mirror of https://github.com/k3s-io/k3s
66 lines
2.3 KiB
Go
66 lines
2.3 KiB
Go
/*
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Copyright 2018 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 scheduling
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import (
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"fmt"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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// SystemPriorityClasses define system priority classes that are auto-created at cluster bootstrapping.
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// Our API validation logic ensures that any priority class that has a system prefix or its value
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// is higher than HighestUserDefinablePriority is equal to one of these SystemPriorityClasses.
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var systemPriorityClasses = []*PriorityClass{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: SystemNodeCritical,
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},
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Value: SystemCriticalPriority + 1000,
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Description: "Used for system critical pods that must not be moved from their current node.",
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},
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: SystemClusterCritical,
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},
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Value: SystemCriticalPriority,
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Description: "Used for system critical pods that must run in the cluster, but can be moved to another node if necessary.",
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},
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}
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// SystemPriorityClasses returns the list of system priority classes.
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// NOTE: be careful not to modify any of elements of the returned array directly.
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func SystemPriorityClasses() []*PriorityClass {
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return systemPriorityClasses
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}
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// IsKnownSystemPriorityClass checks that "pc" is equal to one of the system PriorityClasses.
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// It ignores "description", labels, annotations, etc. of the PriorityClass.
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func IsKnownSystemPriorityClass(pc *PriorityClass) (bool, error) {
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for _, spc := range systemPriorityClasses {
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if spc.Name == pc.Name {
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if spc.Value != pc.Value {
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return false, fmt.Errorf("value of %v PriorityClass must be %v", spc.Name, spc.Value)
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}
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if spc.GlobalDefault != pc.GlobalDefault {
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return false, fmt.Errorf("globalDefault of %v PriorityClass must be %v", spc.Name, spc.GlobalDefault)
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}
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return true, nil
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}
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}
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return false, fmt.Errorf("%v is not a known system priority class", pc.Name)
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}
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