mirror of
https://github.com/k3s-io/kubernetes.git
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419 lines
21 KiB
Go
419 lines
21 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package validation
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import (
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"fmt"
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"strings"
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"time"
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"github.com/robfig/cron/v3"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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unversionedvalidation "k8s.io/apimachinery/pkg/apis/meta/v1/validation"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/util/sets"
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apimachineryvalidation "k8s.io/apimachinery/pkg/util/validation"
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"k8s.io/apimachinery/pkg/util/validation/field"
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"k8s.io/kubernetes/pkg/apis/batch"
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api "k8s.io/kubernetes/pkg/apis/core"
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apivalidation "k8s.io/kubernetes/pkg/apis/core/validation"
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"k8s.io/utils/pointer"
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)
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// maxParallelismForIndexJob is the maximum parallelism that an Indexed Job
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// is allowed to have. This threshold allows to cap the length of
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// .status.completedIndexes.
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const maxParallelismForIndexedJob = 100000
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// ValidateGeneratedSelector validates that the generated selector on a controller object match the controller object
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// metadata, and the labels on the pod template are as generated.
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//
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// TODO: generalize for other controller objects that will follow the same pattern, such as ReplicaSet and DaemonSet, and
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// move to new location. Replace batch.Job with an interface.
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func ValidateGeneratedSelector(obj *batch.Job) field.ErrorList {
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allErrs := field.ErrorList{}
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if obj.Spec.ManualSelector != nil && *obj.Spec.ManualSelector {
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return allErrs
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}
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if obj.Spec.Selector == nil {
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return allErrs // This case should already have been checked in caller. No need for more errors.
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}
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// If somehow uid was unset then we would get "controller-uid=" as the selector
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// which is bad.
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if obj.ObjectMeta.UID == "" {
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allErrs = append(allErrs, field.Required(field.NewPath("metadata").Child("uid"), ""))
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}
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// If selector generation was requested, then expected labels must be
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// present on pod template, and must match job's uid and name. The
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// generated (not-manual) selectors/labels ensure no overlap with other
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// controllers. The manual mode allows orphaning, adoption,
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// backward-compatibility, and experimentation with new
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// labeling/selection schemes. Automatic selector generation should
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// have placed certain labels on the pod, but this could have failed if
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// the user added coflicting labels. Validate that the expected
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// generated ones are there.
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allErrs = append(allErrs, apivalidation.ValidateHasLabel(obj.Spec.Template.ObjectMeta, field.NewPath("spec").Child("template").Child("metadata"), "controller-uid", string(obj.UID))...)
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allErrs = append(allErrs, apivalidation.ValidateHasLabel(obj.Spec.Template.ObjectMeta, field.NewPath("spec").Child("template").Child("metadata"), "job-name", string(obj.Name))...)
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expectedLabels := make(map[string]string)
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expectedLabels["controller-uid"] = string(obj.UID)
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expectedLabels["job-name"] = string(obj.Name)
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// Whether manually or automatically generated, the selector of the job must match the pods it will produce.
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if selector, err := metav1.LabelSelectorAsSelector(obj.Spec.Selector); err == nil {
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if !selector.Matches(labels.Set(expectedLabels)) {
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allErrs = append(allErrs, field.Invalid(field.NewPath("spec").Child("selector"), obj.Spec.Selector, "`selector` not auto-generated"))
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}
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}
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return allErrs
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}
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// ValidateJob validates a Job and returns an ErrorList with any errors.
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func ValidateJob(job *batch.Job, opts JobValidationOptions) field.ErrorList {
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// Jobs and rcs have the same name validation
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allErrs := apivalidation.ValidateObjectMeta(&job.ObjectMeta, true, apivalidation.ValidateReplicationControllerName, field.NewPath("metadata"))
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allErrs = append(allErrs, ValidateGeneratedSelector(job)...)
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allErrs = append(allErrs, ValidateJobSpec(&job.Spec, field.NewPath("spec"), opts.PodValidationOptions)...)
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if !opts.AllowTrackingAnnotation && hasJobTrackingAnnotation(job) {
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allErrs = append(allErrs, field.Forbidden(field.NewPath("metadata").Child("annotations").Key(batch.JobTrackingFinalizer), "cannot add this annotation"))
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}
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if job.Spec.CompletionMode != nil && *job.Spec.CompletionMode == batch.IndexedCompletion && job.Spec.Completions != nil && *job.Spec.Completions > 0 {
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// For indexed job, the job controller appends a suffix (`-$INDEX`)
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// to the pod hostname when indexed job create pods.
