251 lines
8.2 KiB
Go
251 lines
8.2 KiB
Go
/*
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* Copyright 2020 The Dragonfly Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package rpcserver
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import (
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"context"
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"fmt"
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"io"
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"go.opentelemetry.io/otel"
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"go.opentelemetry.io/otel/trace"
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"google.golang.org/grpc"
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"d7y.io/dragonfly/v2/internal/dferrors"
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logger "d7y.io/dragonfly/v2/internal/dflog"
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"d7y.io/dragonfly/v2/pkg/idgen"
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"d7y.io/dragonfly/v2/pkg/rpc/base"
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"d7y.io/dragonfly/v2/pkg/rpc/scheduler"
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schedulerserver "d7y.io/dragonfly/v2/pkg/rpc/scheduler/server"
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"d7y.io/dragonfly/v2/scheduler/config"
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"d7y.io/dragonfly/v2/scheduler/core"
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"d7y.io/dragonfly/v2/scheduler/supervisor"
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)
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var tracer = otel.Tracer("scheduler-server")
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type server struct {
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*grpc.Server
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service *core.SchedulerService
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}
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// New returns a new transparent scheduler server from the given options
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func New(service *core.SchedulerService, opts ...grpc.ServerOption) (*grpc.Server, error) {
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svr := &server{
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service: service,
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}
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svr.Server = schedulerserver.New(svr, opts...)
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return svr.Server, nil
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}
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func (s *server) RegisterPeerTask(ctx context.Context, req *scheduler.PeerTaskRequest) (*scheduler.RegisterResult, error) {
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taskID := idgen.TaskID(req.Url, req.UrlMeta)
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log := logger.WithTaskAndPeerID(taskID, req.PeerId)
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log.Infof("register peer task, req: %#v", req)
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var span trace.Span
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ctx, span = tracer.Start(ctx, config.SpanPeerRegister, trace.WithSpanKind(trace.SpanKindServer))
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defer span.End()
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span.SetAttributes(config.AttributePeerRegisterRequest.String(req.String()))
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span.SetAttributes(config.AttributeTaskID.String(taskID))
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// Get task or add new task
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task := s.service.GetOrAddTask(ctx, supervisor.NewTask(taskID, req.Url, req.UrlMeta))
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if task.IsFail() {
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dferr := dferrors.New(base.Code_SchedTaskStatusError, "task status is fail")
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log.Error(dferr.Message)
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span.RecordError(dferr)
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return nil, dferr
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}
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// Task has been successful
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if task.IsSuccess() {
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log.Info("task has been successful")
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sizeScope := task.GetSizeScope()
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span.SetAttributes(config.AttributeTaskSizeScope.String(sizeScope.String()))
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switch sizeScope {
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case base.SizeScope_TINY:
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// when task.DirectPiece length is 0, data is downloaded by common peers, is not cdn
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if int64(len(task.DirectPiece)) == task.ContentLength.Load() {
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log.Info("task size scope is tiny and return piece content directly")
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return &scheduler.RegisterResult{
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TaskId: taskID,
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SizeScope: sizeScope,
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DirectPiece: &scheduler.RegisterResult_PieceContent{
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PieceContent: task.DirectPiece,
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},
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}, nil
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}
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// fallback to base.SizeScope_SMALL
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log.Warnf("task size scope is tiny, but task.DirectPiece length is %d, not %d",
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len(task.DirectPiece), task.ContentLength.Load())
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fallthrough
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case base.SizeScope_SMALL:
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log.Info("task size scope is small")
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peer := s.service.RegisterTask(req, task)
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parent, err := s.service.SelectParent(peer)
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if err != nil {
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log.Warn("task size scope is small and it can not select parent")
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span.AddEvent(config.EventSmallTaskSelectParentFail)
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return &scheduler.RegisterResult{
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TaskId: taskID,
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SizeScope: sizeScope,
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}, nil
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}
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firstPiece, ok := task.GetPiece(0)
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if !ok {
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log.Warn("task size scope is small and it can not get first piece")
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return &scheduler.RegisterResult{
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TaskId: taskID,
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SizeScope: sizeScope,
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}, nil
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}
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singlePiece := &scheduler.SinglePiece{
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DstPid: parent.ID,
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DstAddr: fmt.Sprintf("%s:%d", parent.Host.IP, parent.Host.DownloadPort),
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PieceInfo: &base.PieceInfo{
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PieceNum: firstPiece.PieceNum,
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RangeStart: firstPiece.RangeStart,
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RangeSize: firstPiece.RangeSize,
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PieceMd5: firstPiece.PieceMd5,
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PieceOffset: firstPiece.PieceOffset,
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PieceStyle: firstPiece.PieceStyle,
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},
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}
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log.Infof("task size scope is small and return single piece %#v", sizeScope)
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span.SetAttributes(config.AttributeSinglePiece.String(singlePiece.String()))
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return &scheduler.RegisterResult{
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TaskId: taskID,
