291 lines
9.8 KiB
Go
291 lines
9.8 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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"sync"
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"d7y.io/dragonfly/v2/internal/dfcodes"
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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/rpc/base"
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"d7y.io/dragonfly/v2/pkg/rpc/base/common"
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"d7y.io/dragonfly/v2/pkg/rpc/scheduler"
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"d7y.io/dragonfly/v2/pkg/rpc/scheduler/server"
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"d7y.io/dragonfly/v2/pkg/util/net/urlutils"
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"d7y.io/dragonfly/v2/pkg/util/stringutils"
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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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"go.opentelemetry.io/otel"
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"go.opentelemetry.io/otel/trace"
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"golang.org/x/sync/errgroup"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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)
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var tracer trace.Tracer
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func init() {
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tracer = otel.Tracer("scheduler-server")
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}
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type SchedulerServer struct {
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service *core.SchedulerService
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}
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// NewSchedulerServer returns a new transparent scheduler server from the given options
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func NewSchedulerServer(service *core.SchedulerService) (server.SchedulerServer, error) {
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return &SchedulerServer{
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service: service,
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}, nil
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}
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func (s *SchedulerServer) RegisterPeerTask(ctx context.Context, request *scheduler.PeerTaskRequest) (resp *scheduler.RegisterResult, err error) {
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defer func() {
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logger.Debugf("peer %s register result %v, err: %v", request.PeerId, resp, err)
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}()
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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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span.SetAttributes(config.AttributePeerRegisterRequest.String(request.String()))
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defer span.End()
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logger.Debugf("register peer task, req: %+v", request)
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resp = new(scheduler.RegisterResult)
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if verifyErr := validateParams(request); verifyErr != nil {
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err = dferrors.Newf(dfcodes.BadRequest, "bad request param: %v", verifyErr)
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logger.Errorf("validate register request failed: %v", err)
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span.RecordError(err)
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return
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}
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taskID := s.service.GenerateTaskID(request.Url, request.UrlMeta, request.PeerId)
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span.SetAttributes(config.AttributeTaskID.String(taskID))
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task := supervisor.NewTask(taskID, request.Url, request.UrlMeta)
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task, err = s.service.GetOrCreateTask(ctx, task)
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if err != nil {
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err = dferrors.Newf(dfcodes.SchedCDNSeedFail, "create task failed: %v", err)
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logger.Errorf("get or create task failed: %v", err)
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span.RecordError(err)
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return
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}
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if task.IsFail() {
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err = dferrors.Newf(dfcodes.SchedTaskStatusError, "task status is %s", task.GetStatus())
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logger.Errorf("task status is unhealthy, task status is: %s", task.GetStatus())
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span.RecordError(err)
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return
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}
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resp.SizeScope = getTaskSizeScope(task)
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resp.TaskId = taskID
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switch resp.SizeScope {
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case base.SizeScope_TINY:
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resp.DirectPiece = &scheduler.RegisterResult_PieceContent{
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PieceContent: task.DirectPiece,
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}
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span.SetAttributes(config.AttributeTaskSizeScope.String(resp.SizeScope.String()))
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return
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case base.SizeScope_SMALL:
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span.SetAttributes(config.AttributeTaskSizeScope.String(resp.SizeScope.String()))
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peer, regErr := s.service.RegisterPeerTask(request, task)
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if regErr != nil {
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err = dferrors.Newf(dfcodes.SchedPeerRegisterFail, "failed to register peer: %v", regErr)
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span.RecordError(err)
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return
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}
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parent, schErr := s.service.ScheduleParent(peer)
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if schErr != nil {
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span.SetAttributes(config.AttributeTaskSizeScope.String(base.SizeScope_NORMAL.String()))
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span.AddEvent(config.EventScheduleParentFail)
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resp.SizeScope = base.SizeScope_NORMAL
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resp.TaskId = taskID
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//err = dferrors.Newf(dfcodes.SchedPeerScheduleFail, "failed to schedule peer %v: %v", peer.PeerID, schErr)
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return
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}
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firstPiece := task.GetPiece(0)
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singlePiece := &scheduler.SinglePiece{
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DstPid: parent.PeerID,
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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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resp.DirectPiece = &scheduler.RegisterResult_SinglePiece{
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SinglePiece: singlePiece,
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}
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span.SetAttributes(config.AttributeSinglePiece.String(singlePiece.String()))
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return
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default:
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span.SetAttributes(config.AttributeTaskSizeScope.String(resp.SizeScope.String()))
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_, regErr := s.service.RegisterPeerTask(request, task)
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if regErr != nil {
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err = dferrors.Newf(dfcodes.SchedPeerRegisterFail, "failed to register peer: %v", regErr)
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span.RecordError(regErr)
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}
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return
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}
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}
