openstack team mailing list archive

[Salman Malik <salmanmk@xxxxxxxx>]

I see. So where do you use private IP's in your setup ?

Thanks,
Salman

Subject: RE: [Openstack] Instance IP assignment problem
From: emilien.openstack@xxxxxxxxx
To: salmanmk@xxxxxxxx
CC: soheil@xxxxxxxxxxxxxx; ahaldin@xxxxxxxxxxxxxxxx; openstack@xxxxxxxxxxxxxxxxxxx
Date: Thu, 3 May 2012 17:02:23 +0200




  
  


Hi Salman,



Le jeudi 03 mai 2012 à 09:47 -0500, Salman Malik a écrit :

    Hi Emilien,

    

    In your configuration you have the following flags:


    --flat_network_bridge=br100


I'm going to try to change it in both servers.




    --floating_range=10.68.5.0/24


That's actually my "public" pool, sot it's not my fixed pool (privates IPs).



After my tests, I will let you know of course.





Thanks,







Regards






    Can you please tell me why you need br100 when you are using br-int with OVS ? Secondly, you seem to use floating_range flag as the second flag. I assume that it is the pool of addresses that your instances will get IP from, right? It may be worthwhile to modify it to fixed_range because Bilal suggested here that this config worked for him. 

    

    Let us know.

    

    Thanks,

    Salman

    

    



    



    



    Date: Thu, 3 May 2012 08:29:42 -0400

    Subject: Re: [Openstack] Instance IP assignment problem

    From: soheil@xxxxxxxxxxxxxx

    To: emilien.openstack@xxxxxxxxx

    CC: ahaldin@xxxxxxxxxxxxxxxx; openstack@xxxxxxxxxxxxxxxxxxx; salmanmk@xxxxxxxx

    



    Oops accidently hit send on my phone.

    



    

    I had a similar problem before. My problem was that the nic driver on the compute instance (your Essex 2) was dropping vlan tags, and then, openvswitch wasn't delivering packets. You can check it using tcpdump -e -vvv.


    

    



    BTW, if you are using virtualbox to run openstack, make sure you are not using vbox intel drivers. Use pcnet fast instead.


    

    



    OVS splinter may also be useful.


    

    



    Hope that helps.


    

    



    Cheers


    Soheil


    

    On Thursday, May 3, 2012, Soheil Hassas Yeganeh wrote:

    
        I had a similar problem before. My problem was that the nic driver on the compute instance (your Essex 2) was dropping vlan tags, and then, openvswitch wasn

        
            can you find dhcp requests by using tcpdump for example ?
        
    


    
        
            

            

        
    


    
        
            sorry for "off-topic" but there may be many reasons of such issue with dhcp. last one for me was old dhcp client(Ubuntu) and udp checksum error. I have essex on centos and was trying ubuntu vm. 
        
    


    
        
            

        
    


    
        
            On Thu, May 3, 2012 at 12:48 PM, Emilien Macchi <emilien.openstack@xxxxxxxxx> wrote:
        
    


    
        
            
                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@xxxxxxxxx

                    To: skible@xxxxxxxxxx

                    CC: salmanmk@xxxxxxxx; openstack@xxxxxxxxxxxxxxxxxxx

                    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@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.