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main.go
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main.go
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/*
Copyright 2020 The Kubernetes authors.
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.
*/
// +kubebuilder:docs-gen:collapse=Apache License
package main
import (
"flag"
"os"
kbatchv1 "k8s.io/api/batch/v1"
"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"
batchv1 "tutorial.kubebuilder.io/project/api/v1"
batchv2 "tutorial.kubebuilder.io/project/api/v2"
"tutorial.kubebuilder.io/project/controllers"
//+kubebuilder:scaffold:imports
)
// +kubebuilder:docs-gen:collapse=Imports
/*
*/
var (
scheme = runtime.NewScheme()
setupLog = ctrl.Log.WithName("setup")
)
func init() {
utilruntime.Must(clientgoscheme.AddToScheme(scheme))
utilruntime.Must(kbatchv1.AddToScheme(scheme)) // we've added this ourselves
utilruntime.Must(batchv1.AddToScheme(scheme))
utilruntime.Must(batchv2.AddToScheme(scheme))
//+kubebuilder:scaffold:scheme
}
// +kubebuilder:docs-gen:collapse=existing setup
/*
*/
func main() {
/*
*/
var metricsAddr string
var enableLeaderElection bool
var probeAddr 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(&enableLeaderElection, "leader-elect", false,
"Enable leader election for controller manager. "+
"Enabling this will ensure there is only one active controller manager.")
opts := zap.Options{
Development: true,
}
opts.BindFlags(flag.CommandLine)
flag.Parse()
ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
Scheme: scheme,
MetricsBindAddress: metricsAddr,
Port: 9443,
HealthProbeBindAddress: probeAddr,
LeaderElection: enableLeaderElection,
LeaderElectionID: "80807133.tutorial.kubebuilder.io",
})
if err != nil {
setupLog.Error(err, "unable to start manager")
os.Exit(1)
}
if err = (&controllers.CronJobReconciler{
Client: mgr.GetClient(),
Log: ctrl.Log.WithName("controllers").WithName("CronJob"),
Scheme: mgr.GetScheme(),
}).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "CronJob")
os.Exit(1)
}
// +kubebuilder:docs-gen:collapse=existing setup
/*
Our existing call to SetupWebhookWithManager registers our conversion webhooks with the manager, too.
*/
if os.Getenv("ENABLE_WEBHOOKS") != "false" {
if err = (&batchv1.CronJob{}).SetupWebhookWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create webhook", "webhook", "CronJob")
os.Exit(1)
}
if err = (&batchv2.CronJob{}).SetupWebhookWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create webhook", "webhook", "CronJob")
os.Exit(1)
}
}
//+kubebuilder:scaffold:builder
/*
*/
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)
}
// +kubebuilder:docs-gen:collapse=existing setup
}