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When performing the downgrade operation, users can confirm whether each member is ready to be downgraded using the field 'storageVersion'. If it's equal to the 'target version' in the downgrade command, then it's ready to be downgraded; otherwise, the etcd member is still in progress of processing the db file.
93 lines
2.8 KiB
Go
93 lines
2.8 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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tx := s.be.BatchTx()
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tx.Lock()
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defer tx.Unlock()
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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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tx := s.be.BatchTx()
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tx.Lock()
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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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