Exemple #1
0
func newMemberCollection(ms []*etcdserver.Member) httptypes.MemberCollection {
	c := httptypes.MemberCollection(make([]httptypes.Member, len(ms)))

	for i, m := range ms {
		tm := httptypes.Member{
			ID:         strutil.IDAsHex(m.ID),
			Name:       m.Name,
			PeerURLs:   make([]string, len(m.PeerURLs)),
			ClientURLs: make([]string, len(m.ClientURLs)),
		}

		copy(tm.PeerURLs, m.PeerURLs)
		copy(tm.ClientURLs, m.ClientURLs)

		c[i] = tm
	}

	return c
}
Exemple #2
0
// send uses the given client to send a message to a member in the given
// ClusterStore, retrying up to 3 times for each message. The given
// ServerStats and LeaderStats are updated appropriately
func send(c *http.Client, cl *Cluster, m raftpb.Message, ss *stats.ServerStats, ls *stats.LeaderStats) {
	cid := cl.ID()
	// TODO (xiangli): reasonable retry logic
	for i := 0; i < 3; i++ {
		memb := cl.Member(m.To)
		if memb == nil {
			// TODO: unknown peer id.. what do we do? I
			// don't think his should ever happen, need to
			// look into this further.
			log.Printf("etcdhttp: no member for %d", m.To)
			return
		}
		u := fmt.Sprintf("%s%s", memb.PickPeerURL(), raftPrefix)

		// TODO: don't block. we should be able to have 1000s
		// of messages out at a time.
		data, err := m.Marshal()
		if err != nil {
			log.Println("etcdhttp: dropping message:", err)
			return // drop bad message
		}
		if m.Type == raftpb.MsgApp {
			ss.SendAppendReq(len(data))
		}
		to := strutil.IDAsHex(m.To)
		fs := ls.Follower(to)

		start := time.Now()
		sent := httpPost(c, u, cid, data)
		end := time.Now()
		if sent {
			fs.Succ(end.Sub(start))
			return
		}
		fs.Fail()
		// TODO: backoff
	}
}
Exemple #3
0
func removedMemberStoreKey(id uint64) string {
	return path.Join(storeRemovedMembersPrefix, strutil.IDAsHex(id))
}
Exemple #4
0
func (s *EtcdServer) UpdateRecvApp(from uint64, length int64) {
	s.stats.RecvAppendReq(strutil.IDAsHex(from), int(length))
}
Exemple #5
0
// NewServer creates a new EtcdServer from the supplied configuration. The
// configuration is considered static for the lifetime of the EtcdServer.
func NewServer(cfg *ServerConfig) *EtcdServer {
	if err := os.MkdirAll(cfg.SnapDir(), privateDirMode); err != nil {
		log.Fatalf("etcdserver: cannot create snapshot directory: %v", err)
	}
	ss := snap.New(cfg.SnapDir())
	st := store.New()
	var w *wal.WAL
	var n raft.Node
	var id uint64
	haveWAL := wal.Exist(cfg.WALDir())
	switch {
	case !haveWAL && cfg.ClusterState == ClusterStateValueExisting:
		cl, err := GetClusterFromPeers(cfg.Cluster.PeerURLs())
		if err != nil {
			log.Fatal(err)
		}
		if err := cfg.Cluster.ValidateAndAssignIDs(cl.Members()); err != nil {
			log.Fatalf("etcdserver: %v", err)
		}
		cfg.Cluster.SetID(cl.id)
		cfg.Cluster.SetStore(st)
		id, n, w = startNode(cfg, nil)
	case !haveWAL && cfg.ClusterState == ClusterStateValueNew:
		if err := cfg.VerifyBootstrapConfig(); err != nil {
			log.Fatalf("etcdserver: %v", err)
		}
		m := cfg.Cluster.MemberByName(cfg.Name)
		if cfg.ShouldDiscover() {
			d, err := discovery.New(cfg.DiscoveryURL, m.ID, cfg.Cluster.String())
			if err != nil {
				log.Fatalf("etcdserver: cannot init discovery %v", err)
			}
			s, err := d.Discover()
			if err != nil {
				log.Fatalf("etcdserver: %v", err)
			}
			if cfg.Cluster, err = NewClusterFromString(cfg.Cluster.name, s); err != nil {
				log.Fatalf("etcdserver: %v", err)
			}
		}
		cfg.Cluster.SetStore(st)
		id, n, w = startNode(cfg, cfg.Cluster.MemberIDs())
	case haveWAL:
		if cfg.ShouldDiscover() {
			log.Printf("etcdserver: warn: ignoring discovery: etcd has already been initialized and has a valid log in %q", cfg.WALDir())
		}
		var index uint64
		snapshot, err := ss.Load()
		if err != nil && err != snap.ErrNoSnapshot {
			log.Fatal(err)
		}
		if snapshot != nil {
			log.Printf("etcdserver: recovering from snapshot at index %d", snapshot.Index)
			st.Recovery(snapshot.Data)
			index = snapshot.Index
		}
		cfg.Cluster = NewClusterFromStore(cfg.Cluster.name, st)
		id, n, w = restartNode(cfg, index, snapshot)
	default:
		log.Fatalf("etcdserver: unsupported bootstrap config")
	}

	sstats := &stats.ServerStats{
		Name: cfg.Name,
		ID:   strutil.IDAsHex(id),
	}
	lstats := stats.NewLeaderStats(strutil.IDAsHex(id))

	s := &EtcdServer{
		store:      st,
		node:       n,
		id:         id,
		attributes: Attributes{Name: cfg.Name, ClientURLs: cfg.ClientURLs.StringSlice()},
		Cluster:    cfg.Cluster,
		storage: struct {
			*wal.WAL
			*snap.Snapshotter
		}{w, ss},
		stats:      sstats,
		lstats:     lstats,
		send:       Sender(cfg.Transport, cfg.Cluster, sstats, lstats),
		Ticker:     time.Tick(100 * time.Millisecond),
		SyncTicker: time.Tick(500 * time.Millisecond),
		snapCount:  cfg.SnapCount,
	}
	return s
}