mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
bfd5170f66
Previously the SetConsistentIndex() is called during the apply workflow, but it's outside the db transaction. If a commit happens between SetConsistentIndex and the following apply workflow, and etcd crashes for whatever reason right after the commit, then etcd commits an incomplete transaction to db. Eventually etcd runs into the data inconsistency issue. In this commit, we move the SetConsistentIndex into a txPostLockHook, so it will be executed inside the transaction lock.
101 lines
3.1 KiB
Go
101 lines
3.1 KiB
Go
// Copyright 2021 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package etcdserver
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import (
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"context"
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"github.com/coreos/go-semver/semver"
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pb "go.etcd.io/etcd/api/v3/etcdserverpb"
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"go.etcd.io/etcd/api/v3/membershippb"
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"go.etcd.io/etcd/api/v3/version"
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serverversion "go.etcd.io/etcd/server/v3/etcdserver/version"
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"go.etcd.io/etcd/server/v3/storage/schema"
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)
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// serverVersionAdapter implements the interface Server defined in package
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// go.etcd.io/etcd/server/v3/etcdserver/version, and it's needed by Monitor
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// in the same package.
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type serverVersionAdapter struct {
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*EtcdServer
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}
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func NewServerVersionAdapter(s *EtcdServer) *serverVersionAdapter {
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return &serverVersionAdapter{
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EtcdServer: s,
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}
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}
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var _ serverversion.Server = (*serverVersionAdapter)(nil)
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func (s *serverVersionAdapter) UpdateClusterVersion(version string) {
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s.GoAttach(func() { s.updateClusterVersionV3(version) })
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}
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func (s *serverVersionAdapter) LinearizableReadNotify(ctx context.Context) error {
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return s.linearizableReadNotify(ctx)
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}
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func (s *serverVersionAdapter) DowngradeEnable(ctx context.Context, targetVersion *semver.Version) error {
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raftRequest := membershippb.DowngradeInfoSetRequest{Enabled: true, Ver: targetVersion.String()}
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_, err := s.raftRequest(ctx, pb.InternalRaftRequest{DowngradeInfoSet: &raftRequest})
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return err
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}
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func (s *serverVersionAdapter) DowngradeCancel(ctx context.Context) error {
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raftRequest := membershippb.DowngradeInfoSetRequest{Enabled: false}
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_, err := s.raftRequest(ctx, pb.InternalRaftRequest{DowngradeInfoSet: &raftRequest})
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return err
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}
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func (s *serverVersionAdapter) GetClusterVersion() *semver.Version {
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return s.cluster.Version()
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}
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func (s *serverVersionAdapter) GetDowngradeInfo() *serverversion.DowngradeInfo {
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return s.cluster.DowngradeInfo()
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}
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func (s *serverVersionAdapter) GetMembersVersions() map[string]*version.Versions {
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return getMembersVersions(s.lg, s.cluster, s.id, s.peerRt, s.Cfg.ReqTimeout())
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}
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func (s *serverVersionAdapter) GetStorageVersion() *semver.Version {
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// `applySnapshot` sets a new backend instance, so we need to acquire the bemu lock.
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s.bemu.RLock()
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defer s.bemu.RUnlock()
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tx := s.be.ReadTx()
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tx.RLock()
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defer tx.RUnlock()
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v, err := schema.UnsafeDetectSchemaVersion(s.lg, tx)
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if err != nil {
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return nil
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}
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return &v
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}
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func (s *serverVersionAdapter) UpdateStorageVersion(target semver.Version) error {
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// `applySnapshot` sets a new backend instance, so we need to acquire the bemu lock.
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s.bemu.RLock()
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defer s.bemu.RUnlock()
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tx := s.be.BatchTx()
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tx.LockWithoutHook()
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defer tx.Unlock()
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return schema.UnsafeMigrate(s.lg, tx, s.r.storage, target)
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}
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