main.go

/*
SPDX-FileCopyrightText: 2022 The Kubernetes Authors

SPDX-License-Identifier: Apache-2.0
*/

package main

import (
	"fmt"
	"os"
	"time"

	infrastructurev1beta1 "github.com/outscale/cluster-api-provider-outscale/api/v1beta1"
	"github.com/outscale/cluster-api-provider-outscale/cloud/services"
	"github.com/outscale/cluster-api-provider-outscale/cloud/utils"
	"github.com/outscale/cluster-api-provider-outscale/controllers"
	"github.com/outscale/cluster-api-provider-outscale/util/reconciler"
	"github.com/spf13/pflag"
	"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"
	"k8s.io/component-base/logs"
	v1 "k8s.io/component-base/logs/api/v1"
	_ "k8s.io/component-base/logs/json/register"
	"k8s.io/klog/v2"
	clusterv1 "sigs.k8s.io/cluster-api/api/v1beta1"
	bootstrapv1 "sigs.k8s.io/cluster-api/bootstrap/kubeadm/api/v1beta1"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/cache"
	"sigs.k8s.io/controller-runtime/pkg/controller"
	"sigs.k8s.io/controller-runtime/pkg/metrics/filters"
	"sigs.k8s.io/controller-runtime/pkg/metrics/server"
	//+kubebuilder:scaffold:imports
)

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

func init() {
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(clusterv1.AddToScheme(scheme))
	utilruntime.Must(bootstrapv1.AddToScheme(scheme))
	utilruntime.Must(infrastructurev1beta1.AddToScheme(scheme))
	//+kubebuilder:scaffold:scheme
}

func main() {
	var (
		metricsAddr          string
		enableLeaderElection bool
		probeAddr            string
		watchNamespace       string
		watchFilterValue     string
		syncPeriod           time.Duration
		skipMetadata         bool
		leaseDuration        time.Duration
		renewDeadline        time.Duration
		retryPeriod          time.Duration
		clusterConcurrency   int
		machineConcurrency   int
		reconcileTimeout     time.Duration
	)
	fs := pflag.CommandLine
	fs.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to")
	fs.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to")

	fs.BoolVar(&enableLeaderElection, "leader-elect", true, "Enable leader election for controller manager")
	fs.DurationVar(&leaseDuration, "leader-elect-lease-duration", 15*time.Second,
		"Interval at which non-leader candidates will wait to force acquire leadership")
	fs.DurationVar(&renewDeadline, "leader-elect-renew-deadline", 10*time.Second,
		"Duration that the leading controller manager will retry refreshing leadership before giving up")
	fs.DurationVar(&retryPeriod, "leader-elect-retry-period", 2*time.Second,
		"Duration the LeaderElector clients should wait between tries of actions")

	fs.StringVar(&watchNamespace, "namespace", "",
		"Namespace that the controller watches for cluster-api objects. If unspecified, the controller watches all namespaces.")
	fs.StringVar(&watchFilterValue, "watch-filter", "",
		fmt.Sprintf("Label value that the controller watches to reconcile cluster-api objects. Label key is always %s. If unspecified, the controller watches for all cluster-api objects.", clusterv1.WatchLabel))
	fs.DurationVar(&syncPeriod, "sync-period", 5*time.Minute,
		"The minimum interval at which watched cluster-api objects are reconciled")
	fs.BoolVar(&skipMetadata, "skip-metadata", false, "Skip metadata call")
	fs.DurationVar(&reconcileTimeout, "reconcile-timeout", reconciler.DefaultLoopTimeout,
		"The maximum duration a reconcile loop can run")
	fs.IntVar(&clusterConcurrency, "osccluster-concurrency", 2,
		"Number of OscCluster reconciles to process simultaneously")
	fs.IntVar(&machineConcurrency, "oscmachine-concurrency", 2,
		"Number of OscMachine reconciles to process simultaneously")

	logOptions := logs.NewOptions()
	v1.AddFlags(logOptions, fs)

	pflag.Parse()

	if err := v1.ValidateAndApply(logOptions, nil); err != nil {
		setupLog.Error(err, "unable to validate and apply log options")
		os.Exit(1)
	}
	logger := klog.Background().WithValues("version", utils.GetVersion())
	ctrl.SetLogger(logger)

