main.go

/*

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"
	"os"
	"strconv"

	certmanager "github.com/jetstack/cert-manager/pkg/apis/certmanager/v1alpha2"
	adcsv1 "github.com/nokia/adcs-issuer/api/v1"
	batchv1 "github.com/nokia/adcs-issuer/api/v1"
	"github.com/nokia/adcs-issuer/controllers"
	"github.com/nokia/adcs-issuer/healthcheck"
	"github.com/nokia/adcs-issuer/issuers"
	"k8s.io/apimachinery/pkg/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
	"k8s.io/klog"
	"k8s.io/utils/clock"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"
	// +kubebuilder:scaffold:imports
)

const (
	defaultWebhooksPort int = 9443
)

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

func init() {
	_ = clientgoscheme.AddToScheme(scheme)
	_ = certmanager.AddToScheme(scheme)
	_ = adcsv1.AddToScheme(scheme)
	_ = batchv1.AddToScheme(scheme)
	// +kubebuilder:scaffold:scheme
}

func main() {
	// prevent logging into file by glog
	flag.Set("logtostderr", "true")
	// prevent logging into file by klog
	klog.SetOutput(os.Stdout)

	var metricsAddr string
	var healthcheckAddr string
	var webhooksPort string
	var enableLeaderElection bool
	var clusterResourceNamespace string
	var disableApprovedCheck bool
	flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
	flag.StringVar(&healthcheckAddr, "healthcheck-addr", ":8081", "The address the healthcheck endpoints binds to.")
	flag.StringVar(&webhooksPort, "webhooks-port", strconv.Itoa(defaultWebhooksPort), "Port for webhooks requests.")
	flag.BoolVar(&disableApprovedCheck, "disable-approved-check", false,
		"Disables waiting for CertificateRequests to have an approved condition before signing.")

	port, err := strconv.Atoi(webhooksPort)
	if err != nil {
		setupLog.Error(err, "invalid webhooks port. Using default.")
		port = defaultWebhooksPort
	}
	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.StringVar(&clusterResourceNamespace, "cluster-resource-namespace", "kube-system", "Namespace where cluster-level resources are stored.")

	// Options for configuring logging
	opts := zap.Options{}
	opts.BindFlags(flag.CommandLine)

	flag.Parse()

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

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

	mgr.AddHealthzCheck("healthz", healthcheck.HealthCheck)
	mgr.AddReadyzCheck("readyz", healthcheck.HealthCheck)
	certificateRequestReconciler := &controllers.CertificateRequestReconciler{
		Client:   mgr.GetClient(),
		Log:      ctrl.Log.WithName("controllers").WithName("CertificateRequest"),
		Recorder: mgr.GetEventRecorderFor("adcs-certificaterequests-controller"),

		Clock:                  clock.RealClock{},
		CheckApprovedCondition: !disableApprovedCheck,
	}
	if err = (certificateRequestReconciler).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "CertificateRequest")
		os.Exit(1)
	}

	if err = (&controllers.AdcsRequestReconciler{
		Client: mgr.GetClient(),
		Log:    ctrl.Log.WithName("controllers").WithName("AdcsRequest"),
		IssuerFactory: issuers.IssuerFactory{
			Client:                   mgr.GetClient(),
			Log:                      ctrl.Log.WithName("factories").WithName("AdcsIssuer"),
			ClusterResourceNamespace: clusterResourceNamespace,
		},
		Recorder:                     mgr.GetEventRecorderFor("adcs-requests-controller"),
		CertificateRequestController: certificateRequestReconciler,
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "AdcsRequest")
		os.Exit(1)
	}

	if err = (&controllers.AdcsIssuerReconciler{
		Client: mgr.GetClient(),
		Log:    ctrl.Log.WithName("controllers").WithName("AdcsIssuer"),
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "AdcsIssuer")
		os.Exit(1)
	}

	if err = (&adcsv1.AdcsIssuer{}).SetupWebhookWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create webhook", "webhook", "AdcsIssuer")
		os.Exit(1)
	}

	if err = (&controllers.ClusterAdcsIssuerReconciler{
		Client: mgr.GetClient(),
		Log:    ctrl.Log.WithName("controllers").WithName("ClusterAdcsIssuer"),
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "ClusterAdcsIssuer")
		os.Exit(1)
	}

	if err = (&batchv1.ClusterAdcsIssuer{}).SetupWebhookWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create webhook", "webhook", "ClusterAdcsIssuer")
		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)
	}
}