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seeder.go
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seeder.go
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/*
* Copyright 2022 The Dragonfly Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package rpcserver
import (
"context"
"fmt"
"math"
"time"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
cdnsystemv1 "d7y.io/api/v2/pkg/apis/cdnsystem/v1"
commonv1 "d7y.io/api/v2/pkg/apis/common/v1"
schedulerv1 "d7y.io/api/v2/pkg/apis/scheduler/v1"
"d7y.io/dragonfly/v2/client/config"
"d7y.io/dragonfly/v2/client/daemon/metrics"
"d7y.io/dragonfly/v2/client/daemon/peer"
logger "d7y.io/dragonfly/v2/internal/dflog"
"d7y.io/dragonfly/v2/pkg/idgen"
"d7y.io/dragonfly/v2/pkg/net/http"
"d7y.io/dragonfly/v2/pkg/rpc/common"
)
type seeder struct {
server *server
}
func (s *seeder) GetPieceTasks(ctx context.Context, request *commonv1.PieceTaskRequest) (*commonv1.PiecePacket, error) {
return s.server.GetPieceTasks(ctx, request)
}
func (s *seeder) SyncPieceTasks(tasksServer cdnsystemv1.Seeder_SyncPieceTasksServer) error {
return s.server.SyncPieceTasks(tasksServer)
}
func (s *seeder) ObtainSeeds(seedRequest *cdnsystemv1.SeedRequest, seedsServer cdnsystemv1.Seeder_ObtainSeedsServer) error {
if logger.IsDebug() {
printAuthInfo(seedsServer.Context())
}
metrics.SeedPeerConcurrentDownloadGauge.Inc()
defer metrics.SeedPeerConcurrentDownloadGauge.Dec()
metrics.SeedPeerDownloadCount.Add(1)
s.server.Keep()
if seedRequest.UrlMeta == nil {
seedRequest.UrlMeta = &commonv1.UrlMeta{}
}
req := peer.SeedTaskRequest{
PeerTaskRequest: schedulerv1.PeerTaskRequest{
Url: seedRequest.Url,
UrlMeta: seedRequest.UrlMeta,
PeerId: idgen.SeedPeerIDV1(s.server.peerHost.Ip), // when reuse peer task, peer id will be replaced.
PeerHost: s.server.peerHost,
IsMigrating: false,
},
Limit: 0,
Range: nil, // following code will update Range
}
log := logger.With("peer", req.PeerId, "task", seedRequest.TaskId, "component", "seedService")
if len(req.UrlMeta.Range) > 0 {
r, err := http.ParseURLMetaRange(req.UrlMeta.Range, math.MaxInt64)
if err != nil {
metrics.SeedPeerDownloadFailureCount.Add(1)
err = fmt.Errorf("parse range %s error: %s", req.UrlMeta.Range, err)
log.Errorf(err.Error())
return err
}
req.Range = &http.Range{
Start: r.Start,
Length: r.Length,
}
}
resp, reuse, err := s.server.peerTaskManager.StartSeedTask(seedsServer.Context(), &req)
if err != nil {
metrics.SeedPeerDownloadFailureCount.Add(1)
log.Errorf("start seed task error: %s", err.Error())
return err
}
if resp.SubscribeResponse.Storage == nil {
metrics.SeedPeerDownloadFailureCount.Add(1)
err = fmt.Errorf("invalid SubscribeResponse.Storage")
log.Errorf("%s", err.Error())
return err
}
if resp.SubscribeResponse.Success == nil && resp.SubscribeResponse.Fail == nil {
metrics.SeedPeerDownloadFailureCount.Add(1)
err = fmt.Errorf("both of SubscribeResponse.Success and SubscribeResponse.Fail is nil")
log.Errorf("%s", err.Error())
return err
}
log.Infof("start seed task")
err = seedsServer.Send(
&cdnsystemv1.PieceSeed{
PeerId: resp.PeerID,
HostId: req.PeerHost.Id,
