869 lines
30 KiB
Go
869 lines
30 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 service
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import (
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"context"
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"fmt"
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"io"
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"time"
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"go.opentelemetry.io/otel/trace"
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"google.golang.org/grpc/status"
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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/container/set"
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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/errordetails"
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rpcscheduler "d7y.io/dragonfly/v2/pkg/rpc/scheduler"
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pkgtime "d7y.io/dragonfly/v2/pkg/time"
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"d7y.io/dragonfly/v2/scheduler/config"
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"d7y.io/dragonfly/v2/scheduler/metrics"
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"d7y.io/dragonfly/v2/scheduler/resource"
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"d7y.io/dragonfly/v2/scheduler/scheduler"
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"d7y.io/dragonfly/v2/scheduler/storage"
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)
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type Service struct {
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// Resource interface.
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resource resource.Resource
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// Scheduler interface.
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scheduler scheduler.Scheduler
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// Scheduelr service config.
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config *config.Config
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// Dynamic config.
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dynconfig config.DynconfigInterface
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// Storage interface.
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storage storage.Storage
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}
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// New service instance.
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func New(
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cfg *config.Config,
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resource resource.Resource,
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scheduler scheduler.Scheduler,
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dynconfig config.DynconfigInterface,
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storage storage.Storage,
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) *Service {
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return &Service{
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resource: resource,
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scheduler: scheduler,
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config: cfg,
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dynconfig: dynconfig,
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storage: storage,
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}
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}
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// RegisterPeerTask registers peer and triggers seed peer download task.
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func (s *Service) RegisterPeerTask(ctx context.Context, req *rpcscheduler.PeerTaskRequest) (*rpcscheduler.RegisterResult, error) {
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// Register task and trigger seed peer download task.
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task, needBackToSource, err := s.registerTask(ctx, req)
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if err != nil {
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msg := fmt.Sprintf("peer %s register is failed: %s", req.PeerId, err.Error())
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logger.Error(msg)
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return nil, dferrors.New(base.Code_SchedTaskStatusError, msg)
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}
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host := s.registerHost(ctx, req.PeerHost)
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peer := s.registerPeer(ctx, req.PeerId, task, host, req.UrlMeta.Tag)
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peer.Log.Infof("register peer task request: %#v %#v %#v", req, req.UrlMeta, req.HostLoad)
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// When the peer registers for the first time and
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// does not have a seed peer, it will back-to-source.
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peer.NeedBackToSource.Store(needBackToSource)
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// The task state is TaskStateSucceeded and SizeScope is not invalid.
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sizeScope, err := task.SizeScope()
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if task.FSM.Is(resource.TaskStateSucceeded) && err == nil {
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peer.Log.Info("task can be reused")
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switch sizeScope {
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case base.SizeScope_TINY:
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peer.Log.Info("task size scope is tiny and return piece content directly")
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if len(task.DirectPiece) > 0 && int64(len(task.DirectPiece)) == task.ContentLength.Load() {
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if err := peer.FSM.Event(resource.PeerEventRegisterTiny); err != nil {
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msg := fmt.Sprintf("peer %s register is failed: %s", req.PeerId, err.Error())
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peer.Log.Error(msg)
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return nil, dferrors.New(base.Code_SchedError, msg)
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}
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return &rpcscheduler.RegisterResult{
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TaskId: task.ID,
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TaskType: task.Type,
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SizeScope: base.SizeScope_TINY,
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DirectPiece: &rpcscheduler.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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peer.Log.Warnf("task size scope is tiny, length of direct piece is %d and content length is %d. fall through to size scope small",
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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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peer.Log.Info("task size scope is small")
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// There is no need to build a tree, just find the parent and return.
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parent, ok := s.scheduler.FindParent(ctx, peer, set.NewSafeSet[string]())
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if !ok {
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peer.Log.Warn("task size scope is small and it can not select parent")
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if err := peer.FSM.Event(resource.PeerEventRegisterNormal); err != nil {
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msg := fmt.Sprintf("peer %s register is failed: %s", req.PeerId, err.Error())
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peer.Log.Error(msg)
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return nil, dferrors.New(base.Code_SchedError, msg)
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}
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return &rpcscheduler.RegisterResult{
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TaskId: task.ID,
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TaskType: task.Type,
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SizeScope: base.SizeScope_NORMAL,
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}, nil
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}
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// When task size scope is small, parent must be downloaded successfully
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// before returning to the parent directly.
