Golang glog.Warning函數代碼示例

func (daemon *Daemon) CmdTty(job *engine.Job) (err error) {
	if len(job.Args) < 3 {
		return nil
	}
	var (
		podID     = job.Args[0]
		tag       = job.Args[1]
		h         = job.Args[2]
		w         = job.Args[3]
		container string
		vmid      string
	)

	if strings.Contains(podID, "pod-") {
		container = ""
		vmid, err = daemon.GetPodVmByName(podID)
		if err != nil {
			return err
		}
	} else if strings.Contains(podID, "vm-") {
		vmid = podID
	} else {
		container = podID
		podID, err = daemon.GetPodByContainer(container)
		if err != nil {
			return err
		}
		vmid, err = daemon.GetPodVmByName(podID)
		if err != nil {
			return err
		}
	}

	row, err := strconv.Atoi(h)
	if err != nil {
		glog.Warning("Success to resize the tty!")
	}
	column, err := strconv.Atoi(w)
	if err != nil {
		glog.Warning("Success to resize the tty!")
	}
	var ttySizeCommand = &qemu.WindowSizeCommand{
		ClientTag: tag,
		Size:      &qemu.WindowSize{Row: uint16(row), Column: uint16(column)},
	}

	qemuEvent, _, _, err := daemon.GetQemuChan(vmid)
	if err != nil {
		return err
	}
	qemuEvent.(chan qemu.QemuEvent) <- ttySizeCommand
	glog.V(1).Infof("Success to resize the tty!")
	return nil
}

func watchDog(ctx *VmContext) {
	for {
		msg, ok := <-ctx.wdt
		if ok {
			switch msg {
			case "quit":
				glog.V(1).Info("quit watch dog.")
				return
			case "kill":
				success := false
				if ctx.process != nil {
					glog.V(0).Infof("kill Qemu... %d", ctx.process.Pid)
					if err := ctx.process.Kill(); err == nil {
						success = true
					}
				} else {
					glog.Warning("no process to be killed")
				}
				ctx.hub <- &QemuKilledEvent{success: success}
				return
			}
		} else {
			glog.V(1).Info("chan closed, quit watch dog.")
			break
		}
	}
}

func watchDog(qc *QemuContext, hub chan hypervisor.VmEvent) {
	wdt := qc.wdt
	for {
		msg, ok := <-wdt
		if ok {
			switch msg {
			case "quit":
				glog.V(1).Info("quit watch dog.")
				return
			case "kill":
				success := false
				if qc.process != nil {
					glog.V(0).Infof("kill Qemu... %d", qc.process.Pid)
					if err := qc.process.Kill(); err == nil {
						success = true
					}
				} else {
					glog.Warning("no process to be killed")
				}
				hub <- &hypervisor.VmKilledEvent{Success: success}
				return
			}
		} else {
			glog.V(1).Info("chan closed, quit watch dog.")
			break
		}
	}
}

func stateDestroying(ctx *VmContext, ev QemuEvent) {
	if processed, _ := deviceRemoveHandler(ctx, ev); processed {
		if closed := ctx.tryClose(); closed {
			glog.Info("resources reclaimed, quit...")
		}
	} else {
		switch ev.Event() {
		case EVENT_QMP_EVENT:
			if ev.(*QmpEvent).Type == QMP_EVENT_SHUTDOWN {
				glog.Info("Got QMP shutdown event")
				ctx.unsetTimeout()
				if closed := ctx.onQemuExit(false); closed {
					glog.Info("VM Context closed.")
				}
			}
		case EVENT_QEMU_KILL:
			glog.Info("Got Qemu force killed message")
			ctx.unsetTimeout()
			if closed := ctx.onQemuExit(true); closed {
				glog.Info("VM Context closed.")
			}
		case ERROR_INTERRUPTED:
			glog.V(1).Info("Connection interrupted while destroying")
		case COMMAND_RELEASE:
			glog.Info("vm destroying, got release")
			ctx.reportVmShutdown()
		case EVENT_QEMU_TIMEOUT:
			glog.Info("Device removing timeout")
			ctx.Close()
		default:
			glog.Warning("got event during vm cleaning up")
		}
	}
}

