-
Notifications
You must be signed in to change notification settings - Fork 0
/
apply.go
819 lines (700 loc) · 26.1 KB
/
apply.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
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
/*
Copyright 2014 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 cmd
import (
"fmt"
"io"
"strings"
"time"
"github.com/golang/glog"
"github.com/jonboulle/clockwork"
"github.com/spf13/cobra"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/jsonmergepatch"
"k8s.io/apimachinery/pkg/util/mergepatch"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/strategicpatch"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/cli-runtime/pkg/genericclioptions"
"k8s.io/cli-runtime/pkg/genericclioptions/printers"
"k8s.io/cli-runtime/pkg/genericclioptions/resource"
"k8s.io/client-go/dynamic"
oapi "k8s.io/kube-openapi/pkg/util/proto"
api "k8s.io/kubernetes/pkg/apis/core"
"k8s.io/kubernetes/pkg/kubectl"
"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
"k8s.io/kubernetes/pkg/kubectl/cmd/util/openapi"
"k8s.io/kubernetes/pkg/kubectl/scheme"
"k8s.io/kubernetes/pkg/kubectl/util/i18n"
"k8s.io/kubernetes/pkg/kubectl/validation"
)
type ApplyOptions struct {
RecordFlags *genericclioptions.RecordFlags
Recorder genericclioptions.Recorder
PrintFlags *genericclioptions.PrintFlags
ToPrinter func(string) (printers.ResourcePrinter, error)
DeleteFlags *DeleteFlags
DeleteOptions *DeleteOptions
Selector string
DryRun bool
ServerDryRun bool
Prune bool
PruneResources []pruneResource
cmdBaseName string
All bool
Overwrite bool
OpenApiPatch bool
PruneWhitelist []string
ShouldIncludeUninitialized bool
Validator validation.Schema
Builder *resource.Builder
Mapper meta.RESTMapper
DynamicClient dynamic.Interface
OpenAPISchema openapi.Resources
Namespace string
EnforceNamespace bool
genericclioptions.IOStreams
}
const (
// maxPatchRetry is the maximum number of conflicts retry for during a patch operation before returning failure
maxPatchRetry = 5
// backOffPeriod is the period to back off when apply patch resutls in error.
backOffPeriod = 1 * time.Second
// how many times we can retry before back off
triesBeforeBackOff = 1
)
var (
applyLong = templates.LongDesc(i18n.T(`
Apply a configuration to a resource by filename or stdin.
The resource name must be specified. This resource will be created if it doesn't exist yet.
To use 'apply', always create the resource initially with either 'apply' or 'create --save-config'.
JSON and YAML formats are accepted.
Alpha Disclaimer: the --prune functionality is not yet complete. Do not use unless you are aware of what the current state is. See https://issues.k8s.io/34274.`))
applyExample = templates.Examples(i18n.T(`
# Apply the configuration in pod.json to a pod.
kubectl apply -f ./pod.json
# Apply the JSON passed into stdin to a pod.
cat pod.json | kubectl apply -f -
# Note: --prune is still in Alpha
# Apply the configuration in manifest.yaml that matches label app=nginx and delete all the other resources that are not in the file and match label app=nginx.
kubectl apply --prune -f manifest.yaml -l app=nginx
# Apply the configuration in manifest.yaml and delete all the other configmaps that are not in the file.
kubectl apply --prune -f manifest.yaml --all --prune-whitelist=core/v1/ConfigMap`))
warningNoLastAppliedConfigAnnotation = "Warning: %[1]s apply should be used on resource created by either %[1]s create --save-config or %[1]s apply\n"
)
func NewApplyOptions(ioStreams genericclioptions.IOStreams) *ApplyOptions {
return &ApplyOptions{
RecordFlags: genericclioptions.NewRecordFlags(),
DeleteFlags: NewDeleteFlags("that contains the configuration to apply"),
PrintFlags: genericclioptions.NewPrintFlags("created").WithTypeSetter(scheme.Scheme),
Overwrite: true,
OpenApiPatch: true,
Recorder: genericclioptions.NoopRecorder{},
IOStreams: ioStreams,
}
}
func NewCmdApply(baseName string, f cmdutil.Factory, ioStreams genericclioptions.IOStreams) *cobra.Command {
o := NewApplyOptions(ioStreams)
// Store baseName for use in printing warnings / messages involving the base command name.