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// The index could be maximum `.spec.completions-1`
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// If we don't validate this here, the indexed job will fail to create pods later.
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maximumPodHostname := fmt.Sprintf("%s-%d", job.ObjectMeta.Name, *job.Spec.Completions-1)
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if errs := apimachineryvalidation.IsDNS1123Label(maximumPodHostname); len(errs) > 0 {
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allErrs = append(allErrs, field.Invalid(field.NewPath("metadata").Child("name"), job.ObjectMeta.Name, fmt.Sprintf("will not able to create pod with invalid DNS label: %s", maximumPodHostname)))
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}
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}
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return allErrs
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}
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func hasJobTrackingAnnotation(job *batch.Job) bool {
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if job.Annotations == nil {
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return false
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}
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_, ok := job.Annotations[batch.JobTrackingFinalizer]
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return ok
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}
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// ValidateJobSpec validates a JobSpec and returns an ErrorList with any errors.
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func ValidateJobSpec(spec *batch.JobSpec, fldPath *field.Path, opts apivalidation.PodValidationOptions) field.ErrorList {
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allErrs := validateJobSpec(spec, fldPath, opts)
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if spec.Selector == nil {
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allErrs = append(allErrs, field.Required(fldPath.Child("selector"), ""))
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} else {
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allErrs = append(allErrs, unversionedvalidation.ValidateLabelSelector(spec.Selector, fldPath.Child("selector"))...)
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}
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// Whether manually or automatically generated, the selector of the job must match the pods it will produce.
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if selector, err := metav1.LabelSelectorAsSelector(spec.Selector); err == nil {
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labels := labels.Set(spec.Template.Labels)
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if !selector.Matches(labels) {
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allErrs = append(allErrs, field.Invalid(fldPath.Child("template", "metadata", "labels"), spec.Template.Labels, "`selector` does not match template `labels`"))
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}
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}
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return allErrs
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}
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func validateJobSpec(spec *batch.JobSpec, fldPath *field.Path, opts apivalidation.PodValidationOptions) field.ErrorList {
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allErrs := field.ErrorList{}
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if spec.Parallelism != nil {
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.Parallelism), fldPath.Child("parallelism"))...)
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}
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if spec.Completions != nil {
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.Completions), fldPath.Child("completions"))...)
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}
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if spec.ActiveDeadlineSeconds != nil {
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.ActiveDeadlineSeconds), fldPath.Child("activeDeadlineSeconds"))...)
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}
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if spec.BackoffLimit != nil {
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.BackoffLimit), fldPath.Child("backoffLimit"))...)
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}
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if spec.TTLSecondsAfterFinished != nil {
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.TTLSecondsAfterFinished), fldPath.Child("ttlSecondsAfterFinished"))...)
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}
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// CompletionMode might be nil when IndexedJob feature gate is disabled.
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if spec.CompletionMode != nil {
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if *spec.CompletionMode != batch.NonIndexedCompletion && *spec.CompletionMode != batch.IndexedCompletion {
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allErrs = append(allErrs, field.NotSupported(fldPath.Child("completionMode"), spec.CompletionMode, []string{string(batch.NonIndexedCompletion), string(batch.IndexedCompletion)}))
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}
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if *spec.CompletionMode == batch.IndexedCompletion {
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if spec.Completions == nil {
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allErrs = append(allErrs, field.Required(fldPath.Child("completions"), fmt.Sprintf("when completion mode is %s", batch.IndexedCompletion)))
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}
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if spec.Parallelism != nil && *spec.Parallelism > maxParallelismForIndexedJob {
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allErrs = append(allErrs, field.Invalid(fldPath.Child("parallelism"), *spec.Parallelism, fmt.Sprintf("must be less than or equal to %d when completion mode is %s", maxParallelismForIndexedJob, batch.IndexedCompletion)))
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}
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}
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}
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allErrs = append(allErrs, apivalidation.ValidatePodTemplateSpec(&spec.Template, fldPath.Child("template"), opts)...)
