-
Notifications
You must be signed in to change notification settings - Fork 262
/
peer_manager.go
250 lines (207 loc) · 6.65 KB
/
peer_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
/*
* 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.
*/
//go:generate mockgen -destination peer_manager_mock.go -source peer_manager.go -package resource
package resource
import (
"context"
"sync"
"time"
pkggc "d7y.io/dragonfly/v2/pkg/gc"
"d7y.io/dragonfly/v2/scheduler/config"
)
const (
// GC peer id.
GCPeerID = "peer"
)
// PeerManager is the interface used for peer manager.
type PeerManager interface {
// Load returns peer for a key.
Load(string) (*Peer, bool)
// Store sets peer.
Store(*Peer)
// LoadOrStore returns peer the key if present.
// Otherwise, it stores and returns the given peer.
// The loaded result is true if the peer was loaded, false if stored.
LoadOrStore(*Peer) (*Peer, bool)
// Delete deletes peer for a key.
Delete(string)
// Range calls f sequentially for each key and value present in the map.
// If f returns false, range stops the iteration.
Range(f func(any, any) bool)
// Try to reclaim peer.
RunGC() error
}
// peerManager contains content for peer manager.
type peerManager struct {
// Peer sync map.
*sync.Map
// peerTTL is time to live of peer.
peerTTL time.Duration
// hostTTL is time to live of host.
hostTTL time.Duration
// pieceDownloadTimeout is timeout of downloading piece.
pieceDownloadTimeout time.Duration
// mu is peer mutex.
mu *sync.Mutex
}
// New peer manager interface.
func newPeerManager(cfg *config.GCConfig, gc pkggc.GC) (PeerManager, error) {
p := &peerManager{
Map: &sync.Map{},
peerTTL: cfg.PeerTTL,
hostTTL: cfg.HostTTL,
pieceDownloadTimeout: cfg.PieceDownloadTimeout,
mu: &sync.Mutex{},
}
if err := gc.Add(pkggc.Task{
ID: GCPeerID,
Interval: cfg.PeerGCInterval,
Timeout: cfg.PeerGCInterval,
Runner: p,
}); err != nil {
return nil, err
}
return p, nil
}
// Load returns peer for a key.
func (p *peerManager) Load(key string) (*Peer, bool) {
rawPeer, loaded := p.Map.Load(key)
if !loaded {
return nil, false
}
return rawPeer.(*Peer), loaded
}
// Store sets peer.
func (p *peerManager) Store(peer *Peer) {
p.mu.Lock()
defer p.mu.Unlock()
p.Map.Store(peer.ID, peer)
peer.Task.StorePeer(peer)
peer.Host.StorePeer(peer)
}
// LoadOrStore returns peer the key if present.
// Otherwise, it stores and returns the given peer.
// The loaded result is true if the peer was loaded, false if stored.
func (p *peerManager) LoadOrStore(peer *Peer) (*Peer, bool) {
p.mu.Lock()
defer p.mu.Unlock()
rawPeer, loaded := p.Map.LoadOrStore(peer.ID, peer)
if !loaded {
peer.Host.StorePeer(peer)
peer.Task.StorePeer(peer)
}
return rawPeer.(*Peer), loaded
}
// Delete deletes peer for a key.
func (p *peerManager) Delete(key string) {
p.mu.Lock()
defer p.mu.Unlock()
if peer, loaded := p.Load(key); loaded {
p.Map.Delete(key)
peer.Task.DeletePeer(key)
peer.Host.DeletePeer(key)
}
}
// Range calls f sequentially for each key and value present in the map.
// If f returns false, range stops the iteration.
func (p *peerManager) Range(f func(key, value any) bool) {
p.Map.Range(f)
}
// Try to reclaim peer.
func (p *peerManager) RunGC() error {
p.Map.Range(func(_, value any) bool {
peer, ok := value.(*Peer)
if !ok {
peer.Log.Warn("invalid peer")
return true
}
// If the peer state is PeerStateLeave,
// peer will be reclaimed.
if peer.FSM.Is(PeerStateLeave) {
p.Delete(peer.ID)
peer.Log.Info("peer has been reclaimed")
return true
}
// If the peer's elapsed of downloading piece exceeds the pieceDownloadTimeout,
// then sets the peer state to PeerStateLeave and then delete peer.
if peer.FSM.Is(PeerStateRunning) || peer.FSM.Is(PeerStateBackToSource) {
elapsed := time.Since(peer.PieceUpdatedAt.Load())
if elapsed > p.pieceDownloadTimeout {
peer.Log.Info("peer elapsed exceeds the timeout of downloading piece, causing the peer to leave")
if err := peer.FSM.Event(context.Background(), PeerEventLeave); err != nil {
peer.Log.Errorf("peer fsm event failed: %s", err.Error())
return true
}
return true
}
}
// If the peer's elapsed exceeds the peer ttl,
// then set the peer state to PeerStateLeave and then delete peer.
elapsed := time.Since(peer.UpdatedAt.Load())
if elapsed > p.peerTTL {
peer.Log.Info("peer elapsed exceeds the peer ttl, causing the peer to leave")
if err := peer.FSM.Event(context.Background(), PeerEventLeave); err != nil {
peer.Log.Errorf("peer fsm event failed: %s", err.Error())
return true
}
return true
}
// If the host's elapsed exceeds the host ttl,
// then set the peer state to PeerStateLeave and then delete peer.
elapsed = time.Since(peer.Host.UpdatedAt.Load())
if elapsed > p.hostTTL {
peer.Log.Info("peer elapsed exceeds the host ttl, causing the peer to leave")
if err := peer.FSM.Event(context.Background(), PeerEventLeave); err != nil {
peer.Log.Errorf("peer fsm event failed: %s", err.Error())
return true
}
return true
}
// If the peer's state is PeerStateFailed,
// then set the peer state to PeerStateLeave and then delete peer.
if peer.FSM.Is(PeerStateFailed) {
peer.Log.Info("peer state is PeerStateFailed, causing the peer to leave")
if err := peer.FSM.Event(context.Background(), PeerEventLeave); err != nil {
peer.Log.Errorf("peer fsm event failed: %s", err.Error())
return true
}
}
// If no peer exists in the dag of the task,
// delete the peer.
degree, err := peer.Task.PeerDegree(peer.ID)
if err != nil {
p.Delete(peer.ID)
peer.Log.Info("peer has been reclaimed")
return true
}
// If the task dag size exceeds the limit,
// then set the peer state to PeerStateLeave which state is
// PeerStateSucceeded, and degree is zero.
if peer.Task.PeerCount() > PeerCountLimitForTask &&
peer.FSM.Is(PeerStateSucceeded) && degree == 0 {
peer.Log.Info("task dag size exceeds the limit, causing the peer to leave")
if err := peer.FSM.Event(context.Background(), PeerEventLeave); err != nil {
peer.Log.Errorf("peer fsm event failed: %s", err.Error())
return true
}
p.Delete(peer.ID)
peer.Log.Info("peer has been reclaimed")
return true
}
return true
})
return nil
}