// This is useful for downstream command that wrap this one.
o.cmdBaseName = baseName
cmd := &cobra.Command{
Use: "apply -f FILENAME",
DisableFlagsInUseLine: true,
Short: i18n.T("Apply a configuration to a resource by filename or stdin"),
Long: applyLong,
Example: applyExample,
Run: func(cmd *cobra.Command, args []string) {
cmdutil.CheckErr(o.Complete(f, cmd))
cmdutil.CheckErr(validateArgs(cmd, args))
cmdutil.CheckErr(validatePruneAll(o.Prune, o.All, o.Selector))
cmdutil.CheckErr(o.Run())
},
}
// bind flag structs
o.DeleteFlags.AddFlags(cmd)
o.RecordFlags.AddFlags(cmd)
o.PrintFlags.AddFlags(cmd)
cmd.MarkFlagRequired("filename")
cmd.Flags().BoolVar(&o.Overwrite, "overwrite", o.Overwrite, "Automatically resolve conflicts between the modified and live configuration by using values from the modified configuration")
cmd.Flags().BoolVar(&o.Prune, "prune", o.Prune, "Automatically delete resource objects, including the uninitialized ones, that do not appear in the configs and are created by either apply or create --save-config. Should be used with either -l or --all.")
cmdutil.AddValidateFlags(cmd)
cmd.Flags().StringVarP(&o.Selector, "selector", "l", o.Selector, "Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)")
cmd.Flags().BoolVar(&o.All, "all", o.All, "Select all resources in the namespace of the specified resource types.")
cmd.Flags().StringArrayVar(&o.PruneWhitelist, "prune-whitelist", o.PruneWhitelist, "Overwrite the default whitelist with <group/version/kind> for --prune")
cmd.Flags().BoolVar(&o.OpenApiPatch, "openapi-patch", o.OpenApiPatch, "If true, use openapi to calculate diff when the openapi presents and the resource can be found in the openapi spec. Otherwise, fall back to use baked-in types.")
cmd.Flags().BoolVar(&o.ServerDryRun, "server-dry-run", o.ServerDryRun, "If true, request will be sent to server with dry-run flag, which means the modifications won't be persisted. This is an alpha feature and flag.")
cmdutil.AddDryRunFlag(cmd)
cmdutil.AddIncludeUninitializedFlag(cmd)
// apply subcommands
cmd.AddCommand(NewCmdApplyViewLastApplied(f, ioStreams))
cmd.AddCommand(NewCmdApplySetLastApplied(f, ioStreams))
cmd.AddCommand(NewCmdApplyEditLastApplied(f, ioStreams))
return cmd
}
func (o *ApplyOptions) Complete(f cmdutil.Factory, cmd *cobra.Command) error {
o.DryRun = cmdutil.GetDryRunFlag(cmd)
if o.DryRun && o.ServerDryRun {
return fmt.Errorf("--dry-run and --server-dry-run can't be used together")
}
// allow for a success message operation to be specified at print time
o.ToPrinter = func(operation string) (printers.ResourcePrinter, error) {
o.PrintFlags.NamePrintFlags.Operation = operation
if o.DryRun {
o.PrintFlags.Complete("%s (dry run)")
}
if o.ServerDryRun {
o.PrintFlags.Complete("%s (server dry run)")
}
return o.PrintFlags.ToPrinter()
}
var err error
o.RecordFlags.Complete(cmd)
o.Recorder, err = o.RecordFlags.ToRecorder()
if err != nil {
return err
}
dynamicClient, err := f.DynamicClient()
if err != nil {
return err
}
o.DeleteOptions = o.DeleteFlags.ToOptions(dynamicClient, o.IOStreams)
o.ShouldIncludeUninitialized = cmdutil.ShouldIncludeUninitialized(cmd, o.Prune)
o.OpenAPISchema, _ = f.OpenAPISchema()