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// spec.Template.Spec.RestartPolicy can be defaulted as RestartPolicyAlways
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// by SetDefaults_PodSpec function when the user does not explicitly specify a value for it,
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// so we check both empty and RestartPolicyAlways cases here
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if spec.Template.Spec.RestartPolicy == api.RestartPolicyAlways || spec.Template.Spec.RestartPolicy == "" {
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allErrs = append(allErrs, field.Required(fldPath.Child("template", "spec", "restartPolicy"),
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fmt.Sprintf("valid values: %q, %q", api.RestartPolicyOnFailure, api.RestartPolicyNever)))
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} else if spec.Template.Spec.RestartPolicy != api.RestartPolicyOnFailure && spec.Template.Spec.RestartPolicy != api.RestartPolicyNever {
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allErrs = append(allErrs, field.NotSupported(fldPath.Child("template", "spec", "restartPolicy"),
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spec.Template.Spec.RestartPolicy, []string{string(api.RestartPolicyOnFailure), string(api.RestartPolicyNever)}))
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}
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return allErrs
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}
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// validateJobStatus validates a JobStatus and returns an ErrorList with any errors.
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func validateJobStatus(status *batch.JobStatus, fldPath *field.Path) field.ErrorList {
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allErrs := field.ErrorList{}
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.Active), fldPath.Child("active"))...)
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.Succeeded), fldPath.Child("succeeded"))...)
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.Failed), fldPath.Child("failed"))...)
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if status.Ready != nil {
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*status.Ready), fldPath.Child("ready"))...)
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}
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if status.UncountedTerminatedPods != nil {
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path := fldPath.Child("uncountedTerminatedPods")
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seen := sets.NewString()
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for i, k := range status.UncountedTerminatedPods.Succeeded {
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p := path.Child("succeeded").Index(i)
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if k == "" {
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allErrs = append(allErrs, field.Invalid(p, k, "must not be empty"))
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} else if seen.Has(string(k)) {
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allErrs = append(allErrs, field.Duplicate(p, k))
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} else {
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seen.Insert(string(k))
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}
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}
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for i, k := range status.UncountedTerminatedPods.Failed {
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p := path.Child("failed").Index(i)
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if k == "" {
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allErrs = append(allErrs, field.Invalid(p, k, "must not be empty"))
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} else if seen.Has(string(k)) {
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allErrs = append(allErrs, field.Duplicate(p, k))
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} else {
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seen.Insert(string(k))
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}
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}
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}
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return allErrs
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}
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// ValidateJobUpdate validates an update to a Job and returns an ErrorList with any errors.
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func ValidateJobUpdate(job, oldJob *batch.Job, opts JobValidationOptions) field.ErrorList {
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allErrs := apivalidation.ValidateObjectMetaUpdate(&job.ObjectMeta, &oldJob.ObjectMeta, field.NewPath("metadata"))
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allErrs = append(allErrs, ValidateJobSpecUpdate(job.Spec, oldJob.Spec, field.NewPath("spec"), opts)...)
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return allErrs
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}
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// ValidateJobUpdateStatus validates an update to the status of a Job and returns an ErrorList with any errors.
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func ValidateJobUpdateStatus(job, oldJob *batch.Job) field.ErrorList {
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allErrs := apivalidation.ValidateObjectMetaUpdate(&job.ObjectMeta, &oldJob.ObjectMeta, field.NewPath("metadata"))
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allErrs = append(allErrs, ValidateJobStatusUpdate(job.Status, oldJob.Status)...)
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return allErrs
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}
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// ValidateJobSpecUpdate validates an update to a JobSpec and returns an ErrorList with any errors.
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func ValidateJobSpecUpdate(spec, oldSpec batch.JobSpec, fldPath *field.Path, opts JobValidationOptions) field.ErrorList {
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allErrs := field.ErrorList{}
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allErrs = append(allErrs, ValidateJobSpec(&spec, fldPath, opts.PodValidationOptions)...)
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allErrs = append(allErrs, apivalidation.ValidateImmutableField(spec.Completions, oldSpec.Completions, fldPath.Child("completions"))...)
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allErrs = append(allErrs, apivalidation.ValidateImmutableField(spec.Selector, oldSpec.Selector, fldPath.Child("selector"))...)
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allErrs = append(allErrs, validatePodTemplateUpdate(spec, oldSpec, fldPath, opts)...)
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allErrs = append(allErrs, apivalidation.ValidateImmutableField(spec.CompletionMode, oldSpec.CompletionMode, fldPath.Child("completionMode"))...)