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if !parent.FSM.Is(resource.PeerStateSucceeded) {
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peer.Log.Infof("task size scope is small and download state %s is not PeerStateSucceeded", parent.FSM.Current())
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if err := peer.FSM.Event(resource.PeerEventRegisterNormal); err != nil {
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msg := fmt.Sprintf("peer %s register is failed: %s", req.PeerId, err.Error())
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peer.Log.Error(msg)
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return nil, dferrors.New(base.Code_SchedError, msg)
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}
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return &rpcscheduler.RegisterResult{
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TaskId: task.ID,
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TaskType: task.Type,
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SizeScope: base.SizeScope_NORMAL,
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}, nil
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}
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firstPiece, ok := task.LoadPiece(0)
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if !ok {
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peer.Log.Warn("task size scope is small and it can not get first piece")
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if err := peer.FSM.Event(resource.PeerEventRegisterNormal); err != nil {
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msg := fmt.Sprintf("peer %s register is failed: %s", req.PeerId, err.Error())
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peer.Log.Error(msg)
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return nil, dferrors.New(base.Code_SchedError, msg)
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}
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return &rpcscheduler.RegisterResult{
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TaskId: task.ID,
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TaskType: task.Type,
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SizeScope: base.SizeScope_NORMAL,
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}, nil
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}
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// Delete inedges of peer.
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if err := task.DeletePeerInEdges(peer.ID); err != nil {
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msg := fmt.Sprintf("peer deletes inedges failed: %s", err.Error())
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peer.Log.Error(msg)
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return nil, dferrors.New(base.Code_SchedError, msg)
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}
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// Add edges between parent and peer.
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if err := task.AddPeerEdge(parent, peer); err != nil {
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peer.Log.Warnf("peer adds edge failed: %s", err.Error())
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if err := peer.FSM.Event(resource.PeerEventRegisterNormal); err != nil {
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msg := fmt.Sprintf("peer %s register is failed: %s", req.PeerId, err.Error())
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peer.Log.Error(msg)
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return nil, dferrors.New(base.Code_SchedError, msg)
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}
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return &rpcscheduler.RegisterResult{
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TaskId: task.ID,
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TaskType: task.Type,
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SizeScope: base.SizeScope_NORMAL,
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}, nil
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}
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if err := peer.FSM.Event(resource.PeerEventRegisterSmall); err != nil {
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msg := fmt.Sprintf("peer %s register is failed: %s", req.PeerId, err.Error())
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peer.Log.Error(msg)
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return nil, dferrors.New(base.Code_SchedError, msg)
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}
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peer.Log.Infof("schedule parent successful, replace parent to %s ", parent.ID)
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singlePiece := &rpcscheduler.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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peer.Log.Infof("task size scope is small and return single piece: %#v %#v", singlePiece, singlePiece.PieceInfo)
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return &rpcscheduler.RegisterResult{
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TaskId: task.ID,
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TaskType: task.Type,
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SizeScope: base.SizeScope_SMALL,
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DirectPiece: &rpcscheduler.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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peer.Log.Info("task size scope is normal and needs to be register")
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if err := peer.FSM.Event(resource.PeerEventRegisterNormal); err != nil {
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msg := fmt.Sprintf("peer %s register is failed: %s", req.PeerId, err.Error())
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peer.Log.Error(msg)
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return nil, dferrors.New(base.Code_SchedError, msg)
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}
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return &rpcscheduler.RegisterResult{
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TaskId: task.ID,
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TaskType: task.Type,
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SizeScope: base.SizeScope_NORMAL,
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}, nil
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}
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}
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// Task is unsuccessful.
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peer.Log.Infof("task state is %s and needs to be register", task.FSM.Current())
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if err := peer.FSM.Event(resource.PeerEventRegisterNormal); err != nil {
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msg := fmt.Sprintf("peer %s register is failed: %s", req.PeerId, err.Error())
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peer.Log.Error(msg)
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return nil, dferrors.New(base.Code_SchedError, msg)
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}
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return &rpcscheduler.RegisterResult{
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TaskId: task.ID,
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TaskType: task.Type,
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||
SizeScope: base.SizeScope_NORMAL,
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}, nil
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}
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// ReportPieceResult handles the piece information reported by dfdaemon.
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func (s *Service) ReportPieceResult(stream rpcscheduler.Scheduler_ReportPieceResultServer) error {
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ctx := stream.Context()
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var (
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peer *resource.Peer
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initialized bool
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ok bool
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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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logger.Infof("context was done")
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return ctx.Err()
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default:
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}
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piece, 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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logger.Errorf("receive piece %#v error: %s", piece, err.Error())
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return err
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}
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if !initialized {
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initialized = true
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// Get peer from peer manager.
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peer, ok = s.resource.PeerManager().Load(piece.SrcPid)
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if !ok {
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msg := fmt.Sprintf("peer %s not found", piece.SrcPid)
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logger.Error(msg)
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return dferrors.New(base.Code_SchedPeerNotFound, msg)
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}
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||
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// Peer setting stream.
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peer.StoreStream(stream)
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defer peer.DeleteStream()
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}
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if piece.PieceInfo != nil {
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// Handle begin of piece.
