rancher/rancher · error

unable to fetch chart blob of %s: %w

Error message

unable to fetch chart blob of %s: %w

What it means

Error "unable to fetch chart blob of %s: %w" thrown in rancher/rancher.

Source

Thrown at pkg/catalogv2/oci/client.go:188

	err = json.Unmarshal(manifestblob, &manifestJSON)
	if err != nil {
		return "", fmt.Errorf("unable to unmarshal manifest blob of %s: %w", ociURL, err)
	}

	// Create a temp file to store the helm chart tar
	tempFile, err := os.CreateTemp("", "helm-")
	if err != nil {
		return "", fmt.Errorf("unable to create temp file for storing the oci artifact")
	}

	// Checking if the OCI artifact is of type helm config ?
	if manifestJSON.ArtifactType == helmregistry.ConfigMediaType || manifestJSON.Config.MediaType == helmregistry.ConfigMediaType {
		// find the layer of helm chart type and fetch it
		for _, layer := range manifestJSON.Layers {
			if layer.MediaType == helmregistry.ChartLayerMediaType {
				chartTar, err := content.FetchAll(ctx, memoryStore, layer)
				if err != nil {
					return "", fmt.Errorf("unable to fetch chart blob of %s: %w", ociURL, err)
				}

				err = os.WriteFile(tempFile.Name(), chartTar, 0o600)
				if err != nil {
					return "", fmt.Errorf("unable to write chart %s into file %s: %w", ociURL, tempFile.Name(), err)
				}

				return tempFile.Name(), nil
			}
		}
	}

	return tempFile.Name(), fmt.Errorf("the oci artifact %s is not a helm chart. The OCI URL must contain only helm charts", ociURL)
}

// getAuthClient creates an oras auth client that can be used
// in creating an oras registry client or oras repository client.
func (o *Client) SetAuthClient() error {

View on GitHub (pinned to 932558d4e6)

When it happens

Trigger: Thrown at pkg/catalogv2/oci/client.go:188 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of rancher/rancher@932558d4e6 (2026-08-16). Data as JSON: /api/errors/f0bf9b38aee45d53. Report an issue: GitHub.