// 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
n.Node = raft.RestartNode(n.id, 10, 1, n.storage, 0)
n.start()
n.iface.connect()
}
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
}