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main.go
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main.go
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// Copyright 2019-2021 The Liqo 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 (
"context"
"flag"
"os/signal"
"syscall"
"time"
"k8s.io/klog/v2"
"github.com/liqotech/liqo/pkg/mutate"
)
const gracefulPeriod = 5 * time.Second
func main() {
klog.InitFlags(nil)
flag.Parse()
config := &mutate.MutationConfig{}
setOptions(config)
klog.Info("Starting server ...")
ctx, cancel := context.WithCancel(context.Background())
ctxSignal, stop := signal.NotifyContext(ctx, syscall.SIGINT, syscall.SIGTERM)
s, err := mutate.NewMutationServer(ctx, config)
if err != nil {
klog.Fatal(err)
}
go func() {
defer cancel()
<-ctxSignal.Done()
// Restore default signal handler.
stop()
ctxShutdown, cancelShutdown := context.WithTimeout(ctx, gracefulPeriod)
defer cancelShutdown()
klog.Info("Received signal, shutting down")
s.Shutdown(ctxShutdown)
}()
s.Serve()
<-ctx.Done()
klog.Info("Liqo webhook cleanly shutdown")
}