> 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/unable-to-deauthorize-host-package-s-fail-to-be-erased-apt.md).

# Unable to Deauthorize Host - Package(s) Fail to be Erased (Apt)

## Problem

* Deauthorizing a host or hypervisor fails (such as via the UI).
* In */var/log/pf9/hostagent.log* on the host which fails to be deauthorized, it is observed that one or more PF9 packages fail to be removed or erased.

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

```none
209 - pf9_app.py INFO - Removing pf9-neutron-base.3.6.0-1092304 - pf9_app.py INFO - Setting the desired service state353 - pf9_app_db.py ERROR - Erase command failed : sudo /opt/pf9/hostagent/bin/pf9-apt erase pf9-neutron-base. Return code: 1, stdout: , stderr: Traceback (most recent call last)
```

{% endtab %}
{% endtabs %}

* Additionally, connection failures such as the following are also observed – indicating one or more repositories are unreachable.

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

```none
apt.cache.FetchFailedException: W:Failed to fetch http://platform9-neutron.s3-website-us-west-1.amazonaws.com/ubuntu/Release.gpg Connection failed , W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty/Release.gpg Connection failed [IP: 91.189.91.23 80] , W:Failed to fetch http://platform9-neutron.s3-website-us-west-1.amazonaws.com/ubuntu/en Connection failed , W:Failed to fetch http://platform9-neutron.s3-website-us-west-1.amazonaws.com/ubuntu/Packages Connection failed , W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/Release.gpg Connection failed [IP: 91.189.88.162 80]
```

{% endtab %}
{% endtabs %}

## Environment

* Platform9 Managed OpenStack - All Versions
* Ubuntu
* Apt

## Cause

As part of the package erasure process, the **apt-cache** is updated prior to marking a package for removal – to be purged from the system. As such, this requires that the configured Apt repositories be reachable via TCP port(s) 80/443. A firewall or network misconfiguration may be preventing communication to these external repositories.

## Resolution

1. Allow communication to either or both of the aforementioned ports – 80 and 443 – dependent on which protocol is used by the configured repositories. This may be accomplished in many different ways, including leveraging an HTTP(s) proxy or [apt-proxy](https://help.ubuntu.com/community/AptProxy) host within your internal infrastructure (especially if the hosts do not normally have outside connectivity, except to the Platform9 management plane via 443).
2. Attempt the host de-authorization once more.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://platform9.com/kb/pmo/solution/unable-to-deauthorize-host-package-s-fail-to-be-erased-apt.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `build a script that syncs our docs to a CMS` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.