main.go

//
// Copyright 2022 IBM Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

package main

import (
	"flag"
	"fmt"
	"io/ioutil"
	"os"
	r "runtime"

	monitoringv1 "github.com/coreos/prometheus-operator/pkg/apis/monitoring/v1"
	operatoribmcomv1alpha1 "github.com/ibm/ibm-licensing-operator/api/v1alpha1"
	"github.com/ibm/ibm-licensing-operator/controllers"
	"github.com/ibm/ibm-licensing-operator/version"
	servicecav1 "github.com/openshift/api/operator/v1"
	routev1 "github.com/openshift/api/route/v1"
	meterdefv1beta1 "github.com/redhat-marketplace/redhat-marketplace-operator/v2/apis/marketplace/v1beta1"
	appsv1 "k8s.io/api/apps/v1"
	corev1 "k8s.io/api/core/v1"
	networkingv1 "k8s.io/api/networking/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/runtime/schema"
	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/log/zap"

	cache "github.com/IBM/controller-filtered-cache/filteredcache"
	odlm "github.com/IBM/operand-deployment-lifecycle-manager/api/v1alpha1"

	operatorv1 "github.com/ibm/ibm-licensing-operator/api/v1"
	// +kubebuilder:scaffold:imports
)

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

func printVersion() {
	setupLog.Info(fmt.Sprintf("Operator Version: %s", version.Version))
	setupLog.Info(fmt.Sprintf("Operator BuildDate: %s", readFile("/IMAGE_BUILDDATE")))
	setupLog.Info(fmt.Sprintf("Operator Commit: %s", readFile("/IMAGE_RELEASE")))
	setupLog.Info(fmt.Sprintf("Go Version: %s", r.Version()))
	setupLog.Info(fmt.Sprintf("Go OS/Arch: %s/%s", r.GOOS, r.GOARCH))
}

func readFile(filename string) string {
	content, err := ioutil.ReadFile(filename)
	if err != nil {
		setupLog.Info(fmt.Sprintf("Can not read: %s", filename))
		return ""
	}

	return string(content)[:len(string(content))-1]
}

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

	utilruntime.Must(operatoribmcomv1alpha1.AddToScheme(scheme))

	utilruntime.Must(routev1.AddToScheme(scheme))

	utilruntime.Must(servicecav1.AddToScheme(scheme))

	utilruntime.Must(monitoringv1.AddToScheme(scheme))

	utilruntime.Must(networkingv1.AddToScheme(scheme))

	utilruntime.Must(meterdefv1beta1.AddToScheme(scheme))

	utilruntime.Must(odlm.AddToScheme(scheme))

	utilruntime.Must(operatorv1.AddToScheme(scheme))
	// +kubebuilder:scaffold:scheme
}

// getWatchNamespace returns the Namespace the operator should be watching for changes
func getWatchNamespace() (string, error) {
	// 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.
	var watchNamespaceEnvVar = "WATCH_NAMESPACE"

	ns, found := os.LookupEnv(watchNamespaceEnvVar)
	if !found {
		return "", fmt.Errorf("%s must be set", watchNamespaceEnvVar)
	}
	return ns, nil
}

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()

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

	printVersion()

	watchNamespace, err := getWatchNamespace()
	if err != nil {
		setupLog.Error(err, "unable to get WATCH_NAMESPACE, "+
			"the manager will watch and manage resources in all namespaces")
	}

	gvkLabelMap := map[schema.GroupVersionKind]cache.Selector{
		corev1.SchemeGroupVersion.WithKind("Secret"): {
			LabelSelector: "release in (ibm-license-service-reporter, ibm-licensing-service)",
		},
		appsv1.SchemeGroupVersion.WithKind("Deployment"): {
			LabelSelector: "release in (ibm-license-service-reporter, ibm-licensing-service)",
		},
		corev1.SchemeGroupVersion.WithKind("Pod"): {
			LabelSelector: "release in (ibm-license-service-reporter, ibm-licensing-service)",
		},
	}

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:             scheme,
		MetricsBindAddress: metricsAddr,
		Port:               9443,
		LeaderElection:     enableLeaderElection,
		LeaderElectionID:   "e1f51baf.ibm.com",
		Namespace:          watchNamespace,
		NewCache:           cache.NewFilteredCacheBuilder(gvkLabelMap),
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	if err = (&controllers.IBMLicensingReconciler{
		Client:            mgr.GetClient(),
		Reader:            mgr.GetAPIReader(),
		Log:               ctrl.Log.WithName("controllers").WithName("IBMLicensing"),
		Scheme:            mgr.GetScheme(),
		OperatorNamespace: watchNamespace,
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "IBMLicensing")
		os.Exit(1)
	}
	if err = (&controllers.IBMLicenseServiceReporterReconciler{
		Client: mgr.GetClient(),
		Reader: mgr.GetAPIReader(),
		Log:    ctrl.Log.WithName("controllers").WithName("IBMLicenseServiceReporter"),
		Scheme: mgr.GetScheme(),
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "IBMLicenseServiceReporter")
		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)
	}
}