github.com/rahart/packer@v0.12.2-0.20161229105310-282bb6ad370f/builder/parallels/common/step_shutdown.go (about)

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