main.go

package main

import (
	"flag"
	"os"

	"github.com/mittwald/kube-av/pkg/engine"
	"github.com/mittwald/kube-av/pkg/util"
	"github.com/robfig/cron/v3"
	"github.com/spf13/pflag"

	// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
	// to ensure that exec-entrypoint and run can make use of them.
	_ "k8s.io/client-go/plugin/pkg/client/auth"

	"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"

	avv1beta1 "github.com/mittwald/kube-av/apis/av/v1beta1"
	"github.com/mittwald/kube-av/controllers"
	//+kubebuilder:scaffold:imports
)

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

func init() {
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))

	utilruntime.Must(avv1beta1.AddToScheme(scheme))
	//+kubebuilder:scaffold:scheme
}

func main() {
	var metricsAddr string
	var enableLeaderElection bool
	var probeAddr string
	pflag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
	pflag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
	pflag.BoolVar(&enableLeaderElection, "leader-elect", false,
		"Enable leader election for controller manager. "+
			"Enabling this will ensure there is only one active controller manager.")
	opts := zap.Options{
		Development: true,
	}
	opts.BindFlags(flag.CommandLine)

	pflag.CommandLine.AddFlagSet(engine.FlagSet())
	pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
	pflag.Parse()

	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))

	c := cron.New()

	operatorNamespace := os.Getenv("OPERATOR_NAMESPACE")
	if operatorNamespace == "" {
		setupLog.Info("missing environment variable OPERATOR_NAMESPACE")
		os.Exit(1)
	}

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:                 scheme,
		MetricsBindAddress:     metricsAddr,
		Port:                   9443,
		HealthProbeBindAddress: probeAddr,
		LeaderElection:         enableLeaderElection,
		LeaderElectionID:       "6fb93904.mittwald.de",
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	if err := mgr.Add(util.NewCronRunnable(c)); err != nil {
		setupLog.Error(err, "unable to register cron runnable")
		os.Exit(1)
	}

	updaterController := controllers.NewUpdaterController(mgr.GetClient(), mgr.GetLogger(), operatorNamespace)
	if err := mgr.Add(updaterController); err != nil {
		setupLog.Error(err, "error while registering updater controller")
		os.Exit(1)
	}

	if err = (&controllers.VirusScanReconciler{
		Client:   mgr.GetClient(),
		Scheme:   mgr.GetScheme(),
		Recorder: mgr.GetEventRecorderFor("kube-av"),
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "VirusScan")
		os.Exit(1)
	}
	if err = (&controllers.ScheduledVirusScanReconciler{
		Client:      mgr.GetClient(),
		Scheme:      mgr.GetScheme(),
		Recorder:    mgr.GetEventRecorderFor("kube-av"),
		Cron:        c,
		CronEntries: make(map[string]controllers.CronEntry),
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "ScheduledVirusScan")
		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)
	}

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