[Openstack] Instance IP assignment problem

Emilien Macchi emilien.openstack at gmail.com
Thu May 3 10:09:41 UTC 2012


I share my OVS configuration with you :


root at essex-1:~# ovs-vsctl show
03583d51-03b8-4061-a147-1d892447bee2
    Bridge br-int
        Port "tap21d51768-3c"
            tag: 12
            Interface "tap21d51768-3c"
        Port br-int
            Interface br-int
                type: internal
        Port "gw-2850687f-68"
            tag: 12
            Interface "gw-2850687f-68"
                type: internal
        Port "eth1"
            Interface "eth1"
    ovs_version: "1.4.0+build0"


root at essex-2:~# ovs-vsctl show
3defede8-df1c-4a99-9928-850d9f665194
    Bridge br-int
        Port br-int
            Interface br-int
                type: internal
        Port "tapa8899517-37"
            tag: 12
            Interface "tapa8899517-37"
        Port "eth1"
            Interface "eth1"
    ovs_version: "1.4.0+build0"





Le jeudi 03 mai 2012 à 13:31 +0400, Anton Haldin a écrit :

> 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 at gmail.com> 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 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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