o.Validator, err = f.Validator(cmdutil.GetFlagBool(cmd, "validate"))
o.Builder = f.NewBuilder()
o.Mapper, err = f.ToRESTMapper()
if err != nil {
return err
}
o.DynamicClient, err = f.DynamicClient()
if err != nil {
return err
}
o.Namespace, o.EnforceNamespace, err = f.ToRawKubeConfigLoader().Namespace()
if err != nil {
return err
}
return nil
}
func validateArgs(cmd *cobra.Command, args []string) error {
if len(args) != 0 {
return cmdutil.UsageErrorf(cmd, "Unexpected args: %v", args)
}
return nil
}
func validatePruneAll(prune, all bool, selector string) error {
if all && len(selector) > 0 {
return fmt.Errorf("cannot set --all and --selector at the same time")
}
if prune && !all && selector == "" {
return fmt.Errorf("all resources selected for prune without explicitly passing --all. To prune all resources, pass the --all flag. If you did not mean to prune all resources, specify a label selector.")
}
return nil
}
func parsePruneResources(mapper meta.RESTMapper, gvks []string) ([]pruneResource, error) {
pruneResources := []pruneResource{}
for _, groupVersionKind := range gvks {
gvk := strings.Split(groupVersionKind, "/")
if len(gvk) != 3 {
return nil, fmt.Errorf("invalid GroupVersionKind format: %v, please follow <group/version/kind>", groupVersionKind)
}
if gvk[0] == "core" {
gvk[0] = ""
}
mapping, err := mapper.RESTMapping(schema.GroupKind{Group: gvk[0], Kind: gvk[2]}, gvk[1])
if err != nil {
return pruneResources, err
}
var namespaced bool
namespaceScope := mapping.Scope.Name()
switch namespaceScope {
case meta.RESTScopeNameNamespace:
namespaced = true
case meta.RESTScopeNameRoot:
namespaced = false
default:
return pruneResources, fmt.Errorf("Unknown namespace scope: %q", namespaceScope)
}
pruneResources = append(pruneResources, pruneResource{gvk[0], gvk[1], gvk[2], namespaced})
}
return pruneResources, nil
}
func (o *ApplyOptions) Run() error {
var openapiSchema openapi.Resources
if o.OpenApiPatch {
openapiSchema = o.OpenAPISchema
}
// include the uninitialized objects by default if --prune is true
// unless explicitly set --include-uninitialized=false
r := o.Builder.
Unstructured().
Schema(o.Validator).
ContinueOnError().
NamespaceParam(o.Namespace).DefaultNamespace().
FilenameParam(o.EnforceNamespace, &o.DeleteOptions.FilenameOptions).
LabelSelectorParam(o.Selector).
IncludeUninitialized(o.ShouldIncludeUninitialized).
Flatten().
Do()
if err := r.Err(); err != nil {
return err
}
var err error
if o.Prune {
o.PruneResources, err = parsePruneResources(o.Mapper, o.PruneWhitelist)
if err != nil {
return err
}
}
output := *o.PrintFlags.OutputFormat
shortOutput := output == "name"
visitedUids := sets.NewString()
visitedNamespaces := sets.NewString()
var objs []runtime.Object
count := 0
err = r.Visit(func(info *resource.Info, err error) error {
if err != nil {
return err
}
if info.Namespaced() {
visitedNamespaces.Insert(info.Namespace)
}
if err := o.Recorder.Record(info.Object); err != nil {
glog.V(4).Infof("error recording current command: %v", err)
}
// Get the modified configuration of the object. Embed the result
// as an annotation in the modified configuration, so that it will appear
// in the patch sent to the server.
