaling.k8s.io/v1"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/kubernetes/test/e2e/framework"
testutils "k8s.io/kubernetes/test/utils"
"github.com/onsi/ginkgo"
"github.com/onsi/gomega"
)
var _ = UpdaterE2eDescribe("Updater", func() {
f := framework.NewDefaultFramework("vertical-pod-autoscaling")
ginkgo.It("evicts pods in a Deployment", func() {
testEvictsPods(f, &autoscaling.CrossVersionObjectReference{
APIVersion: "apps/v1",
Kind: "Deployment",
Name: "hamster-deployment",
})
})
ginkgo.It("evicts pods in a Replication Controller", func() {
testEvictsPods(f, &autoscaling.CrossVersionObjectReference{
APIVersion: "v1",
Kind: "ReplicationController",
Name: "hamster-rc",
})
})
ginkgo.It("evicts pods in a Job", func() {
testEvictsPods(f, &autoscaling.CrossVersionObjectReference{
APIVersion: "batch/v1",
Kind: "Job",
Name: "hamster-job",
})
})
ginkgo.It("evicts pods in a ReplicaSet", func() {
testEvictsPods(f, &autoscaling.CrossVersionObjectReference{
APIVersion: "apps/v1",
Kind: "ReplicaSet",
Name: "hamster-rs",
})
})
ginkgo.It("evicts pods in a StatefulSet", func() {
testEvictsPods(f, &autoscaling.CrossVersionObjectReference{
APIVersion: "apps/v1",
Kind: "StatefulSet",
Name: "hamster-stateful",
})
})
ginkgo.It("observes pod disruption budget", func() {
ginkgo.By("Setting up a hamster deployment")
c := f.ClientSet
ns := f.Namespace.Name
SetupHamsterDeployment(f, "10m", "10Mi", 10)
podList, err := GetHamsterPods(f)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
podSet := MakePodSet(podList)
ginkgo.By("Setting up prohibitive PDB for hamster deployment")
pdb := setupPDB(f, "hamster-pdb", 0 /* maxUnavailable */)
ginkgo.By("Setting up a VPA CRD")
SetupVPA(f, "25m", vpa_types.UpdateModeAuto, hamsterTargetRef)
ginkgo.By(fmt.Sprintf("Waiting for pods to be evicted, hoping it won't happen, sleep for %s", VpaEvictionTimeout.String()))
CheckNoPodsEvicted(f, podSet)
ginkgo.By("Updating the PDB to allow for multiple pods to be evicted")
// We will check that 7 replicas are evicted in 3 minutes, which translates
// to 3 updater loops. This gives us relatively good confidence that updater
// evicts more than one pod in a loop if PDB allows it.
permissiveMaxUnavailable := 7
// Creating new PDB and removing old one, since PDBs are immutable at the moment
setupPDB(f, "hamster-pdb-2", permissiveMaxUnavailable)
err = c.PolicyV1beta1().PodDisruptionBudgets(ns).Delete(pdb.Name, &metav1.DeleteOptions{})
gomega.Expect(err).NotTo(gomega.HaveOccurred())
ginkgo.By(fmt.Sprintf("Waiting for pods to be evicted, sleep for %s", VpaEvictionTimeout.String()))
time.Sleep(VpaEvictionTimeout)
ginkgo.By("Checking enough pods were evicted.")
