73 lines
2.8 KiB
Go
73 lines
2.8 KiB
Go
/*
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Copyright 2017 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 core
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import (
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"k8s.io/autoscaler/cluster-autoscaler/config/dynamic"
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"k8s.io/autoscaler/cluster-autoscaler/simulator"
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"k8s.io/autoscaler/cluster-autoscaler/utils/errors"
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kube_util "k8s.io/autoscaler/cluster-autoscaler/utils/kubernetes"
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kube_client "k8s.io/client-go/kubernetes"
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kube_record "k8s.io/client-go/tools/record"
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)
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// AutoscalerBuilder builds an instance of Autoscaler which is the core of CA
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type AutoscalerBuilder interface {
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SetDynamicConfig(config dynamic.Config) AutoscalerBuilder
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Build() (Autoscaler, errors.AutoscalerError)
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}
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// AutoscalerBuilderImpl builds new autoscalers from its state including initial `AutoscalingOptions` given at startup and
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// `dynamic.Config` read on demand from the configmap
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type AutoscalerBuilderImpl struct {
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autoscalingOptions AutoscalingOptions
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dynamicConfig *dynamic.Config
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kubeClient kube_client.Interface
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kubeEventRecorder kube_record.EventRecorder
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predicateChecker *simulator.PredicateChecker
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listerRegistry kube_util.ListerRegistry
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}
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// NewAutoscalerBuilder builds an AutoscalerBuilder from required parameters
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func NewAutoscalerBuilder(autoscalingOptions AutoscalingOptions, predicateChecker *simulator.PredicateChecker,
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kubeClient kube_client.Interface, kubeEventRecorder kube_record.EventRecorder, listerRegistry kube_util.ListerRegistry) *AutoscalerBuilderImpl {
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return &AutoscalerBuilderImpl{
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autoscalingOptions: autoscalingOptions,
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kubeClient: kubeClient,
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kubeEventRecorder: kubeEventRecorder,
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predicateChecker: predicateChecker,
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listerRegistry: listerRegistry,
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}
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}
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// SetDynamicConfig sets an instance of dynamic.Config read from a configmap so that
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// the new autoscaler built afterwards reflect the latest configuration contained in the configmap
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func (b *AutoscalerBuilderImpl) SetDynamicConfig(config dynamic.Config) AutoscalerBuilder {
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b.dynamicConfig = &config
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return b
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}
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// Build an autoscaler according to the builder's state
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func (b *AutoscalerBuilderImpl) Build() (Autoscaler, errors.AutoscalerError) {
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options := b.autoscalingOptions
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if b.dynamicConfig != nil {
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c := *(b.dynamicConfig)
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options.NodeGroups = c.NodeGroupSpecStrings()
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}
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return NewStaticAutoscaler(options, b.predicateChecker, b.kubeClient, b.kubeEventRecorder, b.listerRegistry)
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}
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