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main.go
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/*
* Copyright (c) 2019-Present Pivotal Software, Inc. All rights reserved.
*
* 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"
relocatingwebhook "github.com/pivotal/kubernetes-image-mapper/pkg/webhook"
"os"
"sigs.k8s.io/controller-runtime/pkg/webhook"
"time"
mapperv1alpha1 "github.com/pivotal/kubernetes-image-mapper/api/v1alpha1"
"github.com/pivotal/kubernetes-image-mapper/controllers"
"github.com/pivotal/kubernetes-image-mapper/pkg/unimap"
"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")
)
func init() {
_ = clientgoscheme.AddToScheme(scheme)
_ = mapperv1alpha1.AddToScheme(scheme)
// +kubebuilder:scaffold:scheme
}
const defaultResyncPeriod = time.Hour * 10
func main() {
var metricsAddr string
var enableLeaderElection bool
var debug bool
var resyncPeriod time.Duration
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(&debug, "debug", false, "Enable debug logging.")
flag.DurationVar(&resyncPeriod, "resync-period", defaultResyncPeriod, "The controller resync period.")
flag.Parse()
ctrl.SetLogger(zap.Logger(debug))
setupLog.V(1).Info("debug logging enabled")
setupLog.Info("creating manager")
mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
Scheme: scheme,
MetricsBindAddress: metricsAddr,
LeaderElection: enableLeaderElection,
SyncPeriod: &resyncPeriod,
})
if err != nil {
setupLog.Error(err, "failed to create manager")
os.Exit(1)
}
stopCh := ctrl.SetupSignalHandler()
comp := unimap.New(stopCh)
setupLog.Info("setting up webhook server")
hookServer := mgr.GetWebhookServer()
setupLog.Info("registering webhook to the webhook server")
hookServer.Register("/image-mapper", &webhook.Admission{
Handler: relocatingwebhook.NewLoggingWebhookHandler(relocatingwebhook.NewImageReferenceRelocator(comp), setupLog.WithName("handler"), debug),
})
setupLog.Info("creating controller", "controller", "ImageMap")
if err = (&controllers.ImageMapReconciler{
Client: mgr.GetClient(),
Log: ctrl.Log.WithName("controllers").WithName("ImageMap"),
Map: comp,
}).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "failed to create controller", "controller", "ImageMap")
os.Exit(1)
}
// +kubebuilder:scaffold:builder
setupLog.Info("starting manager")
if err := mgr.Start(stopCh); err != nil {
setupLog.Error(err, "failed to start manager")
os.Exit(1)
}
}