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if piece.PieceInfo.PieceNum == common.BeginOfPiece {
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peer.Log.Infof("receive begin of piece: %#v %#v", piece, piece.PieceInfo)
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s.handleBeginOfPiece(ctx, peer)
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continue
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}
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||
|
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// Handle end of piece.
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if piece.PieceInfo.PieceNum == common.EndOfPiece {
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peer.Log.Infof("receive end of piece: %#v %#v", piece, piece.PieceInfo)
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s.handleEndOfPiece(ctx, peer)
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continue
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}
|
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}
|
||
|
||
// Handle piece download successfully.
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if piece.Success {
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peer.Log.Infof("receive piece: %#v %#v", piece, piece.PieceInfo)
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s.handlePieceSuccess(ctx, peer, piece)
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||
|
||
// Collect peer host traffic metrics.
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||
if s.config.Metrics != nil && s.config.Metrics.EnablePeerHost {
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metrics.PeerHostTraffic.WithLabelValues(peer.Tag, metrics.PeerHostTrafficDownloadType, peer.Host.ID, peer.Host.IP).Add(float64(piece.PieceInfo.RangeSize))
|
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if parent, ok := s.resource.PeerManager().Load(piece.DstPid); ok {
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metrics.PeerHostTraffic.WithLabelValues(peer.Tag, metrics.PeerHostTrafficUploadType, parent.Host.ID, parent.Host.IP).Add(float64(piece.PieceInfo.RangeSize))
|
||
} else {
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||
peer.Log.Warnf("dst peer %s not found for piece %#v %#v", piece.DstPid, piece, piece.PieceInfo)
|
||
}
|
||
}
|
||
|
||
// Collect traffic metrics.
|
||
if piece.DstPid != "" {
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metrics.Traffic.WithLabelValues(peer.Tag, metrics.TrafficP2PType).Add(float64(piece.PieceInfo.RangeSize))
|
||
} else {
|
||
metrics.Traffic.WithLabelValues(peer.Tag, metrics.TrafficBackToSourceType).Add(float64(piece.PieceInfo.RangeSize))
|
||
}
|
||
continue
|
||
}
|
||
|
||
// Handle piece download code.
|
||
if piece.Code != base.Code_Success {
|
||
if piece.Code == base.Code_ClientWaitPieceReady {
|
||
peer.Log.Debugf("receive piece code %d and wait for dfdaemon piece ready", piece.Code)
|
||
continue
|
||
}
|
||
|
||
// Handle piece download failed.
|
||
peer.Log.Errorf("receive failed piece: %#v", piece)
|
||
s.handlePieceFail(ctx, peer, piece)
|
||
continue
|
||
}
|
||
|
||
peer.Log.Warnf("receive unknow piece: %#v %#v", piece, piece.PieceInfo)
|
||
}
|
||
}
|
||
|
||
// ReportPeerResult handles peer result reported by dfdaemon.
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||
func (s *Service) ReportPeerResult(ctx context.Context, req *rpcscheduler.PeerResult) error {
|
||
peer, ok := s.resource.PeerManager().Load(req.PeerId)
|
||
if !ok {
|
||
msg := fmt.Sprintf("report peer result and peer %s is not exists", req.PeerId)
|
||
logger.Error(msg)
|
||
return dferrors.New(base.Code_SchedPeerNotFound, msg)
|
||
}
|
||
metrics.DownloadCount.WithLabelValues(peer.Tag).Inc()
|
||
|
||
if !req.Success {
|
||
peer.Log.Errorf("report peer failed result: %s %#v", req.Code, req)
|
||
if peer.FSM.Is(resource.PeerStateBackToSource) {
|
||
s.createRecord(peer, storage.PeerStateBackToSourceFailed, req)
|
||
metrics.DownloadFailureCount.WithLabelValues(peer.Tag, metrics.DownloadFailureBackToSourceType).Inc()
|
||
|
||
s.handleTaskFail(ctx, peer.Task, req.GetSourceError(), nil)
|
||
s.handlePeerFail(ctx, peer)
|
||
return nil
|
||
}
|
||
|
||
s.createRecord(peer, storage.PeerStateFailed, req)
|
||
metrics.DownloadFailureCount.WithLabelValues(peer.Tag, metrics.DownloadFailureP2PType).Inc()
|
||
|
||
s.handlePeerFail(ctx, peer)
|
||
return nil
|
||
}
|
||
metrics.PeerTaskDownloadDuration.WithLabelValues(peer.Tag).Observe(float64(req.Cost))
|
||
|
||
peer.Log.Infof("report peer result: %#v", req)
|
||
if peer.FSM.Is(resource.PeerStateBackToSource) {
|
||
s.createRecord(peer, storage.PeerStateBackToSourceSucceeded, req)
|
||
s.handleTaskSuccess(ctx, peer.Task, req)
|
||
s.handlePeerSuccess(ctx, peer)
|
||
return nil
|
||
}
|
||
|
||
s.createRecord(peer, storage.PeerStateSucceeded, req)
|
||
s.handlePeerSuccess(ctx, peer)
|
||
return nil
|
||
}
|
||
|
||
// StatTask checks the current state of the task.
