kubernetes/kops · error

error writing file %q: %v

Error message

error writing file %q: %v

What it means

Thrown by writeFileContents when io.Copy from the source resource reader to the temp file fails mid-stream. The write side fails on disk full or I/O errors; the read side fails if the source (URL, secret fetch) errors partway through transferring the contents.

Source

Thrown at upup/pkg/fi/files.go:88

	}

	closeTempFile := true
	deleteTempFile := true
	defer func() {
		if closeTempFile {
			if err := tempFile.Close(); err != nil {
				klog.Warningf("error closing tempfile %q: %v", tempFile.Name(), err)
			}
		}
		if deleteTempFile {
			if err := os.Remove(tempFile.Name()); err != nil {
				klog.Warningf("error removing tempfile %q: %v", tempFile.Name(), err)
			}
		}
	}()

	if _, err := io.Copy(tempFile, in); err != nil {
		return fmt.Errorf("error writing file %q: %v", tempFile.Name(), err)
	}

	if err := tempFile.Chmod(fileMode); err != nil {
		return fmt.Errorf("error setting mode on temp file %q: %w", tempFile.Name(), err)
	}

	if err := tempFile.Close(); err != nil {
		return fmt.Errorf("error closing temp file %q: %w", tempFile.Name(), err)
	}
	closeTempFile = false

	if err := os.Rename(tempFile.Name(), destPath); err != nil {
		return fmt.Errorf("error renaming temp file %q -> %q: %w", tempFile.Name(), destPath, err)
	}
	deleteTempFile = false

	return nil
}

View on GitHub (pinned to 4c8573c808)

Solutions

1. Check disk space on the destination filesystem
2. If the source is remote, verify stable network access and retry the operation
3. Inspect the underlying error to distinguish read-side (source) from write-side (disk) failures

When it happens

Trigger: Thrown at upup/pkg/fi/files.go:88 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of kubernetes/kops@4c8573c808 (2026-09-05). Data as JSON: /api/errors/22e243ccd4cced5c. Report an issue: GitHub.