modified, err := kubectl.GetModifiedConfiguration(info.Object, true, unstructured.UnstructuredJSONScheme)
if err != nil {
return cmdutil.AddSourceToErr(fmt.Sprintf("retrieving modified configuration from:\n%s\nfor:", info.String()), info.Source, err)
}
// Print object only if output format other than "name" is specified
printObject := len(output) > 0 && !shortOutput
if err := info.Get(); err != nil {
if !errors.IsNotFound(err) {
return cmdutil.AddSourceToErr(fmt.Sprintf("retrieving current configuration of:\n%s\nfrom server for:", info.String()), info.Source, err)
}
// Create the resource if it doesn't exist
// First, update the annotation used by kubectl apply
if err := kubectl.CreateApplyAnnotation(info.Object, unstructured.UnstructuredJSONScheme); err != nil {
return cmdutil.AddSourceToErr("creating", info.Source, err)
}
if !o.DryRun {
// Then create the resource and skip the three-way merge
options := metav1.CreateOptions{}
if o.ServerDryRun {
options.DryRun = []string{metav1.DryRunAll}
}
obj, err := resource.NewHelper(info.Client, info.Mapping).Create(info.Namespace, true, info.Object, &options)
if err != nil {
return cmdutil.AddSourceToErr("creating", info.Source, err)
}
info.Refresh(obj, true)
metadata, err := meta.Accessor(info.Object)
if err != nil {
return err
}
visitedUids.Insert(string(metadata.GetUID()))
}
count++
if printObject {
objs = append(objs, info.Object)
return nil
}
printer, err := o.ToPrinter("created")
if err != nil {
return err
}
return printer.PrintObj(info.Object, o.Out)
}
if !o.DryRun {
metadata, err := meta.Accessor(info.Object)
if err != nil {
return err
}
annotationMap := metadata.GetAnnotations()
if _, ok := annotationMap[api.LastAppliedConfigAnnotation]; !ok {
fmt.Fprintf(o.ErrOut, warningNoLastAppliedConfigAnnotation, o.cmdBaseName)
}
helper := resource.NewHelper(info.Client, info.Mapping)
patcher := &patcher{
mapping: info.Mapping,
helper: helper,
dynamicClient: o.DynamicClient,
overwrite: o.Overwrite,
backOff: clockwork.NewRealClock(),
force: o.DeleteOptions.ForceDeletion,
cascade: o.DeleteOptions.Cascade,
timeout: o.DeleteOptions.Timeout,
gracePeriod: o.DeleteOptions.GracePeriod,
serverDryRun: o.ServerDryRun,
openapiSchema: openapiSchema,
}
patchBytes, patchedObject, err := patcher.patch(info.Object, modified, info.Source, info.Namespace, info.Name, o.ErrOut)
if err != nil {
return cmdutil.AddSourceToErr(fmt.Sprintf("applying patch:\n%s\nto:\n%v\nfor:", patchBytes, info), info.Source, err)
}
info.Refresh(patchedObject, true)
visitedUids.Insert(string(metadata.GetUID()))
if string(patchBytes) == "{}" && !printObject {
count++
printer, err := o.ToPrinter("unchanged")
if err != nil {
return err
}
return printer.PrintObj(info.Object, o.Out)
}
}
count++
if printObject {
objs = append(objs, info.Object)
return nil
}
printer, err := o.ToPrinter("configured")
if err != nil {
return err
}
return printer.PrintObj(info.Object, o.Out)
})
if err != nil {
return err
}
if count == 0 {
return fmt.Errorf("no objects passed to apply")
}
// print objects
if len(objs) > 0 {
printer, err := o.ToPrinter("")
if err != nil {
return err
}
objToPrint := objs[0]
if len(objs) > 1 {
list := &v1.List{
TypeMeta: metav1.TypeMeta{
Kind: "List",
APIVersion: "v1",
},
