51 lines
1.8 KiB
Go
51 lines
1.8 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 expander
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import (
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"k8s.io/autoscaler/cluster-autoscaler/cloudprovider"
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apiv1 "k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/plugin/pkg/scheduler/schedulercache"
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)
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var (
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// AvailableExpanders is a list of available expander options
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AvailableExpanders = []string{RandomExpanderName, MostPodsExpanderName, LeastWasteExpanderName, PriceBasedExpanderName}
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// RandomExpanderName selects a node group at random
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RandomExpanderName = "random"
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// MostPodsExpanderName selects a node group that fits the most pods
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MostPodsExpanderName = "most-pods"
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// LeastWasteExpanderName selects a node group that leaves the least fraction of CPU and Memory
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LeastWasteExpanderName = "least-waste"
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// PriceBasedExpanderName selects a node group that is the most cost-effective and consistent with
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// the preferred node size for the cluster
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PriceBasedExpanderName = "price"
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)
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// Option describes an option to expand the cluster.
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type Option struct {
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NodeGroup cloudprovider.NodeGroup
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NodeCount int
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Debug string
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Pods []*apiv1.Pod
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}
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// Strategy describes an interface for selecting the best option when scaling up
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type Strategy interface {
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BestOption(options []Option, nodeInfo map[string]*schedulercache.NodeInfo) *Option
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}
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