kubernetes/kops · error

error setting file mode for %q: %v

Error message

error setting file mode for %q: %v

What it means

Thrown by EnsureFileMode when the file's current permission bits differ from the desired mode and os.Chmod fails while trying to fix them. Usually a permissions problem: the running user owns neither the file nor effective rights to change its mode, or the filesystem rejects chmod.

Source

Thrown at upup/pkg/fi/files.go:121

	deleteTempFile = false

	return nil
}

func EnsureFileMode(destPath string, fileMode os.FileMode) (bool, error) {
	changed := false
	stat, err := os.Lstat(destPath)
	if err != nil {
		return changed, fmt.Errorf("error getting file mode for %q: %v", destPath, err)
	}
	if (stat.Mode() & os.ModePerm) == fileMode {
		return changed, nil
	}
	klog.Infof("Changing file mode for %q to %s", destPath, fileMode)

	err = os.Chmod(destPath, fileMode)
	if err != nil {
		return changed, fmt.Errorf("error setting file mode for %q: %v", destPath, err)
	}
	changed = true
	return changed, nil
}

func fileHasHash(f string, expected *hashing.Hash) (bool, error) {
	actual, err := expected.Algorithm.HashFile(f)
	if err != nil {
		if os.IsNotExist(err) {
			return false, nil
		}
		return false, err
	}

	if actual.Equal(expected) {
		klog.V(2).Infof("Hash matched for %q: %v", f, expected)
		return true, nil
	}

View on GitHub (pinned to 4c8573c808)

Solutions

1. Check ownership of the file and adjust with chown, or run the operation as a user allowed to chmod it
2. Verify the desired mode is valid for the filesystem
3. If the mode mismatch is acceptable, align the spec's file mode with the existing one

When it happens

Trigger: Thrown at upup/pkg/fi/files.go:121 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/ad6873aef53e8d36. Report an issue: GitHub.