forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 0
/
azure_backoff.go
425 lines (388 loc) · 16.5 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
/*
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 (
"k8s.io/apimachinery/pkg/util/wait"
"github.com/Azure/azure-sdk-for-go/arm/compute"
"github.com/Azure/azure-sdk-for-go/arm/network"
"github.com/Azure/go-autorest/autorest"
"github.com/golang/glog"
"k8s.io/apimachinery/pkg/types"
)
// 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
}
// 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 != nil {
glog.Errorf("backoff: failure, will retry,err=%v", retryErr)
return false, nil
}
glog.V(2).Infof("backoff: success")
return true, nil
})
if err == wait.ErrWaitTimeout {
err = retryErr
}
return machine, err
}
// GetScaleSetsVMWithRetry invokes az.getScaleSetsVM with exponential backoff retry
func (az *Cloud) GetScaleSetsVMWithRetry(name types.NodeName) (compute.VirtualMachineScaleSetVM, bool, error) {
var machine compute.VirtualMachineScaleSetVM
var exists bool
err := wait.ExponentialBackoff(az.resourceRequestBackoff, func() (bool, error) {
var retryErr error
machine, exists, retryErr = az.getVmssVirtualMachine(name)
if retryErr != nil {
glog.Errorf("GetScaleSetsVMWithRetry backoff: failure, will retry,err=%v", retryErr)
return false, nil
}
glog.V(10).Infof("GetScaleSetsVMWithRetry backoff: success")
return true, nil
})
return machine, exists, err
}
// VirtualMachineClientListWithRetry invokes az.VirtualMachinesClient.List with exponential backoff retry
func (az *Cloud) VirtualMachineClientListWithRetry() ([]compute.VirtualMachine, error) {
allNodes := []compute.VirtualMachine{}
var result compute.VirtualMachineListResult
err := wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
var retryErr error
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("VirtualMachinesClient.List(%v): start", az.ResourceGroup)
result, retryErr = az.VirtualMachinesClient.List(az.ResourceGroup)
glog.V(10).Infof("VirtualMachinesClient.List(%v): end", az.ResourceGroup)
if retryErr != nil {
glog.Errorf("VirtualMachinesClient.List(%v) - backoff: failure, will retry,err=%v",
az.ResourceGroup,
retryErr)
return false, retryErr
}
glog.V(2).Infof("VirtualMachinesClient.List(%v) - backoff: success", az.ResourceGroup)
return true, nil
})
if err != nil {
return nil, err
}
appendResults := (result.Value != nil && len(*result.Value) > 0)
for appendResults {
allNodes = append(allNodes, *result.Value...)
appendResults = false
// follow the next link to get all the vms for resource group
if result.NextLink != nil {
err := wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
var retryErr error
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("VirtualMachinesClient.ListNextResults(%v): start", az.ResourceGroup)
result, retryErr = az.VirtualMachinesClient.ListNextResults(result)
glog.V(10).Infof("VirtualMachinesClient.ListNextResults(%v): end", az.ResourceGroup)
if retryErr != nil {
glog.Errorf("VirtualMachinesClient.ListNextResults(%v) - backoff: failure, will retry,err=%v",
az.ResourceGroup, retryErr)
return false, retryErr
}
glog.V(2).Infof("VirtualMachinesClient.ListNextResults(%v): success", az.ResourceGroup)
return true, nil
})
if err != nil {
return allNodes, err
}
appendResults = (result.Value != nil && len(*result.Value) > 0)
}
}
return allNodes, err
}
// 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.getIPForMachine(name)
if retryErr != nil {
glog.Errorf("backoff: failure, will retry,err=%v", retryErr)
return false, nil
}
glog.V(2).Infof("backoff: success")
return true, nil
})
return ip, publicIP, err
}
// CreateOrUpdateSGWithRetry invokes az.SecurityGroupsClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) CreateOrUpdateSGWithRetry(sg network.SecurityGroup) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("SecurityGroupsClient.CreateOrUpdate(%s): start", *sg.Name)
respChan, errChan := az.SecurityGroupsClient.CreateOrUpdate(az.ResourceGroup, *sg.Name, sg, nil)
resp := <-respChan
err := <-errChan
glog.V(10).Infof("SecurityGroupsClient.CreateOrUpdate(%s): end", *sg.Name)
return processRetryResponse(resp.Response, err)
})
}
// CreateOrUpdateLBWithRetry invokes az.LoadBalancerClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) CreateOrUpdateLBWithRetry(lb network.LoadBalancer) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("LoadBalancerClient.CreateOrUpdate(%s): start", *lb.Name)
respChan, errChan := az.LoadBalancerClient.CreateOrUpdate(az.ResourceGroup, *lb.Name, lb, nil)
resp := <-respChan
err := <-errChan
glog.V(10).Infof("LoadBalancerClient.CreateOrUpdate(%s): end", *lb.Name)
return processRetryResponse(resp.Response, err)
})
}
// ListLBWithRetry invokes az.LoadBalancerClient.List with exponential backoff retry
func (az *Cloud) ListLBWithRetry() ([]network.LoadBalancer, error) {
allLBs := []network.LoadBalancer{}
var result network.LoadBalancerListResult
err := wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
var retryErr error
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("LoadBalancerClient.List(%v): start", az.ResourceGroup)
result, retryErr = az.LoadBalancerClient.List(az.ResourceGroup)
glog.V(10).Infof("LoadBalancerClient.List(%v): end", az.ResourceGroup)
if retryErr != nil {
glog.Errorf("LoadBalancerClient.List(%v) - backoff: failure, will retry,err=%v",
az.ResourceGroup,
retryErr)
return false, retryErr
}
glog.V(2).Infof("LoadBalancerClient.List(%v) - backoff: success", az.ResourceGroup)
return true, nil
})
if err != nil {
return nil, err
}
appendResults := (result.Value != nil && len(*result.Value) > 0)
for appendResults {
allLBs = append(allLBs, *result.Value...)