|
||
func (s *Service) StatTask(ctx context.Context, req *rpcscheduler.StatTaskRequest) (*rpcscheduler.Task, error) {
|
||
task, loaded := s.resource.TaskManager().Load(req.TaskId)
|
||
if !loaded {
|
||
msg := fmt.Sprintf("task %s not found", req.TaskId)
|
||
logger.Info(msg)
|
||
return nil, dferrors.New(base.Code_PeerTaskNotFound, msg)
|
||
}
|
||
|
||
task.Log.Debug("task has been found")
|
||
return &rpcscheduler.Task{
|
||
Id: task.ID,
|
||
Type: task.Type,
|
||
ContentLength: task.ContentLength.Load(),
|
||
TotalPieceCount: task.TotalPieceCount.Load(),
|
||
State: task.FSM.Current(),
|
||
PeerCount: int32(task.PeerCount()),
|
||
HasAvailablePeer: task.HasAvailablePeer(),
|
||
}, nil
|
||
}
|
||
|
||
// AnnounceTask informs scheduler a peer has completed task.
|
||
func (s *Service) AnnounceTask(ctx context.Context, req *rpcscheduler.AnnounceTaskRequest) error {
|
||
taskID := req.TaskId
|
||
peerID := req.PiecePacket.DstPid
|
||
|
||
task := resource.NewTask(taskID, req.Url, req.TaskType, req.UrlMeta)
|
||
task, _ = s.resource.TaskManager().LoadOrStore(task)
|
||
host := s.registerHost(ctx, req.PeerHost)
|
||
peer := s.registerPeer(ctx, peerID, task, host, req.UrlMeta.Tag)
|
||
peer.Log.Infof("announce peer task request: %#v %#v %#v %#v", req, req.UrlMeta, req.PeerHost, req.PiecePacket)
|
||
|
||
// If the task state is not TaskStateSucceeded,
|
||
// advance the task state to TaskStateSucceeded.
|
||
if !task.FSM.Is(resource.TaskStateSucceeded) {
|
||
if task.FSM.Can(resource.TaskEventDownload) {
|
||
if err := task.FSM.Event(resource.TaskEventDownload); err != nil {
|
||
msg := fmt.Sprintf("task fsm event failed: %s", err.Error())
|
||
peer.Log.Error(msg)
|
||
return dferrors.New(base.Code_SchedError, msg)
|
||
}
|
||
}
|
||
|
||
// Load downloaded piece infos.
|
||
for _, pieceInfo := range req.PiecePacket.PieceInfos {
|
||
peer.Pieces.Set(uint(pieceInfo.PieceNum))
|
||
peer.AppendPieceCost(int64(pieceInfo.DownloadCost) * int64(time.Millisecond))
|
||
task.StorePiece(pieceInfo)
|
||
}
|
||
|
||
s.handleTaskSuccess(ctx, task, &rpcscheduler.PeerResult{
|
||
TotalPieceCount: req.PiecePacket.TotalPiece,
|
||
ContentLength: req.PiecePacket.ContentLength,
|
||
})
|
||
}
|
||
|
||
// If the peer state is not PeerStateSucceeded,
|
||
// advance the peer state to PeerStateSucceeded.
|
||
if !peer.FSM.Is(resource.PeerStateSucceeded) {
|
||
if peer.FSM.Is(resource.PeerStatePending) {
|
||
if err := peer.FSM.Event(resource.PeerEventRegisterNormal); err != nil {
|
||
msg := fmt.Sprintf("peer fsm event failed: %s", err.Error())
|
||
peer.Log.Error(msg)
|
||
return dferrors.New(base.Code_SchedError, msg)
|
||
}
|
||
}
|
||
|
||
if peer.FSM.Is(resource.PeerStateReceivedTiny) ||
|
||
peer.FSM.Is(resource.PeerStateReceivedSmall) ||
|
||
peer.FSM.Is(resource.PeerStateReceivedNormal) {
|
||
if err := peer.FSM.Event(resource.PeerEventDownload); err != nil {
|
||
msg := fmt.Sprintf("peer fsm event failed: %s", err.Error())
|
||
peer.Log.Error(msg)
|
||
return dferrors.New(base.Code_SchedError, msg)
|
||
}
|
||
|
||
s.handlePeerSuccess(ctx, peer)
|
||
}
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
// LeaveTask makes the peer unschedulable.