func stateCleaning(ctx *VmContext, ev QemuEvent) {
	if processed := commonStateHandler(ctx, ev, false); processed {
	} else if processed, success := deviceRemoveHandler(ctx, ev); processed {
		if !success {
			glog.Warning("fail to unplug devices for stop")
			ctx.poweroffVM(true, "fail to unplug devices")
			ctx.Become(stateDestroying, "DESTROYING")
		} else if ctx.deviceReady() {
			//            ctx.reset()
			//            ctx.unsetTimeout()
			//            ctx.reportPodStopped()
			//            glog.V(1).Info("device ready, could run pod.")
			//            ctx.Become(stateInit, "INIT")
			ctx.vm <- &DecodedMessage{
				code:    INIT_READY,
				message: []byte{},
			}
			glog.V(1).Info("device ready, could run pod.")
		}
	} else if processed := initFailureHandler(ctx, ev); processed {
		ctx.poweroffVM(true, "fail to unplug devices")
		ctx.Become(stateDestroying, "DESTROYING")
	} else {
		switch ev.Event() {
		case COMMAND_RELEASE:
			glog.Info("vm cleaning to idle, got release, quit")
			ctx.reportVmShutdown()
			ctx.Become(stateDestroying, "DESTROYING")
		case EVENT_QEMU_TIMEOUT:
			glog.Warning("Qemu did not exit in time, try to stop it")
			ctx.poweroffVM(true, "pod stopp/unplug timeout")
			ctx.Become(stateDestroying, "DESTROYING")
		case COMMAND_ACK:
			ack := ev.(*CommandAck)
			glog.V(1).Infof("[cleaning] Got reply to %d: '%s'", ack.reply, string(ack.msg))
			if ack.reply == INIT_READY {
				ctx.reset()
				ctx.unsetTimeout()
				ctx.reportPodStopped()
				glog.Info("init has been acknowledged, could run pod.")
				ctx.Become(stateInit, "INIT")
			}
		default:
			glog.V(1).Info("got event message while cleaning")
		}
	}
}

func ReleaseInterface(index int, ipAddr string, file *os.File, callback chan QemuEvent) {
	success := true
	err := network.Release(ipAddr, file)
	if err != nil {
		glog.Warning("Unable to release network interface, address: ", ipAddr)
		success = false
	}
	callback <- &InterfaceReleased{Index: index, Success: success}
}

func stateTerminating(ctx *VmContext, ev QemuEvent) {
	switch ev.Event() {
	case EVENT_QMP_EVENT:
		if ev.(*QmpEvent).Type == QMP_EVENT_SHUTDOWN {
			glog.Info("Got QMP shutdown event while terminating, go to cleaning up")
			ctx.unsetTimeout()
			if closed := ctx.onQemuExit(true); !closed {
				ctx.Become(stateDestroying, "DESTROYING")
			}
		}
	case EVENT_QEMU_KILL:
		glog.Info("Got Qemu force killed message, go to cleaning up")
		ctx.unsetTimeout()
		if closed := ctx.onQemuExit(true); !closed {
			ctx.Become(stateDestroying, "DESTROYING")
		}
	case COMMAND_RELEASE:
		glog.Info("vm terminating, got release")
		ctx.reportVmShutdown()
	case COMMAND_ACK:
		ack := ev.(*CommandAck)
		glog.V(1).Infof("[Terminating] Got reply to %d: '%s'", ack.reply, string(ack.msg))
		if ack.reply == INIT_DESTROYPOD {
			glog.Info("POD destroyed ", string(ack.msg))
			ctx.poweroffVM(false, "")
		}
	case ERROR_CMD_FAIL:
		ack := ev.(*CommandError)
		if ack.context.code == INIT_DESTROYPOD {
			glog.Warning("Destroy pod failed")
			ctx.poweroffVM(true, "Destroy pod failed")
		}
	case EVENT_QEMU_TIMEOUT:
		glog.Warning("Qemu did not exit in time, try to stop it")
		ctx.poweroffVM(true, "vm terminating timeout")
	case ERROR_INTERRUPTED:
		glog.V(1).Info("Connection interrupted while terminating")
	default:
		glog.V(1).Info("got event during terminating")
	}
}