appendResults = false
// follow the next link to get all the vms for resource group
if result.NextLink != nil {
err := wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
var retryErr error
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("LoadBalancerClient.ListNextResults(%v): start", az.ResourceGroup)
result, retryErr = az.LoadBalancerClient.ListNextResults(result)
glog.V(10).Infof("LoadBalancerClient.ListNextResults(%v): end", az.ResourceGroup)
if retryErr != nil {
glog.Errorf("LoadBalancerClient.ListNextResults(%v) - backoff: failure, will retry,err=%v",
az.ResourceGroup,
retryErr)
return false, retryErr
}
glog.V(2).Infof("LoadBalancerClient.ListNextResults(%v) - backoff: success", az.ResourceGroup)
return true, nil
})
if err != nil {
return allLBs, err
}
appendResults = (result.Value != nil && len(*result.Value) > 0)
}
}
return allLBs, nil
}
// ListPIPWithRetry list the PIP resources in az.ResourceGroup
func (az *Cloud) ListPIPWithRetry() ([]network.PublicIPAddress, error) {
allPIPs := []network.PublicIPAddress{}
var result network.PublicIPAddressListResult
err := wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
var retryErr error
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("PublicIPAddressesClient.List(%v): start", az.ResourceGroup)
result, retryErr = az.PublicIPAddressesClient.List(az.ResourceGroup)
glog.V(10).Infof("PublicIPAddressesClient.List(%v): end", az.ResourceGroup)
if retryErr != nil {
glog.Errorf("PublicIPAddressesClient.List(%v) - backoff: failure, will retry,err=%v",
az.ResourceGroup,
retryErr)
return false, retryErr
}
glog.V(2).Infof("PublicIPAddressesClient.List(%v) - backoff: success", az.ResourceGroup)
return true, nil
})
if err != nil {
return nil, err
}
appendResults := (result.Value != nil && len(*result.Value) > 0)
for appendResults {
allPIPs = append(allPIPs, *result.Value...)
appendResults = false
// follow the next link to get all the vms for resource group
if result.NextLink != nil {
err := wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
var retryErr error
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("PublicIPAddressesClient.ListNextResults(%v): start", az.ResourceGroup)
result, retryErr = az.PublicIPAddressesClient.ListNextResults(result)
glog.V(10).Infof("PublicIPAddressesClient.ListNextResults(%v): end", az.ResourceGroup)
if retryErr != nil {
glog.Errorf("PublicIPAddressesClient.ListNextResults(%v) - backoff: failure, will retry,err=%v",
az.ResourceGroup,
retryErr)
return false, retryErr
}
glog.V(2).Infof("PublicIPAddressesClient.ListNextResults(%v) - backoff: success", az.ResourceGroup)
return true, nil
})
if err != nil {
return allPIPs, err
}
appendResults = (result.Value != nil && len(*result.Value) > 0)
}
}
return allPIPs, nil
}
// CreateOrUpdatePIPWithRetry invokes az.PublicIPAddressesClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) CreateOrUpdatePIPWithRetry(pip network.PublicIPAddress) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("PublicIPAddressesClient.CreateOrUpdate(%s): start", *pip.Name)
respChan, errChan := az.PublicIPAddressesClient.CreateOrUpdate(az.ResourceGroup, *pip.Name, pip, nil)
resp := <-respChan
err := <-errChan
glog.V(10).Infof("PublicIPAddressesClient.CreateOrUpdate(%s): end", *pip.Name)
return processRetryResponse(resp.Response, err)
})
}
// CreateOrUpdateInterfaceWithRetry invokes az.PublicIPAddressesClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) CreateOrUpdateInterfaceWithRetry(nic network.Interface) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("InterfacesClient.CreateOrUpdate(%s): start", *nic.Name)
respChan, errChan := az.InterfacesClient.CreateOrUpdate(az.ResourceGroup, *nic.Name, nic, nil)
resp := <-respChan
err := <-errChan
glog.V(10).Infof("InterfacesClient.CreateOrUpdate(%s): end", *nic.Name)
return processRetryResponse(resp.Response, err)
})
}
// DeletePublicIPWithRetry invokes az.PublicIPAddressesClient.Delete with exponential backoff retry
