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Add network-topology-aware plugin and hyperNode score callback
Signed-off-by: ecosysbin <14729934+ecosysbin@user.noreply.gitee.com>
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151 changes: 151 additions & 0 deletions
151
pkg/scheduler/plugins/networktopologyaware/networktopologyaware.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| /* | ||
| Copyright 2019 The Volcano 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. | ||
| */ | ||
|
|
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| package networktopologyaware | ||
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||
| import ( | ||
| "math" | ||
|
|
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| "k8s.io/klog/v2" | ||
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| "volcano.sh/volcano/pkg/scheduler/api" | ||
| "volcano.sh/volcano/pkg/scheduler/framework" | ||
| "volcano.sh/volcano/pkg/scheduler/util" | ||
| ) | ||
|
|
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| const ( | ||
| // PluginName indicates name of volcano scheduler plugin. | ||
| PluginName = "networktopologyaware" | ||
| BaseScore = 100 | ||
| TaskBaseScore = 10 | ||
| NetworkTopologyWeight = "weight" | ||
| ) | ||
|
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| // HyperNodeTree is the hypernode tree of all hypernodes in the cluster. | ||
| // currentJobLCAHyperNode is the hypernode of the job's LCAHyperNode. | ||
| var ( | ||
| HyperNodeTree []map[string][]string | ||
| ) | ||
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| type networkTopologyAwarePlugin struct { | ||
| // Arguments given for the plugin | ||
| pluginArguments framework.Arguments | ||
| } | ||
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| // New function returns prioritizePlugin object | ||
| func New(arguments framework.Arguments) framework.Plugin { | ||
| return &networkTopologyAwarePlugin{ | ||
| pluginArguments: arguments, | ||
| } | ||
| } | ||
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| func (nta *networkTopologyAwarePlugin) Name() string { | ||
| return PluginName | ||
| } | ||
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| func calculateWeight(args framework.Arguments) int { | ||
| weight := 1 | ||
| args.GetInt(&weight, NetworkTopologyWeight) | ||
| return weight | ||
| } | ||
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| func (nta *networkTopologyAwarePlugin) OnSessionOpen(ssn *framework.Session) { | ||
| klog.V(5).Infof("Enter networkTopologyAwarePlugin plugin ...") | ||
| defer func() { | ||
| klog.V(5).Infof("Leaving networkTopologyAware plugin ...") | ||
| }() | ||
|
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| weight := calculateWeight(nta.pluginArguments) | ||
| hyperNodeFn := func(job *api.JobInfo, hyperNodes map[string][]*api.NodeInfo) (map[string]float64, error) { | ||
| hyperNodeScores := make(map[string]float64) | ||
| for hyperNode := range hyperNodes { | ||
| score := networkTopologyAwareScore(hyperNode, job, HyperNodeTree) | ||
| score *= float64(weight) | ||
| hyperNodeScores[hyperNode] = score | ||
| } | ||
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| klog.V(1).Infof("networkTopologyAware score is: %v", hyperNodeScores) | ||
| return hyperNodeScores, nil | ||
| } | ||
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| nodeFn := func(task *api.TaskInfo, nodes []*api.NodeInfo) (map[string]float64, error) { | ||
| taskJob := ssn.Jobs[task.Job] | ||
| nodeScores := make(map[string]float64) | ||
| for _, node := range nodes { | ||
| hyperNode := util.FindHyperNodeOfNode(node.Name, HyperNodeTree) | ||
| score := networkTopologyAwareScore(hyperNode, taskJob, HyperNodeTree) | ||
| score *= float64(weight) | ||
| nodeScores[node.Name] = score | ||
| } | ||
| klog.V(1).Infof("networkTopologyAware score is: %v", nodeScores) | ||
| return nodeScores, nil | ||
| } | ||
|
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| ssn.AddHyperNodeOrederFn(nta.Name(), hyperNodeFn) | ||
| ssn.AddBatchNodeOrderFn(nta.Name(), nodeFn) | ||
| } | ||
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| func (bp *networkTopologyAwarePlugin) OnSessionClose(ssn *framework.Session) { | ||
| } | ||
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| // networkTopologyAwareScore use the best fit polices during scheduling. | ||
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| // Explanation: | ||
| // The currentJobLCAHyperNode is a property of job and that serves as the smallest root in the hypernode tree of job. | ||
| // A job has multiple tasks, each belonging to a hypernode. This LCAHyperNode is the topmost and lowest common ancestor among the hypernodes of all tasks within the job. | ||
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| // Goals: | ||
| // - The tier index to which the LCAHyperNode of a job belongs should be as low as possible. | ||
| // - Tasks under a job should be scheduled to one hyperNode as much as possible. | ||
| func networkTopologyAwareScore(hyperNodeName string, job *api.JobInfo, hyperNodeTree []map[string][]string) float64 { | ||
| jobHyperNode := job.PodGroup.GetAnnotations()[api.TopologyAllocateLCAHyperNode] | ||
| // job fist first scheduler. | ||
| if jobHyperNode == "" { | ||
| return BaseScore | ||
| } | ||
|
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| if jobHyperNode == hyperNodeName { | ||
| return BaseScore | ||
| } | ||
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| // Calculate hyperNode tier index score. | ||
| _, index := util.FindLCAHyperNode(hyperNodeName, jobHyperNode, hyperNodeTree) | ||
| if index <= 0 { | ||
| klog.V(4).Infof("find LCAhyperNode failed wtih %s in hyperNodeTree", hyperNodeName) | ||
| return 0.0 | ||
| } | ||
| tierIndexScore := BaseScore * scoreHyperNodeWithIndex(index, 1, len(hyperNodeTree)) | ||
|
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| // Calculate tasks num score. | ||
| taskNum := util.FindJobTaskNumOfHyperNode(hyperNodeName, job, hyperNodeTree) | ||
| taskNumScore := 0.0 | ||
| if len(job.Tasks) > 0 { | ||
| taskNumScore = TaskBaseScore * scoreHyperNodeWithTaskNum(taskNum, len(job.Tasks)) | ||
| } | ||
| // aggregate scores | ||
| return tierIndexScore + taskNumScore | ||
| } | ||
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| func scoreHyperNodeWithIndex(index int, minIndex int, maxIndex int) float64 { | ||
| // Use logarithmic operations to calculate scores and map the original values to the range between 0 and 1. | ||
| // Adjust the formula to ensure that the scores meet the requirements (excluding 0 and 1). | ||
| return (math.Log(float64(maxIndex)) - math.Log(float64(index))) / (math.Log(float64(maxIndex)) - math.Log(float64(minIndex))) | ||
| } | ||
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| func scoreHyperNodeWithTaskNum(taskNum int, maxTaskNum int) float64 { | ||
| // Calculate task distribution rate as score and make sure the score to the range between 0 and 1. | ||
| return float64(taskNum) / float64(maxTaskNum) | ||
| } |
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