|
||
func (s *Service) LeaveTask(ctx context.Context, req *rpcscheduler.PeerTarget) error {
|
||
peer, ok := s.resource.PeerManager().Load(req.PeerId)
|
||
if !ok {
|
||
msg := fmt.Sprintf("leave task and peer %s is not exists", req.PeerId)
|
||
logger.Error(msg)
|
||
return dferrors.New(base.Code_SchedPeerNotFound, msg)
|
||
}
|
||
metrics.LeaveTaskCount.WithLabelValues(peer.Tag).Inc()
|
||
|
||
peer.Log.Infof("leave task: %#v", req)
|
||
if err := peer.FSM.Event(resource.PeerEventLeave); err != nil {
|
||
metrics.LeaveTaskFailureCount.WithLabelValues(peer.Tag).Inc()
|
||
|
||
msg := fmt.Sprintf("peer fsm event failed: %s", err.Error())
|
||
peer.Log.Error(msg)
|
||
return dferrors.New(base.Code_SchedTaskStatusError, msg)
|
||
}
|
||
|
||
// Reschedule a new parent to children of peer to exclude the current leave peer.
|
||
for _, child := range peer.Children() {
|
||
child.Log.Infof("schedule parent because of parent peer %s is leaving", peer.ID)
|
||
s.scheduler.ScheduleParent(ctx, child, child.BlockPeers)
|
||
}
|
||
|
||
s.resource.PeerManager().Delete(peer.ID)
|
||
return nil
|
||
}
|
||
|
||
// registerTask creates a new task or reuses a previous task.
|
||
func (s *Service) registerTask(ctx context.Context, req *rpcscheduler.PeerTaskRequest) (*resource.Task, bool, error) {
|
||
task := resource.NewTask(req.TaskId, req.Url, base.TaskType_Normal, req.UrlMeta, resource.WithBackToSourceLimit(int32(s.config.Scheduler.BackSourceCount)))
|
||
task, loaded := s.resource.TaskManager().LoadOrStore(task)
|
||
if loaded && !task.FSM.Is(resource.TaskStateFailed) {
|
||
task.Log.Infof("task state is %s", task.FSM.Current())
|
||
return task, false, nil
|
||
}
|
||
|
||
// Trigger task.
|
||
if err := task.FSM.Event(resource.TaskEventDownload); err != nil {
|
||
return nil, false, err
|
||
}
|
||
|
||
// Seed peer registers the task, then it needs to back-to-source.
|
||
host, loaded := s.resource.HostManager().Load(req.PeerHost.Id)
|
||
if loaded && host.Type != resource.HostTypeNormal {
|
||
return task, true, nil
|
||
}
|
||
|
||
// Start trigger seed peer task.
|
||
if s.config.SeedPeer.Enable {
|
||
if task.IsSeedPeerFailed() {
|
||
return task, true, nil
|
||
}
|
||
|
||
go s.triggerSeedPeerTask(ctx, task)
|
||
return task, false, nil
|
||
}
|
||
|
||
// Task need to back-to-source.
|
||
return task, true, nil
|
||
}
|
||
|
||
// registerHost creates a new host or reuses a previous host.
|
||
func (s *Service) registerHost(ctx context.Context, rawHost *rpcscheduler.PeerHost) *resource.Host {
|
||
host, ok := s.resource.HostManager().Load(rawHost.Id)
|
||
if !ok {
|
||
// Get scheduler cluster client config by manager.
|
||
var options []resource.HostOption
|
||
if clientConfig, ok := s.dynconfig.GetSchedulerClusterClientConfig(); ok && clientConfig.LoadLimit > 0 {
|
||
options = append(options, resource.WithUploadLoadLimit(int32(clientConfig.LoadLimit)))
|
||
}
|
||
|
||
host = resource.NewHost(rawHost, options...)
|
||
s.resource.HostManager().Store(host)
|
||
host.Log.Info("create new host")
|
||
return host
|
||
}
|
||
|
||
host.Log.Info("host already exists")
|
||
return host
|
||
}
|
||
|
||
// registerPeer creates a new peer or reuses a previous peer.
|
||
func (s *Service) registerPeer(ctx context.Context, peerID string, task *resource.Task, host *resource.Host, tag string) *resource.Peer {
|
||
var options []resource.PeerOption
|
||
if tag != "" {
|
||
options = append(options, resource.WithTag(tag))
|
||
}
|
||
|
||
peer, loaded := s.resource.PeerManager().LoadOrStore(resource.NewPeer(peerID, task, host, options...))
|
||
if !loaded {
|
||
peer.Log.Info("create new peer")
|
||
return peer
|
||
}
|
||
|
||
peer.Log.Infof("peer already exists, state %s", peer.FSM.Current())
|
||
return peer
|
||
}
|
||
|
||
// triggerSeedPeerTask starts to trigger seed peer task.
