iofog-operator/main.go at develop · eclipse-iofog/iofog-operator · GitHub

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package main

import (
	"flag"
	"os"

	cpv3 "github.com/eclipse-iofog/iofog-operator/v3/apis/controlplanes/v3"
	controlplanescontroller "github.com/eclipse-iofog/iofog-operator/v3/controllers/controlplanes"
	"k8s.io/apimachinery/pkg/runtime"
	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/cache"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"
	"sigs.k8s.io/controller-runtime/pkg/manager"
	"sigs.k8s.io/controller-runtime/pkg/metrics/server"
	// +kubebuilder:scaffold:imports
)

var scheme = runtime.NewScheme() //nolint:gochecknoglobals

func init() { //nolint:gochecknoinits
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))

	utilruntime.Must(cpv3.AddToScheme(scheme))
	// +kubebuilder:scaffold:scheme
} //nolint:wsl

// getWatchNamespace returns the Namespace the operator should be watching for changes.
func getWatchNamespace() string {
	// WatchNamespaceEnvVar is the constant for env variable WATCH_NAMESPACE
	// which specifies the Namespace to watch.
	// An empty value means the operator is running with cluster scope.
	ns, _ := os.LookupEnv("WATCH_NAMESPACE")

	return ns
}

func main() {
	setupLog := ctrl.Log.WithName("setup")

	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()

	ctrl.SetLogger(zap.New(zap.UseDevMode(true)))

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), manager.Options{
		Scheme:           scheme,
		LeaderElection:   enableLeaderElection,
		LeaderElectionID: "iofog.operator",
		Metrics:          server.Options{BindAddress: metricsAddr},
		Cache: cache.Options{
			DefaultNamespaces: map[string]cache.Config{
				getWatchNamespace(): {},
			},
		},
		// WebhookServer:    wb.NewServer(webhook.Options{Port: 9443}),
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	if err = (&controlplanescontroller.ControlPlaneReconciler{
		Client: mgr.GetClient(),
		Log:    ctrl.Log.WithName("controllers").WithName("ControlPlane"),
		Scheme: mgr.GetScheme(),
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "ControlPlane")
		os.Exit(1)
	}
	// +kubebuilder:scaffold:builder

	setupLog.Info("starting manager")

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