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automatically create symlink to latest local backup if configured

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This commit is contained in:
Frederik Ring
2021-10-01 10:07:46 +02:00
parent cff418e735
commit c59b40f2df
4 changed files with 22 additions and 1 deletions
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13
cmd/backup/main.go
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@ -89,6 +89,7 @@ type script struct {
type config struct {
BackupSources string `split_words:"true" default:"/backup"`
BackupFilename string `split_words:"true" default:"backup-%Y-%m-%dT%H-%M-%S.tar.gz"`
BackupLatestSymlink string `split_words:"true"`
BackupArchive string `split_words:"true" default:"/archive"`
BackupRetentionDays int32 `split_words:"true" default:"-1"`
BackupPruningLeeway time.Duration `split_words:"true" default:"1m"`
@ -380,6 +381,16 @@ func (s *script) copyBackup() error {
return fmt.Errorf("copyBackup: error copying file to local archive: %w", err)
}
s.logger.Infof("Stored copy of backup `%s` in local archive `%s`.", s.file, s.c.BackupArchive)
if s.c.BackupLatestSymlink != "" {
symlink := path.Join(s.c.BackupArchive, s.c.BackupLatestSymlink)
if _, err := os.Lstat(symlink); err == nil {
os.Remove(symlink)
}
if err := os.Symlink(name, symlink); err != nil {
return fmt.Errorf("copyBackup: error creating latest symlink: %w", err)
}
s.logger.Infof("Created/Updated symlink `%s` for latest backup.", s.c.BackupLatestSymlink)
}
}
return nil
}
@ -497,7 +508,7 @@ func (s *script) pruneOldBackups() error {
)
}
if fi.ModTime().Before(deadline) {
if fi.Mode() != os.ModeSymlink && fi.ModTime().Before(deadline) {
matches = append(matches, candidate)
}
}