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unable to ping my instance after creating it [closed]

asked 2013-06-12 02:59:04 -0500

nour.nakko gravatar image

updated 2013-06-12 06:15:12 -0500

fifieldt gravatar image


I created an instance using nova create, i have this output with nova list

 ID | Name | Status | Networks |
| 888a8c11-2483-4842-b6cf-75444eee6758 | cirros | ACTIVE | private=

but the problem is that i couldn't ping the ip address

Could you plz help me to solve this issue


when using this command: nova console-log 888a8c11-2483-4842-b6cf-75444eee6758

I notice this error on the log :

udhcpc (v1.18.5) started
Sending discover...
Sending discover...
Sending discover...
No lease, failing
WARN: /etc/rc3.d/S40network failed
cloudsetup: checking
wget: can't connect to remote host ( Network is unreachable
cloudsetup: failed 1/30: up 11.37. request failed
wget: can't connect to remote host ( Network is unreachable
cloudsetup: failed 2/30: up 12.38. request failed

Can u help me to fix this issue

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Closed for the following reason the question is answered, right answer was accepted by koolhead17
close date 2014-06-05 21:22:59.170795

2 answers

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answered 2013-07-31 05:21:28 -0500

Sifty gravatar image

Found this... sorted the issue - hope this helps other noobs out there. Thanks to all for comments.

Gah! Finally figured this out:

Added: iptables -A POSTROUTING -t mangle -p udp --dport 68 -j CHECKSUM --checksum-fill

And now I get leases... talk about obscure...

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Sorry I read your link but I still don't know what to do. Sould I run the command `iptables -A POSTROUTING -t mangle -p udp --dport 68 -j CHECKSUM --checksum-fill ` on the network node, on the compute node (c01), or on the cloud controller node. Or should I run on the instance itselft? Please help

Chien Q. Vu gravatar imageChien Q. Vu ( 2013-08-29 02:16:49 -0500 )edit

This was in relation to using the controller node as a compute node too, so I only added this rule to the controller node in order to use the controller node resources as a compute resource. See this thread for reference to my problem.

Sifty gravatar imageSifty ( 2013-08-30 07:46:37 -0500 )edit

Hi, the link you posted ( is "11.2. Disabling vhost-net", how does this clarify the iptables change, or am i missing something?

n-paladi gravatar imagen-paladi ( 2013-09-18 08:17:03 -0500 )edit

answered 2013-06-14 14:31:37 -0500

james.shimer gravatar image

You need to get DHCP setup. Make sure /etc/quantum/dhcp_agent.ini, matches I would follow one one of the demos from Apendix A.

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So does this mean i have to install Quantum ? - was trying to keep it simple by using openstack-nova-network Is it possible to boot locally launched instances into nova-network configurations ?

Sifty gravatar imageSifty ( 2013-07-31 02:42:19 -0500 )edit

I am really interested in knowing if this possible with nova-network. all i d'like to do is access my instance ( which runs on my compute node ( from my controller node (

Bohr Tyr gravatar imageBohr Tyr ( 2014-01-14 04:40:30 -0500 )edit

Yet same issues , i am not using IP tables on ubuntu . can you guide me how to get VM instance IP ?

Vanathu chinnappan gravatar imageVanathu chinnappan ( 2014-07-18 14:55:24 -0500 )edit

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Asked: 2013-06-12 02:59:04 -0500

Seen: 4,581 times

Last updated: Jul 31 '13