# pf9-ostackhost Service Failing With Error: "Connection to libvirt failed"

## Problem

* Instance creation is failing.
* The following error is present in / *var/log/pf9/ostackhost.log* on one or more of the hypervisors.

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

```none
INFO nova.virt.libvirt.driver [req-xxxx None None] Connection event '0' reason 'Failed to connect to libvirt'ERROR nova.virt.libvirt.host [req-xxxx None None] Connection to libvirt failed: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Connection refusedfailed: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Connection refused
```

{% endtab %}
{% endtabs %}

Environment

* Platform9 Managed OpenStack - v3.11 and Higher
* Nova
* Libvirt

## Cause

The exact cause is yet to be determined.

## Resolution

1. Stop the ***libvirt-bin*** service.

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

```none
# systemctl stop libvirt-bin.service
```

{% endtab %}
{% endtabs %}

2. Stop the ***libvirt-bin*** socket.

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

```none
# systemctl stop libvirt-bin.socket
```

{% endtab %}
{% endtabs %}

3. Start the ***libvirt-bin*** service.

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

```none
# systemctl start libvirt-bin.service
```

{% endtab %}
{% endtabs %}


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