|
||
func (s *Service) triggerSeedPeerTask(ctx context.Context, task *resource.Task) {
|
||
task.Log.Infof("trigger seed peer download task and task status is %s", task.FSM.Current())
|
||
peer, endOfPiece, err := s.resource.SeedPeer().TriggerTask(
|
||
trace.ContextWithSpanContext(context.Background(), trace.SpanContextFromContext(ctx)), task)
|
||
if err != nil {
|
||
task.Log.Errorf("trigger seed peer download task failed: %s", err.Error())
|
||
s.handleTaskFail(ctx, task, nil, err)
|
||
return
|
||
}
|
||
|
||
// Update the task status first to help peer scheduling evaluation and scoring.
|
||
peer.Log.Info("trigger seed peer download task successfully")
|
||
s.handleTaskSuccess(ctx, task, endOfPiece)
|
||
s.handlePeerSuccess(ctx, peer)
|
||
}
|
||
|
||
// handleBeginOfPiece handles begin of piece.
|
||
func (s *Service) handleBeginOfPiece(ctx context.Context, peer *resource.Peer) {
|
||
switch peer.FSM.Current() {
|
||
case resource.PeerStateBackToSource:
|
||
// Back to the source download process, peer directly returns.
|
||
peer.Log.Info("peer downloads back-to-source when receive the begin of piece")
|
||
return
|
||
case resource.PeerStateReceivedTiny:
|
||
// When the task is tiny,
|
||
// the peer has already returned to piece data when registering.
|
||
peer.Log.Info("file type is tiny, peer has already returned to piece data when registering")
|
||
if err := peer.FSM.Event(resource.PeerEventDownload); err != nil {
|
||
peer.Log.Errorf("peer fsm event failed: %s", err.Error())
|
||
return
|
||
}
|
||
case resource.PeerStateReceivedSmall:
|
||
// When the task is small,
|
||
// the peer has already returned to the parent when registering.
|
||
peer.Log.Info("file type is small, peer has already returned to the parent when registering")
|
||
if err := peer.FSM.Event(resource.PeerEventDownload); err != nil {
|
||
peer.Log.Errorf("peer fsm event failed: %s", err.Error())
|
||
return
|
||
}
|
||
case resource.PeerStateReceivedNormal:
|
||
if err := peer.FSM.Event(resource.PeerEventDownload); err != nil {
|
||
peer.Log.Errorf("peer fsm event failed: %s", err.Error())
|
||
return
|
||
}
|
||
|
||
peer.Log.Infof("schedule parent because of peer receive begin of piece")
|
||
s.scheduler.ScheduleParent(ctx, peer, set.NewSafeSet[string]())
|
||
default:
|
||
peer.Log.Warnf("peer state is %s when receive the begin of piece", peer.FSM.Current())
|
||
}
|
||
}
|
||
|
||
// handleEndOfPiece handles end of piece.
|
||
func (s *Service) handleEndOfPiece(ctx context.Context, peer *resource.Peer) {}
|
||
|
||
// handlePieceSuccess handles successful piece.
|
||
func (s *Service) handlePieceSuccess(ctx context.Context, peer *resource.Peer, piece *rpcscheduler.PieceResult) {
|
||
// Update peer piece info
|
||
peer.Pieces.Set(uint(piece.PieceInfo.PieceNum))
|
||
peer.AppendPieceCost(pkgtime.SubNano(int64(piece.EndTime), int64(piece.BeginTime)).Milliseconds())
|
||
|
||
// When the peer downloads back-to-source,
|
||
// piece downloads successfully updates the task piece info.
|
||
if peer.FSM.Is(resource.PeerStateBackToSource) {
|
||
peer.Task.StorePiece(piece.PieceInfo)
|
||
}
|
||
}
|
||
|
||
// handlePieceFail handles failed piece.
|
||
func (s *Service) handlePieceFail(ctx context.Context, peer *resource.Peer, piece *rpcscheduler.PieceResult) {
|
||
// Failed to download piece back-to-source.
|
||
if peer.FSM.Is(resource.PeerStateBackToSource) {
|
||
return
|
||
}
|
||
|
||
// If parent can not found, reschedule parent.
|
||
parent, ok := s.resource.PeerManager().Load(piece.DstPid)
|
||
if !ok {
|
||
peer.Log.Errorf("schedule parent because of peer can not found parent %s", piece.DstPid)
|
||
peer.BlockPeers.Add(piece.DstPid)
|
||
s.scheduler.ScheduleParent(ctx, peer, peer.BlockPeers)
|
||
return
|
||
}
|
||
|
||
// It’s not a case of back-to-source downloading failed,
|
||
// to help peer to reschedule the parent node.