// reportVmShutdown() send report to daemon, notify about that:
//    1. Vm has been shutdown
func (ctx *VmContext) reportVmShutdown() {
	defer func() {
		err := recover()
		if err != nil {
			glog.Warning("panic during send shutdown message to channel")
		}
	}()
	ctx.client <- &types.QemuResponse{
		VmId:  ctx.Id,
		Code:  types.E_VM_SHUTDOWN,
		Cause: "qemu shut down",
	}
}

func qmpCommander(handler chan QmpInteraction, conn *net.UnixConn, session *QmpSession, feedback chan QmpInteraction) {
	glog.V(1).Info("Begin process command session")
	for _, cmd := range session.commands {
		msg, err := json.Marshal(*cmd)
		if err != nil {
			handler <- qmpFail("cannot marshal command", session.callback)
			return
		}

		success := false
		var qe *QmpError = nil
		for repeat := 0; !success && repeat < 3; repeat++ {

			if len(cmd.Scm) > 0 {
				glog.V(1).Infof("send cmd with scm (%d bytes) (%d) %s", len(cmd.Scm), repeat+1, string(msg))
				f, _ := conn.File()
				fd := f.Fd()
				syscall.Sendmsg(int(fd), msg, cmd.Scm, nil, 0)
			} else {
				glog.V(1).Infof("sending command (%d) %s", repeat+1, string(msg))
				conn.Write(msg)
			}

			res, ok := <-feedback
			if !ok {
				glog.Info("QMP command result chan closed")
				return
			}
			switch res.MessageType() {
			case QMP_RESULT:
				success = true
				break
			//success
			case QMP_ERROR:
				glog.Warning("got one qmp error")
				qe = res.(*QmpError)
				time.Sleep(1000 * time.Millisecond)
			case QMP_INTERNAL_ERROR:
				glog.Info("QMP quit... commander quit... ")
				return
			}
		}

		if !success {
			handler <- qe.Finish(session.callback)
			return
		}
	}
	handler <- session.Finish()
	return
}

func (daemon *Daemon) Restore() error {
	if daemon.GetPodNum() == 0 {
		return nil
	}

	podList := map[string]string{}

	iter := daemon.db.NewIterator(util.BytesPrefix([]byte("pod-")), nil)
	for iter.Next() {
		key := iter.Key()
		value := iter.Value()
		if strings.Contains(string(key), "pod-container-") {
			glog.V(1).Infof(string(value))
			continue
		}
		glog.V(1).Infof("Get the pod item, pod is %s!", key)
		err := daemon.db.Delete(key, nil)
		if err != nil {
			return err
		}
		podList[string(key)[4:]] = string(value)
	}
	iter.Release()
	err := iter.Error()
	if err != nil {
		return err
	}
	for k, v := range podList {
		wg := new(sync.WaitGroup)
		err = daemon.CreatePod(v, k, wg)
		if err != nil {
			glog.Warning("Got a unexpected error, %s", err.Error())
			continue
		}
		vmId, err := daemon.GetVmByPod(k)
		if err != nil {
			glog.V(1).Info(err.Error(), " for ", k)
			continue
		}
		daemon.podList[k].Vm = string(vmId)
	}

	// associate all VMs
	daemon.AssociateAllVms()
	return nil
}

func stateRunning(ctx *VmContext, ev QemuEvent) {
	if processed := commonStateHandler(ctx, ev, true); processed {
	} else if processed := initFailureHandler(ctx, ev); processed {
		ctx.shutdownVM(true, "Fail during reconnect to a running pod")
		ctx.Become(stateTerminating, "TERMINATING")
	} else {
		switch ev.Event() {
		case COMMAND_STOP_POD:
			ctx.stopPod()
			ctx.Become(statePodStopping, "STOPPING")
		case COMMAND_RELEASE:
			glog.Info("pod is running, got release command, let qemu fly")
			ctx.Become(nil, "NONE")
			ctx.reportSuccess("", nil)
		case COMMAND_EXEC:
			ctx.execCmd(ev.(*ExecCommand))
		case COMMAND_ATTACH:
			ctx.attachCmd(ev.(*AttachCommand))
		case COMMAND_WINDOWSIZE:
			cmd := ev.(*WindowSizeCommand)
			if ctx.userSpec.Tty {
				ctx.setWindowSize(cmd.ClientTag, cmd.Size)
			}
		case EVENT_POD_FINISH:
			result := ev.(*PodFinished)
			ctx.reportPodFinished(result)
			ctx.shutdownVM(false, "")
			ctx.Become(stateTerminating, "TERMINATING")
		case COMMAND_ACK:
			ack := ev.(*CommandAck)
			glog.V(1).Infof("[running] got init ack to %d", ack.reply)
		case ERROR_CMD_FAIL:
			ack := ev.(*CommandError)
			if ack.context.code == INIT_EXECCMD {
				cmd := ExecCommand{}
				json.Unmarshal(ack.context.message, &cmd)
				ctx.ptys.Close(ctx, cmd.Sequence)
				glog.V(0).Infof("Exec command %s on session %d failed", cmd.Command[0], cmd.Sequence)
			}
		default:
			glog.Warning("got unexpected event during pod running")
		}
	}
}

