mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
68 lines
1.9 KiB
Go
68 lines
1.9 KiB
Go
// Copyright 2021 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 version
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/coreos/go-semver/semver"
|
|
"go.uber.org/zap"
|
|
|
|
"go.etcd.io/etcd/server/v3/storage/backend"
|
|
"go.etcd.io/etcd/server/v3/storage/buckets"
|
|
)
|
|
|
|
var (
|
|
V3_5 = semver.Version{Major: 3, Minor: 5}
|
|
V3_6 = semver.Version{Major: 3, Minor: 6}
|
|
)
|
|
|
|
// UpdateStorageVersion updates storage version.
|
|
func UpdateStorageVersion(lg *zap.Logger, tx backend.BatchTx) error {
|
|
tx.Lock()
|
|
defer tx.Unlock()
|
|
v, err := detectStorageVersion(lg, tx)
|
|
if err != nil {
|
|
return fmt.Errorf("cannot determine storage version: %w", err)
|
|
}
|
|
switch *v {
|
|
case V3_5:
|
|
lg.Warn("setting storage version", zap.String("storage-version", V3_6.String()))
|
|
// All meta keys introduced in v3.6 should be filled in here.
|
|
buckets.UnsafeSetStorageVersion(tx, &V3_6)
|
|
case V3_6:
|
|
default:
|
|
lg.Warn("unknown storage version", zap.String("storage-version", v.String()))
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func detectStorageVersion(lg *zap.Logger, tx backend.ReadTx) (*semver.Version, error) {
|
|
v := buckets.UnsafeReadStorageVersion(tx)
|
|
if v != nil {
|
|
return v, nil
|
|
}
|
|
confstate := buckets.UnsafeConfStateFromBackend(lg, tx)
|
|
if confstate == nil {
|
|
return nil, fmt.Errorf("missing %q key", buckets.MetaConfStateName)
|
|
}
|
|
_, term := buckets.UnsafeReadConsistentIndex(tx)
|
|
if term == 0 {
|
|
return nil, fmt.Errorf("missing %q key", buckets.MetaTermKeyName)
|
|
}
|
|
copied := V3_5
|
|
return &copied, nil
|
|
}
|