145 lines
3.6 KiB
Go
145 lines
3.6 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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"regexp"
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"strings"
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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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// This step shuts down the machine. It first attempts to do so gracefully,
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// 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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// dir OutputDir
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// driver Driver
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// ui packersdk.Ui
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// vmx_path 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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// Set this to true if we're testing
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Testing bool
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}
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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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dir := state.Get("dir").(OutputDir)
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driver := state.Get("driver").(Driver)
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ui := state.Get("ui").(packersdk.Ui)
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vmxPath := state.Get("vmx_path").(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(vmxPath)
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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(150 * time.Millisecond)
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}
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}
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} else {
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ui.Say("Forcibly halting virtual machine...")
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if err := driver.Stop(vmxPath); 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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ui.Message("Waiting for VMware to clean up after itself...")
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lockRegex := regexp.MustCompile(`(?i)\.lck$`)
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timer := time.After(120 * time.Second)
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LockWaitLoop:
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for {
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files, err := dir.ListFiles()
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if err != nil {
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log.Printf("Error listing files in outputdir: %s", err)
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} else {
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var locks []string
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for _, file := range files {
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if lockRegex.MatchString(file) {
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locks = append(locks, file)
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}
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}
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if len(locks) == 0 {
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log.Println("No more lock files found. VMware is clean.")
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break
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}
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if len(locks) == 1 && strings.HasSuffix(locks[0], ".vmx.lck") {
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log.Println("Only waiting on VMX lock. VMware is clean.")
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break
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}
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log.Printf("Waiting on lock files: %#v", locks)
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}
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select {
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case <-timer:
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log.Println("Reached timeout on waiting for clean VMware. Assuming clean.")
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break LockWaitLoop
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case <-time.After(150 * time.Millisecond):
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}
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}
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if !s.Testing {
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// Windows takes a while to yield control of the files when the
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// process is exiting. Ubuntu and OS X will yield control of the files
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// but VMWare may overwrite the VMX cleanup steps that run after this,
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// so we wait to ensure VMWare has exited and flushed the VMX.
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// We just sleep here. In the future, it'd be nice to find a better
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// solution to this.
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time.Sleep(5 * time.Second)
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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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func (s *StepShutdown) Cleanup(state multistep.StateBag) {}
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