/
validation.go
258 lines (221 loc) · 12.2 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
/*
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 validation
import (
"github.com/robfig/cron"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
unversionedvalidation "k8s.io/apimachinery/pkg/apis/meta/v1/validation"
"k8s.io/apimachinery/pkg/labels"
apimachineryvalidation "k8s.io/apimachinery/pkg/util/validation"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/kubernetes/pkg/apis/batch"
api "k8s.io/kubernetes/pkg/apis/core"
apivalidation "k8s.io/kubernetes/pkg/apis/core/validation"
)
// TODO: generalize for other controller objects that will follow the same pattern, such as ReplicaSet and DaemonSet, and
// move to new location. Replace batch.Job with an interface.
//
// ValidateGeneratedSelector validates that the generated selector on a controller object match the controller object
// metadata, and the labels on the pod template are as generated.
func ValidateGeneratedSelector(obj *batch.Job) field.ErrorList {
allErrs := field.ErrorList{}
if obj.Spec.ManualSelector != nil && *obj.Spec.ManualSelector {
return allErrs
}
if obj.Spec.Selector == nil {
return allErrs // This case should already have been checked in caller. No need for more errors.
}
// If somehow uid was unset then we would get "controller-uid=" as the selector
// which is bad.
if obj.ObjectMeta.UID == "" {
allErrs = append(allErrs, field.Required(field.NewPath("metadata").Child("uid"), ""))
}
// If selector generation was requested, then expected labels must be
// present on pod template, and must match job's uid and name. The
// generated (not-manual) selectors/labels ensure no overlap with other
// controllers. The manual mode allows orphaning, adoption,
// backward-compatibility, and experimentation with new
// labeling/selection schemes. Automatic selector generation should
// have placed certain labels on the pod, but this could have failed if
// the user added coflicting labels. Validate that the expected
// generated ones are there.
allErrs = append(allErrs, apivalidation.ValidateHasLabel(obj.Spec.Template.ObjectMeta, field.NewPath("spec").Child("template").Child("metadata"), "controller-uid", string(obj.UID))...)
allErrs = append(allErrs, apivalidation.ValidateHasLabel(obj.Spec.Template.ObjectMeta, field.NewPath("spec").Child("template").Child("metadata"), "job-name", string(obj.Name))...)
expectedLabels := make(map[string]string)
expectedLabels["controller-uid"] = string(obj.UID)
expectedLabels["job-name"] = string(obj.Name)
// Whether manually or automatically generated, the selector of the job must match the pods it will produce.
if selector, err := metav1.LabelSelectorAsSelector(obj.Spec.Selector); err == nil {
if !selector.Matches(labels.Set(expectedLabels)) {
allErrs = append(allErrs, field.Invalid(field.NewPath("spec").Child("selector"), obj.Spec.Selector, "`selector` not auto-generated"))
}
}
return allErrs
}
func ValidateJob(job *batch.Job) field.ErrorList {
// Jobs and rcs have the same name validation
allErrs := apivalidation.ValidateObjectMeta(&job.ObjectMeta, true, apivalidation.ValidateReplicationControllerName, field.NewPath("metadata"))
allErrs = append(allErrs, ValidateGeneratedSelector(job)...)
allErrs = append(allErrs, ValidateJobSpec(&job.Spec, field.NewPath("spec"))...)
return allErrs
}
func ValidateJobSpec(spec *batch.JobSpec, fldPath *field.Path) field.ErrorList {
allErrs := validateJobSpec(spec, fldPath)
if spec.Selector == nil {
allErrs = append(allErrs, field.Required(fldPath.Child("selector"), ""))
} else {
allErrs = append(allErrs, unversionedvalidation.ValidateLabelSelector(spec.Selector, fldPath.Child("selector"))...)
