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main.go
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main.go
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/*
SPDX-FileCopyrightText: 2021 SAP SE or an SAP affiliate company and Gardener contributors
SPDX-License-Identifier: Apache-2.0
*/
package main
import (
"context"
"flag"
"fmt"
"os"
gardencorev1alpha1 "github.com/gardener/gardener/pkg/apis/core/v1alpha1"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
"k8s.io/apimachinery/pkg/runtime"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/healthz"
"sigs.k8s.io/controller-runtime/pkg/log/zap"
"sigs.k8s.io/controller-runtime/pkg/webhook"
"github.com/gardener/gardenlogin-controller-manager/controllers"
"github.com/gardener/gardenlogin-controller-manager/internal/util"
"github.com/gardener/gardenlogin-controller-manager/webhooks"
)
var (
scheme = runtime.NewScheme()
setupLog = ctrl.Log.WithName("setup")
)
func init() {
//+kubebuilder:scaffold:scheme
utilruntime.Must(clientgoscheme.AddToScheme(scheme))
utilruntime.Must(gardencorev1alpha1.AddToScheme(scheme))
utilruntime.Must(gardencorev1beta1.AddToScheme(scheme))
}
func main() {
var (
metricsAddr string
enableLeaderElection bool
probeAddr string
certDir string
configFile string
)
flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
flag.BoolVar(&enableLeaderElection, "leader-elect", false,
"Enable leader election for controller manager. "+
"Enabling this will ensure there is only one active controller manager.")
flag.StringVar(&certDir, "cert-dir", "/tmp/k8s-webhook-server/serving-certs", "CertDir is the directory that contains the server key and certificate.")
flag.StringVar(&configFile, "config-file", "/etc/gardenlogin-controller-manager/config.yaml", "The path to the configuration file.")
opts := zap.Options{
Development: true,
}
opts.BindFlags(flag.CommandLine)
flag.Parse()
cmConfig, err := util.ReadControllerManagerConfiguration(configFile)
if err != nil {
fmt.Printf("error reading config: %s", err.Error()) // Logger not yet set up
os.Exit(1)
}
ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
Scheme: scheme,
MetricsBindAddress: metricsAddr,
Port: 9443,
HealthProbeBindAddress: probeAddr,
LeaderElection: enableLeaderElection,
LeaderElectionID: "40ca8637.gardener.cloud",
})
if err != nil {
setupLog.Error(err, "unable to start manager")
os.Exit(1)
}
ctx := context.Background()
if err = (&controllers.ShootReconciler{
Client: mgr.GetClient(),
Log: ctrl.Log.WithName("controllers").WithName("Shoot"),
Scheme: mgr.GetScheme(),
Config: cmConfig,
ReconcilerCountPerNamespace: map[string]int{},
}).SetupWithManager(ctx, mgr, cmConfig.Controllers.Shoot); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "Shoot")
os.Exit(1)
}
//+kubebuilder:scaffold:builder
if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
setupLog.Error(err, "unable to set up health check")
os.Exit(1)
}
if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
setupLog.Error(err, "unable to set up ready check")
os.Exit(1)
}
// Setup webhooks
setupLog.Info("setting up webhook server")
hookServer := &webhook.Server{
CertDir: certDir,
}
if err := mgr.Add(hookServer); err != nil {
setupLog.Error(err, "unable register webhook server with manager")
os.Exit(1)
}
setupLog.Info("registering webhooks to the webhook server")
hookServer.Register("/validate-configmap", &webhook.Admission{Handler: &webhooks.ConfigmapValidator{
Log: ctrl.Log.WithName("webhooks").WithName("ConfigmapValidation"),
Config: cmConfig,
}})
setupLog.Info("starting manager")
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
setupLog.Error(err, "problem running manager")
os.Exit(1)
}
}