mirror of https://github.com/k3s-io/k3s
56 lines
2.2 KiB
Go
56 lines
2.2 KiB
Go
/*
|
|
Copyright 2016 The Kubernetes 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 priorities
|
|
|
|
import (
|
|
schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
|
|
"k8s.io/kubernetes/pkg/scheduler/schedulercache"
|
|
)
|
|
|
|
var (
|
|
mostResourcePriority = &ResourceAllocationPriority{"MostResourceAllocation", mostResourceScorer}
|
|
|
|
// MostRequestedPriorityMap is a priority function that favors nodes with most requested resources.
|
|
// It calculates the percentage of memory and CPU requested by pods scheduled on the node, and prioritizes
|
|
// based on the maximum of the average of the fraction of requested to capacity.
|
|
// Details: (cpu(10 * sum(requested) / capacity) + memory(10 * sum(requested) / capacity)) / 2
|
|
MostRequestedPriorityMap = mostResourcePriority.PriorityMap
|
|
)
|
|
|
|
func mostResourceScorer(requested, allocable *schedulercache.Resource, includeVolumes bool, requestedVolumes int, allocatableVolumes int) int64 {
|
|
return (mostRequestedScore(requested.MilliCPU, allocable.MilliCPU) +
|
|
mostRequestedScore(requested.Memory, allocable.Memory)) / 2
|
|
}
|
|
|
|
// The used capacity is calculated on a scale of 0-10
|
|
// 0 being the lowest priority and 10 being the highest.
|
|
// The more resources are used the higher the score is. This function
|
|
// is almost a reversed version of least_requested_priority.calculatUnusedScore
|
|
// (10 - calculateUnusedScore). The main difference is in rounding. It was added to
|
|
// keep the final formula clean and not to modify the widely used (by users
|
|
// in their default scheduling policies) calculateUSedScore.
|
|
func mostRequestedScore(requested, capacity int64) int64 {
|
|
if capacity == 0 {
|
|
return 0
|
|
}
|
|
if requested > capacity {
|
|
return 0
|
|
}
|
|
|
|
return (requested * schedulerapi.MaxPriority) / capacity
|
|
}
|