currentPodList, err := GetHamsterPods(f)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
evictedCount := GetEvictedPodsCount(MakePodSet(currentPodList), podSet)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
gomega.Expect(evictedCount >= permissiveMaxUnavailable).To(gomega.BeTrue())
})
ginkgo.It("observes container max in LimitRange", func() {
ginkgo.By("Setting up a hamster deployment")
d := NewHamsterDeploymentWithResourcesAndLimits(f,
ParseQuantityOrDie("100m") /*cpu request*/, ParseQuantityOrDie("200Mi"), /*memory request*/
ParseQuantityOrDie("300m") /*cpu limit*/, ParseQuantityOrDie("400Mi") /*memory limit*/)
podList := startDeploymentPods(f, d)
ginkgo.By("Setting up a VPA CRD")
SetupVPA(f, "200m", vpa_types.UpdateModeAuto, hamsterTargetRef)
// Max CPU limit is 300m and ratio is 3., so max request is 100m, while
// recommendation is 200m
// Max memory limit is 1T and ratio is 2., so max request is 0.5T
InstallLimitRangeWithMax(f, "300m", "1T", apiv1.LimitTypeContainer)
ginkgo.By(fmt.Sprintf("Waiting for pods to be evicted, hoping it won't happen, sleep for %s", VpaEvictionTimeout.String()))
CheckNoPodsEvicted(f, MakePodSet(podList))
})
ginkgo.It("observes container min in LimitRange", func() {
ginkgo.By("Setting up a hamster deployment")
d := NewHamsterDeploymentWithResourcesAndLimits(f,
ParseQuantityOrDie("100m") /*cpu request*/, ParseQuantityOrDie("200Mi"), /*memory request*/
ParseQuantityOrDie("300m") /*cpu limit*/, ParseQuantityOrDie("400Mi") /*memory limit*/)
podList := startDeploymentPods(f, d)
ginkgo.By("Setting up a VPA CRD")
SetupVPA(f, "50m", vpa_types.UpdateModeAuto, hamsterTargetRef)
// Min CPU from limit range is 100m and ratio is 3. Min applies both to limit and request so min
// request is 100m request and 300m limit
// Min memory limit is 0 and ratio is 2., so min request is 0
InstallLimitRangeWithMin(f, "100m", "0", apiv1.LimitTypeContainer)
ginkgo.By(fmt.Sprintf("Waiting for pods to be evicted, hoping it won't happen, sleep for %s", VpaEvictionTimeout.String()))
CheckNoPodsEvicted(f, MakePodSet(podList))
})
ginkgo.It("observes pod max in LimitRange", func() {
ginkgo.By("Setting up a hamster deployment")
d := NewHamsterDeploymentWithResourcesAndLimits(f,
ParseQuantityOrDie("100m") /*cpu request*/, ParseQuantityOrDie("200Mi"), /*memory request*/
ParseQuantityOrDie("300m") /*cpu limit*/, ParseQuantityOrDie("400Mi") /*memory limit*/)
d.Spec.Template.Spec.Containers = append(d.Spec.Template.Spec.Containers, d.Spec.Template.Spec.Containers[0])
d.Spec.Template.Spec.Containers[1].Name = "hamster2"
podList := startDeploymentPods(f, d)
ginkgo.By("Setting up a VPA CRD")
SetupVPAForTwoHamsters(f, "200m", vpa_types.UpdateModeAuto, hamsterTargetRef)
// Max CPU limit is 600m per pod, 300m per container and ratio is 3., so max request is 100m,
// while recommendation is 200m
// Max memory limit is 2T per pod, 1T per container and ratio is 2., so max request is 0.5T
InstallLimitRangeWithMax(f, "600m", "2T", apiv1.LimitTypePod)
ginkgo.By(fmt.Sprintf("Waiting for pods to be evicted, hoping it won't happen, sleep for %s", VpaEvictionTimeout.String()))
CheckNoPodsEvicted(f, MakePodSet(podList))
})
ginkgo.It("observes pod min in LimitRange", func() {
ginkgo.By("Setting up a hamster deployment")
d := NewHamsterDeploymentWithResourcesAndLimits(f,
ParseQuantityOrDie("100m") /*cpu request*/, ParseQuantityOrDie("200Mi"), /*memory request*/
ParseQuantityOrDie("300m") /*cpu limit*/, ParseQuantityOrDie("400Mi") /*memory limit*/)
