# pf9-ostackhost Service Fails to Connect to Libvirt

## Problem

* The host is reported **offline** in Clarity UI.
* */var/log/pf9/hostagent.log* showsthat ***pf9-ostackhost*** service has failed to start.

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{% tab title="None" %}

```none
815 - pf9_app.py INFO - Setting service state pf9-ostackhost.3.5.0-3246. Command: sudo /etc/init.d/pf9-ostackhost start
```

{% endtab %}
{% endtabs %}

* */var/log/pf9/ostackhost.log* contains the message "Failed to connect socket to /var/run/libvirt/libvirt-sock".

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```none
310 ESC[00;36mINFO nova.service [-ESC[00;36m] ESC[00;36mStarting compute node (version 2013.2.1)322 ESC[00;36mINFO nova.virt.libvirt.driver [-ESC[00;36m] ESC[00;36mConnection event '0' reason 'Failed to connect to libvirt'783 ESC[01;31mERROR nova.virt.libvirt.host [req-e5803ac8-b08f-4d3f-a6c9-93f36f37d0e0 None NoneESC[01;31m] ESC[01;31mConnection to libvirt failed: Failed to connect socket to '/var/run/libvirt/libvirt-sock': No such file or directory
```

{% endtab %}
{% endtabs %}

* */var/log/libvirt/libvirtd.log* contains the message "Unable to bind to port".

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{% tab title="None" %}

```none
794+0000: 20652: info : libvirt version: 1.2.2794+0000: 20652: error : virNetSocketNewListenTCP:311 : Unable to bind to port: Address already in use
```

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* In */var/log/syslog.log,* it is observed that the ***libvirt*** service has stopped and is not able to restart.

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{% tab title="None" %}

```none
kernel: [69549.764040] init: libvirt-bin main process (20652) terminated with status 6kernel: [69549.764068] init: libvirt-bin respawning too fast, stoppedkernel: [69549.766659] init: libvirt-bin post-start process (20663) terminated with status 1​
```

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{% endtabs %}

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```none
# service libvirt-bin status  libvirt-bin stop/waiting
```

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{% endtabs %}

## Environment

* Platform9 Managed OpenStack - v3.5.0 and Higher
* Ubuntu 14.04

## Cause

A stale ***libvirt*** process is holding the lock on the service port.

## Resolution

1. Kill the stale ***libvirtd*** daemon.

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{% tab title="None" %}

```none
# kill [pid]
```

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{% endtabs %}

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

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{% tab title="None" %}

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

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3. Start the ***pf9-ostackhost*** service.

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{% tab title="None" %}

```none
# service pf9-ostackhost start
```

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{% endtabs %}


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