forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 1
/
sync.go
539 lines (474 loc) · 23.7 KB
/
sync.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
/*
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 deployment
import (
"fmt"
"reflect"
"sort"
"strconv"
"github.com/golang/glog"
apps "k8s.io/api/apps/v1"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/rand"
"k8s.io/kubernetes/pkg/controller"
deploymentutil "k8s.io/kubernetes/pkg/controller/deployment/util"
labelsutil "k8s.io/kubernetes/pkg/util/labels"
)
// syncStatusOnly only updates Deployments Status and doesn't take any mutating actions.
func (dc *DeploymentController) syncStatusOnly(d *apps.Deployment, rsList []*apps.ReplicaSet, podMap map[types.UID]*v1.PodList) error {
newRS, oldRSs, err := dc.getAllReplicaSetsAndSyncRevision(d, rsList, podMap, false)
if err != nil {
return err
}
allRSs := append(oldRSs, newRS)
return dc.syncDeploymentStatus(allRSs, newRS, d)
}
// sync is responsible for reconciling deployments on scaling events or when they
// are paused.
func (dc *DeploymentController) sync(d *apps.Deployment, rsList []*apps.ReplicaSet, podMap map[types.UID]*v1.PodList) error {
newRS, oldRSs, err := dc.getAllReplicaSetsAndSyncRevision(d, rsList, podMap, false)
if err != nil {
return err
}
if err := dc.scale(d, newRS, oldRSs); err != nil {
// If we get an error while trying to scale, the deployment will be requeued
// so we can abort this resync
return err
}
// Clean up the deployment when it's paused and no rollback is in flight.
if d.Spec.Paused && getRollbackTo(d) == nil {
if err := dc.cleanupDeployment(oldRSs, d); err != nil {
return err
}
}
allRSs := append(oldRSs, newRS)
return dc.syncDeploymentStatus(allRSs, newRS, d)
}
// checkPausedConditions checks if the given deployment is paused or not and adds an appropriate condition.
// These conditions are needed so that we won't accidentally report lack of progress for resumed deployments
// that were paused for longer than progressDeadlineSeconds.
func (dc *DeploymentController) checkPausedConditions(d *apps.Deployment) error {
if d.Spec.ProgressDeadlineSeconds == nil {
return nil
}
cond := deploymentutil.GetDeploymentCondition(d.Status, apps.DeploymentProgressing)
if cond != nil && cond.Reason == deploymentutil.TimedOutReason {
// If we have reported lack of progress, do not overwrite it with a paused condition.
return nil
}
pausedCondExists := cond != nil && cond.Reason == deploymentutil.PausedDeployReason
needsUpdate := false
if d.Spec.Paused && !pausedCondExists {
condition := deploymentutil.NewDeploymentCondition(apps.DeploymentProgressing, v1.ConditionUnknown, deploymentutil.PausedDeployReason, "Deployment is paused")
deploymentutil.SetDeploymentCondition(&d.Status, *condition)
needsUpdate = true
} else if !d.Spec.Paused && pausedCondExists {
condition := deploymentutil.NewDeploymentCondition(apps.DeploymentProgressing, v1.ConditionUnknown, deploymentutil.ResumedDeployReason, "Deployment is resumed")
deploymentutil.SetDeploymentCondition(&d.Status, *condition)
needsUpdate = true
}
if !needsUpdate {
return nil
}
var err error
d, err = dc.client.AppsV1().Deployments(d.Namespace).UpdateStatus(d)
return err
}
// getAllReplicaSetsAndSyncRevision returns all the replica sets for the provided deployment (new and all old), with new RS's and deployment's revision updated.
//
// rsList should come from getReplicaSetsForDeployment(d).
// podMap should come from getPodMapForDeployment(d, rsList).
//
// 1. Get all old RSes this deployment targets, and calculate the max revision number among them (maxOldV).
// 2. Get new RS this deployment targets (whose pod template matches deployment's), and update new RS's revision number to (maxOldV + 1),
// only if its revision number is smaller than (maxOldV + 1). If this step failed, we'll update it in the next deployment sync loop.
// 3. Copy new RS's revision number to deployment (update deployment's revision). If this step failed, we'll update it in the next deployment sync loop.
//
// Note that currently the deployment controller is using caches to avoid querying the server for reads.
