kubernetes/kops · error

error reading contents of ManagedFile: %v

Error message

error reading contents of ManagedFile: %v

What it means

Render reads the ManagedFile's Contents resource fully into memory via fi.ResourceAsBytes before writing it to storage. If opening or reading the resource fails, the task wraps the error with this message.

Source

Thrown at upup/pkg/fi/fitasks/managedfile.go:165

			return nil, fmt.Errorf("the %q path does not support public ACL", p.Path())
		}
		return acl, nil
	}

	return acls.GetACL(ctx, p, c.T.Cluster)
}

func (_ *ManagedFile) Render(c *fi.CloudupContext, a, e, changes *ManagedFile) error {
	ctx := c.Context()

	location := fi.ValueOf(e.Location)
	if location == "" {
		return fi.RequiredField("Location")
	}

	data, err := fi.ResourceAsBytes(e.Contents)
	if err != nil {
		return fmt.Errorf("error reading contents of ManagedFile: %v", err)
	}

	p, err := getBasePath(c, e)
	if err != nil {
		return err
	}
	p = p.Join(location)

	acl, err := e.getACL(c, p)
	if err != nil {
		return err
	}

	err = p.WriteFile(ctx, bytes.NewReader(data), acl)
	if err != nil {
		return fmt.Errorf("error creating ManagedFile %q: %v", location, err)
	}

View on GitHub (pinned to 4c8573c808)

Solutions

1. Verify the source of Contents (file path, URL, or embedded resource) exists and is readable.
2. Run kops with -v logging to see the underlying %v error after this message for the root cause.
3. Fix permissions or network access to the underlying contents source.

if e.Contents == nil { return fmt.Errorf("ManagedFile %q has no Contents", e.Name) }

if err != nil { return fmt.Errorf("error reading contents of ManagedFile: %w", err) }
// inspect the inner error for open/read root cause

When it happens

Trigger: e.Contents is nil or points to a resource that cannot be opened/read (missing file, failed reader, network-backed resource error) during Render.

Common situations: A cluster addon/spec references a file path or URL for ManagedFile Contents that doesn't exist or is unreachable at apply time.

Related errors

• error creating ManagedFile %q: %v
• error writing Cluster %q: %v
• error writing Cluster: %v
• error listing children of %s: %v
• error reading from %s

AI-assisted analysis of kubernetes/kops@4c8573c808 (2026-09-05). Data as JSON: /api/errors/3bce66c6bac8f4ec. Report an issue: GitHub.