forked from k3s-io/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 0
/
azure_backoff.go
598 lines (503 loc) · 21.9 KB
/
azure_backoff.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
/*
Copyright 2017 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 azure
import (
"fmt"
"net/http"
"github.com/Azure/azure-sdk-for-go/services/compute/mgmt/2019-03-01/compute"
"github.com/Azure/azure-sdk-for-go/services/network/mgmt/2018-07-01/network"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/wait"
cloudprovider "k8s.io/cloud-provider"
"k8s.io/klog"
)
// requestBackoff if backoff is disabled in cloud provider it
// returns a new Backoff object steps = 1
// This is to make sure that the requested command executes
// at least once
func (az *Cloud) requestBackoff() (resourceRequestBackoff wait.Backoff) {
if az.CloudProviderBackoff {
return az.resourceRequestBackoff
}
resourceRequestBackoff = wait.Backoff{
Steps: 1,
}
return resourceRequestBackoff
}
// Event creates a event for the specified object.
func (az *Cloud) Event(obj runtime.Object, eventtype, reason, message string) {
if obj != nil && reason != "" {
az.eventRecorder.Event(obj, eventtype, reason, message)
}
}
// GetVirtualMachineWithRetry invokes az.getVirtualMachine with exponential backoff retry
func (az *Cloud) GetVirtualMachineWithRetry(name types.NodeName) (compute.VirtualMachine, error) {
var machine compute.VirtualMachine
var retryErr error
err := wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
machine, retryErr = az.getVirtualMachine(name)
if retryErr == cloudprovider.InstanceNotFound {
return true, cloudprovider.InstanceNotFound
}
if retryErr != nil {
klog.Errorf("GetVirtualMachineWithRetry(%s): backoff failure, will retry, err=%v", name, retryErr)
return false, nil
}
klog.V(2).Infof("GetVirtualMachineWithRetry(%s): backoff success", name)
return true, nil
})
if err == wait.ErrWaitTimeout {
err = retryErr
}
return machine, err
}
// ListVirtualMachinesWithRetry invokes az.VirtualMachinesClient.List with exponential backoff retry
func (az *Cloud) ListVirtualMachinesWithRetry(resourceGroup string) ([]compute.VirtualMachine, error) {
allNodes := []compute.VirtualMachine{}
err := wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
var retryErr error
ctx, cancel := getContextWithCancel()
defer cancel()
allNodes, retryErr = az.VirtualMachinesClient.List(ctx, resourceGroup)
if retryErr != nil {
klog.Errorf("VirtualMachinesClient.List(%v) - backoff: failure, will retry,err=%v",
resourceGroup,
retryErr)
return false, retryErr
}
klog.V(2).Infof("VirtualMachinesClient.List(%v) - backoff: success", resourceGroup)
return true, nil
})
if err != nil {
return nil, err
}
return allNodes, err
}
// ListVirtualMachines invokes az.VirtualMachinesClient.List with exponential backoff retry
func (az *Cloud) ListVirtualMachines(resourceGroup string) ([]compute.VirtualMachine, error) {
if az.Config.shouldOmitCloudProviderBackoff() {
ctx, cancel := getContextWithCancel()
defer cancel()
allNodes, err := az.VirtualMachinesClient.List(ctx, resourceGroup)
if err != nil {
klog.Errorf("VirtualMachinesClient.List(%v) failure with err=%v", resourceGroup, err)
return nil, err
}
klog.V(2).Infof("VirtualMachinesClient.List(%v) success", resourceGroup)
return allNodes, nil
}
return az.ListVirtualMachinesWithRetry(resourceGroup)
}
func (az *Cloud) getIPForMachine(nodeName types.NodeName) (string, string, error) {
if az.Config.shouldOmitCloudProviderBackoff() {
return az.vmSet.GetIPByNodeName(string(nodeName))
}
return az.GetIPForMachineWithRetry(nodeName)
}
// GetIPForMachineWithRetry invokes az.getIPForMachine with exponential backoff retry
func (az *Cloud) GetIPForMachineWithRetry(name types.NodeName) (string, string, error) {
var ip, publicIP string
err := wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
var retryErr error
ip, publicIP, retryErr = az.vmSet.GetIPByNodeName(string(name))
if retryErr != nil {
