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retention.go
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retention.go
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package service
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"sort"
"time"
"github.com/swisscom/backman/log"
"github.com/swisscom/backman/service/util"
)
func (s *Service) RetentionCleanup(service util.Service) error {
localPath := filepath.Join(service.LocalBackupPath, service.Label, service.Name)
folderPath := fmt.Sprintf("%s/%s/", service.Label, service.Name)
objects, err := s.S3.List(folderPath)
if err != nil {
return err
}
log.Infof("running retention cleanup of [%s] backups", folderPath)
// remove if too old
for _, object := range objects {
if time.Since(object.LastModified) > time.Duration(service.Retention.Days)*time.Hour*24 {
if err := s.S3.Delete(object.Key); err != nil {
return err
}
}
}
// cleanup local files too
if len(service.LocalBackupPath) > 0 {
files, err := ioutil.ReadDir(localPath)
if err != nil {
return err
}
for _, file := range files {
if time.Since(file.ModTime()) > time.Duration(service.Retention.Days)*time.Hour*24 {
log.Debugf("deleting old backup file [%s] ...", filepath.Join(localPath, file.Name()))
if err := os.Remove(filepath.Join(localPath, file.Name())); err != nil {
return err
}
}
}
}
// remove if too many files
sort.Slice(objects, func(i, j int) bool {
return objects[i].LastModified.Before(objects[j].LastModified)
})
if len(objects) > service.Retention.Files {
for i := 0; i < len(objects)-service.Retention.Files; i++ {
if err := s.S3.Delete(objects[i].Key); err != nil {
return err
}
}
}
// cleanup local files too
if len(service.LocalBackupPath) > 0 {
files, err := ioutil.ReadDir(filepath.Join(service.LocalBackupPath, service.Label, service.Name))
if err != nil {
return err
}
sort.Slice(files, func(i, j int) bool {
return files[i].ModTime().Before(files[j].ModTime())
})
if len(files) > service.Retention.Files {
for i := 0; i < len(files)-service.Retention.Files; i++ {
log.Debugf("deleting superfluous backup file [%s] ...", filepath.Join(localPath, files[i].Name()))
if err := os.Remove(filepath.Join(localPath, files[i].Name())); err != nil {
return err
}
}
}
}
return nil
}