func statePodStopping(ctx *VmContext, ev QemuEvent) {
	if processed := commonStateHandler(ctx, ev, true); processed {
	} else {
		switch ev.Event() {
		case COMMAND_RELEASE:
			glog.Info("pod stopping, got release, quit.")
			ctx.unsetTimeout()
			ctx.shutdownVM(false, "got release, quit")
			ctx.Become(stateTerminating, "TERMINATING")
			ctx.reportVmShutdown()
		case COMMAND_ACK:
			ack := ev.(*CommandAck)
			glog.V(1).Infof("[Stopping] got init ack to %d", ack.reply)
			if ack.reply == INIT_STOPPOD {
				glog.Info("POD stopped ", string(ack.msg))
				ctx.detatchDevice()
				ctx.Become(stateCleaning, "CLEANING")
			}
		case ERROR_CMD_FAIL:
			ack := ev.(*CommandError)
			if ack.context.code == INIT_STOPPOD {
				ctx.unsetTimeout()
				ctx.shutdownVM(true, "Stop pod failed as init report")
				ctx.Become(stateTerminating, "TERMINATING")
				glog.Error("Stop pod failed as init report")
			}
		case EVENT_QEMU_TIMEOUT:
			reason := "stopping POD timeout"
			ctx.shutdownVM(true, reason)
			ctx.Become(stateTerminating, "TERMINATING")
			glog.Error(reason)
		default:
			glog.Warning("got unexpected event during pod stopping")
		}
	}
}

func stateInit(ctx *VmContext, ev QemuEvent) {
	if processed := commonStateHandler(ctx, ev, false); processed {
		//processed by common
	} else if processed := initFailureHandler(ctx, ev); processed {
		ctx.shutdownVM(true, "Fail during init environment")
		ctx.Become(stateDestroying, "DESTROYING")
	} else {
		switch ev.Event() {
		case EVENT_QEMU_EXIT:
			glog.Error("Qemu did not start up properly, go to cleaning up")
			ctx.reportVmFault("Qemu did not start up properly, go to cleaning up")
			ctx.Close()
		case EVENT_INIT_CONNECTED:
			glog.Info("begin to wait vm commands")
			ctx.reportVmRun()
		case COMMAND_RELEASE:
			glog.Info("no pod on vm, got release, quit.")
			ctx.shutdownVM(false, "")
			ctx.Become(stateDestroying, "DESTRYING")
			ctx.reportVmShutdown()
		case COMMAND_EXEC:
			ctx.execCmd(ev.(*ExecCommand))
		case COMMAND_WINDOWSIZE:
			cmd := ev.(*WindowSizeCommand)
			ctx.setWindowSize(cmd.ClientTag, cmd.Size)
		case COMMAND_RUN_POD, COMMAND_REPLACE_POD:
			glog.Info("got spec, prepare devices")
			if ok := ctx.prepareDevice(ev.(*RunPodCommand)); ok {
				ctx.setTimeout(60)
				ctx.Become(stateStarting, "STARTING")
			}
		default:
			glog.Warning("got event during pod initiating")
		}
	}
}

func stateStarting(ctx *VmContext, ev QemuEvent) {
	if processed := commonStateHandler(ctx, ev, true); processed {
		//processed by common
	} else if processed := deviceInitHandler(ctx, ev); processed {
		if ctx.deviceReady() {
			glog.V(1).Info("device ready, could run pod.")
			ctx.startPod()
		}
	} else if processed := initFailureHandler(ctx, ev); processed {
		ctx.shutdownVM(true, "Fail during init pod running environment")
		ctx.Become(stateTerminating, "TERMINATING")
	} else {
		switch ev.Event() {
		case EVENT_QEMU_EXIT:
			glog.Info("Qemu did not start up properly, go to cleaning up")
			if closed := ctx.onQemuExit(true); !closed {
				ctx.Become(stateDestroying, "DESTROYING")
			}
		case EVENT_INIT_CONNECTED:
			glog.Info("begin to wait vm commands")
			ctx.reportVmRun()
		case COMMAND_RELEASE:
			glog.Info("pod starting, got release, please wait")
			ctx.reportBusy("")
		case COMMAND_ATTACH:
			ctx.attachCmd(ev.(*AttachCommand))
		case COMMAND_WINDOWSIZE:
			cmd := ev.(*WindowSizeCommand)
			if ctx.userSpec.Tty {
				ctx.setWindowSize(cmd.ClientTag, cmd.Size)
			}
		case COMMAND_ACK:
			ack := ev.(*CommandAck)
			glog.V(1).Infof("[starting] got init ack to %d", ack.reply)
			if ack.reply == INIT_STARTPOD {
				ctx.unsetTimeout()
				var pinfo []byte = []byte{}
				persist, err := ctx.dump()
				if err == nil {
					buf, err := persist.serialize()
					if err == nil {
						pinfo = buf
					}
				}
				ctx.reportSuccess("Start POD success", pinfo)
				ctx.Become(stateRunning, "RUNNING")
				glog.Info("pod start success ", string(ack.msg))
			}
		case ERROR_CMD_FAIL:
			ack := ev.(*CommandError)
			if ack.context.code == INIT_STARTPOD {
				reason := "Start POD failed"
				ctx.shutdownVM(true, reason)
				ctx.Become(stateTerminating, "TERMINATING")
				glog.Error(reason)
			}
		case EVENT_QEMU_TIMEOUT:
			reason := "Start POD timeout"
			ctx.shutdownVM(true, reason)
			ctx.Become(stateTerminating, "TERMINATING")
			glog.Error(reason)
		default:
			glog.Warning("got event during pod initiating")
		}
	}
}

