/
main.go
133 lines (109 loc) · 4.06 KB
/
main.go
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package main
import (
"flag"
"net/http"
"os"
"path/filepath"
"time"
"github.com/ca-gip/kotary/internal/controller"
"github.com/ca-gip/kotary/internal/utils"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/troian/healthcheck"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/klog/v2"
clientset "github.com/ca-gip/kotary/pkg/generated/clientset/versioned"
informers "github.com/ca-gip/kotary/pkg/generated/informers/externalversions"
kubeinformers "k8s.io/client-go/informers"
)
var (
masterURL string
kubeconfig string
)
const resyncPeriod = time.Minute * 30
func main() {
flag.StringVar(&kubeconfig, "kubeconfig", defaultKubeconfig(), "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.")
klog.InitFlags(nil)
flag.Parse()
// Load kube config
cfg, err := rest.InClusterConfig()
if err != nil {
cfg, err = clientcmd.BuildConfigFromFlags(masterURL, kubeconfig)
if err != nil {
klog.Fatalf("Error building kubeconfig: %s", err.Error())
}
}
// Generate clientsets
settingsClient, err := kubernetes.NewForConfig(cfg)
if err != nil {
klog.Fatalf("Error building kubernetes clientset: %s", err.Error())
}
namespaceClient, err := kubernetes.NewForConfig(cfg)
if err != nil {
klog.Fatalf("Error building kubernetes clientset: %s", err.Error())
}
quotaClient, err := kubernetes.NewForConfig(cfg)
if err != nil {
klog.Fatalf("Error building kubernetes clientset: %s", err.Error())
}
nodeClient, err := kubernetes.NewForConfig(cfg)
if err != nil {
klog.Fatalf("Error building kubernetes clientset: %s", err.Error())
}
podClient, err := kubernetes.NewForConfig(cfg)
if err != nil {
klog.Fatalf("Error building kubernetes clientset: %s", err.Error())
}
quotaClaimClient, err := clientset.NewForConfig(cfg)
if err != nil {
klog.Fatalf("Error building kubernetes clientset: %s", err.Error())
}
// Prometheus metrics endpoint
http.Handle("/metrics", promhttp.Handler())
go http.ListenAndServe(":9080", nil)
// Load config
settingsManger := utils.NewSettingManger(settingsClient)
settingsManger.Load()
namespaceInformerFactory := kubeinformers.NewSharedInformerFactory(namespaceClient, resyncPeriod)
quotaInformerFactory := kubeinformers.NewSharedInformerFactory(quotaClient, resyncPeriod)
nodeInformerFactory := kubeinformers.NewSharedInformerFactory(nodeClient, resyncPeriod)
podInformerFactory := kubeinformers.NewSharedInformerFactory(podClient, resyncPeriod)
quotaClaimInformerFactory := informers.NewSharedInformerFactory(quotaClaimClient, resyncPeriod)
kotaryController := controller.NewController(
settingsManger.Conf,
namespaceClient, quotaClient, nodeClient, podClient, quotaClaimClient,
namespaceInformerFactory.Core().V1().Namespaces(),
quotaInformerFactory.Core().V1().ResourceQuotas(),
nodeInformerFactory.Core().V1().Nodes(),
podInformerFactory.Core().V1().Pods(),
quotaClaimInformerFactory.Cagip().V1().ResourceQuotaClaims())
// Liveness and Readiness probes
health := healthcheck.NewHandler()
_ = health.AddLivenessCheck("goroutine-threshold", healthcheck.GoroutineCountCheck(100))
_ = health.AddReadinessCheck("sync-shared-informer", kotaryController.SharedInformersState)
go http.ListenAndServe(":8086", health)
// Start all the informeer
namespaceInformerFactory.Start(wait.NeverStop)
quotaInformerFactory.Start(wait.NeverStop)
nodeInformerFactory.Start(wait.NeverStop)
podInformerFactory.Start(wait.NeverStop)
quotaClaimInformerFactory.Start(wait.NeverStop)
if err = kotaryController.Run(2, wait.NeverStop); err != nil {
klog.Fatalf("Error running controller: %s", err.Error())
}
}
func defaultKubeconfig() string {
fname := os.Getenv("KUBECONFIG")
if fname != "" {
return fname
}
home, err := os.UserHomeDir()
if err != nil {
klog.Warningf("failed to get home directory: %v", err)
return ""
}
return filepath.Join(home, ".kube", "config")
}