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I would start to check out iptables and routes that are being setup (in
vms and outside).

If you are running a flat (no dhcp) network that usually makes it a lot
harder also.

On 8/9/12 7:31 PM, "Xin Zhao" <xzhao at bnl.gov> wrote:

>Hello,
>
>In my essex install on RHEL6, there is a problem with the metadata
>service.
>The metadata service works for instances running on the controller node,
>where
>the nova-api(metadata service) is running. But for the other worker nodes,
>the metadata service is intermittent, ie. the instances sometimes can
>get its metadata,
>sometime it fails with errors like:
>
>$> curl -v http://169.254.169.254:8775/
>* About to connect() to 169.254.169.254 port 8775 (#0)
>*   Trying 169.254.169.254... Connection timed out
>* couldn't connect to host
>* Closing connection #0
>curl: (7) couldn't connect to host
>
>Any idea where should I start investigating this?
>
>Thanks,
>Xin
>
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