// This may lead to stale reads of replica sets, thus incorrect deployment status.
func (dc *DeploymentController) getAllReplicaSetsAndSyncRevision(d *apps.Deployment, rsList []*apps.ReplicaSet, podMap map[types.UID]*v1.PodList, createIfNotExisted bool) (*apps.ReplicaSet, []*apps.ReplicaSet, error) {
_, allOldRSs := deploymentutil.FindOldReplicaSets(d, rsList)
// Get new replica set with the updated revision number
newRS, err := dc.getNewReplicaSet(d, rsList, allOldRSs, createIfNotExisted)
if err != nil {
return nil, nil, err
}
return newRS, allOldRSs, nil
}
// Returns a replica set that matches the intent of the given deployment. Returns nil if the new replica set doesn't exist yet.
// 1. Get existing new RS (the RS that the given deployment targets, whose pod template is the same as deployment's).
// 2. If there's existing new RS, update its revision number if it's smaller than (maxOldRevision + 1), where maxOldRevision is the max revision number among all old RSes.
// 3. If there's no existing new RS and createIfNotExisted is true, create one with appropriate revision number (maxOldRevision + 1) and replicas.
// Note that the pod-template-hash will be added to adopted RSes and pods.
func (dc *DeploymentController) getNewReplicaSet(d *apps.Deployment, rsList, oldRSs []*apps.ReplicaSet, createIfNotExisted bool) (*apps.ReplicaSet, error) {
existingNewRS := deploymentutil.FindNewReplicaSet(d, rsList)
// Calculate the max revision number among all old RSes
maxOldRevision := deploymentutil.MaxRevision(oldRSs)
// Calculate revision number for this new replica set
newRevision := strconv.FormatInt(maxOldRevision+1, 10)
// Latest replica set exists. We need to sync its annotations (includes copying all but
// annotationsToSkip from the parent deployment, and update revision, desiredReplicas,
// and maxReplicas) and also update the revision annotation in the deployment with the
// latest revision.
if existingNewRS != nil {
rsCopy := existingNewRS.DeepCopy()
// Set existing new replica set's annotation
annotationsUpdated := deploymentutil.SetNewReplicaSetAnnotations(d, rsCopy, newRevision, true)
minReadySecondsNeedsUpdate := rsCopy.Spec.MinReadySeconds != d.Spec.MinReadySeconds
if annotationsUpdated || minReadySecondsNeedsUpdate {
rsCopy.Spec.MinReadySeconds = d.Spec.MinReadySeconds
return dc.client.AppsV1().ReplicaSets(rsCopy.ObjectMeta.Namespace).Update(rsCopy)
}
// Should use the revision in existingNewRS's annotation, since it set by before
needsUpdate := deploymentutil.SetDeploymentRevision(d, rsCopy.Annotations[deploymentutil.RevisionAnnotation])
// If no other Progressing condition has been recorded and we need to estimate the progress
// of this deployment then it is likely that old users started caring about progress. In that
// case we need to take into account the first time we noticed their new replica set.
cond := deploymentutil.GetDeploymentCondition(d.Status, apps.DeploymentProgressing)
if d.Spec.ProgressDeadlineSeconds != nil && cond == nil {
msg := fmt.Sprintf("Found new replica set %q", rsCopy.Name)
condition := deploymentutil.NewDeploymentCondition(apps.DeploymentProgressing, v1.ConditionTrue, deploymentutil.FoundNewRSReason, msg)
deploymentutil.SetDeploymentCondition(&d.Status, *condition)
needsUpdate = true
}
if needsUpdate {
var err error
if d, err = dc.client.AppsV1().Deployments(d.Namespace).UpdateStatus(d); err != nil {
return nil, err
}
}
return rsCopy, nil
}
if !createIfNotExisted {
return nil, nil
}
// new ReplicaSet does not exist, create one.
newRSTemplate := *d.Spec.Template.DeepCopy()
podTemplateSpecHash := fmt.Sprintf("%d", controller.ComputeHash(&newRSTemplate, d.Status.CollisionCount))
newRSTemplate.Labels = labelsutil.CloneAndAddLabel(d.Spec.Template.Labels, apps.DefaultDeploymentUniqueLabelKey, podTemplateSpecHash)
// Add podTemplateHash label to selector.
