-
Notifications
You must be signed in to change notification settings - Fork 541
/
validation.go
320 lines (274 loc) · 13.5 KB
/
validation.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
/*
Copyright 2015 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 validation
import (
"fmt"
"regexp"
"unicode"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/validation"
"k8s.io/apimachinery/pkg/util/validation/field"
)
// LabelSelectorValidationOptions is a struct that can be passed to ValidateLabelSelector to record the validate options
type LabelSelectorValidationOptions struct {
// Allow invalid label value in selector
AllowInvalidLabelValueInSelector bool
}
// LabelSelectorHasInvalidLabelValue returns true if the given selector contains an invalid label value in a match expression.
// This is useful for determining whether AllowInvalidLabelValueInSelector should be set to true when validating an update
// based on existing persisted invalid values.
func LabelSelectorHasInvalidLabelValue(ps *metav1.LabelSelector) bool {
if ps == nil {
return false
}
for _, e := range ps.MatchExpressions {
for _, v := range e.Values {
if len(validation.IsValidLabelValue(v)) > 0 {
return true
}
}
}
return false
}
// ValidateLabelSelector validate the LabelSelector according to the opts and returns any validation errors.
// opts.AllowInvalidLabelValueInSelector is only expected to be set to true when required for backwards compatibility with existing invalid data.
func ValidateLabelSelector(ps *metav1.LabelSelector, opts LabelSelectorValidationOptions, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if ps == nil {
return allErrs
}
allErrs = append(allErrs, ValidateLabels(ps.MatchLabels, fldPath.Child("matchLabels"))...)
for i, expr := range ps.MatchExpressions {
allErrs = append(allErrs, ValidateLabelSelectorRequirement(expr, opts, fldPath.Child("matchExpressions").Index(i))...)
}
return allErrs
}
// ValidateLabelSelectorRequirement validate the requirement according to the opts and returns any validation errors.
// opts.AllowInvalidLabelValueInSelector is only expected to be set to true when required for backwards compatibility with existing invalid data.
func ValidateLabelSelectorRequirement(sr metav1.LabelSelectorRequirement, opts LabelSelectorValidationOptions, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
switch sr.Operator {
case metav1.LabelSelectorOpIn, metav1.LabelSelectorOpNotIn:
if len(sr.Values) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("values"), "must be specified when `operator` is 'In' or 'NotIn'"))
}
case metav1.LabelSelectorOpExists, metav1.LabelSelectorOpDoesNotExist:
if len(sr.Values) > 0 {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("values"), "may not be specified when `operator` is 'Exists' or 'DoesNotExist'"))
}
default:
allErrs = append(allErrs, field.Invalid(fldPath.Child("operator"), sr.Operator, "not a valid selector operator"))
}
allErrs = append(allErrs, ValidateLabelName(sr.Key, fldPath.Child("key"))...)
if !opts.AllowInvalidLabelValueInSelector {
for valueIndex, value := range sr.Values {
for _, msg := range validation.IsValidLabelValue(value) {
allErrs = append(allErrs, field.Invalid(fldPath.Child("values").Index(valueIndex), value, msg))
}
}
}
return allErrs
}
// ValidateLabelName validates that the label name is correctly defined.
func ValidateLabelName(labelName string, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
for _, msg := range validation.IsQualifiedName(labelName) {
allErrs = append(allErrs, field.Invalid(fldPath, labelName, msg))
}
return allErrs
}
// ValidateLabels validates that a set of labels are correctly defined.
func ValidateLabels(labels map[string]string, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
for k, v := range labels {
allErrs = append(allErrs, ValidateLabelName(k, fldPath)...)
for _, msg := range validation.IsValidLabelValue(v) {
allErrs = append(allErrs, field.Invalid(fldPath, v, msg))
}
}
return allErrs
}
func ValidateDeleteOptions(options *metav1.DeleteOptions) field.ErrorList {
allErrs := field.ErrorList{}
//lint:file-ignore SA1019 Keep validation for deprecated OrphanDependents option until it's being removed
if options.OrphanDependents != nil && options.PropagationPolicy != nil {
allErrs = append(allErrs, field.Invalid(field.NewPath("propagationPolicy"), options.PropagationPolicy, "orphanDependents and deletionPropagation cannot be both set"))
}
if options.PropagationPolicy != nil &&
*options.PropagationPolicy != metav1.DeletePropagationForeground &&
*options.PropagationPolicy != metav1.DeletePropagationBackground &&
*options.PropagationPolicy != metav1.DeletePropagationOrphan {
allErrs = append(allErrs, field.NotSupported(field.NewPath("propagationPolicy"), options.PropagationPolicy, []string{string(metav1.DeletePropagationForeground), string(metav1.DeletePropagationBackground), string(metav1.DeletePropagationOrphan), "nil"}))
}
allErrs = append(allErrs, ValidateDryRun(field.NewPath("dryRun"), options.DryRun)...)
