func (s *rpcServer) Enter(inStream pb.Kurma_EnterServer) error {
s.log.Debug("Received enter request")
// read the first chunk to make sure its real and get the container ID
chunk, err := inStream.Recv()
if err != nil {
return err
}
// create the outbound stream
outStream, err := s.client.Enter(inStream.Context())
if err != nil {
return err
}
// Create our inbound streams
inWriter := pb.NewByteStreamWriter(inStream, chunk.StreamId)
inReader := pb.NewByteStreamReader(inStream, nil)
// Create our outbound streams
outWriter := pb.NewByteStreamWriter(outStream, chunk.StreamId)
outReader := pb.NewByteStreamReader(outStream, nil)
// write the first byte to the backend so it is initialized
if _, err := outWriter.Write(nil); err != nil {
return err
}
// stream between!
go io.Copy(outWriter, inReader)
io.Copy(inWriter, outReader)
outStream.CloseSend()
return nil
}
func enter(cmd *cli.Cmd) error {
// Set the local terminal in raw mode to turn off buffering and local
// echo. Also defers setting it back to normal for when the call is done.
termios, err := raw.MakeRaw(os.Stdin.Fd())
if err != nil {
return err
}
defer raw.TcSetAttr(os.Stdin.Fd(), termios)
// Initialize the call and send the first packet so that it knows what
// container we're connecting to.
stream, err := cmd.Client.Enter(context.Background())
if err != nil {
return err
}
w := pb.NewByteStreamWriter(stream, cmd.Args[0])
r := pb.NewByteStreamReader(stream, nil)
if _, err := w.Write(nil); err != nil {
return err
}
go io.Copy(w, os.Stdin)
io.Copy(os.Stdout, r)
stream.CloseSend()
return nil
}
func (s *rpcServer) UploadImage(stream pb.Kurma_UploadImageServer) error {
s.log.Debug("Received upload request")
packet, err := stream.Recv()
if err != nil {
return err
}
pc := s.pendingUploads[packet.StreamId]
delete(s.pendingUploads, packet.StreamId)
r := pb.NewByteStreamReader(stream, packet)
s.log.Debug("Initializing container")
_, err = s.manager.Create(pc.name, pc.imageManifest, r)
return err
}
func (s *rpcServer) Enter(stream pb.Kurma_EnterServer) error {
s.log.Debug("Received enter request")
// Receive the first chunk so we can get the stream ID, which will be the UUID
// of the container. The byte portion will be blank, the client always sends a
// chunk first so the UUID is available immediately.
chunk, err := stream.Recv()
if err != nil {
return err
}
// get the container
container := s.manager.Container(chunk.StreamId)
if container == nil {
return fmt.Errorf("specified container not found")
}
// configure the io.Reader/Writer for the transport
w := pb.NewByteStreamWriter(stream, chunk.StreamId)
r := pb.NewByteStreamReader(stream, nil)
// create a pty, which we'll use for the process entering the container and
// copy the data back up the transport.
master, slave, err := pty.Open()
if err != nil {
return err
}
defer func() {
slave.Close()
master.Close()
}()
go io.Copy(w, master)
go io.Copy(master, r)
// enter into the container
if err := container.Enter(slave); err != nil {
return err
}
s.log.Debugf("Enter request finished")
return nil
}
func (s *rpcServer) UploadImage(inStream pb.Kurma_UploadImageServer) error {
s.log.Debug("Received upload request")
// NOTE: Unlike in the local daemon, we don't need to revalidate the image
// manifest between Create and Upload. The backend validates in the Manager
// because within the backend, there are multiple inputs to Manager.Create
// (ie, bootstrapping vs the local API).
//
// Over the local API, it will cache the image manifest from the Create call
// and re-use it on the UploadImage call, not pulling it from the binary
// image.
packet, err := inStream.Recv()
if err != nil {
return err
}
outStream, err := s.client.UploadImage(inStream.Context())
if err != nil {
return err
}
r := pb.NewByteStreamReader(inStream, packet)
w := pb.NewByteStreamWriter(outStream, packet.StreamId)
if _, err := io.Copy(w, r); err != nil {
return fmt.Errorf("write error: %v", err)
}
if _, err := outStream.CloseAndRecv(); err != nil {
return err
}
if err := inStream.SendAndClose(&pb.None{}); err != nil {
return err
}
return nil
}