newRSSelector := labelsutil.CloneSelectorAndAddLabel(d.Spec.Selector, apps.DefaultDeploymentUniqueLabelKey, podTemplateSpecHash)
// Create new ReplicaSet
newRS := apps.ReplicaSet{
ObjectMeta: metav1.ObjectMeta{
// Make the name deterministic, to ensure idempotence
Name: d.Name + "-" + rand.SafeEncodeString(podTemplateSpecHash),
Namespace: d.Namespace,
OwnerReferences: []metav1.OwnerReference{*metav1.NewControllerRef(d, controllerKind)},
Labels: newRSTemplate.Labels,
},
Spec: apps.ReplicaSetSpec{
Replicas: new(int32),
MinReadySeconds: d.Spec.MinReadySeconds,
Selector: newRSSelector,
Template: newRSTemplate,
},
}
allRSs := append(oldRSs, &newRS)
newReplicasCount, err := deploymentutil.NewRSNewReplicas(d, allRSs, &newRS)
if err != nil {
return nil, err
}
*(newRS.Spec.Replicas) = newReplicasCount
// Set new replica set's annotation
deploymentutil.SetNewReplicaSetAnnotations(d, &newRS, newRevision, false)
// Create the new ReplicaSet. If it already exists, then we need to check for possible
// hash collisions. If there is any other error, we need to report it in the status of
// the Deployment.
alreadyExists := false
createdRS, err := dc.client.AppsV1().ReplicaSets(d.Namespace).Create(&newRS)
switch {
// We may end up hitting this due to a slow cache or a fast resync of the Deployment.
case errors.IsAlreadyExists(err):
alreadyExists = true
// Fetch a copy of the ReplicaSet.
rs, rsErr := dc.rsLister.ReplicaSets(newRS.Namespace).Get(newRS.Name)
if rsErr != nil {
return nil, rsErr
}
// If the Deployment owns the ReplicaSet and the ReplicaSet's PodTemplateSpec is semantically
// deep equal to the PodTemplateSpec of the Deployment, it's the Deployment's new ReplicaSet.
// Otherwise, this is a hash collision and we need to increment the collisionCount field in
// the status of the Deployment and requeue to try the creation in the next sync.
controllerRef := metav1.GetControllerOf(rs)
if controllerRef != nil && controllerRef.UID == d.UID && deploymentutil.EqualIgnoreHash(&d.Spec.Template, &rs.Spec.Template) {
createdRS = rs
err = nil
break
}
// Matching ReplicaSet is not equal - increment the collisionCount in the DeploymentStatus
// and requeue the Deployment.
if d.Status.CollisionCount == nil {
d.Status.CollisionCount = new(int32)
}
preCollisionCount := *d.Status.CollisionCount
*d.Status.CollisionCount++
// Update the collisionCount for the Deployment and let it requeue by returning the original
// error.
_, dErr := dc.client.AppsV1().Deployments(d.Namespace).UpdateStatus(d)
if dErr == nil {
glog.V(2).Infof("Found a hash collision for deployment %q - bumping collisionCount (%d->%d) to resolve it", d.Name, preCollisionCount, *d.Status.CollisionCount)
}
return nil, err
case err != nil:
msg := fmt.Sprintf("Failed to create new replica set %q: %v", newRS.Name, err)
if d.Spec.ProgressDeadlineSeconds != nil {
cond := deploymentutil.NewDeploymentCondition(apps.DeploymentProgressing, v1.ConditionFalse, deploymentutil.FailedRSCreateReason, msg)
deploymentutil.SetDeploymentCondition(&d.Status, *cond)
// We don't really care about this error at this point, since we have a bigger issue to report.
