diff --git a/registry/storage/driver/s3-aws/s3.go b/registry/storage/driver/s3-aws/s3.go index 40997ee9..43a1a448 100644 --- a/registry/storage/driver/s3-aws/s3.go +++ b/registry/storage/driver/s3-aws/s3.go @@ -15,6 +15,7 @@ import ( "bytes" "context" "crypto/tls" + "errors" "fmt" "io" "io/ioutil" @@ -900,54 +901,71 @@ func (d *driver) copy(ctx context.Context, sourcePath string, destPath string) e return err } -func min(a, b int) int { - if a < b { - return a - } - return b -} - // Delete recursively deletes all objects stored at "path" and its subpaths. // We must be careful since S3 does not guarantee read after delete consistency func (d *driver) Delete(ctx context.Context, path string) error { s3Objects := make([]*s3.ObjectIdentifier, 0, listMax) - - // manually add the given path if it's a file - stat, err := d.Stat(ctx, path) - if err != nil { - return err - } - if stat != nil && !stat.IsDir() { - path := d.s3Path(path) - s3Objects = append(s3Objects, &s3.ObjectIdentifier{ - Key: &path, - }) - } - - // list objects under the given path as a subpath (suffix with slash "/") - s3Path := d.s3Path(path) + "/" + s3Path := d.s3Path(path) listObjectsInput := &s3.ListObjectsV2Input{ Bucket: aws.String(d.Bucket), Prefix: aws.String(s3Path), } -ListLoop: + for { // list all the objects resp, err := d.S3.ListObjectsV2(listObjectsInput) // resp.Contents can only be empty on the first call // if there were no more results to return after the first call, resp.IsTruncated would have been false - // and the loop would be exited without recalling ListObjects + // and the loop would exit without recalling ListObjects if err != nil || len(resp.Contents) == 0 { - break ListLoop + return storagedriver.PathNotFoundError{Path: path} } for _, key := range resp.Contents { + // Skip if we encounter a key that is not a subpath (so that deleting "/a" does not delete "/ab"). + if len(*key.Key) > len(s3Path) && (*key.Key)[len(s3Path)] != '/' { + continue + } s3Objects = append(s3Objects, &s3.ObjectIdentifier{ Key: key.Key, }) } + // Delete objects only if the list is not empty, otherwise S3 API returns a cryptic error + if len(s3Objects) > 0 { + // NOTE: according to AWS docs https://docs.aws.amazon.com/AmazonS3/latest/API/API_ListObjectsV2.html + // by default the response returns up to 1,000 key names. The response _might_ contain fewer keys but it will never contain more. + // 10000 keys is coincidentally (?) also the max number of keys that can be deleted in a single Delete operation, so we'll just smack + // Delete here straight away and reset the object slice when successful. + resp, err := d.S3.DeleteObjects(&s3.DeleteObjectsInput{ + Bucket: aws.String(d.Bucket), + Delete: &s3.Delete{ + Objects: s3Objects, + Quiet: aws.Bool(false), + }, + }) + if err != nil { + return err + } + + if len(resp.Errors) > 0 { + // NOTE: AWS SDK s3.Error does not implement error interface which + // is pretty intensely sad, so we have to do away with this for now. + errs := make([]error, 0, len(resp.Errors)) + for _, err := range resp.Errors { + errs = append(errs, errors.New(err.String())) + } + return storagedriver.Errors{ + DriverName: driverName, + Errs: errs, + } + } + } + // NOTE: we don't want to reallocate + // the slice so we simply "reset" it + s3Objects = s3Objects[:0] + // resp.Contents must have at least one element or we would have returned not found listObjectsInput.StartAfter = resp.Contents[len(resp.Contents)-1].Key @@ -958,24 +976,6 @@ ListLoop: } } - total := len(s3Objects) - if total == 0 { - return storagedriver.PathNotFoundError{Path: path} - } - - // need to chunk objects into groups of 1000 per s3 restrictions - for i := 0; i < total; i += 1000 { - _, err := d.S3.DeleteObjects(&s3.DeleteObjectsInput{ - Bucket: aws.String(d.Bucket), - Delete: &s3.Delete{ - Objects: s3Objects[i:min(i+1000, total)], - Quiet: aws.Bool(false), - }, - }) - if err != nil { - return err - } - } return nil } diff --git a/registry/storage/driver/s3-aws/s3_test.go b/registry/storage/driver/s3-aws/s3_test.go index 1a799106..63e0149f 100644 --- a/registry/storage/driver/s3-aws/s3_test.go +++ b/registry/storage/driver/s3-aws/s3_test.go @@ -782,6 +782,10 @@ func TestMoveWithMultipartCopy(t *testing.T) { } func TestListObjectsV2(t *testing.T) { + if skipS3() != "" { + t.Skip(skipS3()) + } + rootDir, err := ioutil.TempDir("", "driver-") if err != nil { t.Fatalf("unexpected error creating temporary directory: %v", err) diff --git a/registry/storage/driver/storagedriver.go b/registry/storage/driver/storagedriver.go index 9a9b9a8f..caded751 100644 --- a/registry/storage/driver/storagedriver.go +++ b/registry/storage/driver/storagedriver.go @@ -169,3 +169,27 @@ type Error struct { func (err Error) Error() string { return fmt.Sprintf("%s: %s", err.DriverName, err.Enclosed) } + +// Errors provides the envelope for multiple errors +// for use within the storagedriver implementations. +type Errors struct { + DriverName string + Errs []error +} + +var _ error = Errors{} + +func (e Errors) Error() string { + switch len(e.Errs) { + case 0: + return "" + case 1: + return e.Errs[0].Error() + default: + msg := "errors:\n" + for _, err := range e.Errs { + msg += err.Error() + "\n" + } + return msg + } +}