-
Notifications
You must be signed in to change notification settings - Fork 266
/
peertask_manager.go
323 lines (291 loc) · 9.01 KB
/
peertask_manager.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
/*
* Copyright 2020 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 peer
import (
"bytes"
"context"
"fmt"
"io"
"io/ioutil"
"os"
"sync"
"time"
"github.com/go-http-utils/headers"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/trace"
"golang.org/x/time/rate"
"d7y.io/dragonfly/v2/client/clientutil"
"d7y.io/dragonfly/v2/client/config"
"d7y.io/dragonfly/v2/client/daemon/storage"
logger "d7y.io/dragonfly/v2/internal/dflog"
"d7y.io/dragonfly/v2/pkg/rpc/base"
"d7y.io/dragonfly/v2/pkg/rpc/scheduler"
schedulerclient "d7y.io/dragonfly/v2/pkg/rpc/scheduler/client"
)
// TaskManager processes all peer tasks request
type TaskManager interface {
// StartFilePeerTask starts a peer task to download a file
// return a progress channel for request download progress
// tiny stands task file is tiny and task is done
StartFilePeerTask(ctx context.Context, req *FilePeerTaskRequest) (
progress chan *FilePeerTaskProgress, tiny *TinyData, err error)
// StartStreamPeerTask starts a peer task with stream io
// tiny stands task file is tiny and task is done
StartStreamPeerTask(ctx context.Context, req *scheduler.PeerTaskRequest) (
readCloser io.ReadCloser, attribute map[string]string, err error)
IsPeerTaskRunning(pid string) bool
// Stop stops the PeerTaskManager
Stop(ctx context.Context) error
}
// Task represents common interface to operate a peer task
type Task interface {
Context() context.Context
Log() *logger.SugaredLoggerOnWith
ReportPieceResult(result *pieceTaskResult) error
GetPeerID() string
GetTaskID() string
GetTotalPieces() int32
SetTotalPieces(int32)
GetContentLength() int64
// SetContentLength will be called after download completed, when download from source without content length
SetContentLength(int64) error
SetCallback(TaskCallback)
AddTraffic(int64)
GetTraffic() int64
SetPieceMd5Sign(string)
GetPieceMd5Sign() string
}
// TaskCallback inserts some operations for peer task download lifecycle
type TaskCallback interface {
Init(pt Task) error
Done(pt Task) error
Update(pt Task) error
Fail(pt Task, code base.Code, reason string) error
GetStartTime() time.Time
ValidateDigest(pt Task) error
}
type TinyData struct {
// span is used by peer task manager to record events without peer task
span trace.Span
TaskID string
PeerID string
Content []byte
}
var tracer trace.Tracer
func init() {
tracer = otel.Tracer("dfget-daemon")
}
type peerTaskManager struct {
host *scheduler.PeerHost
schedulerClient schedulerclient.SchedulerClient
schedulerOption config.SchedulerOption
pieceManager PieceManager
storageManager storage.Manager
runningPeerTasks sync.Map
perPeerRateLimit rate.Limit
// enableMultiplex indicates reusing completed peer task storage
// currently, only check completed peer task after register to scheduler
// TODO multiplex the running peer task
enableMultiplex bool
calculateDigest bool
}
func NewPeerTaskManager(
host *scheduler.PeerHost,
pieceManager PieceManager,
storageManager storage.Manager,
schedulerClient schedulerclient.SchedulerClient,
schedulerOption config.SchedulerOption,
perPeerRateLimit rate.Limit,
multiplex bool,
calculateDigest bool) (TaskManager, error) {
ptm := &peerTaskManager{
host: host,
runningPeerTasks: sync.Map{},
pieceManager: pieceManager,
storageManager: storageManager,
schedulerClient: schedulerClient,
schedulerOption: schedulerOption,
perPeerRateLimit: perPeerRateLimit,
enableMultiplex: multiplex,
calculateDigest: calculateDigest,
}
return ptm, nil
}
var _ TaskManager = (*peerTaskManager)(nil)
func (ptm *peerTaskManager) StartFilePeerTask(ctx context.Context, req *FilePeerTaskRequest) (chan *FilePeerTaskProgress, *TinyData, error) {
if ptm.enableMultiplex {
progress, ok := ptm.tryReuseFilePeerTask(ctx, req)
if ok {
return progress, nil, nil
}
}
// TODO ensure scheduler is ok first
start := time.Now()
limit := ptm.perPeerRateLimit
if req.Limit > 0 {
limit = rate.Limit(req.Limit)
}
ctx, pt, tiny, err := newFilePeerTask(ctx, ptm.host, ptm.pieceManager,
req, ptm.schedulerClient, ptm.schedulerOption, limit)
