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step_shutdown.go
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/
step_shutdown.go
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package common
import (
"context"
"errors"
"fmt"
"log"
"time"
"github.com/hashicorp/packer/helper/multistep"
"github.com/hashicorp/packer/packer"
)
// This step shuts down the machine. It first attempts to do so gracefully,
// but ultimately forcefully shuts it down if that fails.
//
// Uses:
// communicator packer.Communicator
// driver Driver
// ui packer.Ui
// vmName string
//
// Produces:
// <nothing>
type StepShutdown struct {
Command string
Timeout time.Duration
Delay time.Duration
}
func (s *StepShutdown) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
comm := state.Get("communicator").(packer.Communicator)
driver := state.Get("driver").(Driver)
ui := state.Get("ui").(packer.Ui)
vmName := state.Get("vmName").(string)
if s.Command != "" {
ui.Say("Gracefully halting virtual machine...")
log.Printf("Executing shutdown command: %s", s.Command)
cmd := &packer.RemoteCmd{Command: s.Command}
if err := cmd.StartWithUi(comm, ui); err != nil {
err := fmt.Errorf("Failed to send shutdown command: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
// Wait for the machine to actually shut down
log.Printf("Waiting max %s for shutdown to complete", s.Timeout)
shutdownTimer := time.After(s.Timeout)
for {
running, _ := driver.IsRunning(vmName)
if !running {
if s.Delay.Nanoseconds() > 0 {
log.Printf("Delay for %s after shutdown to allow locks to clear...", s.Delay)
time.Sleep(s.Delay)
}
break
}
select {
case <-shutdownTimer:
err := errors.New("Timeout while waiting for machine to shut down.")
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
default:
time.Sleep(500 * time.Millisecond)
}
}
} else {
ui.Say("Halting the virtual machine...")
if err := driver.Stop(vmName); err != nil {
err := fmt.Errorf("Error stopping VM: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
}
log.Println("VM shut down.")
return multistep.ActionContinue
}
func (s *StepShutdown) Cleanup(state multistep.StateBag) {}