|
||
switch piece.Code {
|
||
case base.Code_PeerTaskNotFound:
|
||
if err := parent.FSM.Event(resource.PeerEventDownloadFailed); err != nil {
|
||
peer.Log.Errorf("peer fsm event failed: %s", err.Error())
|
||
break
|
||
}
|
||
case base.Code_ClientPieceNotFound:
|
||
// Dfdaemon downloading piece data from parent returns http error code 404.
|
||
// If the parent is not a seed peer, reschedule parent for peer.
|
||
// If the parent is a seed peer, scheduler need to trigger seed peer to download again.
|
||
if parent.Host.Type == resource.HostTypeNormal {
|
||
peer.Log.Infof("parent %s host type is normal", piece.DstPid)
|
||
break
|
||
}
|
||
|
||
peer.Log.Infof("parent %s is seed peer", piece.DstPid)
|
||
s.handleLegacySeedPeer(ctx, parent)
|
||
|
||
// Start trigger seed peer task.
|
||
if s.config.SeedPeer.Enable {
|
||
go s.triggerSeedPeerTask(ctx, parent.Task)
|
||
}
|
||
default:
|
||
}
|
||
|
||
// Peer state is PeerStateRunning will be rescheduled.
|
||
if !peer.FSM.Is(resource.PeerStateRunning) {
|
||
peer.Log.Infof("peer can not be rescheduled because peer state is %s", peer.FSM.Current())
|
||
return
|
||
}
|
||
|
||
peer.Log.Infof("schedule parent because of peer receive failed piece")
|
||
peer.BlockPeers.Add(parent.ID)
|
||
s.scheduler.ScheduleParent(ctx, peer, peer.BlockPeers)
|
||
}
|
||
|
||
// handlePeerSuccess handles successful peer.
|
||
func (s *Service) handlePeerSuccess(ctx context.Context, peer *resource.Peer) {
|
||
if err := peer.FSM.Event(resource.PeerEventDownloadSucceeded); err != nil {
|
||
peer.Log.Errorf("peer fsm event failed: %s", err.Error())
|
||
return
|
||
}
|
||
|
||
sizeScope, err := peer.Task.SizeScope()
|
||
if err != nil {
|
||
peer.Log.Errorf("get task size scope failed: %s", err.Error())
|
||
return
|
||
}
|
||
|
||
// If the peer type is tiny and back-to-source,
|
||
// it need to directly download the tiny file and store the data in task DirectPiece.
|
||
if sizeScope == base.SizeScope_TINY && len(peer.Task.DirectPiece) == 0 {
|
||
data, err := peer.DownloadTinyFile()
|
||
if err != nil {
|
||
peer.Log.Errorf("download tiny task failed: %s", err.Error())
|
||
return
|
||
}
|
||
|
||
if len(data) != int(peer.Task.ContentLength.Load()) {
|
||
peer.Log.Errorf("download tiny task length of data is %d, task content length is %d", len(data), peer.Task.ContentLength.Load())
|
||
return
|
||
}
|
||
|
||
// Tiny file downloaded successfully.
|
||
peer.Task.DirectPiece = data
|
||
}
|
||
}
|
||
|
||
// handlePeerFail handles failed peer.
|
||
func (s *Service) handlePeerFail(ctx context.Context, peer *resource.Peer) {
|
||
if err := peer.FSM.Event(resource.PeerEventDownloadFailed); err != nil {
|
||
peer.Log.Errorf("peer fsm event failed: %s", err.Error())
|
||
return
|
||
}
|
||
|
||
// Reschedule a new parent to children of peer to exclude the current failed peer.
|
||
for _, child := range peer.Children() {
|
||
child.Log.Infof("schedule parent because of parent peer %s is failed", peer.ID)
|
||
s.scheduler.ScheduleParent(ctx, child, child.BlockPeers)
|
||
}
|
||
}
|
||
|
||
// handleLegacySeedPeer handles seed server's task has left,
|
||
// but did not notify the schduler to leave the task.
|
||
func (s *Service) handleLegacySeedPeer(ctx context.Context, peer *resource.Peer) {
|
||
if err := peer.FSM.Event(resource.PeerEventLeave); err != nil {
|
||
peer.Log.Errorf("peer fsm event failed: %s", err.Error())
|
||
return
|
||
}
|
||
|
||
// Reschedule a new parent to children of peer to exclude the current failed peer.
|
||
for _, child := range peer.Children() {
|
||
child.Log.Infof("schedule parent because of parent peer %s is failed", peer.ID)
|
||
s.scheduler.ScheduleParent(ctx, child, child.BlockPeers)
|
||
}
|
||
|
||
s.resource.PeerManager().Delete(peer.ID)
|
||
}
|
||
|
||
// Conditions for the task to switch to the TaskStateSucceeded are:
|
||
// 1. Seed peer downloads the resource successfully.
|
||
// 2. Dfdaemon back-to-source to download successfully.