func (az *Cloud) DeletePublicIPWithRetry(pipName string) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("PublicIPAddressesClient.Delete(%s): start", pipName)
respChan, errChan := az.PublicIPAddressesClient.Delete(az.ResourceGroup, pipName, nil)
resp := <-respChan
err := <-errChan
glog.V(10).Infof("PublicIPAddressesClient.Delete(%s): end", pipName)
return processRetryResponse(resp, err)
})
}
// DeleteLBWithRetry invokes az.LoadBalancerClient.Delete with exponential backoff retry
func (az *Cloud) DeleteLBWithRetry(lbName string) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("LoadBalancerClient.Delete(%s): start", lbName)
respChan, errChan := az.LoadBalancerClient.Delete(az.ResourceGroup, lbName, nil)
resp := <-respChan
err := <-errChan
glog.V(10).Infof("LoadBalancerClient.Delete(%s): end", lbName)
return processRetryResponse(resp, err)
})
}
// 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) {
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("RouteTablesClient.CreateOrUpdate(%s): start", *routeTable.Name)
respChan, errChan := az.RouteTablesClient.CreateOrUpdate(az.ResourceGroup, az.RouteTableName, routeTable, nil)
resp := <-respChan
err := <-errChan
glog.V(10).Infof("RouteTablesClient.CreateOrUpdate(%s): end", *routeTable.Name)
return processRetryResponse(resp.Response, err)
})
}
// 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) {
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("RoutesClient.CreateOrUpdate(%s): start", *route.Name)
respChan, errChan := az.RoutesClient.CreateOrUpdate(az.ResourceGroup, az.RouteTableName, *route.Name, route, nil)
resp := <-respChan
err := <-errChan
glog.V(10).Infof("RoutesClient.CreateOrUpdate(%s): end", *route.Name)
return processRetryResponse(resp.Response, err)
})
}
// DeleteRouteWithRetry invokes az.RoutesClient.Delete with exponential backoff retry
func (az *Cloud) DeleteRouteWithRetry(routeName string) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("RoutesClient.Delete(%s): start", az.RouteTableName)
respChan, errChan := az.RoutesClient.Delete(az.ResourceGroup, az.RouteTableName, routeName, nil)
resp := <-respChan
err := <-errChan
glog.V(10).Infof("RoutesClient.Delete(%s): end", az.RouteTableName)
return processRetryResponse(resp, err)
})
}
// CreateOrUpdateVMWithRetry invokes az.VirtualMachinesClient.CreateOrUpdate with exponential backoff retry
func (az *Cloud) CreateOrUpdateVMWithRetry(vmName string, newVM compute.VirtualMachine) error {
return wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
az.operationPollRateLimiter.Accept()
glog.V(10).Infof("VirtualMachinesClient.CreateOrUpdate(%s): start", vmName)
respChan, errChan := az.VirtualMachinesClient.CreateOrUpdate(az.ResourceGroup, vmName, newVM, nil)
resp := <-respChan
err := <-errChan
glog.V(10).Infof("VirtualMachinesClient.CreateOrUpdate(%s): end", vmName)
return processRetryResponse(resp.Response, err)
})
}
// A wait.ConditionFunc function to deal with common HTTP backoff response conditions
func processRetryResponse(resp autorest.Response, err error) (bool, error) {
if isSuccessHTTPResponse(resp) {
glog.V(2).Infof("backoff: success, HTTP response=%d", resp.StatusCode)
return true, nil
}
if shouldRetryAPIRequest(resp, err) {
glog.Errorf("backoff: failure, will retry, HTTP response=%d, err=%v", resp.StatusCode, err)
// suppress the error object so that backoff process continues
return false, nil
}
// Fall-through: stop periodic backoff, return error object from most recent request
return true, err
}
// shouldRetryAPIRequest determines if the response from an HTTP request suggests periodic retry behavior
func shouldRetryAPIRequest(resp autorest.Response, err error) bool {
if err != nil {
return true
}
// HTTP 4xx or 5xx suggests we should retry
if 399 < resp.StatusCode && resp.StatusCode < 600 {
return true
}
return false
}
// isSuccessHTTPResponse determines if the response from an HTTP request suggests success
func isSuccessHTTPResponse(resp autorest.Response) bool {
// HTTP 2xx suggests a successful response
if 199 < resp.StatusCode && resp.StatusCode < 300 {
return true
}
return false
}