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main.go
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main.go
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// Copyright Fuzamei Corp. 2018 All Rights Reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"flag"
"fmt"
"log"
"path/filepath"
"strconv"
"github.com/coreos/etcd/etcdserver/etcdserverpb"
"github.com/coreos/etcd/pkg/pbutil"
"github.com/coreos/etcd/pkg/types"
"github.com/coreos/etcd/raft/raftpb"
raftsnap "github.com/coreos/etcd/snap"
"github.com/coreos/etcd/wal"
"github.com/coreos/etcd/wal/walpb"
"github.com/golang/protobuf/proto"
)
func main() {
snapfile := flag.String("start-snap", "", "The base name of snapshot file to start dumping")
index := flag.String("start-index", "", "The index to start dumping")
flag.Parse()
if len(flag.Args()) != 1 {
log.Fatalf("Must provide data-dir argument (got %+v)", flag.Args())
}
dataDir := flag.Args()[0]
if *snapfile != "" && *index != "" {
log.Fatal("start-snap and start-index flags cannot be used together.")
}
var (
walsnap walpb.Snapshot
snapshot *raftpb.Snapshot
err error
)
isIndex := *index != ""
if isIndex {
fmt.Printf("Start dumping log entries from index %s.\n", *index)
walsnap.Index, _ = strconv.ParseUint(*index, 10, 64)
} else {
if *snapfile == "" {
ss := raftsnap.New(snapDir(dataDir))
snapshot, err = ss.Load()
} else {
snapshot, err = raftsnap.Read(filepath.Join(snapDir(dataDir), *snapfile))
}
switch err {
case nil:
walsnap.Index, walsnap.Term = snapshot.Metadata.Index, snapshot.Metadata.Term
nodes := genIDSlice(snapshot.Metadata.ConfState.Nodes)
fmt.Printf("Snapshot:\nterm=%d index=%d nodes=%s\n",
walsnap.Term, walsnap.Index, nodes)
case raftsnap.ErrNoSnapshot:
fmt.Printf("Snapshot:\nempty\n")
default:
log.Fatalf("Failed loading snapshot: %v", err)
}
fmt.Println("Start dupmping log entries from snapshot.")
}
w, err := wal.OpenForRead(walDir(dataDir), walsnap)
if err != nil {
log.Fatalf("Failed opening WAL: %v", err)
}
wmetadata, state, ents, err := w.ReadAll()
w.Close()
if err != nil && (!isIndex || err != wal.ErrSnapshotNotFound) {
log.Fatalf("Failed reading WAL: %v", err)
}
id, cid := parseWALMetadata(wmetadata)
vid := types.ID(state.Vote)
fmt.Printf("WAL metadata:\nnodeID=%s clusterID=%s term=%d commitIndex=%d vote=%s\n",
id, cid, state.Term, state.Commit, vid)
fmt.Printf("WAL entries:\n")
fmt.Printf("lastIndex=%d\n", ents[len(ents)-1].Index)
fmt.Printf("%4s\t%10s\ttype\tdata\n", "term", "index")
for _, e := range ents {
msg := fmt.Sprintf("%4d\t%10d", e.Term, e.Index)
switch e.Type {
case raftpb.EntryNormal:
msg = fmt.Sprintf("%s\tnorm", msg)
if len(e.Data) == 0 {
break
}
// 解码
block := &Block{}
if err := proto.Unmarshal(e.Data, block); err != nil {
log.Printf("failed to unmarshal: %v", err)
break
}
msg = fmt.Sprintf("%s\t BlockHeight:%d", msg, block.Height)
case raftpb.EntryConfChange:
msg = fmt.Sprintf("%s\tconf", msg)
var r raftpb.ConfChange
if err := r.Unmarshal(e.Data); err != nil {
msg = fmt.Sprintf("%s\t???", msg)
} else {
msg = fmt.Sprintf("%s\tmethod=%s id=%s", msg, r.Type, types.ID(r.NodeID))
}
}
fmt.Println(msg)
}
}
func walDir(dataDir string) string { return filepath.Join(dataDir, "wal") }
func snapDir(dataDir string) string { return filepath.Join(dataDir, "snap") }
func parseWALMetadata(b []byte) (id, cid types.ID) {
var metadata etcdserverpb.Metadata
pbutil.MustUnmarshal(&metadata, b)
id = types.ID(metadata.NodeID)
cid = types.ID(metadata.ClusterID)
return id, cid
}
func genIDSlice(a []uint64) []types.ID {
ids := make([]types.ID, len(a))
for i, id := range a {
ids[i] = types.ID(id)
}
return ids
}
// Block struct
type Block struct {
Version int64 `protobuf:"varint,1,opt,name=version" json:"version,omitempty"`
ParentHash []byte `protobuf:"bytes,2,opt,name=parentHash,proto3" json:"parentHash,omitempty"`
TxHash []byte `protobuf:"bytes,3,opt,name=txHash,proto3" json:"txHash,omitempty"`
StateHash []byte `protobuf:"bytes,4,opt,name=stateHash,proto3" json:"stateHash,omitempty"`
Height int64 `protobuf:"varint,5,opt,name=height" json:"height,omitempty"`
BlockTime int64 `protobuf:"varint,6,opt,name=blockTime" json:"blockTime,omitempty"`
//Signature *Signature `protobuf:"bytes,8,opt,name=signature" json:"signature,omitempty"`
//Txs []*Transaction `protobuf:"bytes,7,rep,name=txs" json:"txs,omitempty"`
}
// Reset method
func (m *Block) Reset() { *m = Block{} }
func (m *Block) String() string { return proto.CompactTextString(m) }
// ProtoMessage method
func (*Block) ProtoMessage() {}