frostfs-node/pkg/local_object_storage/shard/id.go

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package shard
import (
"context"
"fmt"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
"github.com/mr-tron/base58"
"go.uber.org/zap"
)
// ID represents Shard identifier.
//
// Each shard should have the unique ID within
// a single instance of local storage.
type ID []byte
// NewIDFromBytes constructs ID from byte slice.
func NewIDFromBytes(v []byte) *ID {
return (*ID)(&v)
}
func (id ID) String() string {
return base58.Encode(id)
}
// ID returns Shard identifier.
func (s *Shard) ID() *ID {
return s.info.ID
}
// UpdateID reads shard ID saved in the metabase and updates it if it is missing.
func (s *Shard) UpdateID(ctx context.Context) (err error) {
var metabaseOpened bool
var idFromMetabase []byte
if err = s.metaBase.Open(ctx, false); err != nil {
err = fmt.Errorf("failed to open metabase: %w", err)
} else {
metabaseOpened = true
}
if metabaseOpened {
defer func() {
cErr := s.metaBase.Close()
if cErr != nil {
err = fmt.Errorf("failed to close metabase: %w", cErr)
}
}()
if idFromMetabase, err = s.metaBase.ReadShardID(); err != nil {
err = fmt.Errorf("failed to read shard id from metabase: %w", err)
}
}
if len(idFromMetabase) != 0 {
s.info.ID = NewIDFromBytes(idFromMetabase)
}
if s.cfg.metricsWriter != nil {
s.cfg.metricsWriter.SetShardID(s.info.ID.String())
}
s.log = &logger.Logger{Logger: s.log.With(zap.Stringer("shard_id", s.info.ID))}
s.metaBase.SetLogger(s.log)
s.blobStor.SetLogger(s.log)
if s.hasWriteCache() {
s.writeCache.SetLogger(s.log)
}
s.metaBase.SetParentID(s.info.ID.String())
s.blobStor.SetParentID(s.info.ID.String())
if s.pilorama != nil {
s.pilorama.SetParentID(s.info.ID.String())
}
if len(idFromMetabase) == 0 && metabaseOpened {
if err = s.metaBase.WriteShardID(*s.info.ID); err != nil {
err = fmt.Errorf("failed to write shard id to metabase: %w", err)
}
}
return
}