PieceInfo: &commonv1.PieceInfo{
PieceNum: common.BeginOfPiece,
},
Done: false,
})
if err != nil {
metrics.SeedPeerDownloadFailureCount.Add(1)
resp.Span.RecordError(err)
log.Errorf("send piece seed error: %s", err.Error())
return err
}
sync := seedSynchronizer{
SeedTaskResponse: resp,
SugaredLoggerOnWith: log,
seedsServer: seedsServer,
seedTaskRequest: &req,
startNanoSecond: time.Now().UnixNano(),
}
defer resp.Span.End()
if err := sync.sendPieceSeeds(reuse); err != nil {
metrics.SeedPeerDownloadFailureCount.Add(1)
return err
}
return nil
}
type seedSynchronizer struct {
*peer.SeedTaskResponse
*logger.SugaredLoggerOnWith
seedsServer cdnsystemv1.Seeder_ObtainSeedsServer
seedTaskRequest *peer.SeedTaskRequest
startNanoSecond int64
attributeSent bool
}
func (s *seedSynchronizer) sendPieceSeeds(reuse bool) (err error) {
var (
ctx = s.Context
desired int32
contentLength int64
)
for {
select {
case <-ctx.Done():
err = ctx.Err()
s.Errorf("context done due to %s", err.Error())
s.Span.RecordError(err)
s.Span.SetAttributes(config.AttributeSeedTaskSuccess.Bool(false))
return err
case <-s.Success:
s.Infof("seed task success, send reminding piece seeds")
err = s.sendRemindingPieceSeeds(desired, reuse)
if err != nil {
s.Span.RecordError(err)
s.Span.SetAttributes(config.AttributeSeedTaskSuccess.Bool(false))
} else {
s.Span.SetAttributes(config.AttributeSeedTaskSuccess.Bool(true))
}
return err
case <-s.Fail:
reason := s.FailReason()
s.Errorf("seed task failed: %s", reason)
s.Span.RecordError(err)
s.Span.SetAttributes(config.AttributeSeedTaskSuccess.Bool(false))
// return underlay status to scheduler
if st, ok := status.FromError(reason); ok {
return st.Err()
}
return status.Errorf(codes.Internal, "seed task failed: %s", reason)
case p := <-s.PieceInfoChannel:
s.Infof("receive piece info, num: %d, ordered num: %d, finish: %v", p.Num, p.OrderedNum, p.Finished)
contentLength, desired, err = s.sendOrderedPieceSeeds(desired, p.OrderedNum, p.Finished, reuse)
if err != nil {
s.Span.RecordError(err)
s.Span.SetAttributes(config.AttributeSeedTaskSuccess.Bool(false))
return err
}
if p.Finished {
s.Debugf("send piece seeds finished")
s.Span.SetAttributes(config.AttributeSeedTaskSuccess.Bool(true))
s.updateMetric(reuse, contentLength)
return nil
}
}
}
}
func (s *seedSynchronizer) sendRemindingPieceSeeds(desired int32, reuse bool) error {
for {
pp, err := s.Storage.GetPieces(s.Context,
&commonv1.PieceTaskRequest{
TaskId: s.TaskID,
StartNum: uint32(desired),
Limit: 16,
})
if err != nil {
s.Errorf("get pieces error %s, desired: %d", err.Error(), desired)
return err
}
if !s.attributeSent {
exa, err := s.Storage.GetExtendAttribute(s.Context, nil)
if err != nil {
s.Errorf("get extend attribute error: %s", err.Error())
return err
}
pp.ExtendAttribute = exa
s.attributeSent = true
}
// we must send done to scheduler
if len(pp.PieceInfos) == 0 {
ps := s.compositePieceSeed(pp, nil, reuse)
ps.Done, ps.EndTime = true, uint64(time.Now().UnixNano())
s.Infof("seed tasks start time: %d, end time: %d, cost: %dms", ps.BeginTime, ps.EndTime, (ps.EndTime-ps.BeginTime)/1000000)