func qmpHandler(ctx *VmContext) {

	go qmpInitializer(ctx)

	timer := time.AfterFunc(10*time.Second, func() {
		glog.Warning("Initializer Timeout.")
		ctx.qmp <- &QmpTimeout{}
	})

	type msgHandler func(QmpInteraction)
	var handler msgHandler = nil
	var conn *net.UnixConn = nil

	buf := []*QmpSession{}
	res := make(chan QmpInteraction, 128)

	loop := func(msg QmpInteraction) {
		switch msg.MessageType() {
		case QMP_SESSION:
			glog.Info("got new session")
			buf = append(buf, msg.(*QmpSession))
			if len(buf) == 1 {
				go qmpCommander(ctx.qmp, conn, msg.(*QmpSession), res)
			}
		case QMP_FINISH:
			glog.Infof("session finished, buffer size %d", len(buf))
			r := msg.(*QmpFinish)
			if r.success {
				glog.V(1).Info("success ")
				if r.callback != nil {
					ctx.hub <- r.callback
				}
			} else {
				reason := "unknown"
				if c, ok := r.reason["error"]; ok {
					reason = c.(string)
				}
				glog.Error("QMP command failed ", reason)
				ctx.hub <- &DeviceFailed{
					session: r.callback,
				}
			}
			buf = buf[1:]
			if len(buf) > 0 {
				go qmpCommander(ctx.qmp, conn, buf[0], res)
			}
		case QMP_RESULT, QMP_ERROR:
			res <- msg
		case QMP_EVENT:
			ev := msg.(*QmpEvent)
			ctx.hub <- ev
			if ev.Type == QMP_EVENT_SHUTDOWN {
				glog.Info("got QMP shutdown event, quit...")
				handler = nil
			}
		case QMP_INTERNAL_ERROR:
			res <- msg
			handler = nil
			glog.Info("QMP handler quit as received ", msg.(*QmpInternalError).cause)
			ctx.hub <- &Interrupted{reason: msg.(*QmpInternalError).cause}
		case QMP_QUIT:
			handler = nil
		}
	}

	initializing := func(msg QmpInteraction) {
		switch msg.MessageType() {
		case QMP_INIT:
			timer.Stop()
			init := msg.(*QmpInit)
			conn = init.conn
			handler = loop
			glog.Info("QMP initialzed, go into main QMP loop")

			//routine for get message
			go qmpReceiver(ctx.qmp, init.decoder)
			if len(buf) > 0 {
				go qmpCommander(ctx.qmp, conn, buf[0], res)
			}
		case QMP_FINISH:
			finish := msg.(*QmpFinish)
			if !finish.success {
				timer.Stop()
				ctx.hub <- &InitFailedEvent{
					reason: finish.reason["error"].(string),
				}
				handler = nil
				glog.Error("QMP initialize failed")
			}
		case QMP_TIMEOUT:
			ctx.hub <- &InitFailedEvent{
				reason: "QMP Init timeout",
			}
			handler = nil
			glog.Error("QMP initialize timeout")
		case QMP_SESSION:
			glog.Info("got new session during initializing")
			buf = append(buf, msg.(*QmpSession))
		}
	}
//.........這裏部分代碼省略.........