func waitInitReady(ctx *VmContext) {
conn, err := UnixSocketConnect(ctx.HyperSockName)
if err != nil {
glog.Error("Cannot connect to hyper socket ", err.Error())
ctx.Hub <- &InitFailedEvent{
Reason: "Cannot connect to hyper socket " + err.Error(),
}
return
}
glog.Info("Wating for init messages...")
msg, err := readVmMessage(conn.(*net.UnixConn))
if err != nil {
glog.Error("read init message failed... ", err.Error())
ctx.Hub <- &InitFailedEvent{
Reason: "read init message failed... " + err.Error(),
}
conn.Close()
} else if msg.code == INIT_READY {
glog.Info("Get init ready message")
ctx.Hub <- &InitConnectedEvent{conn: conn.(*net.UnixConn)}
go waitCmdToInit(ctx, conn.(*net.UnixConn))
} else {
glog.Warningf("Get init message %d", msg.code)
ctx.Hub <- &InitFailedEvent{
Reason: fmt.Sprintf("Get init message %d", msg.code),
}
conn.Close()
}
}
func makeHttpHandler(eng *engine.Engine, logging bool, localMethod string, localRoute string, handlerFunc HttpApiFunc, corsHeaders string, dockerVersion version.Version) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
// log the request
glog.V(0).Infof("Calling %s %s\n", localMethod, localRoute)
if logging {
glog.V(1).Infof("%s %s\n", r.Method, r.RequestURI)
}
if strings.Contains(r.Header.Get("User-Agent"), "Docker-Client/") {
userAgent := strings.Split(r.Header.Get("User-Agent"), "/")
if len(userAgent) == 2 && !dockerVersion.Equal(version.Version(userAgent[1])) {
glog.Warningf("client and server don't have the same version (client: %s, server: %s)", userAgent[1], dockerVersion)
}
}
version := version.Version(mux.Vars(r)["version"])
if version == "" {
version = utils.APIVERSION
}
if corsHeaders != "" {
writeCorsHeaders(w, r, corsHeaders)
}
if version.GreaterThan(utils.APIVERSION) {
http.Error(w, fmt.Errorf("client and server don't have same version (client API version: %s, server API version: %s)", version, utils.APIVERSION).Error(), http.StatusNotFound)
return
}
if err := handlerFunc(eng, version, w, r, mux.Vars(r)); err != nil {
glog.Errorf("Handler for %s %s returned error: %s", localMethod, localRoute, err)
httpError(w, err)
}
}
}
func UmountVolume(shareDir, volPath string, name string, hub chan QemuEvent) {
mount := path.Join(shareDir, volPath)
success := true
err := syscall.Unmount(mount, 0)
if err != nil {
glog.Warningf("Cannot umount volume %s: %s", mount, err.Error())
err = syscall.Unmount(mount, syscall.MNT_DETACH)
if err != nil {
glog.Warningf("Cannot lazy umount volume %s: %s", mount, err.Error())
success = false
} else {
success = true
}
}
if success == true {
os.Remove(mount)
}
// After umount that device, we need to delete it
hub <- &VolumeUnmounted{Name: name, Success: success}
}
func aufsUnmount(target string) error {
glog.V(1).Infof("Ready to unmount the target : %s", target)
cmdString := fmt.Sprintf("auplink %s flush", target)
cmd := exec.Command("/bin/sh", "-c", cmdString)
if output, err := cmd.CombinedOutput(); err != nil {
glog.Warningf("Couldn't run auplink command : %s\n%s\n", err.Error(), output)
}
if err := syscall.Unmount(target, 0); err != nil {
return err
}
return nil
}
func aufsUnmount(target string) error {
glog.V(1).Infof("Ready to unmount the target : %s", target)
if _, err := os.Stat(target); err != nil && os.IsNotExist(err) {
return nil
}
cmdString := fmt.Sprintf("auplink %s flush", target)
cmd := exec.Command("/bin/sh", "-c", cmdString)
if err := cmd.Run(); err != nil {
glog.Warningf("Couldn't run auplink command : %s\n", err.Error())
}
if err := syscall.Unmount(target, 0); err != nil {
return err
}
return nil
}
func UmountAufsContainer(shareDir, image string, index int, hub chan QemuEvent) {
mount := path.Join(shareDir, image)
success := true
for i := 0; i < 10; i++ {
time.Sleep(3 * time.Second / 1000)
err := aufs.Unmount(mount)
if err != nil {
