func (s *SkynetDaemon) Deploy(requestInfo *skynet.RequestInfo, in daemon.DeployRequest, out *daemon.DeployResponse) (err error) {
out.UUID = skynet.UUID()
s.Log.Trace(fmt.Sprintf("%+v", SubserviceDeployment{
ServicePath: in.ServicePath,
Args: in.Args,
}))
ss, err := NewSubService(s, in.ServicePath, in.Args, out.UUID)
if err != nil {
return
}
s.serviceLock.Lock()
s.Services[out.UUID] = ss
s.serviceLock.Unlock()
start, startErr := ss.Start()
if startErr != nil {
return errors.New("Service failed to start: " + startErr.Error())
} else if !start {
return errors.New("Service failed to start")
}
return
}
func main() {
var err error
flag.Parse()
log = skynet.NewConsoleSemanticLogger("dashboard", os.Stderr)
if *mgoserver == "" {
log.Trace(fmt.Sprintf("%+v", skynet.MongoError{
"",
"No mongodb server url (both -mgoserver and SKYNET_MGOSERVER missing)",
}))
}
mlogger, err := skynet.NewMongoSemanticLogger(*mgoserver, "skynet",
"log", skynet.UUID())
if err != nil {
log.Error(fmt.Sprintf("%+v", skynet.MongoError{
Addr: "Could not connect to mongo db for logging",
Err: err.Error(),
}))
}
log = skynet.NewMultiSemanticLogger(mlogger, log)
DC = Doozer()
http.HandleFunc("/", indexHandler)
http.HandleFunc("/logs/search", searchHandler)
http.Handle("/media/", http.StripPrefix("/media/", http.FileServer(http.Dir(*webroot+"/tmpl"))))
http.Handle("/favicon.ico", http.FileServer(http.Dir(*webroot+"/tmpl/images")))
http.Handle("/logs/ws", websocket.Handler(wsHandler))
im := client.NewInstanceMonitor(DC, true)
http.Handle("/instances/ws", websocket.Handler(func(ws *websocket.Conn) {
NewInstanceSocket(ws, im)
}))
// Cache templates
layoutTmpl = template.Must(template.ParseFiles(*webroot +
"/tmpl/layout.html.template"))
indexTmpl = template.Must(template.ParseFiles(*webroot +
"/tmpl/index.html.template"))
searchTmpl = template.Must(template.ParseFiles(*webroot +
"/tmpl/search.html.template"))
err = http.ListenAndServe(*addr, nil)
if err != nil {
log.Fatal("ListenAndServe: " + err.Error())
}
}
func newServiceClient(query *skynet.Query, c *Client) (sc *ServiceClient) {
sc = &ServiceClient{
client: c,
Log: c.Config.Log,
cconfig: c.Config,
query: query,
instances: make(map[string]*servicePool),
chooser: NewInstanceChooser(c),
muxChan: make(chan interface{}),
timeoutChan: make(chan timeoutLengths),
retryTimeout: skynet.DefaultRetryDuration,
giveupTimeout: skynet.DefaultTimeoutDuration,
}
sc.listenID = skynet.UUID()
sc.instanceListener = c.instanceMonitor.Listen(sc.listenID, query, true)
go sc.mux()
return
}
func NewInstanceSocket(ws *websocket.Conn, im *client.InstanceMonitor) {
closeChan := make(chan bool, 1)
readChan := make(chan SocketRequest)
ticker := time.NewTicker(5 * time.Second)
lastHeartbeat := time.Now()
go instanceSocketRead(ws, readChan, closeChan)
l := im.Listen(skynet.UUID(), &skynet.Query{}, true)
instances := <-l.NotificationChan
err := websocket.JSON.Send(ws, SocketResponse{Action: "List", Data: instances})
if err != nil {
closeChan <- true
}
for {
select {
case <-closeChan:
ticker.Stop()
ws.Close()
l.Close()
case t := <-ticker.C:
// Check for timeout
if t.Sub(lastHeartbeat) > (15 * time.Second) {
closeChan <- true
}
case request := <-readChan:
lastHeartbeat = time.Now()
switch request.Action {
case "List":
err := websocket.JSON.Send(ws, SocketResponse{Action: "List", Data: instances})
if err != nil {
closeChan <- true
}
case "Heartbeat":
// this is here more for documentation purposes,
