227 lines
10 KiB
Go
227 lines
10 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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"github.com/robfig/cron"
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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/validation/field"
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"k8s.io/kubernetes/pkg/api"
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apivalidation "k8s.io/kubernetes/pkg/api/validation"
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"k8s.io/kubernetes/pkg/apis/batch"
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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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//
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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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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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func ValidateJob(job *batch.Job) 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"))...)
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return allErrs
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}
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func ValidateJobSpec(spec *batch.JobSpec, fldPath *field.Path) field.ErrorList {
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allErrs := validateJobSpec(spec, fldPath)
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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) 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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allErrs = append(allErrs, apivalidation.ValidatePodTemplateSpec(&spec.Template, fldPath.Child("template"))...)
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if spec.Template.Spec.RestartPolicy != api.RestartPolicyOnFailure &&
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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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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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return allErrs
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}
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func ValidateJobUpdate(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, ValidateJobSpecUpdate(job.Spec, oldJob.Spec, field.NewPath("spec"))...)
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return allErrs
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}
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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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func ValidateJobSpecUpdate(spec, oldSpec batch.JobSpec, fldPath *field.Path) field.ErrorList {
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allErrs := field.ErrorList{}
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allErrs = append(allErrs, ValidateJobSpec(&spec, fldPath)...)
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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, apivalidation.ValidateImmutableField(spec.Template, oldSpec.Template, fldPath.Child("template"))...)
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return allErrs
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}
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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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func ValidateCronJob(scheduledJob *batch.CronJob) field.ErrorList {
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// CronJobs and rcs have the same name validation
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allErrs := apivalidation.ValidateObjectMeta(&scheduledJob.ObjectMeta, true, apivalidation.ValidateReplicationControllerName, field.NewPath("metadata"))
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allErrs = append(allErrs, ValidateCronJobSpec(&scheduledJob.Spec, field.NewPath("spec"))...)
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return allErrs
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}
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func ValidateCronJobSpec(spec *batch.CronJobSpec, fldPath *field.Path) 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, 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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allErrs = append(allErrs, validateConcurrencyPolicy(&spec.ConcurrencyPolicy, fldPath.Child("concurrencyPolicy"))...)
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allErrs = append(allErrs, ValidateJobTemplateSpec(&spec.JobTemplate, fldPath.Child("jobTemplate"))...)
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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, 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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return allErrs
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}
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func ValidateJobTemplate(job *batch.JobTemplate) field.ErrorList {
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// this method should be identical to ValidateJob
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allErrs := apivalidation.ValidateObjectMeta(&job.ObjectMeta, true, apivalidation.ValidateReplicationControllerName, field.NewPath("metadata"))
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allErrs = append(allErrs, ValidateJobTemplateSpec(&job.Template, field.NewPath("template"))...)
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return allErrs
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}
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func ValidateJobTemplateSpec(spec *batch.JobTemplateSpec, fldPath *field.Path) field.ErrorList {
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allErrs := validateJobSpec(&spec.Spec, fldPath.Child("spec"))
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// jobtemplate will always have the selector automatically generated
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if spec.Spec.Selector != nil {
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allErrs = append(allErrs, field.Invalid(fldPath.Child("spec", "selector"), spec.Spec.Selector, "`selector` will be auto-generated"))
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}
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if spec.Spec.ManualSelector != nil && *spec.Spec.ManualSelector {
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allErrs = append(allErrs, field.NotSupported(fldPath.Child("spec", "manualSelector"), spec.Spec.ManualSelector, []string{"nil", "false"}))
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}
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return allErrs
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}
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