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SizeScope: sizeScope,
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DirectPiece: &scheduler.RegisterResult_SinglePiece{
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SinglePiece: singlePiece,
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},
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}, nil
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default:
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log.Info("task size scope is normal and needs to be register")
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s.service.RegisterTask(req, task)
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return &scheduler.RegisterResult{
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TaskId: taskID,
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SizeScope: sizeScope,
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}, nil
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}
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}
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// Task is unsuccessful
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log.Info("task is unsuccessful and needs to be register")
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s.service.RegisterTask(req, task)
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return &scheduler.RegisterResult{
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TaskId: taskID,
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SizeScope: base.SizeScope_NORMAL,
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}, nil
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}
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func (s *server) ReportPieceResult(stream scheduler.Scheduler_ReportPieceResultServer) error {
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var span trace.Span
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ctx, span := tracer.Start(stream.Context(), config.SpanReportPieceResult, trace.WithSpanKind(trace.SpanKindServer))
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defer span.End()
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pieceResult, err := stream.Recv()
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if err != nil {
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if err == io.EOF {
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return nil
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}
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err = dferrors.Newf(base.Code_SchedPeerPieceResultReportFail, "receive an error from peer stream: %v", err)
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span.RecordError(err)
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return err
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}
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logger.Debugf("peer %s start report piece result", pieceResult.SrcPid)
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peer, ok := s.service.GetPeer(pieceResult.SrcPid)
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if !ok {
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err = dferrors.Newf(base.Code_SchedPeerNotFound, "peer %s not found", pieceResult.SrcPid)
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span.RecordError(err)
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return err
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}
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if peer.Task.IsFail() {
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err = dferrors.Newf(base.Code_SchedTaskStatusError, "peer's task status is fail, task status %s", peer.Task.GetStatus())
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span.RecordError(err)
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return err
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}
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conn, ok := peer.BindNewConn(stream)
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if !ok {
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err = dferrors.Newf(base.Code_SchedPeerPieceResultReportFail, "peer can not bind conn")
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span.RecordError(err)
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return err
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}
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logger.Infof("peer %s is connected", peer.ID)
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defer func() {
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logger.Infof("peer %s is disconnect: %v", peer.ID, conn.Error())
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span.RecordError(conn.Error())
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}()
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if err := s.service.HandlePieceResult(ctx, peer, pieceResult); err != nil {
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logger.Errorf("peer %s handle piece result %v fail: %v", peer.ID, pieceResult, err)
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}
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for {
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select {
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case <-conn.Done():
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return conn.Error()
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case piece := <-conn.Receiver():
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if piece == nil {
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logger.Infof("peer %s channel has been closed", peer.ID)
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continue
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}
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if err := s.service.HandlePieceResult(ctx, peer, piece); err != nil {
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logger.Errorf("peer %s handle piece result %v fail: %v", peer.ID, piece, err)
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}
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}
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}
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}
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func (s *server) ReportPeerResult(ctx context.Context, result *scheduler.PeerResult) (err error) {
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logger.Debugf("report peer result %v", result)
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var span trace.Span
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ctx, span = tracer.Start(ctx, config.SpanReportPeerResult, trace.WithSpanKind(trace.SpanKindServer))
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defer span.End()
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span.SetAttributes(config.AttributeReportPeerID.String(result.PeerId))
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span.SetAttributes(config.AttributePeerDownloadSuccess.Bool(result.Success))
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span.SetAttributes(config.AttributePeerDownloadResult.String(result.String()))
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peer, ok := s.service.GetPeer(result.PeerId)
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if !ok {
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logger.Warnf("report peer result: peer %s is not exists", result.PeerId)
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err = dferrors.Newf(base.Code_SchedPeerNotFound, "peer %s not found", result.PeerId)
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span.RecordError(err)
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return err
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}
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return s.service.HandlePeerResult(ctx, peer, result)
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}
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func (s *server) LeaveTask(ctx context.Context, target *scheduler.PeerTarget) (err error) {
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logger.Debugf("leave task %v", target)
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var span trace.Span
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ctx, span = tracer.Start(ctx, config.SpanPeerLeave, trace.WithSpanKind(trace.SpanKindServer))
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defer span.End()
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span.SetAttributes(config.AttributeLeavePeerID.String(target.PeerId))
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span.SetAttributes(config.AttributeLeaveTaskID.String(target.TaskId))
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peer, ok := s.service.GetPeer(target.PeerId)
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if !ok {
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logger.Warnf("leave task: peer %s is not exists", target.PeerId)
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return
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}
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return s.service.HandleLeaveTask(ctx, peer)
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}
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