// setting the lastHeartbeat on read handles the logic
// here
case "Filter":
if request.Data != nil {
data := request.Data.(map[string]interface{})
if r, ok := data["Reset"]; ok {
reset := r.(bool)
if reset {
l.Query.Reset()
}
}
if r, ok := data["Registered"]; ok {
filter := r.(bool)
l.Query.Registered = &filter
}
}
instances := l.GetInstances()
iln := make(client.InstanceListenerNotification)
for _, i := range instances {
path := i.GetConfigPath()
iln[path] = client.InstanceMonitorNotification{
Path: path,
Service: i,
Type: client.InstanceAddNotification,
}
}
err := websocket.JSON.Send(ws, SocketResponse{Action: "List", Data: iln})
if err != nil {
closeChan <- true
}
}
case notification := <-l.NotificationChan:
var err error
// Forward message as it stands across the websocket
err = websocket.JSON.Send(ws, SocketResponse{Action: "Update", Data: notification})
instances = instances.Join(notification)
if err != nil {
closeChan <- true
}
}
}
}
func (c *ServiceClient) send(retry, giveup time.Duration, ri *skynet.RequestInfo, fn string, in interface{}, out interface{}) (err error) {
if ri == nil {
ri = &skynet.RequestInfo{
RequestID: skynet.UUID(),
}
}
attempts := make(chan sendAttempt)
var ticker <-chan time.Time
if retry > 0 {
ticker = time.NewTicker(retry).C
}
var timeout <-chan time.Time
if giveup > 0 {
timeout = time.NewTimer(giveup).C
}
doneSignal := make(chan bool)
attemptCount := 1
defer func() {
go func() {
for i := 0; i < attemptCount; i++ {
doneSignal <- true
}
}()
}()
go c.attemptSend(doneSignal, attempts, ri, fn, in)
for {
select {
case <-ticker:
attemptCount++
ri.RetryCount++
go c.attemptSend(doneSignal, attempts, ri, fn, in)
case <-timeout:
if err == nil {
err = ErrRequestTimeout
}
// otherwise use the last error reported from an attempt
return
case attempt := <-attempts:
err = attempt.err
if err != nil {
if _, ok := err.(serviceError); !ok {
// error during transmition, abort this attempt
if giveup == 0 {
return
}
continue
}
}
unmarshallerr := bson.Unmarshal(attempt.result, out)
if unmarshallerr != nil {
err = unmarshallerr
}
return
}
}
return
}
// this function is the goroutine that owns this service - all thread-sensitive data needs to
// be manipulated only through here.
func (s *Service) mux() {
loop:
for {
select {
case conn := <-s.connectionChan:
atomic.AddInt32(&s.Stats.Clients, 1)
clientID := skynet.UUID()
s.clientMutex.Lock()
s.ClientInfo[clientID] = ClientInfo{
Address: conn.RemoteAddr(),
}
s.clientMutex.Unlock()
// send the server handshake
sh := skynet.ServiceHandshake{
Registered: s.Registered,
ClientID: clientID,
}
encoder := bsonrpc.NewEncoder(conn)
err := encoder.Encode(sh)
if err != nil {
s.Log.Error(err.Error())
atomic.AddInt32(&s.Stats.Clients, -1)
break
}
if !s.Registered {
conn.Close()
atomic.AddInt32(&s.Stats.Clients, -1)
break
}
// read the client handshake
var ch skynet.ClientHandshake
decoder := bsonrpc.NewDecoder(conn)
err = decoder.Decode(&ch)
if err != nil {
s.Log.Error("Error calling bsonrpc.NewDecoder: " + err.Error())
atomic.AddInt32(&s.Stats.Clients, -1)
break
}
// here do stuff with the client handshake
go func() {
s.RPCServ.ServeCodec(bsonrpc.NewServerCodec(conn))
atomic.AddInt32(&s.Stats.Clients, -1)
}()
case register := <-s.registeredChan:
if register {
s.register()
} else {
s.unregister()
}
case _ = <-s.doneChan:
go func() {
for _ = range s.doneChan {
}
}()
s.RemoveFromCluster()
s.doozerChan <- doozerFinish{}
break loop
case _ = <-s.updateTicker.C:
s.UpdateDoozerStats()
}
}
}