85 lines
2.3 KiB
Go
85 lines
2.3 KiB
Go
package main
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import (
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"os"
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"github.com/prologic/bitcask"
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"github.com/prologic/bitcask/internal/config"
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"github.com/prologic/bitcask/internal/index"
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log "github.com/sirupsen/logrus"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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)
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var recoveryCmd = &cobra.Command{
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Use: "recover",
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Aliases: []string{"recovery"},
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Short: "Analyzes and recovers the index file for corruption scenarios",
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Long: `This analyze files to detect different forms of persistence corruption in
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persisted files. It also allows to recover the files to the latest point of integrity.
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Recovered files have the .recovered extension`,
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Args: cobra.ExactArgs(0),
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PreRun: func(cmd *cobra.Command, args []string) {
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viper.BindPFlag("dry-run", cmd.Flags().Lookup("dry-run"))
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},
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Run: func(cmd *cobra.Command, args []string) {
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path := viper.GetString("path")
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dryRun := viper.GetBool("dry-run")
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os.Exit(recover(path, dryRun))
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},
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}
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func init() {
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RootCmd.AddCommand(recoveryCmd)
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recoveryCmd.Flags().BoolP("dry-run", "n", false, "Will only check files health without applying recovery if unhealthy")
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}
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func recover(path string, dryRun bool) int {
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maxKeySize := bitcask.DefaultMaxKeySize
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if cfg, err := config.Decode(path); err == nil {
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maxKeySize = cfg.MaxKeySize
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}
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t, found, err := index.ReadFromFile(path, maxKeySize)
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if err != nil && !index.IsIndexCorruption(err) {
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log.WithError(err).Info("error while opening the index file")
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}
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if !found {
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log.Info("index file doesn't exist, will be recreated on next run.")
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return 0
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}
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if err == nil {
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log.Debug("index file is not corrupted")
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return 0
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}
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log.Debugf("index file is corrupted: %v", err)
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if dryRun {
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log.Debug("dry-run mode, not writing to a file")
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return 0
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}
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fi, err := os.OpenFile("index.recovered", os.O_WRONLY|os.O_CREATE, 0600)
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if err != nil {
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log.WithError(err).Info("error while creating recovered index file")
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return 1
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}
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// Leverage that t has the partiatially read tree even on corrupted files
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err = index.WriteIndex(t, fi)
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if err != nil {
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log.WithError(err).Info("error while writing the recovered index file")
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fi.Close()
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return 1
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}
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err = fi.Close()
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if err != nil {
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log.WithError(err).Info("the recovered file index coudn't be saved correctly")
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}
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log.Debug("the index was recovered in the index.recovered new file")
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return 0
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}
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