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/*
Copyright 2017 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"
"strings"
apimachineryvalidation "k8s.io/apimachinery/pkg/api/validation"
"k8s.io/apimachinery/pkg/util/validation/field"
apivalidation "k8s.io/kubernetes/pkg/apis/core/validation"
"k8s.io/kubernetes/pkg/apis/scheduling"
)
// ValidatePriorityClass tests whether required fields in the PriorityClass are
// set correctly.
func ValidatePriorityClass(pc *scheduling.PriorityClass) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, apivalidation.ValidateObjectMeta(&pc.ObjectMeta, false, apimachineryvalidation.NameIsDNSSubdomain, field.NewPath("metadata"))...)
// If the priorityClass starts with a system prefix, it must be one of the
// predefined system priority classes.
if strings.HasPrefix(pc.Name, scheduling.SystemPriorityClassPrefix) {
if is, err := scheduling.IsKnownSystemPriorityClass(pc); !is {
allErrs = append(allErrs, field.Forbidden(field.NewPath("metadata", "name"), "priority class names with '"+scheduling.SystemPriorityClassPrefix+"' prefix are reserved for system use only. error: "+err.Error()))
}
} else if pc.Value > scheduling.HighestUserDefinablePriority {
// Non-system critical priority classes are not allowed to have a value larger than HighestUserDefinablePriority.
allErrs = append(allErrs, field.Forbidden(field.NewPath("value"), fmt.Sprintf("maximum allowed value of a user defined priority is %v", scheduling.HighestUserDefinablePriority)))
}
return allErrs
}
// ValidatePriorityClassUpdate tests if required fields in the PriorityClass are
// set and are valid. PriorityClass does not allow updating Name, and Value.
func ValidatePriorityClassUpdate(pc, oldPc *scheduling.PriorityClass) field.ErrorList {
allErrs := apivalidation.ValidateObjectMetaUpdate(&pc.ObjectMeta, &oldPc.ObjectMeta, field.NewPath("metadata"))
// Name is immutable and is checked by the ObjectMeta validator.
if pc.Value != oldPc.Value {
allErrs = append(allErrs, field.Forbidden(field.NewPath("Value"), "may not be changed in an update."))
}
return allErrs
}
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