ListMeta: metav1.ListMeta{},
}
if err := meta.SetList(list, objs); err != nil {
return err
}
objToPrint = list
}
if err := printer.PrintObj(objToPrint, o.Out); err != nil {
return err
}
}
if !o.Prune {
return nil
}
p := pruner{
mapper: o.Mapper,
dynamicClient: o.DynamicClient,
labelSelector: o.Selector,
visitedUids: visitedUids,
cascade: o.DeleteOptions.Cascade,
dryRun: o.DryRun,
serverDryRun: o.ServerDryRun,
gracePeriod: o.DeleteOptions.GracePeriod,
toPrinter: o.ToPrinter,
out: o.Out,
}
namespacedRESTMappings, nonNamespacedRESTMappings, err := getRESTMappings(o.Mapper, &(o.PruneResources))
if err != nil {
return fmt.Errorf("error retrieving RESTMappings to prune: %v", err)
}
for n := range visitedNamespaces {
for _, m := range namespacedRESTMappings {
if err := p.prune(n, m, o.ShouldIncludeUninitialized); err != nil {
return fmt.Errorf("error pruning namespaced object %v: %v", m.GroupVersionKind, err)
}
}
}
for _, m := range nonNamespacedRESTMappings {
if err := p.prune(metav1.NamespaceNone, m, o.ShouldIncludeUninitialized); err != nil {
return fmt.Errorf("error pruning nonNamespaced object %v: %v", m.GroupVersionKind, err)
}
}
return nil
}
type pruneResource struct {
group string
version string
kind string
namespaced bool
}
func (pr pruneResource) String() string {
return fmt.Sprintf("%v/%v, Kind=%v, Namespaced=%v", pr.group, pr.version, pr.kind, pr.namespaced)
}
func getRESTMappings(mapper meta.RESTMapper, pruneResources *[]pruneResource) (namespaced, nonNamespaced []*meta.RESTMapping, err error) {
if len(*pruneResources) == 0 {
// default whitelist
// TODO: need to handle the older api versions - e.g. v1beta1 jobs. Github issue: #35991
*pruneResources = []pruneResource{
{"", "v1", "ConfigMap", true},
{"", "v1", "Endpoints", true},
{"", "v1", "Namespace", false},
{"", "v1", "PersistentVolumeClaim", true},
{"", "v1", "PersistentVolume", false},
{"", "v1", "Pod", true},
{"", "v1", "ReplicationController", true},
{"", "v1", "Secret", true},
{"", "v1", "Service", true},
{"batch", "v1", "Job", true},
{"batch", "v1beta1", "CronJob", true},
{"extensions", "v1beta1", "DaemonSet", true},
{"extensions", "v1beta1", "Deployment", true},
{"extensions", "v1beta1", "Ingress", true},
{"extensions", "v1beta1", "ReplicaSet", true},
{"apps", "v1beta1", "StatefulSet", true},
{"apps", "v1beta1", "Deployment", true},
}
}
for _, resource := range *pruneResources {
addedMapping, err := mapper.RESTMapping(schema.GroupKind{Group: resource.group, Kind: resource.kind}, resource.version)
if err != nil {
return nil, nil, fmt.Errorf("invalid resource %v: %v", resource, err)
}
if resource.namespaced {
namespaced = append(namespaced, addedMapping)
} else {
nonNamespaced = append(nonNamespaced, addedMapping)
}
}
return namespaced, nonNamespaced, nil
}
type pruner struct {
mapper meta.RESTMapper
dynamicClient dynamic.Interface
visitedUids sets.String
labelSelector string
fieldSelector string
cascade bool
serverDryRun bool
dryRun bool
gracePeriod int
toPrinter func(string) (printers.ResourcePrinter, error)
out io.Writer
}
func (p *pruner) prune(namespace string, mapping *meta.RESTMapping, includeUninitialized bool) error {
objList, err := p.dynamicClient.Resource(mapping.Resource).
Namespace(namespace).