err = s.seedsServer.Send(&ps)
if err != nil {
s.Errorf("send reminding piece seeds error: %s", err.Error())
return err
}
}
for _, p := range pp.PieceInfos {
if p.PieceNum != desired {
s.Errorf("desired piece %d, not found", desired)
return status.Errorf(codes.Internal, "seed task piece %d not found", desired)
}
ps := s.compositePieceSeed(pp, p, reuse)
if p.PieceNum == pp.TotalPiece-1 {
ps.Done, ps.EndTime = true, uint64(time.Now().UnixNano())
s.Infof("seed tasks start time: %d, end time: %d, cost: %dms, piece number: %d", ps.BeginTime, ps.EndTime, (ps.EndTime-ps.BeginTime)/1000000, p.PieceNum)
}
err = s.seedsServer.Send(&ps)
if err != nil {
s.Errorf("send reminding piece seeds error: %s", err.Error())
return err
}
s.Span.AddEvent(fmt.Sprintf("send piece %d ok", desired))
desired++
}
if desired == pp.TotalPiece {
s.updateMetric(reuse, pp.ContentLength)
s.Debugf("send reminding piece seeds ok")
return nil
}
}
}
func (s *seedSynchronizer) sendOrderedPieceSeeds(desired, orderedNum int32, finished bool, reuse bool) (int64, int32, error) {
cur := desired
var contentLength int64 = -1
for ; cur <= orderedNum; cur++ {
pp, err := s.Storage.GetPieces(s.Context,
&commonv1.PieceTaskRequest{
TaskId: s.TaskID,
StartNum: uint32(cur),
Limit: 1,
})
if err != nil {
s.Errorf("get pieces error %s, desired: %d", err.Error(), cur)
return -1, -1, err
}
if len(pp.PieceInfos) < 1 {
s.Errorf("desired pieces %d not found", cur)
return -1, -1, fmt.Errorf("get seed piece %d info failed", cur)
}
if !s.attributeSent {
exa, err := s.Storage.GetExtendAttribute(s.Context, nil)
if err != nil {
s.Errorf("get extend attribute error: %s", err.Error())
return -1, -1, err
}
pp.ExtendAttribute = exa
s.attributeSent = true
}
ps := s.compositePieceSeed(pp, pp.PieceInfos[0], reuse)
if cur == orderedNum && finished {
ps.Done, ps.EndTime = true, uint64(time.Now().UnixNano())
s.Infof("seed tasks start time: %d, end time: %d, cost: %dms", ps.BeginTime, ps.EndTime, (ps.EndTime-ps.BeginTime)/1000000)
}
err = s.seedsServer.Send(&ps)
if err != nil {
s.Errorf("send ordered piece seeds error: %s", err.Error())
return -1, -1, err
}
s.Debugf("send piece %d seeds ok", cur)
s.Span.AddEvent(fmt.Sprintf("send piece %d ok", cur))
contentLength = pp.ContentLength
}
return contentLength, cur, nil
}
func (s *seedSynchronizer) compositePieceSeed(pp *commonv1.PiecePacket, piece *commonv1.PieceInfo, reuse bool) cdnsystemv1.PieceSeed {
return cdnsystemv1.PieceSeed{
Reuse: reuse,
PeerId: s.seedTaskRequest.PeerId,
HostId: s.seedTaskRequest.PeerHost.Id,
PieceInfo: piece,
ContentLength: pp.ContentLength,
TotalPieceCount: pp.TotalPiece,
BeginTime: uint64(s.startNanoSecond),
EndTime: uint64(time.Now().UnixNano()),
}
}
func (s *seedSynchronizer) updateMetric(reuse bool, contentLength int64) {
seedPeerDownloadType := metrics.SeedPeerDownloadTypeBackToSource
if reuse {
seedPeerDownloadType = metrics.SeedPeerDownloadTypeP2P
}
if contentLength == -1 {
s.Warnf("seed task content length is unknown, did not update metric")
return
}
metrics.SeedPeerDownloadTraffic.WithLabelValues(seedPeerDownloadType).Add(float64(contentLength))
}