klog.Errorf("GetIPForMachineWithRetry(%s): backoff failure, will retry,err=%v", name, retryErr)
return false, nil
}
klog.V(2).Infof("GetIPForMachineWithRetry(%s): backoff success", name)
return true, nil
})
return ip, publicIP, err
}
// CreateOrUpdateSecurityGroup invokes az.SecurityGroupsClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) CreateOrUpdateSecurityGroup(service *v1.Service, sg network.SecurityGroup) error {
if az.Config.shouldOmitCloudProviderBackoff() {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.SecurityGroupsClient.CreateOrUpdate(ctx, az.ResourceGroup, *sg.Name, sg)
klog.V(10).Infof("SecurityGroupsClient.CreateOrUpdate(%s): end", *sg.Name)
if err == nil {
if isSuccessHTTPResponse(resp) {
// Invalidate the cache right after updating
az.nsgCache.Delete(*sg.Name)
} else if resp != nil {
return fmt.Errorf("HTTP response %q", resp.Status)
}
}
return err
}
return az.CreateOrUpdateSGWithRetry(service, sg)
}
// CreateOrUpdateSGWithRetry invokes az.SecurityGroupsClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) CreateOrUpdateSGWithRetry(service *v1.Service, sg network.SecurityGroup) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.SecurityGroupsClient.CreateOrUpdate(ctx, az.ResourceGroup, *sg.Name, sg)
klog.V(10).Infof("SecurityGroupsClient.CreateOrUpdate(%s): end", *sg.Name)
done, err := az.processHTTPRetryResponse(service, "CreateOrUpdateSecurityGroup", resp, err)
if done && err == nil {
// Invalidate the cache right after updating
az.nsgCache.Delete(*sg.Name)
}
return done, err
})
}
// CreateOrUpdateLB invokes az.LoadBalancerClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) CreateOrUpdateLB(service *v1.Service, lb network.LoadBalancer) error {
if az.Config.shouldOmitCloudProviderBackoff() {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.LoadBalancerClient.CreateOrUpdate(ctx, az.ResourceGroup, *lb.Name, lb)
klog.V(10).Infof("LoadBalancerClient.CreateOrUpdate(%s): end", *lb.Name)
if err == nil {
if isSuccessHTTPResponse(resp) {
// Invalidate the cache right after updating
az.lbCache.Delete(*lb.Name)
} else if resp != nil {
return fmt.Errorf("HTTP response %q", resp.Status)
}
}
return err
}
return az.createOrUpdateLBWithRetry(service, lb)
}
// createOrUpdateLBWithRetry invokes az.LoadBalancerClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) createOrUpdateLBWithRetry(service *v1.Service, lb network.LoadBalancer) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.LoadBalancerClient.CreateOrUpdate(ctx, az.ResourceGroup, *lb.Name, lb)
klog.V(10).Infof("LoadBalancerClient.CreateOrUpdate(%s): end", *lb.Name)
done, err := az.processHTTPRetryResponse(service, "CreateOrUpdateLoadBalancer", resp, err)
if done && err == nil {
// Invalidate the cache right after updating
az.lbCache.Delete(*lb.Name)
}
return done, err
})
}
// ListLB invokes az.LoadBalancerClient.List with exponential backoff retry
func (az *Cloud) ListLB(service *v1.Service) ([]network.LoadBalancer, error) {
if az.Config.shouldOmitCloudProviderBackoff() {
ctx, cancel := getContextWithCancel()
defer cancel()
allLBs, err := az.LoadBalancerClient.List(ctx, az.ResourceGroup)
if err != nil {
az.Event(service, v1.EventTypeWarning, "ListLoadBalancers", err.Error())
klog.Errorf("LoadBalancerClient.List(%v) failure with err=%v", az.ResourceGroup, err)
return nil, err
}
klog.V(2).Infof("LoadBalancerClient.List(%v) success", az.ResourceGroup)
return allLBs, nil
}
return az.listLBWithRetry(service)
}
// listLBWithRetry invokes az.LoadBalancerClient.List with exponential backoff retry
func (az *Cloud) listLBWithRetry(service *v1.Service) ([]network.LoadBalancer, error) {
var allLBs []network.LoadBalancer
err := wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
var retryErr error
ctx, cancel := getContextWithCancel()
defer cancel()
allLBs, retryErr = az.LoadBalancerClient.List(ctx, az.ResourceGroup)
if retryErr != nil {
az.Event(service, v1.EventTypeWarning, "ListLoadBalancers", retryErr.Error())
