main.go

package main

import (
	"context"
	"flag"
	"os"
	"strings"
	"time"

	// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
	"github.com/galleybytes/terraform-operator/pkg/apis"
	"github.com/galleybytes/terraform-operator/pkg/controllers"
	localcache "github.com/patrickmn/go-cache"
	"go.uber.org/zap/zapcore"
	corev1 "k8s.io/api/core/v1"
	"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"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/client"
	"sigs.k8s.io/controller-runtime/pkg/healthz"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"
)

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

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

func main() {
	var metricsAddr string
	var enableLeaderElection bool
	var probeAddr string
	var maxConcurrentReconciles int
	var disableReconciler bool
	var inheritNodeSelector bool
	var inheritAffinty bool
	var inheritTolerations bool
	var requireApprovalImage string

	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(&disableReconciler, "disable-reconciler", false, "Set to true to disable the reconcile loop controller)")
	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", 1, "The max number of concurrent Reconciles for the controller")
	flag.BoolVar(&inheritNodeSelector, "inherit-node-selector", false, "Use the controller's nodeSelector for every task created by the controller")
	flag.BoolVar(&inheritAffinty, "inherit-affinity", false, "Use the controller's affinity rules for every task created by the controller")
	flag.BoolVar(&inheritTolerations, "inherit-tolerations", false, "Use the controller's tolerations for every task created by the controller")
	flag.StringVar(&requireApprovalImage, "require-approval-image", "ghcr.io/galleybytes/require-approval:0.2.0", "Plugin image for require-approval")
	opts := zap.Options{
		Development: true,
		Level:       zapcore.DebugLevel,
	}
	opts.BindFlags(flag.CommandLine)
	flag.Parse()

	globalEnvFromConfigmapData := make(map[string]string)
	globalEnvFromSecretData := make(map[string][]byte)
	for _, env := range os.Environ() {
		key := strings.Split(env, "=")[0]
		if strings.HasPrefix(key, "TFO_VAR_") {

			globalEnvFromConfigmapData[strings.TrimPrefix(key, "TFO_VAR_")] = os.Getenv(key)

		}
		if strings.HasPrefix(key, "TFO_SECRET_") {
			globalEnvFromSecretData[strings.TrimPrefix(key, "TFO_SECRET_")] = []byte(os.Getenv(key))
		}
	}

	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
	c := localcache.New(60*time.Second, 3600*time.Second)

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:                 scheme,
		MetricsBindAddress:     metricsAddr,
		Port:                   9443,
		HealthProbeBindAddress: probeAddr,
		LeaderElection:         enableLeaderElection,
		LeaderElectionID:       "050c8fba.galleybytes.com",
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	if !disableReconciler {
		if err = (&controllers.ReconcileTerraform{
			Client:                     mgr.GetClient(),
			Log:                        ctrl.Log.WithName("terraform_controller"),
			Recorder:                   mgr.GetEventRecorderFor("terraform-controller"),
			Scheme:                     mgr.GetScheme(),
			MaxConcurrentReconciles:    maxConcurrentReconciles,
			Cache:                      c,
			GlobalEnvFromConfigmapData: globalEnvFromConfigmapData,
			GlobalEnvFromSecretData:    globalEnvFromSecretData,
			GlobalEnvSuffix:            "global-envs",
			InheritAffinity:            inheritAffinty,
			AffinityCacheKey:           "inherited_affinity",
			InheritNodeSelector:        inheritNodeSelector,
			NodeSelectorCacheKey:       "inherited_nodeselector",
			InheritTolerations:         inheritTolerations,
			TolerationsCacheKey:        "inherited_tolerations",
			RequireApprovalImage:       requireApprovalImage,
		}).SetupWithManager(mgr); err != nil {
			setupLog.Error(err, "unable to create controller", "controller", "Cluster")
			os.Exit(1)
		}
	}
	// +kubebuilder:scaffold:builder
	cache := mgr.GetCache()
	if err := cache.IndexField(context.TODO(), &corev1.Pod{}, "metadata.generateName", func(obj client.Object) []string {
		return []string{obj.(*corev1.Pod).ObjectMeta.GenerateName}
	}); err != nil {
		panic(err)
	}

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

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