}

// Name is part of the preflight.Checker interface
func (c *healthCheck) Name() string {
	return c.name
}

// CheckClusterHealth makes sure:
// - the cluster can accept a workload
// - all control-plane Nodes are Ready
// - (if static pod-hosted) that all required Static Pod manifests exist on disk

	return errors.New("not implemented")
}

func DupCloseOnExec(fd int) (int, string, error) {
	nfd, err := syscall.Dup(int(fd), -1)
	if err != nil {
		return 0, "dup", err
	}
	// Plan9 has no syscall.CloseOnExec but
	// its forkAndExecInChild closes all fds
	// not related to the fork+exec.
	return nfd, "", nil

	case "windows":
		return "USERPROFILE"
	case "plan9":
		return "home"
	default:
		return "HOME"
	}
}

// tempEnvName returns the environment variable used by os.TempDir
// to locate the default directory for temporary files.
func tempEnvName() string {
	switch runtime.GOOS {
	case "windows":
		return "TMP"
	case "plan9":
		return "TMPDIR" // actually plan 9 doesn't have one at all but this is fine
	default:

		// "debug/pe/testdata/gcc-amd64-mingw-exec", // no symbols!
		"debug/pe/testdata/gcc-386-mingw-exec",
		"debug/plan9obj/testdata/amd64-plan9-exec",
		"debug/plan9obj/testdata/386-plan9-exec",
		"internal/xcoff/testdata/gcc-ppc64-aix-dwarf2-exec",
	}
	for _, f := range testfiles {
		exepath := filepath.Join(testenv.GOROOT(t), "src", f)
		if strings.HasSuffix(f, ".base64") {

	ifc := &Interface{
		Index: i + 1,                             // Offset the index by one to suit the contract
		Name:  netdir + "/ipifc/" + itoa.Itoa(i), // Name is the full path to the interface path in plan9
	}

	ifcstat := ifc.Name + "/status"
	ifcstatf, err := open(ifcstat)
	if err != nil {
		return nil, err
	}
	defer ifcstatf.close()

	line, ok := ifcstatf.readLine()
	if !ok {

		a.IP = loopbackIP(net)
	case *UDPAddr:
		a.IP = loopbackIP(net)
	case *IPAddr:
		a.IP = loopbackIP(net)
	}
	return a
}

// plan9LocalAddr returns a Plan 9 local address string.
// See setladdrport at https://9p.io/sources/plan9/sys/src/9/ip/devip.c.
func plan9LocalAddr(addr Addr) string {
	var ip IP
	port := 0
	switch a := addr.(type) {
	case *TCPAddr:
		if a != nil {
			ip = a.IP

	# Prepares the machine for serving a control plane
	kubeadm join phase control-plane-prepare all
`)

// NewControlPlanePreparePhase creates a kubeadm workflow phase that implements the preparation of the node to serve a control plane
func NewControlPlanePreparePhase() workflow.Phase {
	return workflow.Phase{
		Name:    "control-plane-prepare",
		Short:   "Prepare the machine for serving a control plane",
		Example: controlPlanePrepareExample,

```Python hl_lines="13  15  22  25"
{!../../../docs_src/background_tasks/tutorial002.py!}
```

Neste exemplo, as mensagens serão gravadas no arquivo `log.txt` _após_ o envio da resposta.

Se houver uma consulta na solicitação, ela será gravada no log em uma tarefa em segundo plano.

func NewControlPlaneJoinPhase() workflow.Phase {
	return workflow.Phase{
		Name:    "control-plane-join",
		Short:   "Join a machine as a control plane instance",
		Example: controlPlaneJoinExample,
		Phases: []workflow.Phase{
			{
				Name:           "all",
				Short:          "Join a machine as a control plane instance",

		data, ok := c.(Data)
		if !ok {
			return errors.New("control-plane phase invoked with an invalid data struct")
		}

		// if this is not a control-plane node, this phase should not be executed
		if !data.IsControlPlaneNode() {
			fmt.Println("[upgrade] Skipping phase. Not a control plane node.")
			return nil
		}

		// otherwise, retrieve all the info required for control plane upgrade
		cfg := data.InitCfg()
		client := data.Client()