d.Spec.Template.Spec.Containers = append(d.Spec.Template.Spec.Containers, d.Spec.Template.Spec.Containers[0])
d.Spec.Template.Spec.Containers[1].Name = "hamster2"
podList := startDeploymentPods(f, d)
ginkgo.By("Setting up a VPA CRD")
SetupVPAForTwoHamsters(f, "50m", vpa_types.UpdateModeAuto, hamsterTargetRef)
// Min CPU from limit range is 200m per pod, 100m per container and ratio is 3. Min applies both
// to limit and request so min request is 100m request and 300m limit
// Min memory limit is 0 and ratio is 2., so min request is 0
InstallLimitRangeWithMin(f, "200m", "0", apiv1.LimitTypePod)
ginkgo.By(fmt.Sprintf("Waiting for pods to be evicted, hoping it won't happen, sleep for %s", VpaEvictionTimeout.String()))
CheckNoPodsEvicted(f, MakePodSet(podList))
})
})
func testEvictsPods(f *framework.Framework, controller *autoscaling.CrossVersionObjectReference) {
ginkgo.By(fmt.Sprintf("Setting up a hamster %v", controller.Kind))
setupHamsterController(f, controller.Kind, "100m", "100Mi", defaultHamsterReplicas)
podList, err := GetHamsterPods(f)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
ginkgo.By("Setting up a VPA CRD")
SetupVPA(f, "200m", vpa_types.UpdateModeAuto, controller)
ginkgo.By("Waiting for pods to be evicted")
err = WaitForPodsEvicted(f, podList)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
}
func setupHamsterController(f *framework.Framework, controllerKind, cpu, memory string, replicas int32) *apiv1.PodList {
switch controllerKind {
case "Deployment":
SetupHamsterDeployment(f, cpu, memory, replicas)
case "ReplicationController":
setupHamsterReplicationController(f, cpu, memory, replicas)
case "Job":
setupHamsterJob(f, cpu, memory, replicas)
case "ReplicaSet":
setupHamsterRS(f, cpu, memory, replicas)
case "StatefulSet":
setupHamsterStateful(f, cpu, memory, replicas)
default:
framework.Failf("Unknown controller kind: %v", controllerKind)
return nil
}
pods, err := GetHamsterPods(f)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
return pods
}
func setupHamsterReplicationController(f *framework.Framework, cpu, memory string, replicas int32) {
hamsterContainer := setupHamsterContainer(cpu, memory)
rc := framework.RcByNameContainer("hamster-rc", replicas, "k8s.gcr.io/ubuntu-slim:0.1",
hamsterLabels, hamsterContainer, nil)
rc.Namespace = f.Namespace.Name
err := testutils.CreateRCWithRetries(f.ClientSet, f.Namespace.Name, rc)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
err = waitForRCPodsRunning(f, rc)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
}
func waitForRCPodsRunning(f *framework.Framework, rc *apiv1.ReplicationController) error {
return wait.PollImmediate(pollInterval, pollTimeout, func() (bool, error) {
podList, err := GetHamsterPods(f)
if err != nil {
framework.Logf("Error listing pods, retrying: %v", err)
return false, nil
}
podsRunning := int32(0)
for _, pod := range podList.Items {
if pod.Status.Phase == apiv1.PodRunning {
podsRunning += 1
}
}
return podsRunning == *rc.Spec.Replicas, nil
})
}
func setupHamsterJob(f *framework.Framework, cpu, memory string, replicas int32) {
job := framework.NewTestJob("notTerminate", "hamster-job", apiv1.RestartPolicyOnFailure,
replicas, replicas, nil, 10)
job.Spec.Template.Spec.Containers[0] = setupHamsterContainer(cpu, memory)
for label, value := range hamsterLabels {
job.Spec.Template.Labels[label] = value
}
err := testutils.CreateJobWithRetries(f.ClientSet, f.Namespace.Name, job)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