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return allErrs
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}
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func validatePodTemplateUpdate(spec, oldSpec batch.JobSpec, fldPath *field.Path, opts JobValidationOptions) field.ErrorList {
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allErrs := field.ErrorList{}
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template := &spec.Template
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oldTemplate := &oldSpec.Template
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if opts.AllowMutableSchedulingDirectives {
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oldTemplate = oldSpec.Template.DeepCopy() // +k8s:verify-mutation:reason=clone
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switch {
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case template.Spec.Affinity == nil && oldTemplate.Spec.Affinity != nil:
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// allow the Affinity field to be cleared if the old template had no affinity directives other than NodeAffinity
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oldTemplate.Spec.Affinity.NodeAffinity = nil // +k8s:verify-mutation:reason=clone
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if (*oldTemplate.Spec.Affinity) == (api.Affinity{}) {
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oldTemplate.Spec.Affinity = nil // +k8s:verify-mutation:reason=clone
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}
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case template.Spec.Affinity != nil && oldTemplate.Spec.Affinity == nil:
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// allow the NodeAffinity field to skip immutability checking
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oldTemplate.Spec.Affinity = &api.Affinity{NodeAffinity: template.Spec.Affinity.NodeAffinity} // +k8s:verify-mutation:reason=clone
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case template.Spec.Affinity != nil && oldTemplate.Spec.Affinity != nil:
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// allow the NodeAffinity field to skip immutability checking
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oldTemplate.Spec.Affinity.NodeAffinity = template.Spec.Affinity.NodeAffinity // +k8s:verify-mutation:reason=clone
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}
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oldTemplate.Spec.NodeSelector = template.Spec.NodeSelector // +k8s:verify-mutation:reason=clone
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oldTemplate.Spec.Tolerations = template.Spec.Tolerations // +k8s:verify-mutation:reason=clone
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oldTemplate.Annotations = template.Annotations // +k8s:verify-mutation:reason=clone
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oldTemplate.Labels = template.Labels // +k8s:verify-mutation:reason=clone
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}
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allErrs = append(allErrs, apivalidation.ValidateImmutableField(template, oldTemplate, fldPath.Child("template"))...)
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return allErrs
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}
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// ValidateJobStatusUpdate validates an update to a JobStatus and returns an ErrorList with any errors.
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func ValidateJobStatusUpdate(status, oldStatus batch.JobStatus) field.ErrorList {
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allErrs := field.ErrorList{}
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allErrs = append(allErrs, validateJobStatus(&status, field.NewPath("status"))...)
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return allErrs
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}
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// ValidateCronJobCreate validates a CronJob on creation and returns an ErrorList with any errors.
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func ValidateCronJobCreate(cronJob *batch.CronJob, opts apivalidation.PodValidationOptions) field.ErrorList {
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// CronJobs and rcs have the same name validation
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allErrs := apivalidation.ValidateObjectMeta(&cronJob.ObjectMeta, true, apivalidation.ValidateReplicationControllerName, field.NewPath("metadata"))
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allErrs = append(allErrs, validateCronJobSpec(&cronJob.Spec, nil, field.NewPath("spec"), opts)...)
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if len(cronJob.ObjectMeta.Name) > apimachineryvalidation.DNS1035LabelMaxLength-11 {
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// The cronjob controller appends a 11-character suffix to the cronjob (`-$TIMESTAMP`) when
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// creating a job. The job name length limit is 63 characters.
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// Therefore cronjob names must have length <= 63-11=52. If we don't validate this here,
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// then job creation will fail later.
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allErrs = append(allErrs, field.Invalid(field.NewPath("metadata").Child("name"), cronJob.ObjectMeta.Name, "must be no more than 52 characters"))
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}
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return allErrs
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}
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// ValidateCronJobUpdate validates an update to a CronJob and returns an ErrorList with any errors.
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func ValidateCronJobUpdate(job, oldJob *batch.CronJob, opts apivalidation.PodValidationOptions) field.ErrorList {
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allErrs := apivalidation.ValidateObjectMetaUpdate(&job.ObjectMeta, &oldJob.ObjectMeta, field.NewPath("metadata"))
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allErrs = append(allErrs, validateCronJobSpec(&job.Spec, &oldJob.Spec, field.NewPath("spec"), opts)...)
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// skip the 52-character name validation limit on update validation
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// to allow old cronjobs with names > 52 chars to be updated/deleted
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return allErrs
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}
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// validateCronJobSpec validates a CronJobSpec and returns an ErrorList with any errors.
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func validateCronJobSpec(spec, oldSpec *batch.CronJobSpec, fldPath *field.Path, opts apivalidation.PodValidationOptions) field.ErrorList {
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allErrs := field.ErrorList{}
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if len(spec.Schedule) == 0 {
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allErrs = append(allErrs, field.Required(fldPath.Child("schedule"), ""))
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} else {
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allErrs = append(allErrs, validateScheduleFormat(spec.Schedule, spec.TimeZone, fldPath.Child("schedule"))...)