return allErrs
}
func ValidateCreateOptions(options *metav1.CreateOptions) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, ValidateFieldManager(options.FieldManager, field.NewPath("fieldManager"))...)
allErrs = append(allErrs, ValidateDryRun(field.NewPath("dryRun"), options.DryRun)...)
allErrs = append(allErrs, ValidateFieldValidation(field.NewPath("fieldValidation"), options.FieldValidation)...)
return allErrs
}
func ValidateUpdateOptions(options *metav1.UpdateOptions) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, ValidateFieldManager(options.FieldManager, field.NewPath("fieldManager"))...)
allErrs = append(allErrs, ValidateDryRun(field.NewPath("dryRun"), options.DryRun)...)
allErrs = append(allErrs, ValidateFieldValidation(field.NewPath("fieldValidation"), options.FieldValidation)...)
return allErrs
}
func ValidatePatchOptions(options *metav1.PatchOptions, patchType types.PatchType) field.ErrorList {
allErrs := field.ErrorList{}
if patchType != types.ApplyPatchType {
if options.Force != nil {
allErrs = append(allErrs, field.Forbidden(field.NewPath("force"), "may not be specified for non-apply patch"))
}
} else {
if options.FieldManager == "" {
// This field is defaulted to "kubectl" by kubectl, but HAS TO be explicitly set by controllers.
allErrs = append(allErrs, field.Required(field.NewPath("fieldManager"), "is required for apply patch"))
}
}
allErrs = append(allErrs, ValidateFieldManager(options.FieldManager, field.NewPath("fieldManager"))...)
allErrs = append(allErrs, ValidateDryRun(field.NewPath("dryRun"), options.DryRun)...)
allErrs = append(allErrs, ValidateFieldValidation(field.NewPath("fieldValidation"), options.FieldValidation)...)
return allErrs
}
var FieldManagerMaxLength = 128
// ValidateFieldManager valides that the fieldManager is the proper length and
// only has printable characters.
func ValidateFieldManager(fieldManager string, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
// the field can not be set as a `*string`, so a empty string ("") is
// considered as not set and is defaulted by the rest of the process
// (unless apply is used, in which case it is required).
if len(fieldManager) > FieldManagerMaxLength {
allErrs = append(allErrs, field.TooLong(fldPath, fieldManager, FieldManagerMaxLength))
}
// Verify that all characters are printable.
for i, r := range fieldManager {
if !unicode.IsPrint(r) {
allErrs = append(allErrs, field.Invalid(fldPath, fieldManager, fmt.Sprintf("invalid character %#U (at position %d)", r, i)))
}
}
return allErrs
}
var allowedDryRunValues = sets.NewString(metav1.DryRunAll)
// ValidateDryRun validates that a dryRun query param only contains allowed values.
func ValidateDryRun(fldPath *field.Path, dryRun []string) field.ErrorList {
allErrs := field.ErrorList{}
if !allowedDryRunValues.HasAll(dryRun...) {
allErrs = append(allErrs, field.NotSupported(fldPath, dryRun, allowedDryRunValues.List()))
}
return allErrs
}
var allowedFieldValidationValues = sets.NewString("", metav1.FieldValidationIgnore, metav1.FieldValidationWarn, metav1.FieldValidationStrict)
// ValidateFieldValidation validates that a fieldValidation query param only contains allowed values.
func ValidateFieldValidation(fldPath *field.Path, fieldValidation string) field.ErrorList {
allErrs := field.ErrorList{}
if !allowedFieldValidationValues.Has(fieldValidation) {
allErrs = append(allErrs, field.NotSupported(fldPath, fieldValidation, allowedFieldValidationValues.List()))
}
return allErrs
}
const UninitializedStatusUpdateErrorMsg string = `must not update status when the object is uninitialized`
// ValidateTableOptions returns any invalid flags on TableOptions.