}
// Whether manually or automatically generated, the selector of the job must match the pods it will produce.
if selector, err := metav1.LabelSelectorAsSelector(spec.Selector); err == nil {
labels := labels.Set(spec.Template.Labels)
if !selector.Matches(labels) {
allErrs = append(allErrs, field.Invalid(fldPath.Child("template", "metadata", "labels"), spec.Template.Labels, "`selector` does not match template `labels`"))
}
}
return allErrs
}
func validateJobSpec(spec *batch.JobSpec, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if spec.Parallelism != nil {
allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.Parallelism), fldPath.Child("parallelism"))...)
}
if spec.Completions != nil {
allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.Completions), fldPath.Child("completions"))...)
}
if spec.ActiveDeadlineSeconds != nil {
allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.ActiveDeadlineSeconds), fldPath.Child("activeDeadlineSeconds"))...)
}
if spec.BackoffLimit != nil {
allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.BackoffLimit), fldPath.Child("backoffLimit"))...)
}
if spec.TTLSecondsAfterFinished != nil {
allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.TTLSecondsAfterFinished), fldPath.Child("ttlSecondsAfterFinished"))...)
}
allErrs = append(allErrs, apivalidation.ValidatePodTemplateSpec(&spec.Template, fldPath.Child("template"))...)
if spec.Template.Spec.RestartPolicy != api.RestartPolicyOnFailure &&
spec.Template.Spec.RestartPolicy != api.RestartPolicyNever {
allErrs = append(allErrs, field.NotSupported(fldPath.Child("template", "spec", "restartPolicy"),
spec.Template.Spec.RestartPolicy, []string{string(api.RestartPolicyOnFailure), string(api.RestartPolicyNever)}))
}
return allErrs
}
func ValidateJobStatus(status *batch.JobStatus, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.Active), fldPath.Child("active"))...)
allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.Succeeded), fldPath.Child("succeeded"))...)
allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.Failed), fldPath.Child("failed"))...)
return allErrs
}
func ValidateJobUpdate(job, oldJob *batch.Job) field.ErrorList {
allErrs := apivalidation.ValidateObjectMetaUpdate(&job.ObjectMeta, &oldJob.ObjectMeta, field.NewPath("metadata"))
allErrs = append(allErrs, ValidateJobSpecUpdate(job.Spec, oldJob.Spec, field.NewPath("spec"))...)
return allErrs
}
func ValidateJobUpdateStatus(job, oldJob *batch.Job) field.ErrorList {
allErrs := apivalidation.ValidateObjectMetaUpdate(&job.ObjectMeta, &oldJob.ObjectMeta, field.NewPath("metadata"))
allErrs = append(allErrs, ValidateJobStatusUpdate(job.Status, oldJob.Status)...)
return allErrs
}
func ValidateJobSpecUpdate(spec, oldSpec batch.JobSpec, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, ValidateJobSpec(&spec, fldPath)...)
allErrs = append(allErrs, apivalidation.ValidateImmutableField(spec.Completions, oldSpec.Completions, fldPath.Child("completions"))...)
allErrs = append(allErrs, apivalidation.ValidateImmutableField(spec.Selector, oldSpec.Selector, fldPath.Child("selector"))...)
allErrs = append(allErrs, apivalidation.ValidateImmutableField(spec.Template, oldSpec.Template, fldPath.Child("template"))...)
return allErrs
}
func ValidateJobStatusUpdate(status, oldStatus batch.JobStatus) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, ValidateJobStatus(&status, field.NewPath("status"))...)
return allErrs
}
func ValidateCronJob(scheduledJob *batch.CronJob) field.ErrorList {
// CronJobs and rcs have the same name validation
allErrs := apivalidation.ValidateObjectMeta(&scheduledJob.ObjectMeta, true, apivalidation.ValidateReplicationControllerName, field.NewPath("metadata"))
allErrs = append(allErrs, ValidateCronJobSpec(&scheduledJob.Spec, field.NewPath("spec"))...)
if len(scheduledJob.ObjectMeta.Name) > apimachineryvalidation.DNS1035LabelMaxLength-11 {
// The cronjob controller appends a 11-character suffix to the cronjob (`-$TIMESTAMP`) when
// creating a job. The job name length limit is 63 characters.
