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server.go
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server.go
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package main
import (
"flag"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/klog/v2"
"k8s.io/klog/v2/klogr"
ctrl "sigs.k8s.io/controller-runtime"
ctrlwebhook "sigs.k8s.io/controller-runtime/pkg/webhook"
ovnv1 "github.com/kubeovn/kube-ovn/pkg/apis/kubeovn/v1"
"github.com/kubeovn/kube-ovn/pkg/util"
ovnwebhook "github.com/kubeovn/kube-ovn/pkg/webhook"
"github.com/kubeovn/kube-ovn/versions"
"github.com/spf13/pflag"
)
const (
hookServerCertDir = "/tmp/k8s-webhook-server/serving-certs"
)
var (
scheme = runtime.NewScheme()
)
func init() {
if err := corev1.AddToScheme(scheme); err != nil {
util.LogFatalAndExit(err, "failed to add core v1 scheme")
}
if err := appsv1.AddToScheme(scheme); err != nil {
util.LogFatalAndExit(err, "failed to add apps v1 scheme")
}
if err := ovnv1.AddToScheme(scheme); err != nil {
util.LogFatalAndExit(err, "failed to add ovn v1 scheme")
}
}
func main() {
klog.Infof(versions.String())
port := pflag.Int("port", 8443, "The port webhook listen on.")
klogFlags := flag.NewFlagSet("klog", flag.ExitOnError)
klog.InitFlags(klogFlags)
// Sync the glog and klog flags.
pflag.CommandLine.VisitAll(func(f1 *pflag.Flag) {
f2 := klogFlags.Lookup(f1.Name)
if f2 != nil {
value := f1.Value.String()
if err := f2.Value.Set(value); err != nil {
util.LogFatalAndExit(err, "failed to set flag")
}
}
})
pflag.CommandLine.AddGoFlagSet(klogFlags)
pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
pflag.Parse()
// set logger for controller-runtime framework
ctrl.SetLogger(klogr.New())
// Create a webhook server.
hookServer := &ctrlwebhook.Server{
Port: *port,
CertDir: hookServerCertDir,
}
mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
Scheme: scheme,
// disable metrics to avoid port conflict
MetricsBindAddress: "0",
})
if err != nil {
panic(err)
}
validatingHook, err := ovnwebhook.NewValidatingHook(mgr.GetCache())
if err != nil {
panic(err)
}
klog.Infof("register path /validate-ip")
// Register the webhooks in the server.
hookServer.Register("/validate-ip", &ctrlwebhook.Admission{Handler: validatingHook})
if err := mgr.Add(hookServer); err != nil {
panic(err)
}
// Start the server by starting a previously-set-up manager
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
panic(err)
}
}