mirror of https://github.com/k3s-io/k3s
64 lines
2.5 KiB
Go
64 lines
2.5 KiB
Go
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/*
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Copyright 2014 Google Inc. All rights reserved.
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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 scheduler
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import (
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/resources"
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"github.com/golang/glog"
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)
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// Calculate the occupancy on a node. 'node' has information about the resources on the node.
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// 'pods' is a list of pods currently scheduled on the node.
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func calculateOccupancy(node api.Minion, pods []api.Pod) HostPriority {
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totalCPU := 0
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totalMemory := 0
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for ix := range pods {
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for cIx := range pods[ix].DesiredState.Manifest.Containers {
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container := &(pods[ix].DesiredState.Manifest.Containers[cIx])
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totalCPU += container.CPU
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totalMemory += container.Memory
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}
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}
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percentageCPU := (totalCPU * 100) / resources.GetIntegerResource(node.NodeResources.Capacity, resources.CPU, 0)
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percentageMemory := (totalMemory * 100) / resources.GetIntegerResource(node.NodeResources.Capacity, resources.Memory, 0)
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glog.V(4).Infof("Least Requested Priority, AbsoluteRequested: (%d, %d) Percentage:(%d\\%m, %d\\%)", totalCPU, totalMemory, percentageCPU, percentageMemory)
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return HostPriority{
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host: node.ID,
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score: int((percentageCPU + percentageMemory) / 2),
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}
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}
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// LeastRequestedPriority is a priority function that favors nodes with fewer requested resources.
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// It calculates the percentage of memory and CPU requested by pods scheduled on the node, and prioritizes
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// based on the minimum of the average of the fraction of requested to capacity.
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// Details: (Sum(requested cpu) / Capacity + Sum(requested memory) / Capacity) * 50
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func LeastRequestedPriority(pod api.Pod, podLister PodLister, minionLister MinionLister) (HostPriorityList, error) {
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nodes, err := minionLister.List()
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if err != nil {
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return HostPriorityList{}, err
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}
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podsToMachines, err := MapPodsToMachines(podLister)
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list := HostPriorityList{}
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for _, node := range nodes.Items {
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list = append(list, calculateOccupancy(node, podsToMachines[node.ID]))
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}
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return list, nil
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}
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