github.phpd.cn/hashicorp/packer@v1.3.2/builder/parallels/common/step_shutdown.go (about)

     1  package common
     2  
     3  import (
     4  	"bytes"
     5  	"context"
     6  	"errors"
     7  	"fmt"
     8  	"log"
     9  	"time"
    10  
    11  	"github.com/hashicorp/packer/helper/multistep"
    12  	"github.com/hashicorp/packer/packer"
    13  )
    14  
    15  // StepShutdown is a step that shuts down the machine. It first attempts to do
    16  // so gracefully, but ultimately forcefully shuts it down if that fails.
    17  //
    18  // Uses:
    19  //   communicator packer.Communicator
    20  //   driver Driver
    21  //   ui     packer.Ui
    22  //   vmName string
    23  //
    24  // Produces:
    25  //   <nothing>
    26  type StepShutdown struct {
    27  	Command string
    28  	Timeout time.Duration
    29  }
    30  
    31  // Run shuts down the VM.
    32  func (s *StepShutdown) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
    33  	comm := state.Get("communicator").(packer.Communicator)
    34  	driver := state.Get("driver").(Driver)
    35  	ui := state.Get("ui").(packer.Ui)
    36  	vmName := state.Get("vmName").(string)
    37  
    38  	if s.Command != "" {
    39  		ui.Say("Gracefully halting virtual machine...")
    40  		log.Printf("Executing shutdown command: %s", s.Command)
    41  
    42  		var stdout, stderr bytes.Buffer
    43  		cmd := &packer.RemoteCmd{
    44  			Command: s.Command,
    45  			Stdout:  &stdout,
    46  			Stderr:  &stderr,
    47  		}
    48  		if err := comm.Start(cmd); err != nil {
    49  			err := fmt.Errorf("Failed to send shutdown command: %s", err)
    50  			state.Put("error", err)
    51  			ui.Error(err.Error())
    52  			return multistep.ActionHalt
    53  		}
    54  
    55  		// Wait for the machine to actually shut down
    56  		log.Printf("Waiting max %s for shutdown to complete", s.Timeout)
    57  		shutdownTimer := time.After(s.Timeout)
    58  		for {
    59  			running, _ := driver.IsRunning(vmName)
    60  			if !running {
    61  				break
    62  			}
    63  
    64  			select {
    65  			case <-shutdownTimer:
    66  				log.Printf("Shutdown stdout: %s", stdout.String())
    67  				log.Printf("Shutdown stderr: %s", stderr.String())
    68  				err := errors.New("Timeout while waiting for machine to shut down.")
    69  				state.Put("error", err)
    70  				ui.Error(err.Error())
    71  				return multistep.ActionHalt
    72  			default:
    73  				time.Sleep(500 * time.Millisecond)
    74  			}
    75  		}
    76  	} else {
    77  		ui.Say("Halting the virtual machine...")
    78  		if err := driver.Stop(vmName); err != nil {
    79  			err = fmt.Errorf("Error stopping VM: %s", err)
    80  			state.Put("error", err)
    81  			ui.Error(err.Error())
    82  			return multistep.ActionHalt
    83  		}
    84  	}
    85  
    86  	log.Println("VM shut down.")
    87  	return multistep.ActionContinue
    88  }
    89  
    90  // Cleanup does nothing.
    91  func (s *StepShutdown) Cleanup(state multistep.StateBag) {}