78 lines
3.1 KiB
Go
78 lines
3.1 KiB
Go
/*
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Copyright 2018 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 nodegroupset
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import (
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"fmt"
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"k8s.io/autoscaler/cluster-autoscaler/cloudprovider"
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"k8s.io/autoscaler/cluster-autoscaler/context"
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"k8s.io/autoscaler/cluster-autoscaler/utils/errors"
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schedulerframework "k8s.io/kubernetes/pkg/scheduler/framework"
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)
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// ScaleUpInfo contains information about planned scale-up of a single NodeGroup
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type ScaleUpInfo struct {
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// Group is the group to be scaled-up
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Group cloudprovider.NodeGroup
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// CurrentSize is the current size of the Group
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CurrentSize int
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// NewSize is the size the Group will be scaled-up to
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NewSize int
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// MaxSize is the maximum allowed size of the Group
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MaxSize int
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}
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// String is used for printing ScaleUpInfo for logging, etc
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func (s ScaleUpInfo) String() string {
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return fmt.Sprintf("{%v %v->%v (max: %v)}", s.Group.Id(), s.CurrentSize, s.NewSize, s.MaxSize)
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}
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// NodeGroupSetProcessor finds nodegroups that are similar and allows balancing scale-up between them.
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type NodeGroupSetProcessor interface {
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FindSimilarNodeGroups(context *context.AutoscalingContext, nodeGroup cloudprovider.NodeGroup,
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nodeInfosForGroups map[string]*schedulerframework.NodeInfo) ([]cloudprovider.NodeGroup, errors.AutoscalerError)
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BalanceScaleUpBetweenGroups(context *context.AutoscalingContext, groups []cloudprovider.NodeGroup, newNodes int) ([]ScaleUpInfo, errors.AutoscalerError)
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CleanUp()
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}
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// NoOpNodeGroupSetProcessor returns no similar node groups and doesn't do any balancing.
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type NoOpNodeGroupSetProcessor struct {
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}
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// FindSimilarNodeGroups returns a list of NodeGroups similar to the one provided in parameter.
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func (n *NoOpNodeGroupSetProcessor) FindSimilarNodeGroups(context *context.AutoscalingContext, nodeGroup cloudprovider.NodeGroup,
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nodeInfosForGroups map[string]*schedulerframework.NodeInfo) ([]cloudprovider.NodeGroup, errors.AutoscalerError) {
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return []cloudprovider.NodeGroup{}, nil
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}
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// BalanceScaleUpBetweenGroups splits a scale-up between provided NodeGroups.
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func (n *NoOpNodeGroupSetProcessor) BalanceScaleUpBetweenGroups(context *context.AutoscalingContext, groups []cloudprovider.NodeGroup, newNodes int) ([]ScaleUpInfo, errors.AutoscalerError) {
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return []ScaleUpInfo{}, nil
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}
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// CleanUp performs final clean up of processor state.
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func (n *NoOpNodeGroupSetProcessor) CleanUp() {}
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// NewDefaultNodeGroupSetProcessor creates an instance of NodeGroupSetProcessor.
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func NewDefaultNodeGroupSetProcessor(ignoredLabels []string) NodeGroupSetProcessor {
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return &BalancingNodeGroupSetProcessor{
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Comparator: CreateGenericNodeInfoComparator(ignoredLabels),
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}
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}
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