---
name: containers-ts-storage-cos-plugin-dep
title: Why do I see a volume mounting error when using the IBM Cloud Object Storage plug-in?
description: When deploying an app that uses the COS plug-in, you see an error message similar to the following example.
last-updated: 2026-04-30
---

> ## Documentation Index
> The table of contents for this documentation set is at https://cloud.ibm.com/docs/containers?format=markdown
> The index for all IBM Cloud docs is at: https://cloud.ibm.com/docs/llms.txt
> Use these files to discover more information as needed.

# Why do I see a volume mounting error when using the IBM Cloud Object Storage plug-in?
{: #ts-cos-storage-dep}

When deploying an app that uses the COS plug-in, you see an error message similar to the following example.
{: tsSymptoms}

```sh
Error mounting volume: s3fs mount failed: s3fs: error while loading shared libraries: libfuse.so.2: cannot open shared object file: No such file or directory
```
{: screen}

The plug-in version that you are using is deprecated. Update your COS plug-in to a supported version.
{: tsCauses}

Follow the steps to update the COS plug-in.
{: tsResolve}

1. Check your plug-in version by running the following command.

    ```sh
    kubectl get deploy ibmcloud-object-storage-plugin -n ibm-object-s3fs -oyaml | grep productVersion
    ```
    {: pre}

1. Review the [change log](https://cloud.ibm.com/docs/containers?topic=containers-cos_plugin_changelog&format=markdown) for the latest version information.

1. Update the COS plug-in. For more information, see [Updating the IBM Cloud Object Storage plug-in](https://cloud.ibm.com/docs/containers?topic=containers-storage_cos_install&format=markdown#update_cos_plugin).

1. If the issue persists, contact support. Open a [support case](https://cloud.ibm.com/docs/support?topic=support-using-avatar&format=markdown). In the case details, be sure to include any relevant log files, error messages, or command outputs.


The COS plug-in is now available as a managed add-on. If you are using the COS plug-in Helm chart, consider migrating to the add-on. For more information, see [Enabling the IBM Cloud Object Storage add-on](https://cloud.ibm.com/docs/containers?topic=containers-storage-cos-install-addon&format=markdown#enable-cos-addon) and [Migrating from the Helm plug-in to the cluster add-on](https://cloud.ibm.com/docs/containers?topic=containers-storage-cos-install-addon&format=markdown#cos-addon-migrate-helm).
{: tip}