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main.go
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main.go
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/*
Copyright 2022 The KubeZoo 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.
*/
package main
import (
"flag"
"os"
// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
// to ensure that exec-entrypoint and run can make use of them.
scheme "k8s.io/client-go/kubernetes/scheme"
_ "k8s.io/client-go/plugin/pkg/client/auth"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/envtest"
"sigs.k8s.io/controller-runtime/pkg/healthz"
"sigs.k8s.io/controller-runtime/pkg/log/zap"
"github.com/kubewharf/kubezoo/pkg/clusterresourcequota/controllers"
//+kubebuilder:scaffold:imports
)
var (
setupLog = ctrl.Log.WithName("setup")
)
func main() {
var metricsAddr string
var enableLeaderElection bool
var probeAddr string
var webhookPort int
var webhookCertDir 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.")
flag.IntVar(&webhookPort, "webhook-port", 6443, "Port is the port that the webhook server serves at.")
flag.StringVar(&webhookCertDir, "webhook-cert-dir", "",
"CertDir is the directory that contains the server key and certificate."+
"If not set, webhook server would look up the server key and certificate in {TempDir}/k8s-webhook-server/serving-certs."+
"The server key and certificate must be named tls.key and tls.crt, respectively.",
)
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.Scheme,
MetricsBindAddress: metricsAddr,
Port: webhookPort,
CertDir: webhookCertDir,
HealthProbeBindAddress: probeAddr,
LeaderElection: enableLeaderElection,
LeaderElectionID: "clusterresourcequota.quota.kubezoo.io",
// LeaderElectionReleaseOnCancel defines if the leader should step down voluntarily
// when the Manager ends. This requires the binary to immediately end when the
// Manager is stopped, otherwise, this setting is unsafe. Setting this significantly
// speeds up voluntary leader transitions as the new leader don't have to wait
// LeaseDuration time first.
//
// In the default scaffold provided, the program ends immediately after
// the manager stops, so would be fine to enable this option. However,
// if you are doing or is intended to do any operation such as perform cleanups
// after the manager stops then its usage might be unsafe.
// LeaderElectionReleaseOnCancel: true,
})
if err != nil {
setupLog.Error(err, "unable to start manager")
os.Exit(1)
}
_, err = envtest.InstallCRDs(mgr.GetConfig(), envtest.CRDInstallOptions{
CRDs: NewV1CustomResourceDefinitions(),
})
if err != nil {
setupLog.Error(err, "unable to install crds")
os.Exit(1)
}
if err = (&controllers.ClusterResourceQuotaReconciler{
Client: mgr.GetClient(),
Scheme: mgr.GetScheme(),
Cache: mgr.GetCache(),
APIReader: mgr.GetAPIReader(),
Logger: mgr.GetLogger(),
}).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "ClusterResourceQuota")
os.Exit(1)
}
//+kubebuilder:scaffold:builder
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)
}
}