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))
}
}
handler = initializing
for handler != nil {
msg := <-ctx.qmp
handler(msg)
}
}