62 lines
2.0 KiB
Go
62 lines
2.0 KiB
Go
/*
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Copyright 2016 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 estimator
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import (
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"fmt"
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apiv1 "k8s.io/api/core/v1"
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"k8s.io/autoscaler/cluster-autoscaler/simulator"
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"k8s.io/klog"
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schedulernodeinfo "k8s.io/kubernetes/pkg/scheduler/nodeinfo"
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)
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const (
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// BinpackingEstimatorName is the name of binpacking estimator.
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BinpackingEstimatorName = "binpacking"
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// OldBinpackingEstimatorName is the name of the older binpacking estimator.
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OldBinpackingEstimatorName = "oldbinpacking"
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)
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// AvailableEstimators is a list of available estimators.
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var AvailableEstimators = []string{BinpackingEstimatorName, OldBinpackingEstimatorName}
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// Estimator calculates the number of nodes of given type needed to schedule pods.
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type Estimator interface {
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Estimate([]*apiv1.Pod, *schedulernodeinfo.NodeInfo, []*schedulernodeinfo.NodeInfo) int
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}
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// EstimatorBuilder creates a new estimator object.
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type EstimatorBuilder func(*simulator.PredicateChecker) Estimator
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// NewEstimatorBuilder creates a new estimator object from flag.
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func NewEstimatorBuilder(name string) (EstimatorBuilder, error) {
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switch name {
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case BinpackingEstimatorName:
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return func(predicateChecker *simulator.PredicateChecker) Estimator {
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return NewBinpackingNodeEstimator(predicateChecker)
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}, nil
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// Deprecated.
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case OldBinpackingEstimatorName:
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klog.Warning(oldBinPackingEstimatorDeprecationMessage)
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return func(predicateChecker *simulator.PredicateChecker) Estimator {
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return NewOldBinpackingNodeEstimator(predicateChecker)
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}, nil
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}
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return nil, fmt.Errorf("unknown estimator: %s", name)
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}
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