// TODO: Identify which errors are permanent and switch DeploymentIsFailed to take into account
// these reasons as well. Related issue: https://github.com/kubernetes/kubernetes/issues/18568
_, _ = dc.client.AppsV1().Deployments(d.Namespace).UpdateStatus(d)
}
dc.eventRecorder.Eventf(d, v1.EventTypeWarning, deploymentutil.FailedRSCreateReason, msg)
return nil, err
}
if !alreadyExists && newReplicasCount > 0 {
dc.eventRecorder.Eventf(d, v1.EventTypeNormal, "ScalingReplicaSet", "Scaled up replica set %s to %d", createdRS.Name, newReplicasCount)
}
needsUpdate := deploymentutil.SetDeploymentRevision(d, newRevision)
if !alreadyExists && d.Spec.ProgressDeadlineSeconds != nil {
msg := fmt.Sprintf("Created new replica set %q", createdRS.Name)
condition := deploymentutil.NewDeploymentCondition(apps.DeploymentProgressing, v1.ConditionTrue, deploymentutil.NewReplicaSetReason, msg)
deploymentutil.SetDeploymentCondition(&d.Status, *condition)
needsUpdate = true
}
if needsUpdate {
_, err = dc.client.AppsV1().Deployments(d.Namespace).UpdateStatus(d)
}
return createdRS, err
}
// scale scales proportionally in order to mitigate risk. Otherwise, scaling up can increase the size
// of the new replica set and scaling down can decrease the sizes of the old ones, both of which would
// have the effect of hastening the rollout progress, which could produce a higher proportion of unavailable
// replicas in the event of a problem with the rolled out template. Should run only on scaling events or
// when a deployment is paused and not during the normal rollout process.
func (dc *DeploymentController) scale(deployment *apps.Deployment, newRS *apps.ReplicaSet, oldRSs []*apps.ReplicaSet) error {
// If there is only one active replica set then we should scale that up to the full count of the
// deployment. If there is no active replica set, then we should scale up the newest replica set.
if activeOrLatest := deploymentutil.FindActiveOrLatest(newRS, oldRSs); activeOrLatest != nil {
if *(activeOrLatest.Spec.Replicas) == *(deployment.Spec.Replicas) {
return nil
}
_, _, err := dc.scaleReplicaSetAndRecordEvent(activeOrLatest, *(deployment.Spec.Replicas), deployment)
return err
}
// If the new replica set is saturated, old replica sets should be fully scaled down.
// This case handles replica set adoption during a saturated new replica set.
if deploymentutil.IsSaturated(deployment, newRS) {
for _, old := range controller.FilterActiveReplicaSets(oldRSs) {
if _, _, err := dc.scaleReplicaSetAndRecordEvent(old, 0, deployment); err != nil {
return err
}
}
return nil
}
// There are old replica sets with pods and the new replica set is not saturated.
// We need to proportionally scale all replica sets (new and old) in case of a
// rolling deployment.
if deploymentutil.IsRollingUpdate(deployment) {
allRSs := controller.FilterActiveReplicaSets(append(oldRSs, newRS))
allRSsReplicas := deploymentutil.GetReplicaCountForReplicaSets(allRSs)
allowedSize := int32(0)
if *(deployment.Spec.Replicas) > 0 {
allowedSize = *(deployment.Spec.Replicas) + deploymentutil.MaxSurge(*deployment)
}
// Number of additional replicas that can be either added or removed from the total
// replicas count. These replicas should be distributed proportionally to the active
// replica sets.
deploymentReplicasToAdd := allowedSize - allRSsReplicas
// The additional replicas should be distributed proportionally amongst the active
// replica sets from the larger to the smaller in size replica set. Scaling direction
// drives what happens in case we are trying to scale replica sets of the same size.
// In such a case when scaling up, we should scale up newer replica sets first, and
// when scaling down, we should scale down older replica sets first.
var scalingOperation string
switch {
case deploymentReplicasToAdd > 0:
sort.Sort(controller.ReplicaSetsBySizeNewer(allRSs))
scalingOperation = "up"
case deploymentReplicasToAdd < 0:
sort.Sort(controller.ReplicaSetsBySizeOlder(allRSs))
scalingOperation = "down"
}
// Iterate over all active replica sets and estimate proportions for each of them.