List(metav1.ListOptions{
LabelSelector: p.labelSelector,
FieldSelector: p.fieldSelector,
IncludeUninitialized: includeUninitialized,
})
if err != nil {
return err
}
objs, err := meta.ExtractList(objList)
if err != nil {
return err
}
for _, obj := range objs {
metadata, err := meta.Accessor(obj)
if err != nil {
return err
}
annots := metadata.GetAnnotations()
if _, ok := annots[api.LastAppliedConfigAnnotation]; !ok {
// don't prune resources not created with apply
continue
}
uid := metadata.GetUID()
if p.visitedUids.Has(string(uid)) {
continue
}
name := metadata.GetName()
if !p.dryRun {
if err := p.delete(namespace, name, mapping); err != nil {
return err
}
}
printer, err := p.toPrinter("pruned")
if err != nil {
return err
}
printer.PrintObj(obj, p.out)
}
return nil
}
func (p *pruner) delete(namespace, name string, mapping *meta.RESTMapping) error {
return runDelete(namespace, name, mapping, p.dynamicClient, p.cascade, p.gracePeriod, p.serverDryRun)
}
func runDelete(namespace, name string, mapping *meta.RESTMapping, c dynamic.Interface, cascade bool, gracePeriod int, serverDryRun bool) error {
options := &metav1.DeleteOptions{}
if gracePeriod >= 0 {
options = metav1.NewDeleteOptions(int64(gracePeriod))
}
if serverDryRun {
options.DryRun = []string{metav1.DryRunAll}
}
policy := metav1.DeletePropagationForeground
if !cascade {
policy = metav1.DeletePropagationOrphan
}
options.PropagationPolicy = &policy
return c.Resource(mapping.Resource).Namespace(namespace).Delete(name, options)
}
func (p *patcher) delete(namespace, name string) error {
return runDelete(namespace, name, p.mapping, p.dynamicClient, p.cascade, p.gracePeriod, p.serverDryRun)
}
type patcher struct {
mapping *meta.RESTMapping
helper *resource.Helper
dynamicClient dynamic.Interface
overwrite bool
backOff clockwork.Clock
force bool
cascade bool
timeout time.Duration
gracePeriod int
serverDryRun bool
openapiSchema openapi.Resources
}
func (p *patcher) patchSimple(obj runtime.Object, modified []byte, source, namespace, name string, errOut io.Writer) ([]byte, runtime.Object, error) {
// Serialize the current configuration of the object from the server.
current, err := runtime.Encode(unstructured.UnstructuredJSONScheme, obj)
if err != nil {
return nil, nil, cmdutil.AddSourceToErr(fmt.Sprintf("serializing current configuration from:\n%v\nfor:", obj), source, err)
}
// Retrieve the original configuration of the object from the annotation.
original, err := kubectl.GetOriginalConfiguration(obj)
if err != nil {
return nil, nil, cmdutil.AddSourceToErr(fmt.Sprintf("retrieving original configuration from:\n%v\nfor:", obj), source, err)
}
var patchType types.PatchType
var patch []byte
var lookupPatchMeta strategicpatch.LookupPatchMeta
var schema oapi.Schema
createPatchErrFormat := "creating patch with:\noriginal:\n%s\nmodified:\n%s\ncurrent:\n%s\nfor:"
// Create the versioned struct from the type defined in the restmapping
// (which is the API version we'll be submitting the patch to)
versionedObject, err := scheme.Scheme.New(p.mapping.GroupVersionKind)
switch {
case runtime.IsNotRegisteredError(err):
// fall back to generic JSON merge patch
patchType = types.MergePatchType
preconditions := []mergepatch.PreconditionFunc{mergepatch.RequireKeyUnchanged("apiVersion"),
mergepatch.RequireKeyUnchanged("kind"), mergepatch.RequireMetadataKeyUnchanged("name")}
patch, err = jsonmergepatch.CreateThreeWayJSONMergePatch(original, modified, current, preconditions...)
if err != nil {
if mergepatch.IsPreconditionFailed(err) {
return nil, nil, fmt.Errorf("%s", "At least one of apiVersion, kind and name was changed")
}
return nil, nil, cmdutil.AddSourceToErr(fmt.Sprintf(createPatchErrFormat, original, modified, current), source, err)
}
case err != nil:
return nil, nil, cmdutil.AddSourceToErr(fmt.Sprintf("getting instance of versioned object for %v:", p.mapping.GroupVersionKind), source, err)
case err == nil:
// Compute a three way strategic merge patch to send to server.
patchType = types.StrategicMergePatchType
// Try to use openapi first if the openapi spec is available and can successfully calculate the patch.
