// Start starts the raft server.
// The function assumes that join has been accepted successfully.
func (s *PeerServer) Start(snapshot bool, discoverURL string, peers []string) error {
s.Lock()
defer s.Unlock()
if s.started {
return nil
}
s.started = true
// LoadSnapshot
if snapshot {
err := s.raftServer.LoadSnapshot()
if err == nil {
log.Debugf("%s finished load snapshot", s.Config.Name)
} else {
log.Debug(err)
}
}
s.raftServer.Init()
// Set NOCOW for data directory in btrfs
if btrfs.IsBtrfs(s.raftServer.LogPath()) {
if err := btrfs.SetNOCOWFile(s.raftServer.LogPath()); err != nil {
log.Warnf("Failed setting NOCOW: %v", err)
}
}
s.findCluster(discoverURL, peers)
s.stopNotify = make(chan bool)
s.removeNotify = make(chan bool)
s.closeChan = make(chan bool)
s.startRoutine(s.monitorSync)
s.startRoutine(s.monitorTimeoutThreshold)
s.startRoutine(s.monitorActiveSize)
s.startRoutine(s.monitorPeerActivity)
// open the snapshot
if snapshot {
s.startRoutine(s.monitorSnapshot)
}
return nil
}
func (s *PeerServer) SetRaftServer(raftServer raft.Server, snapshot bool) {
s.snapConf = &snapshotConf{
checkingInterval: time.Second * 3,
// this is not accurate, we will update raft to provide an api
lastIndex: raftServer.CommitIndex(),
snapshotThr: uint64(s.Config.SnapshotCount),
}
raftServer.AddEventListener(raft.StateChangeEventType, s.raftEventLogger)
raftServer.AddEventListener(raft.LeaderChangeEventType, s.raftEventLogger)
raftServer.AddEventListener(raft.TermChangeEventType, s.raftEventLogger)
raftServer.AddEventListener(raft.AddPeerEventType, s.raftEventLogger)
raftServer.AddEventListener(raft.RemovePeerEventType, s.raftEventLogger)
raftServer.AddEventListener(raft.HeartbeatIntervalEventType, s.raftEventLogger)
raftServer.AddEventListener(raft.ElectionTimeoutThresholdEventType, s.raftEventLogger)
raftServer.AddEventListener(raft.HeartbeatEventType, s.recordMetricEvent)
raftServer.AddEventListener(raft.RemovedEventType, s.removedEvent)
s.raftServer = raftServer
s.removedInLog = false
// LoadSnapshot
if snapshot {
err := s.raftServer.LoadSnapshot()
if err == nil {
log.Debugf("%s finished load snapshot", s.Config.Name)
} else {
log.Debug(err)
}
}
s.raftServer.Init()
// Set NOCOW for data directory in btrfs
if btrfs.IsBtrfs(s.raftServer.LogPath()) {
if err := btrfs.SetNOCOWFile(s.raftServer.LogPath()); err != nil {
log.Warnf("Failed setting NOCOW: %v", err)
}
}
}