openstack team mailing list archive

[Bilel Msekni <skible@xxxxxxxxxx>]

Fixed IP or Floating IP ?

From: emilien.openstack@xxxxxxxxx
To: salmanmk@xxxxxxxx
Date: Thu, 3 May 2012 09:55:31 +0200
CC: openstack@xxxxxxxxxxxxxxxxxxx
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@xxxxxxxxx

    To: salmanmk@xxxxxxxx

    CC: jorge.delacruz@xxxxxxxxxxxx; openstack@xxxxxxxxxxxxxxxxxxx

    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@xxxxxxxxx

        To: salmanmk@xxxxxxxx

        CC: jorge.delacruz@xxxxxxxxxxxx; openstack@xxxxxxxxxxxxxxxxxxx

        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@xxxxxxxxxxxx

            To: emilien.openstack@xxxxxxxxx

            CC: openstack@xxxxxxxxxxxxxxxxxxx; salmanmk@xxxxxxxx

            

            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@xxxxxxxxx> 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@xxxxxxxxxxxx

                    To: salmanmk@xxxxxxxx

                    CC: openstack@xxxxxxxxxxxxxxxxxxx

                    

                    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@xxxxxxxx> 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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