mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
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d17996f8b0
* Update V3 from V4 * Fix build v3 -> v4 * Update ssz * Update beacon_chain.pb.go * Fix formatter import * Update update-mockgen.sh comment to v4 * Fix conflicts. Pass build and tests * Fix test
83 lines
2.2 KiB
Go
83 lines
2.2 KiB
Go
package kv
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import (
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"context"
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"fmt"
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"path"
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"time"
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"github.com/prysmaticlabs/prysm/v4/config/params"
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"github.com/prysmaticlabs/prysm/v4/io/file"
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bolt "go.etcd.io/bbolt"
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"go.opencensus.io/trace"
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)
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const backupsDirectoryName = "backups"
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// Backup the database to the datadir backup directory.
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// Example for backup: $DATADIR/backups/prysm_validatordb_1029019.backup
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func (s *Store) Backup(ctx context.Context, outputDir string, permissionOverride bool) error {
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ctx, span := trace.StartSpan(ctx, "ValidatorDB.Backup")
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defer span.End()
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var backupsDir string
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var err error
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if outputDir != "" {
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backupsDir, err = file.ExpandPath(outputDir)
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if err != nil {
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return err
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}
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} else {
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backupsDir = path.Join(s.databasePath, backupsDirectoryName)
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}
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// Ensure the backups directory exists.
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if err := file.HandleBackupDir(backupsDir, permissionOverride); err != nil {
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return err
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}
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backupPath := path.Join(backupsDir, fmt.Sprintf("prysm_validatordb_%d.backup", time.Now().Unix()))
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log.WithField("backup", backupPath).Info("Writing backup database")
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copyDB, err := bolt.Open(
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backupPath,
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params.BeaconIoConfig().ReadWritePermissions,
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&bolt.Options{Timeout: params.BeaconIoConfig().BoltTimeout},
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)
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if err != nil {
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return err
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}
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defer func() {
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if err := copyDB.Close(); err != nil {
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log.WithError(err).Error("Failed to close backup database")
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}
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}()
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return s.db.View(func(tx *bolt.Tx) error {
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return tx.ForEach(func(name []byte, b *bolt.Bucket) error {
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log.Debugf("Copying bucket %s\n with %d keys", name, b.Stats().KeyN)
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return copyDB.Update(func(tx2 *bolt.Tx) error {
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b2, err := tx2.CreateBucketIfNotExists(name)
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if err != nil {
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return err
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}
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return b.ForEach(createNestedBuckets(b, b2, b2.Put))
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})
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})
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})
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}
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// Walks through each buckets and looks out for nested buckets so that
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// the backup db also includes them.
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func createNestedBuckets(srcBucket, dstBucket *bolt.Bucket, fn func(k, v []byte) error) func(k, v []byte) error {
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return func(k, v []byte) error {
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bkt := srcBucket.Bucket(k)
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if bkt != nil {
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b2, err := dstBucket.CreateBucketIfNotExists(k)
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if err != nil {
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return err
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}
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return bkt.ForEach(createNestedBuckets(bkt, b2, b2.Put))
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}
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return fn(k, v)
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}
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}
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