support for driver specific pid files

Signed-off-by: Balaji Vijayakumar <[email protected]>

Author: balajiv113

cmd/limactl/stop.go

@@ -104,9 +104,9 @@ func waitForHostAgentTermination(ctx context.Context, inst *store.Instance, begi
 }
 
 func stopInstanceForcibly(inst *store.Instance) {
-	if inst.QemuPID > 0 {
-		logrus.Infof("Sending SIGKILL to the %s driver process %d", inst.VMType, inst.QemuPID)
-		if err := osutil.SysKill(inst.QemuPID, osutil.SigKill); err != nil {
+	if inst.DriverPID > 0 {
+		logrus.Infof("Sending SIGKILL to the %s driver process %d", inst.VMType, inst.DriverPID)
+		if err := osutil.SysKill(inst.DriverPID, osutil.SigKill); err != nil {
 			logrus.Error(err)
 		}
 	} else {

docs/internal.md

@@ -48,6 +48,7 @@ QEMU:
 - `serial.sock`: QEMU serial socket, for debugging (Usage: `socat -,echo=0,icanon=0 unix-connect:serial.sock`)
 
 VZ:
+- `vz.pid`: VZ PID
 - `vz-identifier`: Unique machine identifier file for a VM
 - `vz-efi`: EFIVariable store file for a VM
 

pkg/qemu/qemu.go

@@ -622,7 +622,7 @@ func Cmdline(cfg Config) (string, []string, error) {
 
 	// QEMU process
 	args = append(args, "-name", "lima-"+cfg.Name)
-	args = append(args, "-pidfile", filepath.Join(cfg.InstanceDir, filenames.QemuPID))
+	args = append(args, "-pidfile", filepath.Join(cfg.InstanceDir, filenames.PIDFile(*y.VMType)))
 
 	return exe, args, nil
 }

pkg/qemu/qemu_driver.go

@@ -142,7 +142,7 @@ func (l *LimaQemuDriver) killQEMU(_ context.Context, _ time.Duration, qCmd *exec
 	}
 	qWaitErr := <-qWaitCh
 	logrus.WithError(qWaitErr).Info("QEMU has exited, after killing forcibly")
-	qemuPIDPath := filepath.Join(l.Instance.Dir, filenames.QemuPID)
+	qemuPIDPath := filepath.Join(l.Instance.Dir, filenames.PIDFile(*l.Yaml.VMType))
 	_ = os.RemoveAll(qemuPIDPath)
 	return qWaitErr
 }

pkg/store/filenames/filenames.go

@@ -33,7 +33,6 @@ const (
 	Kernel             = "kernel"
 	KernelCmdline      = "kernel.cmdline"
 	Initrd             = "initrd"
-	QemuPID            = "qemu.pid"
 	QMPSock            = "qmp.sock"
 	SerialLog          = "serial.log"
 	SerialSock         = "serial.sock"
@@ -66,3 +65,7 @@ const (
 // ssh appends 16 bytes of random characters when it first creates the socket:
 // https://github.com/openssh/openssh-portable/blob/V_8_7_P1/mux.c#L1271-L1285
 const LongestSock = SSHSock + ".1234567890123456"
+
+func PIDFile(name string) string {
+	return name + ".pid"
+}

pkg/store/instance.go

@@ -44,7 +44,7 @@ type Instance struct {
 	Networks        []limayaml.Network `json:"network,omitempty"`
 	SSHLocalPort    int                `json:"sshLocalPort,omitempty"`
 	HostAgentPID    int                `json:"hostAgentPID,omitempty"`
-	QemuPID         int                `json:"qemuPID,omitempty"`
+	DriverPID       int                `json:"driverPID,omitempty"`
 	Errors          []error            `json:"errors,omitempty"`
 }
 
@@ -121,19 +121,19 @@ func Inspect(instName string) (*Instance, error) {
 		}
 	}
 
-	inst.QemuPID, err = ReadPIDFile(filepath.Join(instDir, filenames.QemuPID))
+	inst.DriverPID, err = ReadPIDFile(filepath.Join(instDir, filenames.PIDFile(*y.VMType)))
 	if err != nil {
 		inst.Status = StatusBroken
 		inst.Errors = append(inst.Errors, err)
 	}
 
 	if inst.Status == StatusUnknown {
-		if inst.HostAgentPID > 0 && inst.QemuPID > 0 {
+		if inst.HostAgentPID > 0 && inst.DriverPID > 0 {
 			inst.Status = StatusRunning
-		} else if inst.HostAgentPID == 0 && inst.QemuPID == 0 {
+		} else if inst.HostAgentPID == 0 && inst.DriverPID == 0 {
 			inst.Status = StatusStopped
-		} else if inst.HostAgentPID > 0 && inst.QemuPID == 0 {
-			inst.Errors = append(inst.Errors, errors.New("host agent is running but qemu is not"))
+		} else if inst.HostAgentPID > 0 && inst.DriverPID == 0 {
+			inst.Errors = append(inst.Errors, errors.New("host agent is running but driver is not"))
 			inst.Status = StatusBroken
 		} else {
 			inst.Errors = append(inst.Errors, fmt.Errorf("%s driver is running but host agent is not", inst.VMType))

pkg/vz/vm_darwin.go

@@ -64,7 +64,7 @@ func startVM(ctx context.Context, driver *driver.BaseDriver) (*vz.VirtualMachine
 			case newState := <-machine.StateChangedNotify():
 				switch newState {
 				case vz.VirtualMachineStateRunning:
-					pidFile := filepath.Join(driver.Instance.Dir, filenames.QemuPID)
+					pidFile := filepath.Join(driver.Instance.Dir, filenames.PIDFile(*driver.Yaml.VMType))
 					if _, err := os.Stat(pidFile); !errors.Is(err, os.ErrNotExist) {
 						logrus.Errorf("pidfile %q already exists", pidFile)
 						errCh <- err