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Merge pull request #52733 from julia-stripe/validate-cronjob-name-length

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Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>..

Validate that cronjob names are 52 characters or less

**What this PR does / why we need it**:

Right now when you create a cronjob with a name longer than 52 characters, creation will succeed but the cronjob controller will create Job objects with names longer than 63 characters. Jobs cannot have names longer than 63 characters, so the cronjob will never be able to run any jobs.

**Which issue this PR fixes** : Fixes #50850 

**Special notes for your reviewer**:

**Release note**:
```release-note
Validate that cronjob names are 52 characters or less
```
This commit is contained in:
Kubernetes Submit Queue 2017-09-22 19:22:20 -07:00 committed by GitHub
commit d85f4c26e0
3 changed files with 25 additions and 0 deletions
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1
pkg/apis/batch/validation/BUILD
View File

@ -17,6 +17,7 @@ go_library(
"//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/apis/meta/v1/validation:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/util/validation:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/util/validation/field:go_default_library",
],
)

8
pkg/apis/batch/validation/validation.go
View File

@ -22,6 +22,7 @@ import (
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/api"
apivalidation "k8s.io/kubernetes/pkg/api/validation"
@ -165,6 +166,13 @@ 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
}

16
pkg/apis/batch/validation/validation_test.go
View File

@ -520,6 +520,22 @@ func TestValidateCronJob(t *testing.T) {
},
},
},
"metadata.name: must be no more than 52 characters": {
ObjectMeta: metav1.ObjectMeta{
Name: "10000000002000000000300000000040000000005000000000123",
Namespace: metav1.NamespaceDefault,
UID: types.UID("1a2b3c"),
},
Spec: batch.CronJobSpec{
Schedule: "* * * * ?",
ConcurrencyPolicy: batch.AllowConcurrent,
JobTemplate: batch.JobTemplateSpec{
Spec: batch.JobSpec{
Template: validPodTemplateSpec,
},
},
},
},
"spec.jobTemplate.spec.manualSelector: Unsupported value": {
ObjectMeta: metav1.ObjectMeta{
Name: "mycronjob",