// The absolute value of deploymentReplicasAdded should never exceed the absolute
// value of deploymentReplicasToAdd.
deploymentReplicasAdded := int32(0)
nameToSize := make(map[string]int32)
for i := range allRSs {
rs := allRSs[i]
// Estimate proportions if we have replicas to add, otherwise simply populate
// nameToSize with the current sizes for each replica set.
if deploymentReplicasToAdd != 0 {
proportion := deploymentutil.GetProportion(rs, *deployment, deploymentReplicasToAdd, deploymentReplicasAdded)
nameToSize[rs.Name] = *(rs.Spec.Replicas) + proportion
deploymentReplicasAdded += proportion
} else {
nameToSize[rs.Name] = *(rs.Spec.Replicas)
}
}
// Update all replica sets
for i := range allRSs {
rs := allRSs[i]
// Add/remove any leftovers to the largest replica set.
if i == 0 && deploymentReplicasToAdd != 0 {
leftover := deploymentReplicasToAdd - deploymentReplicasAdded
nameToSize[rs.Name] = nameToSize[rs.Name] + leftover
if nameToSize[rs.Name] < 0 {
nameToSize[rs.Name] = 0
}
}
// TODO: Use transactions when we have them.
if _, _, err := dc.scaleReplicaSet(rs, nameToSize[rs.Name], deployment, scalingOperation); err != nil {
// Return as soon as we fail, the deployment is requeued
return err
}
}
}
return nil
}
func (dc *DeploymentController) scaleReplicaSetAndRecordEvent(rs *apps.ReplicaSet, newScale int32, deployment *apps.Deployment) (bool, *apps.ReplicaSet, error) {
// No need to scale
if *(rs.Spec.Replicas) == newScale {
return false, rs, nil
}
var scalingOperation string
if *(rs.Spec.Replicas) < newScale {
scalingOperation = "up"
} else {
scalingOperation = "down"
}
scaled, newRS, err := dc.scaleReplicaSet(rs, newScale, deployment, scalingOperation)
return scaled, newRS, err
}
func (dc *DeploymentController) scaleReplicaSet(rs *apps.ReplicaSet, newScale int32, deployment *apps.Deployment, scalingOperation string) (bool, *apps.ReplicaSet, error) {
sizeNeedsUpdate := *(rs.Spec.Replicas) != newScale
annotationsNeedUpdate := deploymentutil.ReplicasAnnotationsNeedUpdate(rs, *(deployment.Spec.Replicas), *(deployment.Spec.Replicas)+deploymentutil.MaxSurge(*deployment))
scaled := false
var err error
if sizeNeedsUpdate || annotationsNeedUpdate {
rsCopy := rs.DeepCopy()
*(rsCopy.Spec.Replicas) = newScale
deploymentutil.SetReplicasAnnotations(rsCopy, *(deployment.Spec.Replicas), *(deployment.Spec.Replicas)+deploymentutil.MaxSurge(*deployment))
rs, err = dc.client.AppsV1().ReplicaSets(rsCopy.Namespace).Update(rsCopy)
if err == nil && sizeNeedsUpdate {
scaled = true
dc.eventRecorder.Eventf(deployment, v1.EventTypeNormal, "ScalingReplicaSet", "Scaled %s replica set %s to %d", scalingOperation, rs.Name, newScale)
}
}
return scaled, rs, err
}
// cleanupDeployment is responsible for cleaning up a deployment ie. retains all but the latest N old replica sets
// where N=d.Spec.RevisionHistoryLimit. Old replica sets are older versions of the podtemplate of a deployment kept
// around by default 1) for historical reasons and 2) for the ability to rollback a deployment.
func (dc *DeploymentController) cleanupDeployment(oldRSs []*apps.ReplicaSet, deployment *apps.Deployment) error {
if deployment.Spec.RevisionHistoryLimit == nil {
return nil
}
// Avoid deleting replica set with deletion timestamp set
aliveFilter := func(rs *apps.ReplicaSet) bool {
return rs != nil && rs.ObjectMeta.DeletionTimestamp == nil
}
cleanableRSes := controller.FilterReplicaSets(oldRSs, aliveFilter)
diff := int32(len(cleanableRSes)) - *deployment.Spec.RevisionHistoryLimit
if diff <= 0 {
return nil
}
sort.Sort(controller.ReplicaSetsByCreationTimestamp(cleanableRSes))
glog.V(4).Infof("Looking to cleanup old replica sets for deployment %q", deployment.Name)
for i := int32(0); i < diff; i++ {
rs := cleanableRSes[i]
// Avoid delete replica set with non-zero replica counts
if rs.Status.Replicas != 0 || *(rs.Spec.Replicas) != 0 || rs.Generation > rs.Status.ObservedGeneration || rs.DeletionTimestamp != nil {
continue
}
glog.V(4).Infof("Trying to cleanup replica set %q for deployment %q", rs.Name, deployment.Name)
if err := dc.client.AppsV1().ReplicaSets(rs.Namespace).Delete(rs.Name, nil); err != nil && !errors.IsNotFound(err) {
// Return error instead of aggregating and continuing DELETEs on the theory
// that we may be overloading the api server.
