rancher/rancher · error

unable to fetch the manifest blob of %s: %w

Error message

unable to fetch the manifest blob of %s: %w

What it means

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

Source

Thrown at pkg/catalogv2/oci/client.go:167

				return oras.SkipNode
			},
		},
	})
	if err != nil {
		return "", fmt.Errorf("unable to oras copy the remote oci artifact %s: %w", ociURL, err)
	}

	// Helm codebase sets oci artifacts manifest mediatype as ocispecv1.MediaTypeImageManifest
	// https://github.com/oras-project/oras-go/blob/v1/pkg/content/manifest.go#L89C22-L89C44 referenced by helm codebase
	if manifest.MediaType != ocispecv1.MediaTypeImageManifest {
		return "", fmt.Errorf("the oci artifact %s is not a helm chart. The OCI URL must contain only helm charts", ociURL)
	}

	// Fetch the manifest blob of the oci artifact
	manifestblob, err := content.FetchAll(ctx, memoryStore, manifest)
	if err != nil {
		return "", fmt.Errorf("unable to fetch the manifest blob of %s: %w", ociURL, err)
	}
	var manifestJSON ocispecv1.Manifest
	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 {

View on GitHub (pinned to 932558d4e6)

When it happens

Trigger: Thrown at pkg/catalogv2/oci/client.go:167 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/d54d1e9b2ca43f0b. Report an issue: GitHub.