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0005_fix_messagepack_space_index_format.go
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0005_fix_messagepack_space_index_format.go
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// Copyright 2018-2023 CERN
//
// 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.
//
// In applying this license, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
package migrator
import (
"os"
"path/filepath"
"github.com/shamaton/msgpack/v2"
)
func init() {
registerMigration("0005", Migration0005{})
}
type Migration0005 struct{}
// Migrate fixes the messagepack space index data structure
func (Migration0005) Migrate(migrator *Migrator) (Result, error) {
root := migrator.lu.InternalRoot()
indexes, err := filepath.Glob(filepath.Join(root, "indexes", "**", "*.mpk"))
if err != nil {
return stateFailed, err
}
for _, i := range indexes {
migrator.log.Info().Str("root", migrator.lu.InternalRoot()).Msg("Fixing index format of " + i)
// Read old-format index
oldData, err := os.ReadFile(i)
if err != nil {
return stateFailed, err
}
oldIndex := map[string][]byte{}
err = msgpack.Unmarshal(oldData, &oldIndex)
if err != nil {
// likely already migrated -> skip
migrator.log.Warn().Str("root", migrator.lu.InternalRoot()).Msg("Invalid index format found in " + i)
continue
}
// Write new-format index
newIndex := map[string]string{}
for k, v := range oldIndex {
newIndex[k] = string(v)
}
newData, err := msgpack.Marshal(newIndex)
if err != nil {
return stateFailed, err
}
err = os.WriteFile(i, newData, 0600)
if err != nil {
return stateFailed, err
}
}
migrator.log.Info().Msg("done.")
return stateSucceeded, nil
}
// Rollback rolls back the migration
func (Migration0005) Rollback(migrator *Migrator) (Result, error) {
root := migrator.lu.InternalRoot()
indexes, err := filepath.Glob(filepath.Join(root, "indexes", "**", "*.mpk"))
if err != nil {
return stateFailed, err
}
for _, i := range indexes {
migrator.log.Info().Str("root", migrator.lu.InternalRoot()).Msg("Fixing index format of " + i)
oldData, err := os.ReadFile(i)
if err != nil {
return stateFailed, err
}
oldIndex := map[string]string{}
err = msgpack.Unmarshal(oldData, &oldIndex)
if err != nil {
migrator.log.Warn().Str("root", migrator.lu.InternalRoot()).Msg("Invalid index format found in " + i)
continue
}
// Write new-format index
newIndex := map[string][]byte{}
for k, v := range oldIndex {
newIndex[k] = []byte(v)
}
newData, err := msgpack.Marshal(newIndex)
if err != nil {
return stateFailed, err
}
err = os.WriteFile(i, newData, 0600)
if err != nil {
return stateFailed, err
}
}
migrator.log.Info().Msg("done.")
return stateDown, nil
}