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func (s *SchedulerServer) 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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peerPacketChan := make(chan *scheduler.PeerPacket, 1)
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var peer *supervisor.Peer
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initialized := false
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ctx, cancel := context.WithCancel(ctx)
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g, ctx := errgroup.WithContext(ctx)
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var once sync.Once
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g.Go(func() error {
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defer func() {
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cancel()
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once.Do(peer.UnBindSendChannel)
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}()
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for {
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select {
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case <-ctx.Done():
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return nil
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default:
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pieceResult, err := stream.Recv()
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if err == io.EOF {
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span.AddEvent("report piece process exited because client has terminated sending the request")
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return nil
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}
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if err != nil {
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if status.Code(err) == codes.Canceled {
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span.AddEvent("report piece process exited because an error exception was received")
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if peer != nil {
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logger.Info("peer %s canceled", peer.PeerID)
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return nil
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}
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}
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return dferrors.Newf(dfcodes.SchedPeerPieceResultReportFail, "peer piece result report error: %v", err)
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}
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logger.Debugf("report piece result %v of peer %s", pieceResult, pieceResult.SrcPid)
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var ok bool
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peer, ok = s.service.GetPeerTask(pieceResult.SrcPid)
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if !ok {
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return dferrors.Newf(dfcodes.SchedPeerNotFound, "peer %s not found", pieceResult.SrcPid)
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}
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if !initialized {
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peer.BindSendChannel(peerPacketChan)
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peer.SetStatus(supervisor.PeerStatusRunning)
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initialized = true
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span.SetAttributes(config.AttributePeerID.String(peer.PeerID))
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span.AddEvent("init")
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}
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if pieceResult.PieceNum == common.EndOfPiece {
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return nil
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}
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if err := s.service.HandlePieceResult(ctx, peer, pieceResult); err != nil {
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logger.Errorf("handle piece result %v fail: %v", pieceResult, err)
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}
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}
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}
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})
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g.Go(func() error {
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defer func() {
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cancel()
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once.Do(peer.UnBindSendChannel)
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}()
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for {
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select {
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case <-ctx.Done():
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return nil
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case pp, ok := <-peerPacketChan:
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if !ok {
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span.AddEvent("exit report piece process due to send channel has closed")
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return nil
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}
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span.AddEvent("schedule event", trace.WithAttributes(config.AttributeSchedulePacket.String(pp.String())))
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err := stream.Send(pp)
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if err != nil {
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logger.Errorf("send peer %s schedule packet %v failed: %v", pp.SrcPid, pp, err)
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return dferrors.Newf(dfcodes.SchedPeerPieceResultReportFail, "peer piece result report error: %v", err)
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}
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}
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}
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})
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err := g.Wait()
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logger.Debugf("report piece result: %v", err)
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return err
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}
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func (s *SchedulerServer) 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.GetPeerTask(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(dfcodes.SchedPeerNotFound, "peer %s not found", result.PeerId)
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span.RecordError(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 *SchedulerServer) LeaveTask(ctx context.Context, target *scheduler.PeerTarget) (err error) {
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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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logger.Debugf("leave task %+v", target)
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peer, ok := s.service.GetPeerTask(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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err = dferrors.Newf(dfcodes.SchedPeerNotFound, "peer %s not found", target.PeerId)
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span.RecordError(err)
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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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// validateParams validates the params of scheduler.PeerTaskRequest.
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func validateParams(req *scheduler.PeerTaskRequest) error {
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if !urlutils.IsValidURL(req.Url) {
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return fmt.Errorf("invalid url: %s", req.Url)
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}
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if stringutils.IsEmpty(req.PeerId) {
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return fmt.Errorf("empty peerID")
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}
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return nil
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}
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func getTaskSizeScope(task *supervisor.Task) base.SizeScope {
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if task.IsSuccess() {
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if task.ContentLength <= supervisor.TinyFileSize {
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return base.SizeScope_TINY
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}
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if task.PieceTotal == 1 {
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return base.SizeScope_SMALL
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}
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}
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return base.SizeScope_NORMAL
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}
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