klog.Errorf("LoadBalancerClient.List(%v) - backoff: failure, will retry,err=%v",
az.ResourceGroup,
retryErr)
return false, retryErr
}
klog.V(2).Infof("LoadBalancerClient.List(%v) - backoff: success", az.ResourceGroup)
return true, nil
})
if err != nil {
return nil, err
}
return allLBs, nil
}
// ListPIP list the PIP resources in the given resource group
func (az *Cloud) ListPIP(service *v1.Service, pipResourceGroup string) ([]network.PublicIPAddress, error) {
if az.Config.shouldOmitCloudProviderBackoff() {
ctx, cancel := getContextWithCancel()
defer cancel()
allPIPs, err := az.PublicIPAddressesClient.List(ctx, pipResourceGroup)
if err != nil {
az.Event(service, v1.EventTypeWarning, "ListPublicIPs", err.Error())
klog.Errorf("PublicIPAddressesClient.List(%v) failure with err=%v", pipResourceGroup, err)
return nil, err
}
klog.V(2).Infof("PublicIPAddressesClient.List(%v) success", pipResourceGroup)
return allPIPs, nil
}
return az.listPIPWithRetry(service, pipResourceGroup)
}
// listPIPWithRetry list the PIP resources in the given resource group
func (az *Cloud) listPIPWithRetry(service *v1.Service, pipResourceGroup string) ([]network.PublicIPAddress, error) {
var allPIPs []network.PublicIPAddress
err := wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
var retryErr error
ctx, cancel := getContextWithCancel()
defer cancel()
allPIPs, retryErr = az.PublicIPAddressesClient.List(ctx, pipResourceGroup)
if retryErr != nil {
az.Event(service, v1.EventTypeWarning, "ListPublicIPs", retryErr.Error())
klog.Errorf("PublicIPAddressesClient.List(%v) - backoff: failure, will retry,err=%v",
pipResourceGroup,
retryErr)
return false, retryErr
}
klog.V(2).Infof("PublicIPAddressesClient.List(%v) - backoff: success", pipResourceGroup)
return true, nil
})
if err != nil {
return nil, err
}
return allPIPs, nil
}
// CreateOrUpdatePIP invokes az.PublicIPAddressesClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) CreateOrUpdatePIP(service *v1.Service, pipResourceGroup string, pip network.PublicIPAddress) error {
if az.Config.shouldOmitCloudProviderBackoff() {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.PublicIPAddressesClient.CreateOrUpdate(ctx, pipResourceGroup, *pip.Name, pip)
klog.V(10).Infof("PublicIPAddressesClient.CreateOrUpdate(%s, %s): end", pipResourceGroup, *pip.Name)
return az.processHTTPResponse(service, "CreateOrUpdatePublicIPAddress", resp, err)
}
return az.createOrUpdatePIPWithRetry(service, pipResourceGroup, pip)
}
// createOrUpdatePIPWithRetry invokes az.PublicIPAddressesClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) createOrUpdatePIPWithRetry(service *v1.Service, pipResourceGroup string, pip network.PublicIPAddress) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.PublicIPAddressesClient.CreateOrUpdate(ctx, pipResourceGroup, *pip.Name, pip)
klog.V(10).Infof("PublicIPAddressesClient.CreateOrUpdate(%s, %s): end", pipResourceGroup, *pip.Name)
return az.processHTTPRetryResponse(service, "CreateOrUpdatePublicIPAddress", resp, err)
})
}
// CreateOrUpdateInterface invokes az.PublicIPAddressesClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) CreateOrUpdateInterface(service *v1.Service, nic network.Interface) error {
if az.Config.shouldOmitCloudProviderBackoff() {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.InterfacesClient.CreateOrUpdate(ctx, az.ResourceGroup, *nic.Name, nic)
klog.V(10).Infof("InterfacesClient.CreateOrUpdate(%s): end", *nic.Name)
return az.processHTTPResponse(service, "CreateOrUpdateInterface", resp, err)
}
return az.createOrUpdateInterfaceWithRetry(service, nic)
}
// createOrUpdateInterfaceWithRetry invokes az.PublicIPAddressesClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) createOrUpdateInterfaceWithRetry(service *v1.Service, nic network.Interface) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.InterfacesClient.CreateOrUpdate(ctx, az.ResourceGroup, *nic.Name, nic)
klog.V(10).Infof("InterfacesClient.CreateOrUpdate(%s): end", *nic.Name)
