main.go

// SPDX-License-Identifier: MIT
package main

import (
	"flag"
	"os"

	"github.com/Daimler/namespace-provisioner/pkg/controllers"
	"github.com/Daimler/namespace-provisioner/pkg/util"
	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"
)

var (
	scheme   = runtime.NewScheme()
	setupLog = ctrl.Log.WithName("setup")
)

func init() {
	_ = clientgoscheme.AddToScheme(scheme)

	_ = corev1.AddToScheme(scheme)
}

func main() {
	var metricsAddr string
	var enableLeaderElection bool
	flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
	flag.BoolVar(&enableLeaderElection, "enable-leader-election", false,
		"Enable leader election for controller manager. Enabling this will ensure there is only one active controller manager.")
	flag.Parse()

	logLevel := util.GetLogLevel(setupLog)

	if logLevel == "DEBUG" {
		ctrl.SetLogger(zap.New(zap.UseDevMode(true)))
	} else {
		ctrl.SetLogger(zap.New(zap.UseDevMode(false)))
	}

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:             scheme,
		MetricsBindAddress: metricsAddr,
		LeaderElection:     enableLeaderElection,
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	configNamespace := util.GetConfigNamespace(setupLog)
	err = (&controllers.NamespaceReconciler{
		Client:              mgr.GetClient(),
		Log:                 ctrl.Log.WithName("controllers").WithName("Namespace"),
		ConfigNamespaceName: configNamespace,
	}).SetupWithManager(mgr)
	if err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "Namespace")
		os.Exit(1)
	}

	setupLog.Info("starting manager")
	if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
		setupLog.Error(err, "problem running manager")
		os.Exit(1)
	}
}