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}
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if spec.StartingDeadlineSeconds != nil {
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.StartingDeadlineSeconds), fldPath.Child("startingDeadlineSeconds"))...)
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}
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if oldSpec == nil || !pointer.StringEqual(oldSpec.TimeZone, spec.TimeZone) {
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allErrs = append(allErrs, validateTimeZone(spec.TimeZone, fldPath.Child("timeZone"))...)
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}
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allErrs = append(allErrs, validateConcurrencyPolicy(&spec.ConcurrencyPolicy, fldPath.Child("concurrencyPolicy"))...)
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allErrs = append(allErrs, ValidateJobTemplateSpec(&spec.JobTemplate, fldPath.Child("jobTemplate"), opts)...)
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if spec.SuccessfulJobsHistoryLimit != nil {
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// zero is a valid SuccessfulJobsHistoryLimit
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.SuccessfulJobsHistoryLimit), fldPath.Child("successfulJobsHistoryLimit"))...)
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}
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if spec.FailedJobsHistoryLimit != nil {
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// zero is a valid SuccessfulJobsHistoryLimit
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.FailedJobsHistoryLimit), fldPath.Child("failedJobsHistoryLimit"))...)
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}
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return allErrs
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}
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func validateConcurrencyPolicy(concurrencyPolicy *batch.ConcurrencyPolicy, fldPath *field.Path) field.ErrorList {
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allErrs := field.ErrorList{}
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switch *concurrencyPolicy {
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case batch.AllowConcurrent, batch.ForbidConcurrent, batch.ReplaceConcurrent:
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break
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case "":
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allErrs = append(allErrs, field.Required(fldPath, ""))
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default:
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validValues := []string{string(batch.AllowConcurrent), string(batch.ForbidConcurrent), string(batch.ReplaceConcurrent)}
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allErrs = append(allErrs, field.NotSupported(fldPath, *concurrencyPolicy, validValues))
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}
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return allErrs
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}
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func validateScheduleFormat(schedule string, timeZone *string, fldPath *field.Path) field.ErrorList {
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allErrs := field.ErrorList{}
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if _, err := cron.ParseStandard(schedule); err != nil {
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allErrs = append(allErrs, field.Invalid(fldPath, schedule, err.Error()))
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}
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if strings.Contains(schedule, "TZ") && timeZone != nil {
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allErrs = append(allErrs, field.Invalid(fldPath, schedule, "cannot use both timeZone field and TZ or CRON_TZ in schedule"))
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}
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return allErrs
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}
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func validateTimeZone(timeZone *string, fldPath *field.Path) field.ErrorList {
|
|
allErrs := field.ErrorList{}
|
|
if timeZone == nil {
|
|
return allErrs
|
|
}
|
|
|
|
if len(*timeZone) == 0 {
|
|
allErrs = append(allErrs, field.Invalid(fldPath, timeZone, "timeZone must be nil or non-empty string"))
|
|
return allErrs
|
|
}
|
|
|
|
if strings.EqualFold(*timeZone, "Local") {
|
|
allErrs = append(allErrs, field.Invalid(fldPath, timeZone, "timeZone must be an explicit time zone as defined in https://www.iana.org/time-zones"))
|
|
}
|
|
|
|
if _, err := time.LoadLocation(*timeZone); err != nil {
|
|
allErrs = append(allErrs, field.Invalid(fldPath, timeZone, err.Error()))
|
|
}
|
|
|
|
return allErrs
|
|
}
|
|
|
|
// ValidateJobTemplate validates a JobTemplate and returns an ErrorList with any errors.
|
|
func ValidateJobTemplate(job *batch.JobTemplate, opts apivalidation.PodValidationOptions) 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"), opts)...)
|
|
return allErrs
|
|
}
|
|
|
|
// ValidateJobTemplateSpec validates a JobTemplateSpec and returns an ErrorList with any errors.
|
|
func ValidateJobTemplateSpec(spec *batch.JobTemplateSpec, fldPath *field.Path, opts apivalidation.PodValidationOptions) field.ErrorList {
|
|
allErrs := validateJobSpec(&spec.Spec, fldPath.Child("spec"), opts)
|
|
|
|
// 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
|
|
}
|
|
|
|
type JobValidationOptions struct {
|
|
apivalidation.PodValidationOptions
|
|
// Allow Job to have the annotation batch.kubernetes.io/job-tracking
|
|
AllowTrackingAnnotation bool
|
|
// Allow mutable node affinity, selector and tolerations of the template
|
|
AllowMutableSchedulingDirectives bool
|
|
}
|