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Re: Instance IP assignment problem

To: <emilien.openstack@xxxxxxxxx>
From: Bilel Msekni <skible@xxxxxxxxxx>
Date: Thu, 3 May 2012 10:26:01 +0100
Cc: "openstack@xxxxxxxxxxxxxxxxxxx" <openstack@xxxxxxxxxxxxxxxxxxx>
Importance: Normal
In-reply-to: <1336036264.3556.6.camel@nano>

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@xxxxxxxxx
To: skible@xxxxxxxxxx
CC: openstack@xxxxxxxxxxxxxxxxxxx
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@xxxxxxxxx

    To: skible@xxxxxxxxxx

    CC: salmanmk@xxxxxxxx; openstack@xxxxxxxxxxxxxxxxxxx

    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@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.

                

                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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Follow ups

Re: Instance IP assignment problem
From: Emilien Macchi, 2012-05-03

References

Instance IP assignment problem
From: Salman Malik, 2012-05-01
Re: Instance IP assignment problem
From: Jorge de la Cruz, 2012-05-01
Re: Instance IP assignment problem
From: Salman Malik, 2012-05-01
Re: Instance IP assignment problem
From: Emilien Macchi, 2012-05-01
Re: Instance IP assignment problem
From: Jorge de la Cruz, 2012-05-01
Re: Instance IP assignment problem
From: Salman Malik, 2012-05-01
Re: Instance IP assignment problem
From: Emilien Macchi, 2012-05-01
Re: Instance IP assignment problem
From: Salman Malik, 2012-05-01
Re: Instance IP assignment problem
From: Emilien Macchi, 2012-05-01
Re: Instance IP assignment problem
From: Salman Malik, 2012-05-01
Re: Instance IP assignment problem
From: Emilien Macchi, 2012-05-03
Re: Instance IP assignment problem
From: Bilel Msekni, 2012-05-03
Re: Instance IP assignment problem
From: Emilien Macchi, 2012-05-03
Re: Instance IP assignment problem
From: Bilel Msekni, 2012-05-03
Re: Instance IP assignment problem
From: Emilien Macchi, 2012-05-03
Re: Instance IP assignment problem
From: Bilel Msekni, 2012-05-03
Re: Instance IP assignment problem
From: Emilien Macchi, 2012-05-03