func ValidateTableOptions(opts *metav1.TableOptions) field.ErrorList {
var allErrs field.ErrorList
switch opts.IncludeObject {
case metav1.IncludeMetadata, metav1.IncludeNone, metav1.IncludeObject, "":
default:
allErrs = append(allErrs, field.Invalid(field.NewPath("includeObject"), opts.IncludeObject, "must be 'Metadata', 'Object', 'None', or empty"))
}
return allErrs
}
const MaxSubresourceNameLength = 256
func ValidateManagedFields(fieldsList []metav1.ManagedFieldsEntry, fldPath *field.Path) field.ErrorList {
var allErrs field.ErrorList
for i, fields := range fieldsList {
fldPath := fldPath.Index(i)
switch fields.Operation {
case metav1.ManagedFieldsOperationApply, metav1.ManagedFieldsOperationUpdate:
default:
allErrs = append(allErrs, field.Invalid(fldPath.Child("operation"), fields.Operation, "must be `Apply` or `Update`"))
}
if len(fields.FieldsType) > 0 && fields.FieldsType != "FieldsV1" {
allErrs = append(allErrs, field.Invalid(fldPath.Child("fieldsType"), fields.FieldsType, "must be `FieldsV1`"))
}
allErrs = append(allErrs, ValidateFieldManager(fields.Manager, fldPath.Child("manager"))...)
if len(fields.Subresource) > MaxSubresourceNameLength {
allErrs = append(allErrs, field.TooLong(fldPath.Child("subresource"), fields.Subresource, MaxSubresourceNameLength))
}
}
return allErrs
}
func ValidateConditions(conditions []metav1.Condition, fldPath *field.Path) field.ErrorList {
var allErrs field.ErrorList
conditionTypeToFirstIndex := map[string]int{}
for i, condition := range conditions {
if _, ok := conditionTypeToFirstIndex[condition.Type]; ok {
allErrs = append(allErrs, field.Duplicate(fldPath.Index(i).Child("type"), condition.Type))
} else {
conditionTypeToFirstIndex[condition.Type] = i
}
allErrs = append(allErrs, ValidateCondition(condition, fldPath.Index(i))...)
}
return allErrs
}
// validConditionStatuses is used internally to check validity and provide a good message
var validConditionStatuses = sets.NewString(string(metav1.ConditionTrue), string(metav1.ConditionFalse), string(metav1.ConditionUnknown))
const (
maxReasonLen = 1 * 1024
maxMessageLen = 32 * 1024
)
func ValidateCondition(condition metav1.Condition, fldPath *field.Path) field.ErrorList {
var allErrs field.ErrorList
// type is set and is a valid format
allErrs = append(allErrs, ValidateLabelName(condition.Type, fldPath.Child("type"))...)
// status is set and is an accepted value
if !validConditionStatuses.Has(string(condition.Status)) {
allErrs = append(allErrs, field.NotSupported(fldPath.Child("status"), condition.Status, validConditionStatuses.List()))
}
if condition.ObservedGeneration < 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("observedGeneration"), condition.ObservedGeneration, "must be greater than or equal to zero"))
}
if condition.LastTransitionTime.IsZero() {
allErrs = append(allErrs, field.Required(fldPath.Child("lastTransitionTime"), "must be set"))
}
if len(condition.Reason) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("reason"), "must be set"))
} else {
for _, currErr := range isValidConditionReason(condition.Reason) {
allErrs = append(allErrs, field.Invalid(fldPath.Child("reason"), condition.Reason, currErr))
}
if len(condition.Reason) > maxReasonLen {
allErrs = append(allErrs, field.TooLong(fldPath.Child("reason"), condition.Reason, maxReasonLen))
}
}
if len(condition.Message) > maxMessageLen {
allErrs = append(allErrs, field.TooLong(fldPath.Child("message"), condition.Message, maxMessageLen))
}
return allErrs
}
const conditionReasonFmt string = "[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?"
const conditionReasonErrMsg string = "a condition reason must start with alphabetic character, optionally followed by a string of alphanumeric characters or '_,:', and must end with an alphanumeric character or '_'"
var conditionReasonRegexp = regexp.MustCompile("^" + conditionReasonFmt + "$")
// isValidConditionReason tests for a string that conforms to rules for condition reasons. This checks the format, but not the length.
func isValidConditionReason(value string) []string {
if !conditionReasonRegexp.MatchString(value) {
return []string{validation.RegexError(conditionReasonErrMsg, conditionReasonFmt, "my_name", "MY_NAME", "MyName", "ReasonA,ReasonB", "ReasonA:ReasonB")}
}
return nil
}