mirror of https://github.com/k3s-io/k3s
65 lines
2.0 KiB
Go
65 lines
2.0 KiB
Go
// +build windows
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/*
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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 app
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import (
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"fmt"
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"golang.org/x/sys/windows"
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"k8s.io/klog/v2"
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"k8s.io/kubernetes/pkg/windows/service"
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)
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const (
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serviceName = "kubelet"
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)
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// getPriorityValue returns the value associated with a Windows process priorityClass
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// Ref: https://docs.microsoft.com/en-us/windows/win32/cimwin32prov/setpriority-method-in-class-win32-process
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func getPriorityValue(priorityClassName string) uint32 {
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var priorityClassMap = map[string]uint32{
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"IDLE_PRIORITY_CLASS": uint32(64),
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"BELOW_NORMAL_PRIORITY_CLASS": uint32(16384),
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"NORMAL_PRIORITY_CLASS": uint32(32),
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"ABOVE_NORMAL_PRIORITY_CLASS": uint32(32768),
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"HIGH_PRIORITY_CLASS": uint32(128),
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"REALTIME_PRIORITY_CLASS": uint32(256),
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}
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return priorityClassMap[priorityClassName]
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}
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func initForOS(windowsService bool, windowsPriorityClass string) error {
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priority := getPriorityValue(windowsPriorityClass)
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if priority == 0 {
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return fmt.Errorf("unknown priority class %s, valid ones are available at "+
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"https://docs.microsoft.com/en-us/windows/win32/procthread/scheduling-priorities", windowsPriorityClass)
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}
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kubeletProcessHandle := windows.CurrentProcess()
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// Set the priority of the kubelet process to given priority
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klog.Infof("Setting the priority of kubelet process to %s", windowsPriorityClass)
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if err := windows.SetPriorityClass(kubeletProcessHandle, priority); err != nil {
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return err
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}
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if windowsService {
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return service.InitService(serviceName)
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}
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return nil
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}
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