forked from etcd-io/etcd
/
corrupt.go
181 lines (159 loc) · 4.31 KB
/
corrupt.go
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// Copyright 2017 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package etcdserver
import (
"context"
"time"
"github.com/coreos/etcd/clientv3"
pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
"github.com/coreos/etcd/mvcc"
"github.com/coreos/etcd/pkg/types"
)
func (s *EtcdServer) monitorKVHash() {
t := s.Cfg.CorruptCheckTime
if t == 0 {
return
}
plog.Infof("enabled corruption checking with %s interval", t)
for {
select {
case <-s.stopping:
return
case <-time.After(t):
}
if !s.isLeader() {
continue
}
if err := s.checkHashKV(); err != nil {
plog.Debugf("check hash kv failed %v", err)
}
}
}
func (s *EtcdServer) checkHashKV() error {
h, rev, crev, err := s.kv.HashByRev(0)
if err != nil {
plog.Fatalf("failed to hash kv store (%v)", err)
}
resps := []*clientv3.HashKVResponse{}
for _, m := range s.cluster.Members() {
if m.ID == s.ID() {
continue
}
cli, cerr := clientv3.New(clientv3.Config{Endpoints: m.PeerURLs})
if cerr != nil {
continue
}
respsLen := len(resps)
for _, c := range cli.Endpoints() {
ctx, cancel := context.WithTimeout(context.Background(), s.Cfg.ReqTimeout())
resp, herr := cli.HashKV(ctx, c, rev)
cancel()
if herr == nil {
cerr = herr
resps = append(resps, resp)
break
}
}
cli.Close()
if respsLen == len(resps) {
plog.Warningf("failed to hash kv for peer %s (%v)", types.ID(m.ID), cerr)
}
}
ctx, cancel := context.WithTimeout(context.Background(), s.Cfg.ReqTimeout())
err = s.linearizableReadNotify(ctx)
cancel()
if err != nil {
return err
}
h2, rev2, crev2, err := s.kv.HashByRev(0)
if err != nil {
plog.Warningf("failed to hash kv store (%v)", err)
return err
}
alarmed := false
mismatch := func(id uint64) {
if alarmed {
return
}
alarmed = true
a := &pb.AlarmRequest{
MemberID: uint64(id),
Action: pb.AlarmRequest_ACTIVATE,
Alarm: pb.AlarmType_CORRUPT,
}
s.goAttach(func() {
s.raftRequest(s.ctx, pb.InternalRaftRequest{Alarm: a})
})
}
if h2 != h && rev2 == rev && crev == crev2 {
plog.Warningf("mismatched hashes %d and %d for revision %d", h, h2, rev)
mismatch(uint64(s.ID()))
}
for _, resp := range resps {
id := resp.Header.MemberId
if resp.Header.Revision > rev2 {
plog.Warningf(
"revision %d from member %v, expected at most %d",
resp.Header.Revision,
types.ID(id),
rev2)
mismatch(id)
}
if resp.CompactRevision > crev2 {
plog.Warningf(
"compact revision %d from member %v, expected at most %d",
resp.CompactRevision,
types.ID(id),
crev2,
)
mismatch(id)
}
if resp.CompactRevision == crev && resp.Hash != h {
plog.Warningf(
"hash %d at revision %d from member %v, expected hash %d",
resp.Hash,
rev,
types.ID(id),
h,
)
mismatch(id)
}
}
return nil
}
type applierV3Corrupt struct {
applierV3
}
func newApplierV3Corrupt(a applierV3) *applierV3Corrupt { return &applierV3Corrupt{a} }
func (a *applierV3Corrupt) Put(txn mvcc.TxnWrite, p *pb.PutRequest) (*pb.PutResponse, error) {
return nil, ErrCorrupt
}
func (a *applierV3Corrupt) Range(txn mvcc.TxnRead, p *pb.RangeRequest) (*pb.RangeResponse, error) {
return nil, ErrCorrupt
}
func (a *applierV3Corrupt) DeleteRange(txn mvcc.TxnWrite, p *pb.DeleteRangeRequest) (*pb.DeleteRangeResponse, error) {
return nil, ErrCorrupt
}
func (a *applierV3Corrupt) Txn(rt *pb.TxnRequest) (*pb.TxnResponse, error) {
return nil, ErrCorrupt
}
func (a *applierV3Corrupt) Compaction(compaction *pb.CompactionRequest) (*pb.CompactionResponse, <-chan struct{}, error) {
return nil, nil, ErrCorrupt
}
func (a *applierV3Corrupt) LeaseGrant(lc *pb.LeaseGrantRequest) (*pb.LeaseGrantResponse, error) {
return nil, ErrCorrupt
}
func (a *applierV3Corrupt) LeaseRevoke(lc *pb.LeaseRevokeRequest) (*pb.LeaseRevokeResponse, error) {
return nil, ErrCorrupt
}