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hpa.go
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hpa.go
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package controller
import (
hpacontroller "k8s.io/kubernetes/pkg/controller/podautoscaler"
hpametrics "k8s.io/kubernetes/pkg/controller/podautoscaler/metrics"
osclient "github.com/openshift/origin/pkg/client"
"github.com/openshift/origin/pkg/cmd/server/bootstrappolicy"
clientgoclientset "k8s.io/client-go/kubernetes"
kubecontroller "k8s.io/kubernetes/cmd/kube-controller-manager/app"
kubeclientset "k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
)
// NB: this is funky -- it's actually a Kubernetes controller, but we run it as an OpenShift controller in order
// to get a handle on OpenShift clients, so that our delegating scales getter can work.
type HorizontalPodAutoscalerControllerConfig struct {
HeapsterNamespace string
}
func (c *HorizontalPodAutoscalerControllerConfig) RunController(ctx kubecontroller.ControllerContext) (bool, error) {
hpaClientConfig := ctx.ClientBuilder.ConfigOrDie(bootstrappolicy.InfraHorizontalPodAutoscalerControllerServiceAccountName)
hpaClient, err := kubeclientset.NewForConfig(hpaClientConfig)
if err != nil {
return false, err
}
// use the Kubernetes config so that the service account is in the same name namespace for both clients
hpaOriginClient, err := osclient.New(hpaClientConfig)
if err != nil {
return false, err
}
hpaEventsClient, err := clientgoclientset.NewForConfig(hpaClientConfig)
if err != nil {
return false, err
}
metricsClient := hpametrics.NewHeapsterMetricsClient(
hpaClient,
c.HeapsterNamespace,
"https",
"heapster",
"",
)
replicaCalc := hpacontroller.NewReplicaCalculator(metricsClient, hpaClient.Core())
delegatingScalesGetter := osclient.NewDelegatingScaleNamespacer(hpaOriginClient, hpaClient.ExtensionsV1beta1())
go hpacontroller.NewHorizontalController(
hpaEventsClient.Core(),
delegatingScalesGetter,
hpaClient.Autoscaling(),
replicaCalc,
ctx.InformerFactory.Autoscaling().V1().HorizontalPodAutoscalers(),
ctx.Options.HorizontalPodAutoscalerSyncPeriod.Duration,
ctx.Options.HorizontalPodAutoscalerUpscaleForbiddenWindow.Duration,
ctx.Options.HorizontalPodAutoscalerDownscaleForbiddenWindow.Duration,
).Run(ctx.Stop)
return true, nil
}