return az.processHTTPRetryResponse(service, "CreateOrUpdateInterface", resp, err)
})
}
// DeletePublicIP invokes az.PublicIPAddressesClient.Delete with exponential backoff retry
func (az *Cloud) DeletePublicIP(service *v1.Service, pipResourceGroup string, pipName string) error {
if az.Config.shouldOmitCloudProviderBackoff() {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.PublicIPAddressesClient.Delete(ctx, pipResourceGroup, pipName)
return az.processHTTPResponse(service, "DeletePublicIPAddress", resp, err)
}
return az.deletePublicIPWithRetry(service, pipResourceGroup, pipName)
}
// deletePublicIPWithRetry invokes az.PublicIPAddressesClient.Delete with exponential backoff retry
func (az *Cloud) deletePublicIPWithRetry(service *v1.Service, pipResourceGroup string, pipName string) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.PublicIPAddressesClient.Delete(ctx, pipResourceGroup, pipName)
return az.processHTTPRetryResponse(service, "DeletePublicIPAddress", resp, err)
})
}
// DeleteLB invokes az.LoadBalancerClient.Delete with exponential backoff retry
func (az *Cloud) DeleteLB(service *v1.Service, lbName string) error {
if az.Config.shouldOmitCloudProviderBackoff() {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.LoadBalancerClient.Delete(ctx, az.ResourceGroup, lbName)
if err == nil {
if isSuccessHTTPResponse(resp) {
// Invalidate the cache right after updating
az.lbCache.Delete(lbName)
} else if resp != nil {
return fmt.Errorf("HTTP response %q", resp.Status)
}
}
return err
}
return az.deleteLBWithRetry(service, lbName)
}
// deleteLBWithRetry invokes az.LoadBalancerClient.Delete with exponential backoff retry
func (az *Cloud) deleteLBWithRetry(service *v1.Service, lbName string) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.LoadBalancerClient.Delete(ctx, az.ResourceGroup, lbName)
done, err := az.processHTTPRetryResponse(service, "DeleteLoadBalancer", resp, err)
if done && err == nil {
// Invalidate the cache right after deleting
az.lbCache.Delete(lbName)
}
return done, err
})
}
// CreateOrUpdateRouteTable invokes az.RouteTablesClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) CreateOrUpdateRouteTable(routeTable network.RouteTable) error {
if az.Config.shouldOmitCloudProviderBackoff() {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.RouteTablesClient.CreateOrUpdate(ctx, az.ResourceGroup, az.RouteTableName, routeTable)
return az.processHTTPResponse(nil, "", resp, err)
}
return az.createOrUpdateRouteTableWithRetry(routeTable)
}
// createOrUpdateRouteTableWithRetry invokes az.RouteTablesClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) createOrUpdateRouteTableWithRetry(routeTable network.RouteTable) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.RouteTablesClient.CreateOrUpdate(ctx, az.ResourceGroup, az.RouteTableName, routeTable)
return az.processHTTPRetryResponse(nil, "", resp, err)
})
}
// CreateOrUpdateRoute invokes az.RoutesClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) CreateOrUpdateRoute(route network.Route) error {
if az.Config.shouldOmitCloudProviderBackoff() {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.RoutesClient.CreateOrUpdate(ctx, az.ResourceGroup, az.RouteTableName, *route.Name, route)
klog.V(10).Infof("RoutesClient.CreateOrUpdate(%s): end", *route.Name)
return az.processHTTPResponse(nil, "", resp, err)
}
return az.createOrUpdateRouteWithRetry(route)
}
// createOrUpdateRouteWithRetry invokes az.RoutesClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) createOrUpdateRouteWithRetry(route network.Route) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.RoutesClient.CreateOrUpdate(ctx, az.ResourceGroup, az.RouteTableName, *route.Name, route)
klog.V(10).Infof("RoutesClient.CreateOrUpdate(%s): end", *route.Name)
return az.processHTTPRetryResponse(nil, "", resp, err)
})
}
// DeleteRouteWithName invokes az.RoutesClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) DeleteRouteWithName(routeName string) error {
