[Openstack] Instance IP assignment problem
Bilel Msekni
skible at hotmail.fr
Thu May 3 09:26:01 UTC 2012
Basing on your architecture picture , I think you mean ping VM that resides on Essex 2 from server containing Essex 1I had a similar networking problem and i honestly don't know i fixed it ( didn't enable tunneling) , this is what i did1- ifconfig eth0 0.0.0.02- dhclient br-int ( normally the bridge will take the address of eth0)
and pinging went back to working fine but i am still testing if there are any side effectsTry it out and txt me !
btw , i used your ubuntu 12.04 LTS cloud img and i can't seem to ping it but when i choose another image ( the default tty for example) it ping as a charm , probably you should pick another image !
Subject: RE: [Openstack] Instance IP assignment problem
From: emilien.openstack at gmail.com
To: skible at hotmail.fr
CC: openstack at lists.launchpad.net
Date: Thu, 3 May 2012 11:11:04 +0200
Ok :
http://paste.openstack.org/show/14797/
I know where is the problem but I dont know yet how to fix it :
- Quantum creates TAP interface on ESSEX-2
- From ESSEX-2, I can't ping VMs on ESSEX-1
Here my ovs_quantum_plugin.ini :
[DATABASE]
sql_connection = mysql://ovs_quantum:password@10.68.1.40:3306/ovs_quantum
[OVS]
integration-bridge = br-int
[AGENT]
root_helper = sudo
Do we need enable bridge ?
Le jeudi 03 mai 2012 à 10:00 +0100, Bilel Msekni a écrit :
èmm , can you do this on your instance : nova show %instance_Id so that i may see the problem in the resume of spawning ?
and are you sure you have enough fixed ip addresses left for use ?
The configuration of nova and quantum is almost the same as me and the instances are getting Fixed Ips without any problem !
Subject: RE: [Openstack] Instance IP assignment problem
From: emilien.openstack at gmail.com
To: skible at hotmail.fr
CC: salmanmk at live.com; openstack at lists.launchpad.net
Date: Thu, 3 May 2012 10:48:43 +0200
All seems alright but not working yet.
http://paste.openstack.org/show/14791/
I have executed on both servers :
ovs-vsctl add-port br-int eth1
Need I do something else ?
How the DHCP is working in this case ?
Le jeudi 03 mai 2012 à 09:29 +0100, Bilel Msekni a écrit :
Then the problem isn't in the instance but in the nova-network service , please check if it is working well
as well as give us the output log when you attempt to create a new instance.
Subject: RE: [Openstack] Instance IP assignment problem
From: emilien.openstack at gmail.com
To: skible at hotmail.fr
CC: salmanmk at live.com; openstack at lists.launchpad.net
Date: Thu, 3 May 2012 10:21:37 +0200
Fixed IP
Le jeudi 03 mai 2012 à 09:15 +0100, Bilel Msekni a écrit :
Fixed IP or Floating IP ?
From: emilien.openstack at gmail.com
To: salmanmk at live.com
Date: Thu, 3 May 2012 09:55:31 +0200
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.
My configurations files are here 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)
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
To: salmanmk at live.com
CC: jorge.delacruz at stackops.com; 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
To: salmanmk at live.com
CC: jorge.delacruz at stackops.com; 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
To: emilien.openstack at gmail.com
CC: openstack at lists.launchpad.net; 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> 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
To: salmanmk at live.com
CC: 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> 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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