Open Stack

Emilien,

Please see https://answers.launchpad.net/quantum/+question/194111

Nova-compute and nova-network on two different machines seems to be the key here.
Solution is proposed in the above thread.

Hope that helps.

-Mandar

From: openstack-bounces+mandar.vaze=nttdata.com at lists.launchpad.net [mailto:openstack-bounces+mandar.vaze=nttdata.com at lists.launchpad.net] On Behalf Of Emilien Macchi
Sent: Thursday, May 03, 2012 1:26 PM
To: Salman Malik
Cc: openstack at lists.launchpad.net
Subject: Re: [Openstack] Instance IP assignment problem

Hi,


As I told you, I have also a problem for instance IP assignement.


My architecture :

I use Quantum with OVS plugin on 2 servers Essex-1 & Essex-2. Essex-1 runs all services and Essex-2 runs OVS, Quantum-agent & nova-compute only.

You can see more details here<https://github.com/EmilienM/doc-openstack/blob/master/Documentation/How%20to%20setup%20OpenStack%20Essex.pdf>.

My configurations files are here<https://github.com/EmilienM/doc-openstack/tree/master/Configuration%20Files> and in my documentation.



Problem Description :

When an instance is created in ESSEX-1, all is working (network).

But when the VM is started on ESSEX-2, it does not get an IP address. (log file<http://paste.openstack.org/show/14775/>)

I'm sure the problem comes from OVS connection with ESSEX-1.


Do I need to configure something like a trunk or a tunnel between Essex-1 & Essex-2 ?

I miss something in my configuration, if you have any idea...


Regards


Emilien


Le mardi 01 mai 2012 à 14:35 -0500, Salman Malik a écrit :
It may help if you can share the log of your launched instance as well. There is a possibility that we both are having the same issue.
Netstack developers can give a definitive answer to this, but it would be interesting to learn what goes wrong with a launched instance.

Salman


________________________________

Subject: RE: [Openstack] Instance IP assignment problem
From: emilien.openstack at gmail.com<mailto:emilien.openstack at gmail.com>
To: salmanmk at live.com<mailto:salmanmk at live.com>
CC: jorge.delacruz at stackops.com<mailto:jorge.delacruz at stackops.com>; openstack at lists.launchpad.net<mailto:openstack at lists.launchpad.net>
Date: Tue, 1 May 2012 21:26:26 +0200

Le mardi 01 mai 2012 à 14:22 -0500, Salman Malik a écrit :
Regarding L3 gateway, I believe its not necessary to have one (as the VM hasn't obtained an IP right now, so it can't talk to anything outside its net), but I am not sure.
Regarding your problem, do you see any DHCP responses from the DHCP server ? I am asking this because I was having a similar problem earlier where I was getting assigned an IP address no in my desired fixed_network and I believe that was cause by another interfering DHCP server that was replying to discover messages before the nova-network could.
Here my nova.conf and I don't have any interfering DHCP server :

https://github.com/EmilienM/doc-openstack/blob/master/Configuration%20Files/Essex-1/nova.conf


Thanks
Salman


________________________________


Subject: RE: [Openstack] Instance IP assignment problem
From: emilien.openstack at gmail.com<mailto:emilien.openstack at gmail.com>
To: salmanmk at live.com<mailto:salmanmk at live.com>
CC: jorge.delacruz at stackops.com<mailto:jorge.delacruz at stackops.com>; openstack at lists.launchpad.net<mailto:openstack at lists.launchpad.net>
Date: Tue, 1 May 2012 21:06:01 +0200

Hi Salman,


I'm thinking about a networking issue. Where is your L3 gateway in this architecture ? Maybe do you need an ip helper tool to redirect DHCP broadcast ?


What do you think about my problem (follow up to my last e-mail) ?


Thanks


Emilien

Le mardi 01 mai 2012 à 14:00 -0500, Salman Malik a écrit :
Hi,

Here is the error log: http://pastebin.com/KrNZDrvD
and nova.conf: http://pastebin.com/Fvd6dSZs

Emilien, I am trying to get an understanding of how different Quantum plugins work with OpenStack. Ryu plugin is particularly interesting as it uses an OpenFlow controller to configure Vswitches.

The problem I am faced with is  (I think ) that I already have a private network and Quantum should assign IP addresses to instances using DHCP. But instances send out discover message on laucnh but never find a DHCP server (although there are 2 dnsmasqs running).

Any ideas?

Thanks,
Salman


________________________________



Date: Tue, 1 May 2012 20:43:44 +0200
Subject: Re: [Openstack] Instance IP assignment problem
From: jorge.delacruz at stackops.com<mailto:jorge.delacruz at stackops.com>
To: emilien.openstack at gmail.com<mailto:emilien.openstack at gmail.com>
CC: openstack at lists.launchpad.net<mailto:openstack at lists.launchpad.net>; salmanmk at live.com<mailto:salmanmk at live.com>

Hi Emilien and Salman,
Please, could you upload all the files, errors and conf in pastebin or something like that?
I have troubles to open in phone :)
Thank you
El 01/05/2012 20:39, "Emilien Macchi" <emilien.openstack at gmail.com<mailto:emilien.openstack at gmail.com>> escribió:
Hi,


I have a similar problem when I create a network per project_id with Quantum.


My VMs don't get IP and I can't understand why today.

But when I create a private network for all projects, VMs get an IP and all is working well.
Do you have the same problem ?


Salman, I'm interesting about your nova.conf. I can see you are using Ryu ?
Can you tell me more about your "use case" or architecture ?


Thanks


Le mardi 01 mai 2012 à 12:28 -0500, Salman Malik a écrit :
Hi Jorge,

Thanks for looking into the post.
I have made changes to the nova.conf file so that I only use 10.0.0.x network (but the problem is still the same). For this configuration, I assume that it will give out IPs to instances starting from 10.0.0.11. And just to inform you, my eth1 is configured to be 10.0.0.10 (which is a VM itself, and eth1 is configured as a host-only network with no DHCP) and this interface is plugged in the integration bridge used by quantum plugins.

Thanks,
Salman

PS: Error log of a launched instance is also attached.


________________________________




Date: Tue, 1 May 2012 19:03:49 +0200
Subject: Re: [Openstack] Instance IP assignment problem
From: jorge.delacruz at stackops.com<mailto:jorge.delacruz at stackops.com>
To: salmanmk at live.com<mailto:salmanmk at live.com>
CC: openstack at lists.launchpad.net<mailto:openstack at lists.launchpad.net>

Im not really sure but you are using range for your environment 10.0.3.x and 10.0.0.x for fixed.
Can you attach a nova network conf?
Regards
El 01/05/2012 18:56, "Salman Malik" <salmanmk at live.com<mailto:salmanmk at live.com>> escribió:
Hi Guys,

Can anyone provide any insight to the following question:
https://answers.launchpad.net/nova/+question/195439

Thanks,
Salman


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