Introduce 'Starting' status for machines

- The State() function now returns machine.Starting status instead of an
  empty string if the VM is in the process of starting.

- The `CheckExclusiveActiveVM()` function returns `true` to prevent
  starting a VM while another is in the process of starting.

- `podman machine ls` displays "Currently starting" under "Last Up" for
  the starting VM

- `podman machine ls` supports `{{.Starting}}` boolean field in the format

- `podman machine inspect` displays "starting" in the "State" field for
  the starting VM

Signed-off-by: Shane Smith <shane.smith@shopify.com>

cmd/podman/machine/list.go

@@ -48,6 +48,7 @@ type ListReporter struct {
 	Default        bool
 	Created        string
 	Running        bool
+	Starting       bool
 	LastUp         string
 	Stream         string
 	VMType         string
@@ -224,10 +225,14 @@ func toHumanFormat(vms []*machine.ListResponse) ([]*ListReporter, error) {
 		} else {
 			response.Name = vm.Name
 		}
-		if vm.Running {
+		switch {
+		case vm.Running:
 			response.LastUp = "Currently running"
 			response.Running = true
-		} else {
+		case vm.Starting:
+			response.LastUp = "Currently starting"
+			response.Starting = true
+		default:
 			response.LastUp = units.HumanDuration(time.Since(vm.LastUp)) + " ago"
 		}
 		response.Created = units.HumanDuration(time.Since(vm.CreatedAt)) + " ago"

cmd/podman/machine/start.go

@@ -56,7 +56,7 @@ func start(_ *cobra.Command, args []string) error {
 		if vmName == activeName {
 			return errors.Wrapf(machine.ErrVMAlreadyRunning, "cannot start VM %s", vmName)
 		}
-		return errors.Wrapf(machine.ErrMultipleActiveVM, "cannot start VM %s. VM %s is currently running", vmName, activeName)
+		return errors.Wrapf(machine.ErrMultipleActiveVM, "cannot start VM %s. VM %s is currently running or starting", vmName, activeName)
 	}
 	fmt.Printf("Starting machine %q\n", vmName)
 	if err := vm.Start(vmName, machine.StartOptions{}); err != nil {

pkg/machine/config.go

@@ -42,7 +42,9 @@ const (
 	// Running indicates the qemu vm is running.
 	Running Status = "running"
 	// Stopped indicates the vm has stopped.
-	Stopped            Status = "stopped"
+	Stopped Status = "stopped"
+	// Starting indicated the vm is in the process of starting
+	Starting           Status = "starting"
 	DefaultMachineName string = "podman-machine-default"
 )
 
@@ -62,7 +64,7 @@ var (
 	DefaultIgnitionUserName                      = "core"
 	ErrNoSuchVM                                  = errors.New("VM does not exist")
 	ErrVMAlreadyExists                           = errors.New("VM already exists")
-	ErrVMAlreadyRunning                          = errors.New("VM already running")
+	ErrVMAlreadyRunning                          = errors.New("VM already running or starting")
 	ErrMultipleActiveVM                          = errors.New("only one VM can be active at a time")
 	ForwarderBinaryName                          = "gvproxy"
 )
@@ -88,6 +90,7 @@ type ListResponse struct {
 	CreatedAt      time.Time
 	LastUp         time.Time
 	Running        bool
+	Starting       bool
 	Stream         string
 	VMType         string
 	CPUs           uint64

pkg/machine/qemu/machine.go

@@ -480,10 +480,6 @@ func (v *MachineVM) Start(name string, _ machine.StartOptions) error {
 		wait           = time.Millisecond * 500
 	)
 
-	if v.Starting {
-		return fmt.Errorf("machine %q is already in the process of being started", v.Name)
-	}
-
 	v.Starting = true
 	if err := v.writeConfig(); err != nil {
 		return fmt.Errorf("writing JSON file: %w", err)
@@ -908,7 +904,7 @@ func (v *MachineVM) State(bypass bool) (machine.Status, error) {
 	}
 	// Check if we can dial it
 	if v.Starting && !bypass {
-		return "", nil
+		return machine.Starting, nil
 	}
 	monitor, err := qmp.NewSocketMonitor(v.QMPMonitor.Network, v.QMPMonitor.Address.GetPath(), v.QMPMonitor.Timeout)
 	if err != nil {
@@ -1079,8 +1075,11 @@ func getVMInfos() ([]*machine.ListResponse, error) {
 					return err
 				}
 			}
-			if state == machine.Running {
+			switch state {
+			case machine.Running:
 				listEntry.Running = true
+			case machine.Starting:
+				listEntry.Starting = true
 			}
 
 			listed = append(listed, listEntry)
@@ -1113,7 +1112,7 @@ func (p *Provider) CheckExclusiveActiveVM() (bool, string, error) {
 		return false, "", errors.Wrap(err, "error checking VM active")
 	}
 	for _, vm := range vms {
-		if vm.Running {
+		if vm.Running || vm.Starting {
 			return true, vm.Name, nil
 		}
 	}

pkg/machine/wsl/machine.go

@@ -1312,6 +1312,7 @@ func GetVMInfos() ([]*machine.ListResponse, error) {
 			listEntry.RemoteUsername = vm.RemoteUsername
 			listEntry.Port = vm.Port
 			listEntry.IdentityPath = vm.IdentityPath
+			listEntry.Starting = false
 
 			running := vm.isRunning()
 			listEntry.CreatedAt, listEntry.LastUp, _ = vm.updateTimeStamps(running)