mirror of
https://github.com/offen/docker-volume-backup.git
synced 2024-11-24 14:10:27 +01:00
89 lines
2.6 KiB
Go
89 lines
2.6 KiB
Go
// Copyright 2024 - offen.software <hioffen@posteo.de>
|
|
// SPDX-License-Identifier: MPL-2.0
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"io/fs"
|
|
"path/filepath"
|
|
|
|
"github.com/offen/docker-volume-backup/internal/errwrap"
|
|
"github.com/otiai10/copy"
|
|
)
|
|
|
|
// createArchive creates a tar archive of the configured backup location and
|
|
// saves it to disk.
|
|
func (s *script) createArchive() error {
|
|
backupSources := s.c.BackupSources
|
|
|
|
if s.c.BackupFromSnapshot {
|
|
s.logger.Warn(
|
|
"Using BACKUP_FROM_SNAPSHOT has been deprecated and will be removed in the next major version.",
|
|
)
|
|
s.logger.Warn(
|
|
"Please use `archive-pre` and `archive-post` commands to prepare your backup sources. Refer to the documentation for an upgrade guide.",
|
|
)
|
|
backupSources = filepath.Join("/tmp", s.c.BackupSources)
|
|
// copy before compressing guard against a situation where backup folder's content are still growing.
|
|
s.registerHook(hookLevelPlumbing, func(error) error {
|
|
if err := remove(backupSources); err != nil {
|
|
return errwrap.Wrap(err, "error removing snapshot")
|
|
}
|
|
s.logger.Info(
|
|
fmt.Sprintf("Removed snapshot `%s`.", backupSources),
|
|
)
|
|
return nil
|
|
})
|
|
if err := copy.Copy(s.c.BackupSources, backupSources, copy.Options{
|
|
PreserveTimes: true,
|
|
PreserveOwner: true,
|
|
}); err != nil {
|
|
return errwrap.Wrap(err, "error creating snapshot")
|
|
}
|
|
s.logger.Info(
|
|
fmt.Sprintf("Created snapshot of `%s` at `%s`.", s.c.BackupSources, backupSources),
|
|
)
|
|
}
|
|
|
|
tarFile := s.file
|
|
s.registerHook(hookLevelPlumbing, func(error) error {
|
|
if err := remove(tarFile); err != nil {
|
|
return errwrap.Wrap(err, "error removing tar file")
|
|
}
|
|
s.logger.Info(
|
|
fmt.Sprintf("Removed tar file `%s`.", tarFile),
|
|
)
|
|
return nil
|
|
})
|
|
|
|
backupPath, err := filepath.Abs(stripTrailingSlashes(backupSources))
|
|
if err != nil {
|
|
return errwrap.Wrap(err, "error getting absolute path")
|
|
}
|
|
|
|
var filesEligibleForBackup []string
|
|
if err := filepath.WalkDir(backupPath, func(path string, di fs.DirEntry, err error) error {
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if s.c.BackupExcludeRegexp.Re != nil && s.c.BackupExcludeRegexp.Re.MatchString(path) {
|
|
return nil
|
|
}
|
|
filesEligibleForBackup = append(filesEligibleForBackup, path)
|
|
return nil
|
|
}); err != nil {
|
|
return errwrap.Wrap(err, "error walking filesystem tree")
|
|
}
|
|
|
|
if err := createArchive(filesEligibleForBackup, backupSources, tarFile, s.c.BackupCompression.String(), s.c.GzipParallelism.Int()); err != nil {
|
|
return errwrap.Wrap(err, "error compressing backup folder")
|
|
}
|
|
|
|
s.logger.Info(
|
|
fmt.Sprintf("Created backup of `%s` at `%s`.", backupSources, tarFile),
|
|
)
|
|
return nil
|
|
}
|