// Otherwise, fall back to baked-in types.
if p.openapiSchema != nil {
if schema = p.openapiSchema.LookupResource(p.mapping.GroupVersionKind); schema != nil {
lookupPatchMeta = strategicpatch.PatchMetaFromOpenAPI{Schema: schema}
if openapiPatch, err := strategicpatch.CreateThreeWayMergePatch(original, modified, current, lookupPatchMeta, p.overwrite); err != nil {
fmt.Fprintf(errOut, "warning: error calculating patch from openapi spec: %v\n", err)
} else {
patchType = types.StrategicMergePatchType
patch = openapiPatch
}
}
}
if patch == nil {
lookupPatchMeta, err = strategicpatch.NewPatchMetaFromStruct(versionedObject)
if err != nil {
return nil, nil, cmdutil.AddSourceToErr(fmt.Sprintf(createPatchErrFormat, original, modified, current), source, err)
}
patch, err = strategicpatch.CreateThreeWayMergePatch(original, modified, current, lookupPatchMeta, p.overwrite)
if err != nil {
return nil, nil, cmdutil.AddSourceToErr(fmt.Sprintf(createPatchErrFormat, original, modified, current), source, err)
}
}
}
if string(patch) == "{}" {
return patch, obj, nil
}
options := metav1.UpdateOptions{}
if p.serverDryRun {
options.DryRun = []string{metav1.DryRunAll}
}
patchedObj, err := p.helper.Patch(namespace, name, patchType, patch, &options)
return patch, patchedObj, err
}
func (p *patcher) patch(current runtime.Object, modified []byte, source, namespace, name string, errOut io.Writer) ([]byte, runtime.Object, error) {
var getErr error
patchBytes, patchObject, err := p.patchSimple(current, modified, source, namespace, name, errOut)
for i := 1; i <= maxPatchRetry && errors.IsConflict(err); i++ {
if i > triesBeforeBackOff {
p.backOff.Sleep(backOffPeriod)
}
current, getErr = p.helper.Get(namespace, name, false)
if getErr != nil {
return nil, nil, getErr
}
patchBytes, patchObject, err = p.patchSimple(current, modified, source, namespace, name, errOut)
}
if err != nil && (errors.IsConflict(err) || errors.IsInvalid(err)) && p.force {
patchBytes, patchObject, err = p.deleteAndCreate(current, modified, namespace, name)
}
return patchBytes, patchObject, err
}
func (p *patcher) deleteAndCreate(original runtime.Object, modified []byte, namespace, name string) ([]byte, runtime.Object, error) {
if err := p.delete(namespace, name); err != nil {
return modified, nil, err
}
// TODO: use wait
if err := wait.PollImmediate(1*time.Second, p.timeout, func() (bool, error) {
if _, err := p.helper.Get(namespace, name, false); !errors.IsNotFound(err) {
return false, err
}
return true, nil
}); err != nil {
return modified, nil, err
}
versionedObject, _, err := unstructured.UnstructuredJSONScheme.Decode(modified, nil, nil)
if err != nil {
return modified, nil, err
}
options := metav1.CreateOptions{}
if p.serverDryRun {
options.DryRun = []string{metav1.DryRunAll}
}
createdObject, err := p.helper.Create(namespace, true, versionedObject, &options)
if err != nil {
// restore the original object if we fail to create the new one
// but still propagate and advertise error to user
recreated, recreateErr := p.helper.Create(namespace, true, original, &options)
if recreateErr != nil {
err = fmt.Errorf("An error occurred force-replacing the existing object with the newly provided one:\n\n%v.\n\nAdditionally, an error occurred attempting to restore the original object:\n\n%v\n", err, recreateErr)
} else {
createdObject = recreated
}
}
return modified, createdObject, err
}