/
main.go
137 lines (107 loc) · 4.39 KB
/
main.go
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package main
import (
"flag"
"time"
"github.com/kubernetes-sigs/custom-metrics-apiserver/pkg/dynamicmapper"
informers2 "github.com/lterrac/system-autoscaler/pkg/informers"
sainformers "github.com/lterrac/system-autoscaler/pkg/generated/informers/externalversions"
cm "github.com/lterrac/system-autoscaler/pkg/pod-autoscaler/pkg/contention-manager"
metricsgetter "github.com/lterrac/system-autoscaler/pkg/pod-autoscaler/pkg/metrics"
resupd "github.com/lterrac/system-autoscaler/pkg/pod-autoscaler/pkg/pod-resource-updater"
"github.com/lterrac/system-autoscaler/pkg/podscale-controller/pkg/types"
metricsclient "k8s.io/metrics/pkg/client/custom_metrics"
coreinformers "k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/klog/v2"
// Uncomment the following line to load the gcp plugin (only required to authenticate against GKE clusters).
// _ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
clientset "github.com/lterrac/system-autoscaler/pkg/generated/clientset/versioned"
"github.com/lterrac/system-autoscaler/pkg/pod-autoscaler/pkg/recommender"
"github.com/lterrac/system-autoscaler/pkg/signals"
)
var (
masterURL string
kubeconfig string
)
func main() {
klog.InitFlags(nil)
flag.Parse()
// set up signals so we handle the first shutdown signal gracefully
stopCh := signals.SetupSignalHandler()
cfg, err := clientcmd.BuildConfigFromFlags(masterURL, kubeconfig)
if err != nil {
klog.Fatalf("Error building kubeconfig: %s", err.Error())
}
client, err := clientset.NewForConfig(cfg)
if err != nil {
klog.Fatalf("Error building system-autoscaler clientset: %s", err.Error())
}
kubernetesClient, err := kubernetes.NewForConfig(cfg)
if err != nil {
klog.Fatalf("Error building kubernetes clientset: %s", err.Error())
}
//TODO: tune refresh interval
mapper, err := dynamicmapper.NewRESTMapper(kubernetesClient, time.Second)
if err != nil {
klog.Fatalf("Error building REST Mapper: %s", err.Error())
}
metricsGetter := metricsgetter.NewDefaultGetter(cfg, mapper, metricsclient.NewAvailableAPIsGetter(kubernetesClient))
saInformerFactory := sainformers.NewSharedInformerFactory(client, time.Second*30)
coreInformerFactory := coreinformers.NewSharedInformerFactory(kubernetesClient, time.Second*30)
// TODO: Check name of this variable
informers := informers2.Informers{
Pod: coreInformerFactory.Core().V1().Pods(),
Node: coreInformerFactory.Core().V1().Nodes(),
Service: coreInformerFactory.Core().V1().Services(),
PodScale: saInformerFactory.Systemautoscaler().V1beta1().PodScales(),
ServiceLevelAgreement: saInformerFactory.Systemautoscaler().V1beta1().ServiceLevelAgreements(),
}
//TODO: should be renamed
//TODO: we should try without buffer
recommenderOut := make(chan types.NodeScales, 10000)
contentionManagerOut := make(chan types.NodeScales, 10000)
// TODO: adjust arguments to recommender
recommenderController := recommender.NewController(
kubernetesClient,
client,
metricsGetter,
informers,
recommenderOut,
)
contentionManagerController := cm.NewController(
kubernetesClient,
client,
informers,
recommenderOut,
contentionManagerOut,
)
updaterController := resupd.NewController(
kubernetesClient,
client,
informers,
contentionManagerOut,
)
// notice that there is no need to run Start methods in a separate goroutine. (i.e. go kubeInformerFactory.Start(stopCh)
// Start method is non-blocking and runs all registered safactory in a dedicated goroutine.
saInformerFactory.Start(stopCh)
coreInformerFactory.Start(stopCh)
if err = recommenderController.Run(4, stopCh); err != nil {
klog.Fatalf("Error running recommender: %s", err.Error())
}
defer recommenderController.Shutdown()
if err = contentionManagerController.Run(4, stopCh); err != nil {
klog.Fatalf("Error running update controller: %s", err.Error())
}
defer contentionManagerController.Shutdown()
if err = updaterController.Run(4, stopCh); err != nil {
klog.Fatalf("Error running update controller: %s", err.Error())
}
defer updaterController.Shutdown()
<-stopCh
klog.Info("Shutting down workers")
}
func init() {
flag.StringVar(&kubeconfig, "kubeconfig", "", "Path to a kubeconfig. Only required if out-of-cluster.")
flag.StringVar(&masterURL, "master", "", "The address of the Kubernetes API server. Overrides any value in kubeconfig. Only required if out-of-cluster.")
}