main.go

/*

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"

	egressv1 "github.com/monzo/egress-operator/api/v1"
	"github.com/monzo/egress-operator/controllers"
	"k8s.io/apimachinery/pkg/runtime"
	clientgoscheme "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")

	// see https://github.com/operator-framework/operator-sdk/issues/1813
	leaseDuration = 30 * time.Second
	renewDeadline = 20 * time.Second
)

const namespace = "egress-operator-system"

func init() {
	_ = clientgoscheme.AddToScheme(scheme)

	_ = egressv1.AddToScheme(scheme)
	// +kubebuilder:scaffold:scheme
}

func main() {
	var (
		metricsAddr                string
		enableLeaderElection       bool
		enablePodDisruptionBudgets bool
	)
	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(&enablePodDisruptionBudgets, "enable-pod-disruption-budgets", false,
		"Enable deploying pod disruption budgets for egress gateways.")
	flag.Parse()

	ctrl.SetLogger(zap.New(func(o *zap.Options) {
		o.Development = true
	}))

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:             scheme,
		MetricsBindAddress: metricsAddr,
		LeaderElection:     enableLeaderElection,
		LeaderElectionID:   "egress-operator",
		LeaseDuration:      &leaseDuration,
		RenewDeadline:      &renewDeadline,
		Port:               9443,
		Namespace:          namespace,
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	if err = (&controllers.ExternalServiceReconciler{
		Client:                     mgr.GetClient(),
		Log:                        ctrl.Log.WithName("controllers").WithName("ExternalService"),
		Scheme:                     mgr.GetScheme(),
		EnablePodDisruptionBudgets: enablePodDisruptionBudgets,
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "ExternalService")
		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)
	}
}