github.com/mmcquillan/packer@v1.1.1-0.20171009221028-c85cf0483a5d/builder/parallels/common/step_shutdown.go (about)

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