func startNode(cfg *ServerConfig, ids []types.ID) (id types.ID, n raft.Node, s *raft.MemoryStorage, w *wal.WAL) { var err error member := cfg.Cluster.MemberByName(cfg.Name) metadata := pbutil.MustMarshal( &pb.Metadata{ NodeID: uint64(member.ID), ClusterID: uint64(cfg.Cluster.ID()), }, ) if err := os.MkdirAll(cfg.SnapDir(), privateDirMode); err != nil { log.Fatalf("etcdserver create snapshot directory error: %v", err) } if w, err = wal.Create(cfg.WALDir(), metadata); err != nil { log.Fatalf("etcdserver: create wal error: %v", err) } peers := make([]raft.Peer, len(ids)) for i, id := range ids { ctx, err := json.Marshal((*cfg.Cluster).Member(id)) if err != nil { log.Panicf("marshal member should never fail: %v", err) } peers[i] = raft.Peer{ID: uint64(id), Context: ctx} } id = member.ID log.Printf("etcdserver: start member %s in cluster %s", id, cfg.Cluster.ID()) s = raft.NewMemoryStorage() n = raft.StartNode(uint64(id), peers, cfg.ElectionTicks, 1, s) raftStatus = n.Status return }
func startNode(id uint64, peers []raft.Peer, iface iface) *node { st := raft.NewMemoryStorage() rn := raft.StartNode(id, peers, 10, 1, st) n := &node{ Node: rn, id: id, storage: st, iface: iface, pausec: make(chan bool), } n.start() return n }
func restartNode(cfg *ServerConfig, snapshot *raftpb.Snapshot) (types.ID, raft.Node, *raft.MemoryStorage, *wal.WAL) { var walsnap walpb.Snapshot if snapshot != nil { walsnap.Index, walsnap.Term = snapshot.Metadata.Index, snapshot.Metadata.Term } w, id, cid, st, ents := readWAL(cfg.WALDir(), walsnap) cfg.Cluster.SetID(cid) log.Printf("etcdserver: restart member %s in cluster %s at commit index %d", id, cfg.Cluster.ID(), st.Commit) s := raft.NewMemoryStorage() if snapshot != nil { s.ApplySnapshot(*snapshot) } s.SetHardState(st) s.Append(ents) n := raft.RestartNode(uint64(id), cfg.ElectionTicks, 1, s, 0) raftStatus = n.Status return id, n, s, w }
func restartAsStandaloneNode(cfg *ServerConfig, snapshot *raftpb.Snapshot) (types.ID, raft.Node, *raft.MemoryStorage, *wal.WAL) { var walsnap walpb.Snapshot if snapshot != nil { walsnap.Index, walsnap.Term = snapshot.Metadata.Index, snapshot.Metadata.Term } w, id, cid, st, ents := readWAL(cfg.WALDir(), walsnap) cfg.Cluster.SetID(cid) // discard the previously uncommitted entries for i, ent := range ents { if ent.Index > st.Commit { log.Printf("etcdserver: discarding %d uncommitted WAL entries ", len(ents)-i) ents = ents[:i] break } } // force append the configuration change entries toAppEnts := createConfigChangeEnts(getIDs(snapshot, ents), uint64(id), st.Term, st.Commit) ents = append(ents, toAppEnts...) // force commit newly appended entries err := w.Save(raftpb.HardState{}, toAppEnts) if err != nil { log.Fatalf("etcdserver: %v", err) } if len(ents) != 0 { st.Commit = ents[len(ents)-1].Index } log.Printf("etcdserver: forcing restart of member %s in cluster %s at commit index %d", id, cfg.Cluster.ID(), st.Commit) s := raft.NewMemoryStorage() if snapshot != nil { s.ApplySnapshot(*snapshot) } s.SetHardState(st) s.Append(ents) n := raft.RestartNode(uint64(id), cfg.ElectionTicks, 1, s, 0) raftStatus = n.Status return id, n, s, w }