glog.Warningf("Cannot umount aufs %s: %s", mount, err.Error())
success = false
} else {
success = true
break
}
}
hub <- &ContainerUnmounted{Index: index, Success: success}
}
func UmountDMDevice(deviceFullPath, name string, hub chan QemuEvent) {
args := fmt.Sprintf("dmsetup remove -f %s", deviceFullPath)
cmd := exec.Command("/bin/sh", "-c", args)
success := true
if output, err := cmd.CombinedOutput(); err != nil {
glog.Warningf("Cannot umount device %s: %s, %s", deviceFullPath, err.Error(), output)
// retry
cmd := exec.Command("/bin/sh", "-c", args)
if err := cmd.Run(); err != nil {
success = false
}
} else {
// Command was successful
success = true
}
// After umount that device, we need to delete it
hub <- &BlockdevRemovedEvent{Name: name, Success: success}
}
func UmountOverlayContainer(shareDir, image string, index int, hub chan QemuEvent) {
mount := path.Join(shareDir, image)
success := true
for i := 0; i < 10; i++ {
time.Sleep(3 * time.Second / 1000)
err := syscall.Unmount(mount, 0)
if err != nil {
if strings.Contains(err.Error(), "no such file or directory") {
break
}
glog.Warningf("Cannot umount overlay %s: %s", mount, err.Error())
success = false
} else {
success = true
break
}
}
hub <- &ContainerUnmounted{Index: index, Success: success}
}
func UmountOverlayContainer(shareDir, image string, index int, hub chan VmEvent) {
mount := path.Join(shareDir, image)
success := true
for i := 0; i < 10; i++ {
time.Sleep(3 * time.Second / 1000)
err := syscall.Unmount(mount, 0)
if err != nil {
if !strings.Contains(strings.ToLower(err.Error()), "device or resource busy") {
success = true
break
}
glog.Warningf("Cannot umount overlay %s: %s", mount, err.Error())
success = false
} else {
success = true
break
}
}
hub <- &ContainerUnmounted{Index: index, Success: success}
}
func mainDaemon(config, host string) {
glog.V(0).Infof("The config file is %s", config)
if config == "" {
config = "/etc/hyper/config"
}
eng := engine.New(config)
d, err := daemon.NewDaemon(eng)
if err != nil {
glog.Errorf("The hyperd create failed, %s\n", err.Error())
return
}
stopAll := make(chan os.Signal, 1)
signal.Notify(stopAll, syscall.SIGINT, syscall.SIGTERM)
stop := make(chan os.Signal, 1)
signal.Notify(stop, syscall.SIGHUP)
// Install the accepted jobs
if err := d.Install(eng); err != nil {
glog.Errorf("The hyperd install failed, %s\n", err.Error())
return
}
glog.V(0).Infof("Hyper daemon: %s %s\n",
utils.VERSION,
utils.GITCOMMIT,
)
// after the daemon is done setting up we can tell the api to start
// accepting connections
if err := eng.Job("acceptconnections").Run(); err != nil {
glog.Error("the acceptconnections job run failed!\n")
return
}
defaultHost := []string{}
if host != "" {
defaultHost = append(defaultHost, host)
}
defaultHost = append(defaultHost, "unix:///var/run/hyper.sock")
if d.Host != "" {
defaultHost = append(defaultHost, d.Host)
}
job := eng.Job("serveapi", defaultHost...)
// The serve API job never exits unless an error occurs
// We need to start it as a goroutine and wait on it so
// daemon doesn't exit
serveAPIWait := make(chan error)
go func() {
if err := job.Run(); err != nil {
glog.Errorf("ServeAPI error: %v\n", err)
serveAPIWait <- err
return
}
serveAPIWait <- nil
}()
glog.V(0).Info("Daemon has completed initialization\n")
if err := d.Restore(); err != nil {
glog.Warningf("Fail to restore the previous VM")
return
}
// Daemon is fully initialized and handling API traffic
// Wait for serve API job to complete
select {
case errAPI := <-serveAPIWait:
// If we have an error here it is unique to API (as daemonErr would have
// exited the daemon process above)
eng.Shutdown()
if errAPI != nil {
glog.Warningf("Shutting down due to ServeAPI error: %v\n", errAPI)
}
break
case <-stop:
d.DestroyAndKeepVm()
eng.Shutdown()
break
case <-stopAll:
d.DestroyAllVm()
eng.Shutdown()
break
}
}
