main.go

/*
Copyright 2022 Nutanix

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"
	"time"

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

	"go.uber.org/zap/zapcore"
	"k8s.io/apimachinery/pkg/runtime"
	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
	"k8s.io/client-go/informers"
	"k8s.io/client-go/kubernetes"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	_ "k8s.io/client-go/plugin/pkg/client/auth"
	"k8s.io/client-go/tools/cache"
	capiv1 "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/healthz"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"

	infrav1alpha4 "github.com/nutanix-cloud-native/cluster-api-provider-nutanix/api/v1alpha4"
	infrav1beta1 "github.com/nutanix-cloud-native/cluster-api-provider-nutanix/api/v1beta1"
	"github.com/nutanix-cloud-native/cluster-api-provider-nutanix/controllers"
	//+kubebuilder:scaffold:imports
)

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

// gitCommitHash is the git commit hash of the code that is running.
var gitCommitHash string

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

	utilruntime.Must(capiv1.AddToScheme(scheme))

	utilruntime.Must(bootstrapv1.AddToScheme(scheme))

	utilruntime.Must(infrav1alpha4.AddToScheme(scheme))
	utilruntime.Must(infrav1beta1.AddToScheme(scheme))

	//+kubebuilder:scaffold:scheme
}

const (
	// DefaultMaxConcurrentReconciles is the default maximum number of concurrent reconciles
	defaultMaxConcurrentReconciles = 10
)

func main() {
	var (
		metricsAddr             string
		enableLeaderElection    bool
		probeAddr               string
		maxConcurrentReconciles int
	)

	flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
	flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
	flag.BoolVar(&enableLeaderElection, "leader-elect", false,
		"Enable leader election for controller manager. "+
			"Enabling this will ensure there is only one active controller manager.")
	flag.IntVar(
		&maxConcurrentReconciles,
		"max-concurrent-reconciles",
		defaultMaxConcurrentReconciles,
		"The maximum number of allowed, concurrent reconciles.")

	opts := zap.Options{
		TimeEncoder: zapcore.RFC3339TimeEncoder,
	}
	opts.BindFlags(flag.CommandLine)
	flag.Parse()

	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
	setupLog.Info("Initializing Nutanix Cluster API Infrastructure Provider", "Git Hash", gitCommitHash)

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:                 scheme,
		MetricsBindAddress:     metricsAddr,
		Port:                   9443,
		HealthProbeBindAddress: probeAddr,
		LeaderElection:         enableLeaderElection,
		LeaderElectionID:       "f265110d.cluster.x-k8s.io",
	})
	if err != nil {
		setupLog.Error(err, "unable to create manager")
		os.Exit(1)
	}

	// Set up the context that's going to be used in controllers and for the manager.
	ctx := ctrl.SetupSignalHandler()

	// Create a secret informer for the Nutanix client
	clientset, err := kubernetes.NewForConfig(mgr.GetConfig())
	if err != nil {
		setupLog.Error(err, "unable to create clientset for management cluster")
		os.Exit(1)
	}

	informerFactory := informers.NewSharedInformerFactory(clientset, time.Minute)
	secretInformer := informerFactory.Core().V1().Secrets()
	informer := secretInformer.Informer()
	go informer.Run(ctx.Done())
	cache.WaitForCacheSync(ctx.Done(), informer.HasSynced)

	configMapInformer := informerFactory.Core().V1().ConfigMaps()
	cmInformer := configMapInformer.Informer()
	go cmInformer.Run(ctx.Done())
	cache.WaitForCacheSync(ctx.Done(), cmInformer.HasSynced)

	clusterCtrl, err := controllers.NewNutanixClusterReconciler(mgr.GetClient(),
		secretInformer,
		configMapInformer,
		mgr.GetScheme(),
		controllers.WithMaxConcurrentReconciles(maxConcurrentReconciles),
	)
	if err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "NutanixCluster")
		os.Exit(1)
	}

	if err = clusterCtrl.SetupWithManager(ctx, mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "NutanixCluster")
		os.Exit(1)
	}
	machineCtrl, err := controllers.NewNutanixMachineReconciler(
		mgr.GetClient(),
		secretInformer,
		configMapInformer,
		mgr.GetScheme(),
		controllers.WithMaxConcurrentReconciles(maxConcurrentReconciles),
	)
	if err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "NutanixMachine")
		os.Exit(1)
	}
	if err = machineCtrl.SetupWithManager(ctx, mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "NutanixMachine")
		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 CAPX Controller Manager")
	if err := mgr.Start(ctx); err != nil {
		setupLog.Error(err, "problem running manager")
		os.Exit(1)
	}
}