示例#1
0
文件: raft.go 项目: algoadv/etcd
func restartNode(cfg *ServerConfig, snapshot *raftpb.Snapshot) (types.ID, *cluster, raft.Node, *raftStorage, *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)

	plog.Infof("restarting member %s in cluster %s at commit index %d", id, cid, st.Commit)
	cl := newCluster("")
	cl.SetID(cid)
	s := newRaftStorage()
	if snapshot != nil {
		s.ApplySnapshot(*snapshot)
	}
	s.SetHardState(st)
	s.Append(ents)
	c := &raft.Config{
		ID:              uint64(id),
		ElectionTick:    cfg.ElectionTicks,
		HeartbeatTick:   1,
		Storage:         s,
		MaxSizePerMsg:   maxSizePerMsg,
		MaxInflightMsgs: maxInflightMsgs,
	}
	n := raft.RestartNode(c)
	raftStatus = n.Status
	advanceTicksForElection(n, c.ElectionTick)
	return id, cl, n, s, w
}
示例#2
0
文件: raft.go 项目: algoadv/etcd
func restartAsStandaloneNode(cfg *ServerConfig, snapshot *raftpb.Snapshot) (types.ID, *cluster, raft.Node, *raftStorage, *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)

	// discard the previously uncommitted entries
	for i, ent := range ents {
		if ent.Index > st.Commit {
			plog.Infof("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 {
		plog.Fatalf("%v", err)
	}
	if len(ents) != 0 {
		st.Commit = ents[len(ents)-1].Index
	}

	plog.Printf("forcing restart of member %s in cluster %s at commit index %d", id, cid, st.Commit)
	cl := newCluster("")
	cl.SetID(cid)
	s := newRaftStorage()
	if snapshot != nil {
		s.ApplySnapshot(*snapshot)
	}
	s.SetHardState(st)
	s.Append(ents)
	c := &raft.Config{
		ID:              uint64(id),
		ElectionTick:    cfg.ElectionTicks,
		HeartbeatTick:   1,
		Storage:         s,
		MaxSizePerMsg:   maxSizePerMsg,
		MaxInflightMsgs: maxInflightMsgs,
	}
	n := raft.RestartNode(c)
	raftStatus = n.Status
	return id, cl, n, s, w
}
示例#3
0
文件: node.go 项目: algoadv/etcd
// restart restarts the node. restart a started node
// blocks and might affect the future stop operation.
func (n *node) restart() {
	// wait for the shutdown
	<-n.stopc
	c := &raft.Config{
		ID:              n.id,
		ElectionTick:    10,
		HeartbeatTick:   1,
		Storage:         n.storage,
		MaxSizePerMsg:   1024 * 1024,
		MaxInflightMsgs: 256,
	}
	n.Node = raft.RestartNode(c)
	n.start()
	n.iface.connect()
}