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system_config.go
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/
system_config.go
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/*
Copyright 2022 The Koordinator 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 sysreconcile
import (
"strconv"
"time"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/klog/v2"
slov1alpha1 "github.com/koordinator-sh/koordinator/apis/slo/v1alpha1"
"github.com/koordinator-sh/koordinator/pkg/features"
"github.com/koordinator-sh/koordinator/pkg/koordlet/audit"
"github.com/koordinator-sh/koordinator/pkg/koordlet/qosmanager/framework"
"github.com/koordinator-sh/koordinator/pkg/koordlet/resourceexecutor"
"github.com/koordinator-sh/koordinator/pkg/koordlet/statesinformer"
sysutil "github.com/koordinator-sh/koordinator/pkg/koordlet/util/system"
)
const (
SystemConfigReconcileName = "SystemConfigReconcile"
)
type systemConfig struct {
reconcileInterval time.Duration
statesInformer statesinformer.StatesInformer
executor resourceexecutor.ResourceUpdateExecutor
}
var _ framework.QOSStrategy = &systemConfig{}
func New(opt *framework.Options) framework.QOSStrategy {
return &systemConfig{
reconcileInterval: time.Duration(opt.Config.ReconcileIntervalSeconds) * time.Second,
statesInformer: opt.StatesInformer,
executor: resourceexecutor.NewResourceUpdateExecutor(),
}
}
func (r *systemConfig) Enabled() bool {
return features.DefaultKoordletFeatureGate.Enabled(features.SystemConfig) && r.reconcileInterval > 0
}
func (r *systemConfig) Setup(context *framework.Context) {
}
func (r *systemConfig) Run(stopCh <-chan struct{}) {
r.init(stopCh)
go wait.Until(r.reconcile, r.reconcileInterval, stopCh)
}
func (s *systemConfig) init(stopCh <-chan struct{}) {
s.executor.Run(stopCh)
}
func (s *systemConfig) reconcile() {
nodeSLO := s.statesInformer.GetNodeSLO()
if nodeSLO == nil || nodeSLO.Spec.SystemStrategy == nil {
klog.Warningf("nodeSLO or systemStrategy is nil, skip reconcile systemConfig!")
return
}
node := s.statesInformer.GetNode()
if node == nil {
klog.Warningf("systemStrategy config failed, got nil node")
return
}
memoryCapacity := node.Status.Capacity.Memory().Value()
if memoryCapacity <= 0 {
klog.Warningf("systemStrategy config failed, node memoryCapacity not valid,value: %d", memoryCapacity)
return
}
var resources []resourceexecutor.ResourceUpdater
resources = append(resources, caculateMemoryConfig(nodeSLO.Spec.SystemStrategy, memoryCapacity)...)
s.executor.UpdateBatch(true, resources...)
klog.V(5).Infof("finish to reconcile system config!")
}
func caculateMemoryConfig(strategy *slov1alpha1.SystemStrategy, nodeMemory int64) []resourceexecutor.ResourceUpdater {
var resources []resourceexecutor.ResourceUpdater
if strategy.MinFreeKbytesFactor != nil {
totalMemory := nodeMemory / 1024 //to kbytes
if totalMemory <= 0 {
klog.Errorf("can not change min_free_kbytes! totalMemory invalid ,total memory = %v", totalMemory)
return resources
}
minFreeKbytes := totalMemory * *strategy.MinFreeKbytesFactor / 10000
if sysutil.ValidateResourceValue(&minFreeKbytes, "", sysutil.MinFreeKbytes) {
valueStr := strconv.FormatInt(minFreeKbytes, 10)
file := sysutil.MinFreeKbytes.Path("")
eventHelper := audit.V(3).Node().Reason("systemConfig reconcile").Message("update calculated mem config min_free_kbytes to : %v", valueStr)
resource, err := resourceexecutor.NewCommonDefaultUpdater(file, file, valueStr, eventHelper)
if err != nil {
return resources
}
resources = append(resources, resource)
}
}
if sysutil.ValidateResourceValue(strategy.WatermarkScaleFactor, "", sysutil.WatermarkScaleFactor) {
valueStr := strconv.FormatInt(*strategy.WatermarkScaleFactor, 10)
file := sysutil.WatermarkScaleFactor.Path("")
eventHelper := audit.V(3).Node().Reason("systemConfig reconcile").Message("update calculated mem config watermark_scale_factor to : %v", valueStr)
resource, err := resourceexecutor.NewCommonDefaultUpdater(file, file, valueStr, eventHelper)
if err != nil {
return resources
}
resources = append(resources, resource)
}
if sysutil.ValidateResourceValue(strategy.MemcgReapBackGround, "", sysutil.MemcgReapBackGround) {
valueStr := strconv.FormatInt(*strategy.MemcgReapBackGround, 10)
file := sysutil.MemcgReapBackGround.Path("")
eventHelper := audit.V(3).Node().Reason("systemConfig reconcile").Message("update calculated mem config reap_background to : %v", valueStr)
resource, err := resourceexecutor.NewCommonDefaultUpdater(file, file, valueStr, eventHelper)
if err != nil {
return resources
}
resources = append(resources, resource)
}
return resources
}