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package qemu
import (
"context"
"errors"
"fmt"
"log"
"time"
"github.com/hashicorp/packer/packer-plugin-sdk/communicator"
"github.com/hashicorp/packer/packer-plugin-sdk/multistep"
packersdk "github.com/hashicorp/packer/packer-plugin-sdk/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 packersdk.Communicator
// config *config
// driver Driver
// ui packersdk.Ui
//
// Produces:
// <nothing>
type stepShutdown struct {
ShutdownCommand string
ShutdownTimeout time.Duration
Comm *communicator.Config
}
func (s *stepShutdown) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
driver := state.Get("driver").(Driver)
ui := state.Get("ui").(packersdk.Ui)
if s.Comm.Type == "none" {
cancelCh := make(chan struct{}, 1)
go func() {
defer close(cancelCh)
<-time.After(s.ShutdownTimeout)
}()
ui.Say("Waiting for shutdown...")
if ok := driver.WaitForShutdown(cancelCh); ok {
log.Println("VM shut down.")
return multistep.ActionContinue
} else {
err := fmt.Errorf("Failed to shutdown")
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
}
if s.ShutdownCommand != "" {
comm := state.Get("communicator").(packersdk.Communicator)
ui.Say("Gracefully halting virtual machine...")
log.Printf("Executing shutdown command: %s", s.ShutdownCommand)
cmd := &packersdk.RemoteCmd{Command: s.ShutdownCommand}
if err := cmd.RunWithUi(ctx, 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
}
// Start the goroutine that will time out our graceful attempt
cancelCh := make(chan struct{}, 1)
go func() {
defer close(cancelCh)
<-time.After(s.ShutdownTimeout)
}()
log.Printf("Waiting max %s for shutdown to complete", s.ShutdownTimeout)
if ok := driver.WaitForShutdown(cancelCh); !ok {
err := errors.New("Timeout while waiting for machine to shut down.")
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
} else {
ui.Say("Halting the virtual machine...")
if err := driver.Stop(); 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) {}
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