if az.Config.shouldOmitCloudProviderBackoff() {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.RoutesClient.Delete(ctx, az.ResourceGroup, az.RouteTableName, routeName)
klog.V(10).Infof("RoutesClient.Delete(%s,%s): end", az.RouteTableName, routeName)
return az.processHTTPResponse(nil, "", resp, err)
}
return az.deleteRouteWithRetry(routeName)
}
// deleteRouteWithRetry invokes az.RoutesClient.Delete with exponential backoff retry
func (az *Cloud) deleteRouteWithRetry(routeName string) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.RoutesClient.Delete(ctx, az.ResourceGroup, az.RouteTableName, routeName)
klog.V(10).Infof("RoutesClient.Delete(%s,%s): end", az.RouteTableName, routeName)
return az.processHTTPRetryResponse(nil, "", resp, err)
})
}
// CreateOrUpdateVMWithRetry invokes az.VirtualMachinesClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) CreateOrUpdateVMWithRetry(resourceGroup, vmName string, newVM compute.VirtualMachine) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.VirtualMachinesClient.CreateOrUpdate(ctx, resourceGroup, vmName, newVM)
klog.V(10).Infof("VirtualMachinesClient.CreateOrUpdate(%s): end", vmName)
return az.processHTTPRetryResponse(nil, "", resp, err)
})
}
// UpdateVmssVMWithRetry invokes az.VirtualMachineScaleSetVMsClient.Update with exponential backoff retry
func (az *Cloud) UpdateVmssVMWithRetry(resourceGroupName string, VMScaleSetName string, instanceID string, parameters compute.VirtualMachineScaleSetVM) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
ctx, cancel := getContextWithCancel()
defer cancel()
resp, err := az.VirtualMachineScaleSetVMsClient.Update(ctx, resourceGroupName, VMScaleSetName, instanceID, parameters)
klog.V(10).Infof("VirtualMachinesClient.CreateOrUpdate(%s,%s): end", VMScaleSetName, instanceID)
return az.processHTTPRetryResponse(nil, "", resp, err)
})
}
// isSuccessHTTPResponse determines if the response from an HTTP request suggests success
func isSuccessHTTPResponse(resp *http.Response) bool {
if resp == nil {
return false
}
// HTTP 2xx suggests a successful response
if 199 < resp.StatusCode && resp.StatusCode < 300 {
return true
}
return false
}
func shouldRetryHTTPRequest(resp *http.Response, err error) bool {
if err != nil {
return true
}
if resp != nil {
// HTTP 4xx or 5xx suggests we should retry
if 399 < resp.StatusCode && resp.StatusCode < 600 {
return true
}
}
return false
}
// processHTTPRetryResponse : return true means stop retry, false means continue retry
func (az *Cloud) processHTTPRetryResponse(service *v1.Service, reason string, resp *http.Response, err error) (bool, error) {
if err == nil && resp != nil && isSuccessHTTPResponse(resp) {
// HTTP 2xx suggests a successful response
return true, nil
}
if shouldRetryHTTPRequest(resp, err) {
if err != nil {
az.Event(service, v1.EventTypeWarning, reason, err.Error())
klog.Errorf("processHTTPRetryResponse: backoff failure, will retry, err=%v", err)
} else {
az.Event(service, v1.EventTypeWarning, reason, fmt.Sprintf("Azure HTTP response %d", resp.StatusCode))
klog.Errorf("processHTTPRetryResponse: backoff failure, will retry, HTTP response=%d", resp.StatusCode)
}
// suppress the error object so that backoff process continues
return false, nil
}
// Fall-through: stop periodic backoff
return true, nil
}
func (az *Cloud) processHTTPResponse(service *v1.Service, reason string, resp *http.Response, err error) error {
if err == nil && isSuccessHTTPResponse(resp) {
// HTTP 2xx suggests a successful response
return nil
}
if err != nil {
az.Event(service, v1.EventTypeWarning, reason, err.Error())
klog.Errorf("processHTTPRetryResponse failure with err: %v", err)
} else if resp != nil {
az.Event(service, v1.EventTypeWarning, reason, fmt.Sprintf("Azure HTTP response %d", resp.StatusCode))
klog.Errorf("processHTTPRetryResponse failure with HTTP response %q", resp.Status)
}
return err
}
func (cfg *Config) shouldOmitCloudProviderBackoff() bool {
return cfg.CloudProviderBackoffMode == backoffModeV2
}