main.go

// Copyright (c) 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file

//
// 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"

	druidv1alpha1 "github.com/gardener/etcd-druid/api/v1alpha1"
	"github.com/gardener/etcd-druid/controllers"

	"k8s.io/apimachinery/pkg/runtime"
	schemev1 "k8s.io/client-go/kubernetes/scheme"
	_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"
	// +kubebuilder:scaffold:imports
)

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

func init() {
	schemev1.AddToScheme(scheme)
	druidv1alpha1.AddToScheme(scheme)

	// +kubebuilder:scaffold:scheme
}

func main() {
	var (
		metricsAddr               string
		enableLeaderElection      bool
		workers                   int
		ignoreOperationAnnotation bool
	)

	flag.IntVar(&workers, "workers", 3, "Number of worker threads.")
	flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
	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.BoolVar(&ignoreOperationAnnotation, "ignore-operation-annotation", true, "Ignore the operation annotation or not.")

	flag.Parse()

	ctrl.SetLogger(zap.Logger(true))

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

	ec, err := controllers.NewEtcdReconcilerWithImageVector(mgr)
	if err != nil {
		setupLog.Error(err, "unable to initialize controller with image vector")
		os.Exit(1)
	}
	err = ec.SetupWithManager(mgr, workers, ignoreOperationAnnotation)
	if err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "Etcd")
		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)
	}
}