// Therefore cronjob names must have length <= 63-11=52. If we don't validate this here,
// then job creation will fail later.
allErrs = append(allErrs, field.Invalid(field.NewPath("metadata").Child("name"), scheduledJob.ObjectMeta.Name, "must be no more than 52 characters"))
}
return allErrs
}
func ValidateCronJobUpdate(job, oldJob *batch.CronJob) field.ErrorList {
allErrs := apivalidation.ValidateObjectMetaUpdate(&job.ObjectMeta, &oldJob.ObjectMeta, field.NewPath("metadata"))
allErrs = append(allErrs, ValidateCronJobSpec(&job.Spec, field.NewPath("spec"))...)
// skip the 52-character name validation limit on update validation
// to allow old cronjobs with names > 52 chars to be updated/deleted
return allErrs
}
func ValidateCronJobSpec(spec *batch.CronJobSpec, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if len(spec.Schedule) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("schedule"), ""))
} else {
allErrs = append(allErrs, validateScheduleFormat(spec.Schedule, fldPath.Child("schedule"))...)
}
if spec.StartingDeadlineSeconds != nil {
allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.StartingDeadlineSeconds), fldPath.Child("startingDeadlineSeconds"))...)
}
allErrs = append(allErrs, validateConcurrencyPolicy(&spec.ConcurrencyPolicy, fldPath.Child("concurrencyPolicy"))...)
allErrs = append(allErrs, ValidateJobTemplateSpec(&spec.JobTemplate, fldPath.Child("jobTemplate"))...)
if spec.SuccessfulJobsHistoryLimit != nil {
// zero is a valid SuccessfulJobsHistoryLimit
allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.SuccessfulJobsHistoryLimit), fldPath.Child("successfulJobsHistoryLimit"))...)
}
if spec.FailedJobsHistoryLimit != nil {
// zero is a valid SuccessfulJobsHistoryLimit
allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.FailedJobsHistoryLimit), fldPath.Child("failedJobsHistoryLimit"))...)
}
return allErrs
}
func validateConcurrencyPolicy(concurrencyPolicy *batch.ConcurrencyPolicy, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
switch *concurrencyPolicy {
case batch.AllowConcurrent, batch.ForbidConcurrent, batch.ReplaceConcurrent:
break
case "":
allErrs = append(allErrs, field.Required(fldPath, ""))
default:
validValues := []string{string(batch.AllowConcurrent), string(batch.ForbidConcurrent), string(batch.ReplaceConcurrent)}
allErrs = append(allErrs, field.NotSupported(fldPath, *concurrencyPolicy, validValues))
}
return allErrs
}
func validateScheduleFormat(schedule string, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if _, err := cron.ParseStandard(schedule); err != nil {
allErrs = append(allErrs, field.Invalid(fldPath, schedule, err.Error()))
}
return allErrs
}
func ValidateJobTemplate(job *batch.JobTemplate) field.ErrorList {
// this method should be identical to ValidateJob
allErrs := apivalidation.ValidateObjectMeta(&job.ObjectMeta, true, apivalidation.ValidateReplicationControllerName, field.NewPath("metadata"))
allErrs = append(allErrs, ValidateJobTemplateSpec(&job.Template, field.NewPath("template"))...)
return allErrs
}
func ValidateJobTemplateSpec(spec *batch.JobTemplateSpec, fldPath *field.Path) field.ErrorList {
allErrs := validateJobSpec(&spec.Spec, fldPath.Child("spec"))
// jobtemplate will always have the selector automatically generated
if spec.Spec.Selector != nil {
allErrs = append(allErrs, field.Invalid(fldPath.Child("spec", "selector"), spec.Spec.Selector, "`selector` will be auto-generated"))
}
if spec.Spec.ManualSelector != nil && *spec.Spec.ManualSelector {
allErrs = append(allErrs, field.NotSupported(fldPath.Child("spec", "manualSelector"), spec.Spec.ManualSelector, []string{"nil", "false"}))
}
return allErrs
}