if err != nil {
return nil, nil, err
}
// tiny file content is returned by scheduler, just write to output
if tiny != nil {
ptm.storeTinyPeerTask(ctx, tiny)
defer tiny.span.End()
log := logger.With("peer", tiny.PeerID, "task", tiny.TaskID, "component", "peerTaskManager")
_, err = os.Stat(req.Output)
if err == nil {
// remove exist file
log.Infof("destination file %q exists, purge it first", req.Output)
tiny.span.AddEvent("purge exist output")
os.Remove(req.Output)
}
dstFile, err := os.OpenFile(req.Output, os.O_CREATE|os.O_RDWR|os.O_TRUNC, 0644)
if err != nil {
tiny.span.RecordError(err)
tiny.span.SetAttributes(config.AttributePeerTaskSuccess.Bool(false))
log.Errorf("open task destination file error: %s", err)
return nil, nil, err
}
defer dstFile.Close()
n, err := dstFile.Write(tiny.Content)
if err != nil {
tiny.span.RecordError(err)
tiny.span.SetAttributes(config.AttributePeerTaskSuccess.Bool(false))
return nil, nil, err
}
log.Debugf("copied tasks data %d bytes to %s", n, req.Output)
tiny.span.SetAttributes(config.AttributePeerTaskSuccess.Bool(true))
tiny.span.SetAttributes(config.AttributePeerTaskSize.Int(n))
return nil, tiny, nil
}
pt.SetCallback(&filePeerTaskCallback{
ptm: ptm,
pt: pt,
req: req,
start: start,
})
ptm.runningPeerTasks.Store(req.PeerId, pt)
// FIXME when failed due to schedulerClient error, relocate schedulerClient and retry
progress, err := pt.Start(ctx)
return progress, nil, err
}
func (ptm *peerTaskManager) StartStreamPeerTask(ctx context.Context, req *scheduler.PeerTaskRequest) (io.ReadCloser, map[string]string, error) {
if ptm.enableMultiplex {
r, attr, ok := ptm.tryReuseStreamPeerTask(ctx, req)
if ok {
return r, attr, nil
}
}
start := time.Now()
ctx, pt, tiny, err := newStreamPeerTask(ctx, ptm.host, ptm.pieceManager,
req, ptm.schedulerClient, ptm.schedulerOption, ptm.perPeerRateLimit)
if err != nil {
return nil, nil, err
}
// tiny file content is returned by scheduler, just write to output
if tiny != nil {
ptm.storeTinyPeerTask(ctx, tiny)
logger.Infof("copied tasks data %d bytes to buffer", len(tiny.Content))
tiny.span.SetAttributes(config.AttributePeerTaskSuccess.Bool(true))
return ioutil.NopCloser(bytes.NewBuffer(tiny.Content)), map[string]string{
headers.ContentLength: fmt.Sprintf("%d", len(tiny.Content)),
}, nil
}
pt.SetCallback(
&streamPeerTaskCallback{
ptm: ptm,
pt: pt,
req: req,
start: start,
})
ptm.runningPeerTasks.Store(req.PeerId, pt)
// FIXME when failed due to schedulerClient error, relocate schedulerClient and retry
readCloser, attribute, err := pt.Start(ctx)
return readCloser, attribute, err
}
func (ptm *peerTaskManager) Stop(ctx context.Context) error {
// TODO
return nil
}
func (ptm *peerTaskManager) PeerTaskDone(peerID string) {
ptm.runningPeerTasks.Delete(peerID)
}
func (ptm *peerTaskManager) IsPeerTaskRunning(peerID string) bool {
_, ok := ptm.runningPeerTasks.Load(peerID)
return ok
}
func (ptm *peerTaskManager) storeTinyPeerTask(ctx context.Context, tiny *TinyData) {
// TODO store tiny data asynchronous
l := int64(len(tiny.Content))
err := ptm.storageManager.RegisterTask(ctx,
storage.RegisterTaskRequest{
CommonTaskRequest: storage.CommonTaskRequest{
PeerID: tiny.PeerID,
TaskID: tiny.TaskID,
},
ContentLength: l,
TotalPieces: 1,
// TODO check md5 digest
})
if err != nil {
logger.Errorf("register tiny data storage failed: %s", err)
return
}
n, err := ptm.storageManager.WritePiece(ctx,
&storage.WritePieceRequest{
PeerTaskMetaData: storage.PeerTaskMetaData{
PeerID: tiny.PeerID,
TaskID: tiny.TaskID,
},
PieceMetaData: storage.PieceMetaData{
Num: 0,
Md5: "",
Offset: 0,
Range: clientutil.Range{
Start: 0,
Length: l,
},
Style: 0,
},
UnknownLength: false,
Reader: bytes.NewBuffer(tiny.Content),
})
if err != nil {
logger.Errorf("write tiny data storage failed: %s", err)
return
}
if n != l {
logger.Errorf("write tiny data storage failed", n, l)
return
}
err = ptm.storageManager.Store(ctx,
&storage.StoreRequest{
CommonTaskRequest: storage.CommonTaskRequest{
PeerID: tiny.PeerID,
TaskID: tiny.TaskID,
},
MetadataOnly: true,
TotalPieces: 1,
})
if err != nil {
logger.Errorf("store tiny data failed: %s", err)
} else {
logger.Debugf("store tiny data, len: %d", l)
}
}