func waitForPortForwardDataStreamAndRun(pod string, uid types.UID, errorStream httpstream.Stream, dataStreamChan chan httpstream.Stream, host HostInterface) {
defer errorStream.Reset()
var dataStream httpstream.Stream
select {
case dataStream = <-dataStreamChan:
case <-time.After(streamCreationTimeout):
errorStream.Write([]byte("Timed out waiting for data stream"))
//TODO delete from dataStreamChans[port]
return
}
portString := dataStream.Headers().Get(api.PortHeader)
port, _ := strconv.ParseUint(portString, 10, 16)
err := host.PortForward(pod, uid, uint16(port), dataStream)
if err != nil {
msg := fmt.Errorf("Error forwarding port %d to pod %s, uid %v: %v", port, pod, uid, err)
glog.Error(msg)
errorStream.Write([]byte(msg.Error()))
}
}
// handleExec handles requests to run a command inside a container.
func (s *Server) handleExec(w http.ResponseWriter, req *http.Request) {
u, err := url.ParseRequestURI(req.RequestURI)
if err != nil {
s.error(w, err)
return
}
podNamespace, podID, uid, container, err := parseContainerCoordinates(u.Path)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
pod, ok := s.host.GetPodByName(podNamespace, podID)
if !ok {
http.Error(w, "Pod does not exist", http.StatusNotFound)
return
}
req.ParseForm()
// start at 1 for error stream
expectedStreams := 1
if req.FormValue(api.ExecStdinParam) == "1" {
expectedStreams++
}
if req.FormValue(api.ExecStdoutParam) == "1" {
expectedStreams++
}
tty := req.FormValue(api.ExecTTYParam) == "1"
if !tty && req.FormValue(api.ExecStderrParam) == "1" {
expectedStreams++
}
if expectedStreams == 1 {
http.Error(w, "You must specify at least 1 of stdin, stdout, stderr", http.StatusBadRequest)
return
}
streamCh := make(chan httpstream.Stream)
upgrader := spdy.NewResponseUpgrader()
conn := upgrader.UpgradeResponse(w, req, func(stream httpstream.Stream) error {
streamCh <- stream
return nil
})
// from this point on, we can no longer call methods on w
if conn == nil {
// The upgrader is responsible for notifying the client of any errors that
// occurred during upgrading. All we can do is return here at this point
// if we weren't successful in upgrading.
return
}
defer conn.Close()
conn.SetIdleTimeout(s.host.StreamingConnectionIdleTimeout())
// TODO make it configurable?
expired := time.NewTimer(streamCreationTimeout)
var errorStream, stdinStream, stdoutStream, stderrStream httpstream.Stream
receivedStreams := 0
WaitForStreams:
for {
select {
case stream := <-streamCh:
streamType := stream.Headers().Get(api.StreamType)
switch streamType {
case api.StreamTypeError:
errorStream = stream
defer errorStream.Reset()
receivedStreams++
case api.StreamTypeStdin:
stdinStream = stream
receivedStreams++
case api.StreamTypeStdout:
stdoutStream = stream
receivedStreams++
case api.StreamTypeStderr:
stderrStream = stream
receivedStreams++
default:
glog.Errorf("Unexpected stream type: '%s'", streamType)
}
if receivedStreams == expectedStreams {
break WaitForStreams
}
case <-expired.C:
// TODO find a way to return the error to the user. Maybe use a separate
// stream to report errors?
glog.Error("Timed out waiting for client to create streams")
return
}
}
if stdinStream != nil {
// close our half of the input stream, since we won't be writing to it
stdinStream.Close()
}
err = s.host.ExecInContainer(kubecontainer.GetPodFullName(pod), uid, container, u.Query()[api.ExecCommandParamm], stdinStream, stdoutStream, stderrStream, tty)
if err != nil {
msg := fmt.Sprintf("Error executing command in container: %v", err)
glog.Error(msg)
errorStream.Write([]byte(msg))
}
}