> For the complete documentation index, see [llms.txt](https://platform9.com/kb/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://platform9.com/kb/pmo/solution/hosts-with-pf9-glance-role-failing-to-converge-with-error-incon.md).

# Hosts With pf9-glance Role Failing To Converge With Error "inconsistent use of tabs and spaces in indentation

## Problem

Hosts with ***pf9-glance*** role fail to converge. The following error is observed in the *glance-api.log*:

{% tabs %}
{% tab title="None" %}

```none
ERROR stevedore.extension [-] Could not load 'cinder': inconsistent use of tabs and spaces in indentation (rbd.py, line 704): File "/opt/pf9/glance/lib/python3.6/site-packages/rbd.py", line 704
```

{% endtab %}
{% endtabs %}

## Environment

* Platform9 Managed OpenStack - v5.0 and below
* *Ceph*
* *Glance*

## Cause

Use of tabs and spaces for indentation in the *rbd.py* file.

## Resolution

1. Add the following environment variables on the *Glance* host.

{% tabs %}
{% tab title="None" %}

```none
LD_LIBRARY_PATH="/opt/pf9/python/pf9-lib:$LD_LIBRARY_PATH"LD_LIBRARY_PATH="/opt/pf9/glance/lib:${LD_LIBRARY_PATH}"export LD_LIBRARY_PATHPYTHONPATH="/opt/pf9/python/lib/python3.6:${PYTHONPATH}"PYTHONPATH="/opt/pf9/glance/lib/python3.6/site-packages:${PYTHONPATH}"export PYTHONPATH
```

{% endtab %}
{% endtabs %}

2\. Install *autopep8* using *pip.*

{% tabs %}
{% tab title="None" %}

```none
~$ /opt/pf9/glance/bin/python /opt/pf9/glance/bin/pip install autopep8==1.5.1
```

{% endtab %}
{% endtabs %}

3\. Correct the formatting issues by running the following command.

{% tabs %}
{% tab title="None" %}

```none
~$ /opt/pf9/python/bin/python /opt/pf9/python/lib/python3.6/site-packages/autopep8.py -i /opt/pf9/glance/lib/python3.6/site-packages/rbd.py
```

{% endtab %}
{% endtabs %}

4\. Restart the ***pf9-glance-api*** service.

{% tabs %}
{% tab title="None" %}

```none
~$ sudo service pf9-glance-api restart~$ service pf9-glance-api status
```

{% endtab %}
{% endtabs %}


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