kubernetes/kops · error

error opening verified image file: %v

Error message

error opening verified image file: %v

What it means

Error "error opening verified image file: %v" thrown in kubernetes/kops.

Source

Thrown at upup/pkg/fi/nodeup/nodetasks/load_image.go:153

	cmd := exec.CommandContext(ctx, "ctr", "version")
	cmd.Stdout = io.Discard
	cmd.Stderr = io.Discard
	return cmd.Run() == nil
}

func importContainerImage(ctx context.Context, url string, expectedHash *hashing.Hash, cacheDir string) error {
	// Phase 1: fetch (or reuse cached) verified bytes. fi.DownloadURL writes via a
	// temp-file + atomic rename and short-circuits if cacheFile already matches the hash,
	// so a re-run of nodeup that already populated the cache skips the network round-trip.
	cacheFile := filepath.Join(cacheDir, expectedHash.Hex()+"_"+utils.SanitizeString(path.Base(url)))
	if _, err := fi.DownloadURL(ctx, url, cacheFile, expectedHash); err != nil {
		return err
	}

	// Phase 2: stream verified bytes (transparently gunzipped) to ctr.
	file, err := os.Open(cacheFile)
	if err != nil {
		return fmt.Errorf("error opening verified image file: %v", err)
	}
	defer file.Close()

	reader, err := maybeGzipReader(file)
	if err != nil {
		return fmt.Errorf("error decoding image archive from %q: %v", url, err)
	}
	defer reader.Close()

	args := []string{"ctr", "--namespace", "k8s.io", "images", "import", "-"}
	human := strings.Join(args, " ")

	klog.Infof("running command %s", human)
	cmd := exec.Command(args[0], args[1:]...)
	cmd.Stdin = reader
	if output, err := cmd.CombinedOutput(); err != nil {
		return fmt.Errorf("%w: error loading docker image with '%s': %v: %s", errCtrImport, human, err, string(output))
	}

View on GitHub (pinned to 4c8573c808)

When it happens

Trigger: Thrown at upup/pkg/fi/nodeup/nodetasks/load_image.go:153 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/f3b33783f604b3da. Report an issue: GitHub.