packer-cn/builder/vmware/common/step_shutdown.go

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package common
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import (
"bytes"
"context"
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"errors"
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"fmt"
"log"
"regexp"
"strings"
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"time"
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"github.com/hashicorp/packer/helper/multistep"
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"github.com/hashicorp/packer/packer"
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)
// 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
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// dir OutputDir
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// driver Driver
// ui packer.Ui
// vmx_path string
//
// Produces:
// <nothing>
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type StepShutdown struct {
Command string
Timeout time.Duration
// Set this to true if we're testing
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").(packer.Communicator)
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dir := state.Get("dir").(OutputDir)
driver := state.Get("driver").(Driver)
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ui := state.Get("ui").(packer.Ui)
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)
var stdout, stderr bytes.Buffer
cmd := &packer.RemoteCmd{
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Command: s.Command,
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Stdout: &stdout,
Stderr: &stderr,
}
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
}
// Wait for the machine to actually shut down
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log.Printf("Waiting max %s for shutdown to complete", s.Timeout)
shutdownTimer := time.After(s.Timeout)
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for {
running, _ := driver.IsRunning(vmxPath)
if !running {
break
}
select {
case <-shutdownTimer:
log.Printf("Shutdown stdout: %s", stdout.String())
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
default:
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time.Sleep(150 * time.Millisecond)
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}
}
} else {
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
}
}
ui.Message("Waiting for VMware to clean up after itself...")
lockRegex := regexp.MustCompile(`(?i)\.lck$`)
timer := time.After(120 * time.Second)
LockWaitLoop:
for {
files, err := dir.ListFiles()
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if err != nil {
log.Printf("Error listing files in outputdir: %s", err)
} else {
var locks []string
for _, file := range files {
if lockRegex.MatchString(file) {
locks = append(locks, file)
}
}
if len(locks) == 0 {
log.Println("No more lock files found. VMware is clean.")
break
}
if len(locks) == 1 && strings.HasSuffix(locks[0], ".vmx.lck") {
log.Println("Only waiting on VMX lock. VMware is clean.")
break
}
log.Printf("Waiting on lock files: %#v", locks)
}
select {
case <-timer:
log.Println("Reached timeout on waiting for clean VMware. Assuming clean.")
break LockWaitLoop
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case <-time.After(150 * time.Millisecond):
}
}
if !s.Testing {
// Windows takes a while to yield control of the files when the
// process is exiting. Ubuntu and OS X will yield control of the files
// but VMWare may overwrite the VMX cleanup steps that run after this,
// so we wait to ensure VMWare has exited and flushed the VMX.
// We just sleep here. In the future, it'd be nice to find a better
// solution to this.
time.Sleep(5 * time.Second)
}
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log.Println("VM shut down.")
return multistep.ActionContinue
}
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func (s *StepShutdown) Cleanup(state multistep.StateBag) {}