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lib/connections: Slow down failing listeners

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GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3745
This commit is contained in:
Jakob Borg 2016-11-19 12:37:14 +00:00 committed by Audrius Butkevicius
parent a8a0bc356a
commit 548a324256
1 changed files with 24 additions and 6 deletions
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30
lib/connections/service.go
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@ -59,9 +59,10 @@ type Service struct {
natService *nat.Service natService *nat.Service
natServiceToken *suture.ServiceToken natServiceToken *suture.ServiceToken
listenersMut sync.RWMutex listenersMut sync.RWMutex
listeners map[string]genericListener listeners map[string]genericListener
listenerTokens map[string]suture.ServiceToken listenerTokens map[string]suture.ServiceToken
listenerSupervisor *suture.Supervisor
curConMut sync.Mutex curConMut sync.Mutex
currentConnection map[protocol.DeviceID]Connection currentConnection map[protocol.DeviceID]Connection
@ -71,7 +72,11 @@ func NewService(cfg *config.Wrapper, myID protocol.DeviceID, mdl Model, tlsCfg *
bepProtocolName string, tlsDefaultCommonName string, lans []*net.IPNet) *Service { bepProtocolName string, tlsDefaultCommonName string, lans []*net.IPNet) *Service {
service := &Service{ service := &Service{
Supervisor: suture.NewSimple("connections.Service"), Supervisor: suture.New("connections.Service", suture.Spec{
Log: func(line string) {
l.Infoln(line)
},
}),
cfg: cfg, cfg: cfg,
myID: myID, myID: myID,
model: mdl, model: mdl,
@ -87,6 +92,18 @@ func NewService(cfg *config.Wrapper, myID protocol.DeviceID, mdl Model, tlsCfg *
listeners: make(map[string]genericListener), listeners: make(map[string]genericListener),
listenerTokens: make(map[string]suture.ServiceToken), listenerTokens: make(map[string]suture.ServiceToken),
// A listener can fail twice, rapidly. Any more than that and it
// will be put on suspension for ten minutes. Restarts and changes
// due to config are done by removing and adding services, so are
// not subject to these limitations.
listenerSupervisor: suture.New("c.S.listenerSupervisor", suture.Spec{
Log: func(line string) {
l.Infoln(line)
},
FailureThreshold: 2,
FailureBackoff: 600 * time.Second,
}),
curConMut: sync.NewMutex(), curConMut: sync.NewMutex(),
currentConnection: make(map[protocol.DeviceID]Connection), currentConnection: make(map[protocol.DeviceID]Connection),
} }
@ -111,6 +128,7 @@ func NewService(cfg *config.Wrapper, myID protocol.DeviceID, mdl Model, tlsCfg *
service.Add(serviceFunc(service.connect)) service.Add(serviceFunc(service.connect))
service.Add(serviceFunc(service.handle)) service.Add(serviceFunc(service.handle))
service.Add(service.listenerSupervisor)
raw := cfg.RawCopy() raw := cfg.RawCopy()
// Actually starts the listeners and NAT service // Actually starts the listeners and NAT service
@ -417,7 +435,7 @@ func (s *Service) createListener(factory listenerFactory, uri *url.URL) bool {
listener := factory.New(uri, s.cfg, s.tlsCfg, s.conns, s.natService) listener := factory.New(uri, s.cfg, s.tlsCfg, s.conns, s.natService)
listener.OnAddressesChanged(s.logListenAddressesChangedEvent) listener.OnAddressesChanged(s.logListenAddressesChangedEvent)
s.listeners[uri.String()] = listener s.listeners[uri.String()] = listener
s.listenerTokens[uri.String()] = s.Add(listener) s.listenerTokens[uri.String()] = s.listenerSupervisor.Add(listener)
return true return true
} }
@ -481,7 +499,7 @@ func (s *Service) CommitConfiguration(from, to config.Configuration) bool {
for addr, listener := range s.listeners { for addr, listener := range s.listeners {
if _, ok := seen[addr]; !ok || !listener.Factory().Enabled(to) { if _, ok := seen[addr]; !ok || !listener.Factory().Enabled(to) {
l.Debugln("Stopping listener", addr) l.Debugln("Stopping listener", addr)
s.Remove(s.listenerTokens[addr]) s.listenerSupervisor.Remove(s.listenerTokens[addr])
delete(s.listenerTokens, addr) delete(s.listenerTokens, addr)
delete(s.listeners, addr) delete(s.listeners, addr)
} }