mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-11-03 19:58:17 +00:00
93 lines
4.2 KiB
Go
93 lines
4.2 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 app implements a server that runs a set of active
|
|
// components. This includes replication controllers, service endpoints and
|
|
// nodes.
|
|
package app
|
|
|
|
import (
|
|
"context"
|
|
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
"k8s.io/client-go/dynamic"
|
|
"k8s.io/client-go/scale"
|
|
"k8s.io/controller-manager/controller"
|
|
"k8s.io/kubernetes/pkg/controller/podautoscaler"
|
|
"k8s.io/kubernetes/pkg/controller/podautoscaler/metrics"
|
|
|
|
resourceclient "k8s.io/metrics/pkg/client/clientset/versioned/typed/metrics/v1beta1"
|
|
"k8s.io/metrics/pkg/client/custom_metrics"
|
|
"k8s.io/metrics/pkg/client/external_metrics"
|
|
)
|
|
|
|
func startHPAController(ctx context.Context, controllerContext ControllerContext) (controller.Interface, bool, error) {
|
|
if !controllerContext.AvailableResources[schema.GroupVersionResource{Group: "autoscaling", Version: "v1", Resource: "horizontalpodautoscalers"}] {
|
|
return nil, false, nil
|
|
}
|
|
|
|
return startHPAControllerWithRESTClient(ctx, controllerContext)
|
|
}
|
|
|
|
func startHPAControllerWithRESTClient(ctx context.Context, controllerContext ControllerContext) (controller.Interface, bool, error) {
|
|
clientConfig := controllerContext.ClientBuilder.ConfigOrDie("horizontal-pod-autoscaler")
|
|
hpaClient := controllerContext.ClientBuilder.ClientOrDie("horizontal-pod-autoscaler")
|
|
|
|
apiVersionsGetter := custom_metrics.NewAvailableAPIsGetter(hpaClient.Discovery())
|
|
// invalidate the discovery information roughly once per resync interval our API
|
|
// information is *at most* two resync intervals old.
|
|
go custom_metrics.PeriodicallyInvalidate(
|
|
apiVersionsGetter,
|
|
controllerContext.ComponentConfig.HPAController.HorizontalPodAutoscalerSyncPeriod.Duration,
|
|
ctx.Done())
|
|
|
|
metricsClient := metrics.NewRESTMetricsClient(
|
|
resourceclient.NewForConfigOrDie(clientConfig),
|
|
custom_metrics.NewForConfig(clientConfig, controllerContext.RESTMapper, apiVersionsGetter),
|
|
external_metrics.NewForConfigOrDie(clientConfig),
|
|
)
|
|
return startHPAControllerWithMetricsClient(ctx, controllerContext, metricsClient)
|
|
}
|
|
|
|
func startHPAControllerWithMetricsClient(ctx context.Context, controllerContext ControllerContext, metricsClient metrics.MetricsClient) (controller.Interface, bool, error) {
|
|
hpaClient := controllerContext.ClientBuilder.ClientOrDie("horizontal-pod-autoscaler")
|
|
hpaClientConfig := controllerContext.ClientBuilder.ConfigOrDie("horizontal-pod-autoscaler")
|
|
|
|
// we don't use cached discovery because DiscoveryScaleKindResolver does its own caching,
|
|
// so we want to re-fetch every time when we actually ask for it
|
|
scaleKindResolver := scale.NewDiscoveryScaleKindResolver(hpaClient.Discovery())
|
|
scaleClient, err := scale.NewForConfig(hpaClientConfig, controllerContext.RESTMapper, dynamic.LegacyAPIPathResolverFunc, scaleKindResolver)
|
|
if err != nil {
|
|
return nil, false, err
|
|
}
|
|
|
|
go podautoscaler.NewHorizontalController(
|
|
hpaClient.CoreV1(),
|
|
scaleClient,
|
|
hpaClient.AutoscalingV2(),
|
|
controllerContext.RESTMapper,
|
|
metricsClient,
|
|
controllerContext.InformerFactory.Autoscaling().V2().HorizontalPodAutoscalers(),
|
|
controllerContext.InformerFactory.Core().V1().Pods(),
|
|
controllerContext.ComponentConfig.HPAController.HorizontalPodAutoscalerSyncPeriod.Duration,
|
|
controllerContext.ComponentConfig.HPAController.HorizontalPodAutoscalerDownscaleStabilizationWindow.Duration,
|
|
controllerContext.ComponentConfig.HPAController.HorizontalPodAutoscalerTolerance,
|
|
controllerContext.ComponentConfig.HPAController.HorizontalPodAutoscalerCPUInitializationPeriod.Duration,
|
|
controllerContext.ComponentConfig.HPAController.HorizontalPodAutoscalerInitialReadinessDelay.Duration,
|
|
).Run(ctx, int(controllerContext.ComponentConfig.HPAController.ConcurrentHorizontalPodAutoscalerSyncs))
|
|
return nil, true, nil
|
|
}
|