return err
}
}
return nil
}
// syncDeploymentStatus checks if the status is up-to-date and sync it if necessary
func (dc *DeploymentController) syncDeploymentStatus(allRSs []*apps.ReplicaSet, newRS *apps.ReplicaSet, d *apps.Deployment) error {
newStatus := calculateStatus(allRSs, newRS, d)
if reflect.DeepEqual(d.Status, newStatus) {
return nil
}
newDeployment := d
newDeployment.Status = newStatus
_, err := dc.client.AppsV1().Deployments(newDeployment.Namespace).UpdateStatus(newDeployment)
return err
}
// calculateStatus calculates the latest status for the provided deployment by looking into the provided replica sets.
func calculateStatus(allRSs []*apps.ReplicaSet, newRS *apps.ReplicaSet, deployment *apps.Deployment) apps.DeploymentStatus {
availableReplicas := deploymentutil.GetAvailableReplicaCountForReplicaSets(allRSs)
totalReplicas := deploymentutil.GetReplicaCountForReplicaSets(allRSs)
unavailableReplicas := totalReplicas - availableReplicas
// If unavailableReplicas is negative, then that means the Deployment has more available replicas running than
// desired, e.g. whenever it scales down. In such a case we should simply default unavailableReplicas to zero.
if unavailableReplicas < 0 {
unavailableReplicas = 0
}
status := apps.DeploymentStatus{
// TODO: Ensure that if we start retrying status updates, we won't pick up a new Generation value.
ObservedGeneration: deployment.Generation,
Replicas: deploymentutil.GetActualReplicaCountForReplicaSets(allRSs),
UpdatedReplicas: deploymentutil.GetActualReplicaCountForReplicaSets([]*apps.ReplicaSet{newRS}),
ReadyReplicas: deploymentutil.GetReadyReplicaCountForReplicaSets(allRSs),
AvailableReplicas: availableReplicas,
UnavailableReplicas: unavailableReplicas,
CollisionCount: deployment.Status.CollisionCount,
}
// Copy conditions one by one so we won't mutate the original object.
conditions := deployment.Status.Conditions
for i := range conditions {
status.Conditions = append(status.Conditions, conditions[i])
}
if availableReplicas >= *(deployment.Spec.Replicas)-deploymentutil.MaxUnavailable(*deployment) {
minAvailability := deploymentutil.NewDeploymentCondition(apps.DeploymentAvailable, v1.ConditionTrue, deploymentutil.MinimumReplicasAvailable, "Deployment has minimum availability.")
deploymentutil.SetDeploymentCondition(&status, *minAvailability)
} else {
noMinAvailability := deploymentutil.NewDeploymentCondition(apps.DeploymentAvailable, v1.ConditionFalse, deploymentutil.MinimumReplicasUnavailable, "Deployment does not have minimum availability.")
deploymentutil.SetDeploymentCondition(&status, *noMinAvailability)
}
return status
}
// isScalingEvent checks whether the provided deployment has been updated with a scaling event
// by looking at the desired-replicas annotation in the active replica sets of the deployment.
//
// rsList should come from getReplicaSetsForDeployment(d).
// podMap should come from getPodMapForDeployment(d, rsList).
func (dc *DeploymentController) isScalingEvent(d *apps.Deployment, rsList []*apps.ReplicaSet, podMap map[types.UID]*v1.PodList) (bool, error) {
newRS, oldRSs, err := dc.getAllReplicaSetsAndSyncRevision(d, rsList, podMap, false)
if err != nil {
return false, err
}
allRSs := append(oldRSs, newRS)
for _, rs := range controller.FilterActiveReplicaSets(allRSs) {
desired, ok := deploymentutil.GetDesiredReplicasAnnotation(rs)
if !ok {
continue
}
if desired != *(d.Spec.Replicas) {
return true, nil
}
}
return false, nil
}