err = framework.WaitForAllJobPodsRunning(f.ClientSet, f.Namespace.Name, job.Name, replicas)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
}
func setupHamsterRS(f *framework.Framework, cpu, memory string, replicas int32) {
rs := framework.NewReplicaSet("hamster-rs", f.Namespace.Name, replicas,
hamsterLabels, "", "")
rs.Spec.Template.Spec.Containers[0] = setupHamsterContainer(cpu, memory)
err := createReplicaSetWithRetries(f.ClientSet, f.Namespace.Name, rs)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
err = framework.WaitForReadyReplicaSet(f.ClientSet, f.Namespace.Name, rs.Name)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
}
func setupHamsterStateful(f *framework.Framework, cpu, memory string, replicas int32) {
stateful := framework.NewStatefulSet("hamster-stateful", f.Namespace.Name,
"hamster-service", replicas, nil, nil, hamsterLabels)
stateful.Spec.Template.Spec.Containers[0] = setupHamsterContainer(cpu, memory)
err := createStatefulSetSetWithRetries(f.ClientSet, f.Namespace.Name, stateful)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
tester := framework.NewStatefulSetTester(f.ClientSet)
tester.WaitForRunningAndReady(*stateful.Spec.Replicas, stateful)
}
func setupHamsterContainer(cpu, memory string) apiv1.Container {
cpuQuantity := ParseQuantityOrDie(cpu)
memoryQuantity := ParseQuantityOrDie(memory)
return apiv1.Container{
Name: "hamster",
Image: "k8s.gcr.io/ubuntu-slim:0.1",
Resources: apiv1.ResourceRequirements{
Requests: apiv1.ResourceList{
apiv1.ResourceCPU: cpuQuantity,
apiv1.ResourceMemory: memoryQuantity,
},
},
Command: []string{"/bin/sh"},
Args: []string{"-c", "while true; do sleep 10 ; done"},
}
}
func setupPDB(f *framework.Framework, name string, maxUnavailable int) *policyv1beta1.PodDisruptionBudget {
maxUnavailableIntstr := intstr.FromInt(maxUnavailable)
pdb := &policyv1beta1.PodDisruptionBudget{
ObjectMeta: metav1.ObjectMeta{
Name: name,
},
Spec: policyv1beta1.PodDisruptionBudgetSpec{
MaxUnavailable: &maxUnavailableIntstr,
Selector: &metav1.LabelSelector{
MatchLabels: hamsterLabels,
},
},
}
_, err := f.ClientSet.PolicyV1beta1().PodDisruptionBudgets(f.Namespace.Name).Create(pdb)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
return pdb
}
func getCurrentPodSetForDeployment(c clientset.Interface, d *appsv1.Deployment) PodSet {
podList, err := framework.GetPodsForDeployment(c, d)
gomega.Expect(err).NotTo(gomega.HaveOccurred())
return MakePodSet(podList)
}
func createReplicaSetWithRetries(c clientset.Interface, namespace string, obj *appsv1.ReplicaSet) error {
if obj == nil {
return fmt.Errorf("object provided to create is empty")
}
createFunc := func() (bool, error) {
_, err := c.AppsV1().ReplicaSets(namespace).Create(obj)
if err == nil || apierrs.IsAlreadyExists(err) {
return true, nil
}
if testutils.IsRetryableAPIError(err) {
return false, nil
}
return false, fmt.Errorf("failed to create object with non-retriable error: %v", err)
}
return testutils.RetryWithExponentialBackOff(createFunc)
}
func createStatefulSetSetWithRetries(c clientset.Interface, namespace string, obj *appsv1.StatefulSet) error {
if obj == nil {
return fmt.Errorf("object provided to create is empty")
}
createFunc := func() (bool, error) {
_, err := c.AppsV1().StatefulSets(namespace).Create(obj)
if err == nil || apierrs.IsAlreadyExists(err) {
return true, nil
}
if testutils.IsRetryableAPIError(err) {
return false, nil
}
return false, fmt.Errorf("failed to create object with non-retriable error: %v", err)
}
return testutils.RetryWithExponentialBackOff(createFunc)
}