istio.io/istio@v0.0.0-20240520182934-d79c90f27776/cni/cmd/install-cni/main.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package main
    16  
    17  import (
    18  	"context"
    19  	"os"
    20  	"os/signal"
    21  	"syscall"
    22  
    23  	"istio.io/istio/cni/pkg/cmd"
    24  	"istio.io/istio/pkg/log"
    25  )
    26  
    27  func main() {
    28  	// Create context that cancels on termination signal
    29  	ctx, cancel := context.WithCancel(context.Background())
    30  	sigChan := make(chan os.Signal, 1)
    31  	signal.Notify(sigChan, os.Interrupt, syscall.SIGTERM)
    32  	go func(sigChan chan os.Signal, cancel context.CancelFunc) {
    33  		sig := <-sigChan
    34  		log.Infof("Exit signal received: %s", sig)
    35  		cancel()
    36  	}(sigChan, cancel)
    37  
    38  	rootCmd := cmd.GetCommand()
    39  	if err := rootCmd.ExecuteContext(ctx); err != nil {
    40  		os.Exit(1)
    41  	}
    42  }