	var watchNamespaces map[string]cache.Config
	if watchNamespace != "" {
		logger.Info("Watching namespace", "namespace", watchNamespace)
		watchNamespaces = map[string]cache.Config{
			watchNamespace: {},
		}
	}
	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme: scheme,
		Metrics: server.Options{
			BindAddress:    metricsAddr,
			FilterProvider: filters.WithAuthenticationAndAuthorization,
		},
		HealthProbeBindAddress: probeAddr,
		LeaderElection:         enableLeaderElection,
		LeaderElectionID:       "controller-leader-election-capo",
		LeaseDuration:          &leaseDuration,
		RenewDeadline:          &renewDeadline,
		RetryPeriod:            &retryPeriod,
		Cache: cache.Options{
			DefaultNamespaces: watchNamespaces,
			SyncPeriod:        &syncPeriod,
		},
	})
	if err != nil {
		logger.Error(err, "unable to start manager")
		os.Exit(1)
	}

	ctx := ctrl.SetupSignalHandler()

	cs, err := services.NewServices()
	if err != nil {
		logger.Error(err, "unable to initialize cloud services")
		os.Exit(1)
	}
	var meta services.Metadata
	if !skipMetadata {
		meta, err = services.FetchMetadata()
		if err != nil {
			logger.Error(err, "unable to fetch metadata")
		}
	}

	tracker := &controllers.ClusterResourceTracker{
		Cloud: cs,
	}
	if err = (&controllers.OscClusterReconciler{
		Client:           mgr.GetClient(),
		Tracker:          tracker,
		Cloud:            cs,
		Metadata:         meta,
		Recorder:         mgr.GetEventRecorderFor("osccluster-controller"),
		ReconcileTimeout: reconcileTimeout,
		WatchFilterValue: watchFilterValue,
	}).SetupWithManager(ctx, mgr, controller.Options{MaxConcurrentReconciles: clusterConcurrency}); err != nil {
		logger.Error(err, "unable to create controller", "controller", "OscCluster")
		os.Exit(1)
	}

	mtracker := &controllers.MachineResourceTracker{
		Cloud: cs,
	}
	allocator := controllers.NewMultiAZAllocator(mgr.GetClient())

	if err = (&controllers.OscMachineReconciler{
		Client:           mgr.GetClient(),
		ClusterTracker:   tracker,
		Tracker:          mtracker,
		AZAllocator:      allocator,
		Cloud:            cs,
		Recorder:         mgr.GetEventRecorderFor("oscmachine-controller"),
		ReconcileTimeout: reconcileTimeout,
		WatchFilterValue: watchFilterValue,
	}).SetupWithManager(ctx, mgr, controller.Options{MaxConcurrentReconciles: machineConcurrency}); err != nil {
		logger.Error(err, "unable to create controller", "controller", "OscMachine")
		os.Exit(1)
	}

	if err = (&controllers.OscMachineTemplateReconciler{
		Client:           mgr.GetClient(),
		Recorder:         mgr.GetEventRecorderFor("oscmachinetemplate-controller"),
		ReconcileTimeout: reconcileTimeout,
		WatchFilterValue: watchFilterValue,
	}).SetupWithManager(ctx, mgr, controller.Options{}); err != nil {
		logger.Error(err, "unable to create controller", "controller", "OscMachineTemplate")
		os.Exit(1)
	}

	if err = (&infrastructurev1beta1.OscMachine{}).SetupWebhookWithManager(mgr); err != nil {
		logger.Error(err, "unable to create webhook", "webhook", "OscMachine")
		os.Exit(1)
	}
	if err = (&infrastructurev1beta1.OscMachineTemplate{}).SetupWebhookWithManager(mgr); err != nil {
		logger.Error(err, "unable to create webhook", "webhook", "OscMachineTemplate")
		os.Exit(1)
	}
	if err = (&infrastructurev1beta1.OscClusterTemplate{}).SetupWebhookWithManager(mgr); err != nil {
		logger.Error(err, "unable to create webhook", "webhook", "OscClusterTemplate")
		os.Exit(1)
	}
	if err = (&infrastructurev1beta1.OscCluster{}).SetupWebhookWithManager(mgr); err != nil {
		logger.Error(err, "unable to create webhook", "webhook", "OscCluster")
		os.Exit(1)
	}
	//+kubebuilder:scaffold:builder

	if err := mgr.AddHealthzCheck("healthz", mgr.GetWebhookServer().StartedChecker()); err != nil {
		logger.Error(err, "unable to set up health check")
		os.Exit(1)
	}
	if err := mgr.AddReadyzCheck("readyz", mgr.GetWebhookServer().StartedChecker()); err != nil {
		logger.Error(err, "unable to set up ready check")
		os.Exit(1)
	}

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