> 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/instance-cannot-contact-metadata-service-ubuntu-16-04.md).

# Instance Cannot Contact Metadata Service (Ubuntu 16.04)

## Problem

* An instance is unable to contact the metadata service via the metadata proxy IP (169.254.169.254) with an error similar to the following.

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

```none
# curl http://169.254.169.254curl: (7) Failed to connect to 169.254.169.254 port 80: No route to host
```

{% endtab %}
{% endtabs %}

* The gateway IP for the metadata proxy route is associated with a reserved DHCP port.
  1. Identify the gateway IP.

```
# route -nKernel IP routing tableDestination Gateway Genmask Flags Metric Ref Use Iface...169.254.169.254 10.0.0.1 255.255.255.255 UGH 0 0 0 ens3
```

```
2. Track the IP down to a Neutron port.
```

```
# openstack port list --network __NETWORK_ID__ --long --fit-width | grep -w 10.0.0.1
```

```
3. Check the device ID of the port.
```

```
# openstack port show __PORT_ID__ -f value -c device_id
```

```
    - The value should be _**reserved\_dhcp\_port**_. If not, you are likely facing a separate issue with that particular DHCP agent.
```

## Environment

* Platform9 Managed OpenStack - All Versions
* Ubuntu 16.04

## Cause

A DHCP agent failover has occurred and thus the IP/route to the Neutron metadata proxy has changed.

## Resolution

1. Remove the route for the metadata proxy IP.

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

```none
# sudo ip route del 169.254.169.254
```

{% endtab %}
{% endtabs %}

2. Run **dhclient**.

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

```none
# dhclient -v
```

{% endtab %}
{% endtabs %}

3. Check that the gateway IP for the 169.254.169.254 route has been updated.

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

```none
# route -n
```

{% endtab %}
{% endtabs %}

4. Ensure that the metadata service is reachable via the proxy IP.

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

```none
# curl http://169.254.169.254
```

{% endtab %}
{% endtabs %}


---

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