-
Notifications
You must be signed in to change notification settings - Fork 1.3k
/
peermgr.go
212 lines (172 loc) · 4.56 KB
/
peermgr.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
package peermgr
import (
"context"
"sync"
"time"
"github.com/filecoin-project/lotus/build"
"github.com/filecoin-project/lotus/metrics"
"github.com/filecoin-project/lotus/node/modules/dtypes"
"go.opencensus.io/stats"
"go.uber.org/fx"
"go.uber.org/multierr"
"golang.org/x/xerrors"
"github.com/libp2p/go-libp2p-core/event"
host "github.com/libp2p/go-libp2p-core/host"
net "github.com/libp2p/go-libp2p-core/network"
peer "github.com/libp2p/go-libp2p-core/peer"
dht "github.com/libp2p/go-libp2p-kad-dht"
logging "github.com/ipfs/go-log/v2"
)
var log = logging.Logger("peermgr")
const (
MaxFilPeers = 32
MinFilPeers = 12
)
type MaybePeerMgr struct {
fx.In
Mgr *PeerMgr `optional:"true"`
}
type PeerMgr struct {
bootstrappers []peer.AddrInfo
// peerLeads is a set of peers we hear about through the network
// and who may be good peers to connect to for expanding our peer set
//peerLeads map[peer.ID]time.Time // TODO: unused
peersLk sync.Mutex
peers map[peer.ID]time.Duration
maxFilPeers int
minFilPeers int
expanding chan struct{}
h host.Host
dht *dht.IpfsDHT
notifee *net.NotifyBundle
filPeerEmitter event.Emitter
done chan struct{}
}
type NewFilPeer struct {
Id peer.ID
}
func NewPeerMgr(lc fx.Lifecycle, h host.Host, dht *dht.IpfsDHT, bootstrap dtypes.BootstrapPeers) (*PeerMgr, error) {
pm := &PeerMgr{
h: h,
dht: dht,
bootstrappers: bootstrap,
peers: make(map[peer.ID]time.Duration),
expanding: make(chan struct{}, 1),
maxFilPeers: MaxFilPeers,
minFilPeers: MinFilPeers,
done: make(chan struct{}),
}
emitter, err := h.EventBus().Emitter(new(NewFilPeer))
if err != nil {
return nil, xerrors.Errorf("creating NewFilPeer emitter: %w", err)
}
pm.filPeerEmitter = emitter
lc.Append(fx.Hook{
OnStop: func(ctx context.Context) error {
return multierr.Combine(
pm.filPeerEmitter.Close(),
pm.Stop(ctx),
)
},
})
pm.notifee = &net.NotifyBundle{
DisconnectedF: func(_ net.Network, c net.Conn) {
pm.Disconnect(c.RemotePeer())
},
}
h.Network().Notify(pm.notifee)
return pm, nil
}
func (pmgr *PeerMgr) AddFilecoinPeer(p peer.ID) {
_ = pmgr.filPeerEmitter.Emit(NewFilPeer{Id: p}) //nolint:errcheck
pmgr.peersLk.Lock()
defer pmgr.peersLk.Unlock()
pmgr.peers[p] = time.Duration(0)
}
func (pmgr *PeerMgr) GetPeerLatency(p peer.ID) (time.Duration, bool) {
pmgr.peersLk.Lock()
defer pmgr.peersLk.Unlock()
dur, ok := pmgr.peers[p]
return dur, ok
}
func (pmgr *PeerMgr) SetPeerLatency(p peer.ID, latency time.Duration) {
pmgr.peersLk.Lock()
defer pmgr.peersLk.Unlock()
if _, ok := pmgr.peers[p]; ok {
pmgr.peers[p] = latency
}
}
func (pmgr *PeerMgr) Disconnect(p peer.ID) {
if pmgr.h.Network().Connectedness(p) == net.NotConnected {
pmgr.peersLk.Lock()
defer pmgr.peersLk.Unlock()
delete(pmgr.peers, p)
}
}
func (pmgr *PeerMgr) Stop(ctx context.Context) error {
log.Warn("closing peermgr done")
close(pmgr.done)
return nil
}
func (pmgr *PeerMgr) Run(ctx context.Context) {
tick := build.Clock.Ticker(time.Second * 5)
for {
select {
case <-tick.C:
pcount := pmgr.getPeerCount()
if pcount < pmgr.minFilPeers {
pmgr.expandPeers()
} else if pcount > pmgr.maxFilPeers {
log.Debugf("peer count about threshold: %d > %d", pcount, pmgr.maxFilPeers)
}
stats.Record(ctx, metrics.PeerCount.M(int64(pmgr.getPeerCount())))
case <-pmgr.done:
log.Warn("exiting peermgr run")
return
}
}
}
func (pmgr *PeerMgr) getPeerCount() int {
pmgr.peersLk.Lock()
defer pmgr.peersLk.Unlock()
return len(pmgr.peers)
}
func (pmgr *PeerMgr) expandPeers() {
select {
case pmgr.expanding <- struct{}{}:
default:
return
}
go func() {
ctx, cancel := context.WithTimeout(context.TODO(), time.Second*30)
defer cancel()
pmgr.doExpand(ctx)
<-pmgr.expanding
}()
}
func (pmgr *PeerMgr) doExpand(ctx context.Context) {
pcount := pmgr.getPeerCount()
if pcount == 0 {
if len(pmgr.bootstrappers) == 0 {
log.Warn("no peers connected, and no bootstrappers configured")
return
}
log.Info("connecting to bootstrap peers")
wg := sync.WaitGroup{}
for _, bsp := range pmgr.bootstrappers {
wg.Add(1)
go func(bsp peer.AddrInfo) {
defer wg.Done()
if err := pmgr.h.Connect(ctx, bsp); err != nil {
log.Warnf("failed to connect to bootstrap peer: %s", err)
}
}(bsp)
}
wg.Wait()
return
}
// if we already have some peers and need more, the dht is really good at connecting to most peers. Use that for now until something better comes along.
if err := pmgr.dht.Bootstrap(ctx); err != nil {
log.Warnf("dht bootstrapping failed: %s", err)
}
}