|
||
// 3. Peer announces it has the task.
|
||
func (s *Service) handleTaskSuccess(ctx context.Context, task *resource.Task, result *rpcscheduler.PeerResult) {
|
||
if task.FSM.Is(resource.TaskStateSucceeded) {
|
||
return
|
||
}
|
||
|
||
if err := task.FSM.Event(resource.TaskEventDownloadSucceeded); err != nil {
|
||
task.Log.Errorf("task fsm event failed: %s", err.Error())
|
||
return
|
||
}
|
||
|
||
// Update task's resource total piece count and content length.
|
||
task.TotalPieceCount.Store(result.TotalPieceCount)
|
||
task.ContentLength.Store(result.ContentLength)
|
||
}
|
||
|
||
// Conditions for the task to switch to the TaskStateSucceeded are:
|
||
// 1. Seed peer downloads the resource falied.
|
||
// 2. Dfdaemon back-to-source to download failed.
|
||
func (s *Service) handleTaskFail(ctx context.Context, task *resource.Task, backToSourceErr *errordetails.SourceError, seedPeerErr error) {
|
||
// If peer back-to-source fails due to an unrecoverable error,
|
||
// notify other peers of the failure,
|
||
// and return the source metadata to peer.
|
||
if backToSourceErr != nil {
|
||
if !backToSourceErr.Temporary {
|
||
task.NotifyPeers(&rpcscheduler.PeerPacket{
|
||
Code: base.Code_BackToSourceAborted,
|
||
ErrorDetail: &rpcscheduler.PeerPacket_SourceError{
|
||
SourceError: backToSourceErr,
|
||
},
|
||
}, resource.PeerEventDownloadFailed)
|
||
task.PeerFailedCount.Store(0)
|
||
}
|
||
} else if seedPeerErr != nil {
|
||
// If seed peer back-to-source fails due to an unrecoverable error,
|
||
// notify other peers of the failure,
|
||
// and return the source metadata to peer.
|
||
if st, ok := status.FromError(seedPeerErr); ok {
|
||
for _, detail := range st.Details() {
|
||
switch d := detail.(type) {
|
||
case *errordetails.SourceError:
|
||
if !d.Temporary {
|
||
task.NotifyPeers(&rpcscheduler.PeerPacket{
|
||
Code: base.Code_BackToSourceAborted,
|
||
ErrorDetail: &rpcscheduler.PeerPacket_SourceError{
|
||
SourceError: d,
|
||
},
|
||
}, resource.PeerEventDownloadFailed)
|
||
task.PeerFailedCount.Store(0)
|
||
}
|
||
}
|
||
}
|
||
}
|
||
} else if task.PeerFailedCount.Load() > resource.FailedPeerCountLimit {
|
||
// If the number of failed peers in the task is greater than FailedPeerCountLimit,
|
||
// then scheduler notifies running peers of failure.
|
||
task.NotifyPeers(&rpcscheduler.PeerPacket{
|
||
Code: base.Code_SchedTaskStatusError,
|
||
}, resource.PeerEventDownloadFailed)
|
||
task.PeerFailedCount.Store(0)
|
||
}
|
||
|
||
if task.FSM.Is(resource.TaskStateFailed) {
|
||
return
|
||
}
|
||
|
||
if err := task.FSM.Event(resource.TaskEventDownloadFailed); err != nil {
|
||
task.Log.Errorf("task fsm event failed: %s", err.Error())
|
||
return
|
||
}
|
||
}
|
||
|
||
// createRecord stores peer download records.
|
||
func (s *Service) createRecord(peer *resource.Peer, peerState int, req *rpcscheduler.PeerResult) {
|
||
record := storage.Record{
|
||
ID: peer.ID,
|
||
IP: peer.Host.IP,
|
||
Hostname: peer.Host.Hostname,
|
||
Tag: peer.Tag,
|
||
Cost: req.Cost,
|
||
PieceCount: int32(peer.Pieces.Count()),
|
||
TotalPieceCount: peer.Task.TotalPieceCount.Load(),
|
||
ContentLength: peer.Task.ContentLength.Load(),
|
||
SecurityDomain: peer.Host.SecurityDomain,
|
||
IDC: peer.Host.IDC,
|
||
NetTopology: peer.Host.NetTopology,
|
||
Location: peer.Host.Location,
|
||
FreeUploadLoad: peer.Host.FreeUploadLoad(),
|
||
State: peerState,
|
||
HostType: int(peer.Host.Type),
|
||
CreateAt: peer.CreateAt.Load().UnixNano(),
|
||
UpdateAt: peer.UpdateAt.Load().UnixNano(),
|
||
}
|
||
|
||
if err := s.storage.Create(record); err != nil {
|
||
peer.Log.Error(err)
|
||
}
|
||
}
|