patchwork/main.go at main · andreasgerner/patchwork · GitHub

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// Package main is the entry point for the patchwork controller.
package main

import (
	"flag"
	"fmt"
	"os"

	_ "k8s.io/client-go/plugin/pkg/client/auth"

	"k8s.io/apimachinery/pkg/runtime"
	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/healthz"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"
	metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"

	patchworkv1 "github.com/andreasgerner/patchwork/api/v1"
	"github.com/andreasgerner/patchwork/internal/controller"
	"github.com/andreasgerner/patchwork/pkg/version"
)

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

func init() {
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(patchworkv1.AddToScheme(scheme))
}

func main() {
	var metricsAddr string
	var probeAddr string
	var leaderElect bool
	var development bool
	var showVersion bool

	flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metrics endpoint binds to. Use 0 to disable.")
	flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
	flag.BoolVar(&leaderElect, "leader-elect", false, "Enable leader election for high availability.")
	flag.BoolVar(&development, "development", false, "Enable development mode (human-readable logs, DPanic panics).")
	flag.BoolVar(&showVersion, "version", false, "Print version and exit.")

	var opts zap.Options
	opts.BindFlags(flag.CommandLine)
	flag.Parse()

	if showVersion {
		fmt.Println(version.Banner())
		os.Exit(0)
	}

	opts.Development = development
	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))

	setupLog.Info(version.Banner())

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme: scheme,
		Metrics: metricsserver.Options{
			BindAddress: metricsAddr,
		},
		HealthProbeBindAddress: probeAddr,
		LeaderElection:         leaderElect,
		LeaderElectionID:       "patchwork.patchwork.io",
	})
	if err != nil {
		setupLog.Error(err, "unable to create manager")
		os.Exit(1)
	}

	if err := (&controller.PatchRuleReconciler{
		Client:   mgr.GetClient(),
		Scheme:   mgr.GetScheme(),
		Recorder: mgr.GetEventRecorderFor("patchwork"),
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "PatchRule")
		os.Exit(1)
	}

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