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ff3729c4d5
Storage version should follow cluster version. During upgrades this should be immidiate as storage version can be always upgraded as storage is backward compatible. During downgrades it will be delayed and will require time for incompatible changes to be snapshotted. As storage version change can happen long after cluster is running, we need to add a step during bootstrap to validate if loaded data can be understood by migrator.
102 lines
2.7 KiB
Go
102 lines
2.7 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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"go.etcd.io/etcd/server/v3/storage/backend"
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"go.etcd.io/etcd/server/v3/storage/schema"
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"go.uber.org/zap"
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"go.etcd.io/etcd/api/v3/version"
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"go.etcd.io/etcd/server/v3/etcdserver/api/membership"
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serverversion "go.etcd.io/etcd/server/v3/etcdserver/version"
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)
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// serverVersionAdapter implements Server interface needed by serverversion.Monitor
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type serverVersionAdapter struct {
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*EtcdServer
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tx backend.BatchTx
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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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tx: nil,
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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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// TODO switch to updateClusterVersionV3 in 3.6
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s.GoAttach(func() { s.updateClusterVersionV2(version) })
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}
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func (s *serverVersionAdapter) DowngradeCancel() {
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ctx, cancel := context.WithTimeout(context.Background(), s.Cfg.ReqTimeout())
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if _, err := s.downgradeCancel(ctx); err != nil {
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s.lg.Warn("failed to cancel downgrade", zap.Error(err))
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}
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cancel()
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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() *membership.DowngradeInfo {
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return s.cluster.DowngradeInfo()
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}
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func (s *serverVersionAdapter) GetVersions() map[string]*version.Versions {
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return getVersions(s.lg, s.cluster, s.id, s.peerRt)
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}
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func (s *serverVersionAdapter) GetStorageVersion() *semver.Version {
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if s.tx == nil {
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s.Lock()
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defer s.Unlock()
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}
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v, err := schema.UnsafeDetectSchemaVersion(s.lg, s.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) {
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if s.tx == nil {
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s.Lock()
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defer s.Unlock()
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}
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err := schema.UnsafeMigrate(s.lg, s.tx, target)
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if err != nil {
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s.lg.Error("failed migrating storage schema", zap.String("storage-version", target.String()), zap.Error(err))
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}
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}
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func (s *serverVersionAdapter) Lock() {
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s.tx = s.be.BatchTx()
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s.tx.Lock()
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}
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func (s *serverVersionAdapter) Unlock() {
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s.tx.Unlock()
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s.tx = nil
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}
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