92 lines
2.3 KiB
Go
92 lines
2.3 KiB
Go
package common
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"log"
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"time"
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"github.com/hashicorp/packer-plugin-sdk/multistep"
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packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
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)
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// StepShutdown is a step that shuts down the machine. It first attempts to do
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// so gracefully, but ultimately forcefully shuts it down if that fails.
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//
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// Uses:
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// communicator packersdk.Communicator
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// driver Driver
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// ui packersdk.Ui
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// vmName string
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//
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// Produces:
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// <nothing>
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type StepShutdown struct {
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Command string
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Timeout time.Duration
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}
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// Run shuts down the VM.
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func (s *StepShutdown) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
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comm := state.Get("communicator").(packersdk.Communicator)
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driver := state.Get("driver").(Driver)
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ui := state.Get("ui").(packersdk.Ui)
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vmName := state.Get("vmName").(string)
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if s.Command != "" {
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ui.Say("Gracefully halting virtual machine...")
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log.Printf("Executing shutdown command: %s", s.Command)
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var stdout, stderr bytes.Buffer
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cmd := &packersdk.RemoteCmd{
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Command: s.Command,
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Stdout: &stdout,
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Stderr: &stderr,
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}
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if err := comm.Start(ctx, cmd); err != nil {
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err := fmt.Errorf("Failed to send shutdown command: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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// Wait for the machine to actually shut down
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log.Printf("Waiting max %s for shutdown to complete", s.Timeout)
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shutdownTimer := time.After(s.Timeout)
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for {
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running, _ := driver.IsRunning(vmName)
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if !running {
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break
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}
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select {
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case <-shutdownTimer:
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log.Printf("Shutdown stdout: %s", stdout.String())
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log.Printf("Shutdown stderr: %s", stderr.String())
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err := errors.New("Timeout while waiting for machine to shut down.")
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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default:
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time.Sleep(500 * time.Millisecond)
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}
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}
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} else {
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ui.Say("Halting the virtual machine...")
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if err := driver.Stop(vmName); err != nil {
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err = fmt.Errorf("Error stopping VM: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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}
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log.Println("VM shut down.")
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return multistep.ActionContinue
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}
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// Cleanup does nothing.
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func (s *StepShutdown) Cleanup(state multistep.StateBag) {}
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