openstack team mailing list archive

[Leander Bessa Beernaert <leanderbb@xxxxxxxxx>]

Do i also no ip_forward enabled on the controller node?

On Wed, Sep 5, 2012 at 3:18 PM, Leander Bessa Beernaert <leanderbb@xxxxxxxxx
> wrote:

> All compute nodes have /proc/sys/net/ipv4/ip_forward set to 1. So that
> can't be the issue :s
>
>
> On Wed, Sep 5, 2012 at 3:11 PM, George Mihaiescu <George.Mihaiescu@xxxxxx>wrote:
>
>> **
>>
>> Hi Leander,****
>>
>> ** **
>>
>> Make sure you have ip forward enabled on the nova-compute nodes (that now
>> act as nova-network as well).****
>>
>> Second, each nova-network acts as a gateway for each project and it needs
>> an IP address, so probably this explains the “phantom” 10.0.108.4,
>> 10.0.108.6, 10.0.108.8 and 10.0.108.4.10 addresses.****
>>
>> ** **
>>
>> George****
>>
>> ** **
>>  ------------------------------
>>
>> *From:* openstack-bounces+george.mihaiescu=q9.com@xxxxxxxxxxxxxxxxxxx[mailto:
>> openstack-bounces+george.mihaiescu=q9.com@xxxxxxxxxxxxxxxxxxx] *On
>> Behalf Of *Leander Bessa Beernaert
>> *Sent:* Wednesday, September 05, 2012 9:49 AM
>> *To:* Vishvananda Ishaya
>> *Cc:* openstack@xxxxxxxxxxxxxxxxxxx
>> *Subject:* Re: [Openstack] [OpenStack][Nova]Problems and questions
>> regarding network and/or routing****
>>
>> ** **
>>
>> I'm having the strangest issue. I have set up a separate OpenStack
>> cluster to test out the multi-host setup. ****
>>
>> ** **
>>
>> I have one controller node and 4 compute nodes. Each compute node is
>> running nova-network, nova-compute and nova-api-metadata. I have set up a
>> tenant with the a multi-host network on the address range 10.0.108.0/24.
>> ****
>>
>> ** **
>>
>> I launched 4 instances to fill up the compute nodes:****
>>
>> ** **
>>
>>
>> +--------------------------------------+------+--------+----------------------------+
>> ****
>>
>> |                  ID                  | Name | Status |
>>  Networks          |****
>>
>>
>> +--------------------------------------+------+--------+----------------------------+
>> ****
>>
>> | 2c63cc3e-7c45-4e10-8ac5-480fa60d4f32 | Test | ACTIVE |
>> project_network=10.0.108.7 |****
>>
>> | c48f6aae-0d97-4e69-a398-8cda929c310d | Test | ACTIVE |
>> project_network=10.0.108.3 |****
>>
>> | ed8f11a4-5fc0-4437-9ae2-b6725126fca7 | Test | ACTIVE |
>> project_network=10.0.108.5 |****
>>
>> | fe39e586-030c-4bf4-9020-7ef773567913 | Test | ACTIVE |
>> project_network=10.0.108.9 |****
>>
>>
>> +--------------------------------------+------+--------+----------------------------+
>> ****
>>
>> ** **
>>
>> One thing i found odd at the beginning was the fact that the instances
>> are using only odd addresses. **The** installation is clean and no
>> instances have been launched before, so all the addresses are available.
>> ****
>>
>> ** **
>>
>> **The** problem now is that i can only ping instances form the compute
>> nodes. I am unable to ping any instance from the controller node. Stranger
>> yet, is the fact that i can ping non-existent address such as
>> 10.0.108.4,10.0.108.6,10.0.108.8 and 10.0.108.4.10. ****
>>
>> I have also no connectivity from within the instances to the outside
>> world.****
>>
>> ** **
>>
>> Has this happend to anyone before?****
>>
>> ** **
>>
>> ** **
>>
>> On Tue, Sep 4, 2012 at 11:38 PM, Vishvananda Ishaya <
>> vishvananda@xxxxxxxxx> wrote:****
>>
>> ** **
>>
>> On Sep 4, 2012, at 3:01 PM, Leander Bessa Beernaert <leanderbb@xxxxxxxxx>
>> wrote:****
>>
>>
>>
>> ****
>>
>> Question follows inlined below.****
>>
>> On Tue, Sep 4, 2012 at 6:48 PM, Vishvananda Ishaya <vishvananda@xxxxxxxxx>
>> wrote:****
>>
>> ** **
>>
>> On Sep 4, 2012, at 8:35 AM, Leander Bessa Beernaert <leanderbb@xxxxxxxxx>
>> wrote:****
>>
>>
>>
>> ****
>>
>> Hello all,****
>>
>> ** **
>>
>> I've had a few reports from users testing out the sample installation of
>> OpenStack  i setup. **The** reports were all related to problems with
>> inter-vm network speeds and connection timeouts as well as the inability to
>> connect to the outside word from within the VM (e.g.: ping www.google.com). I'm
>> not sure if i setup something wrong, so i have a few questions.****
>>
>> ** **
>>
>> **The** current installation of OpenStack is running with 1 controller
>> node, and 8 compute nodes. Each node is running Ubuntu 12.04 and Essex with
>> the default packages. I'm using the VLAN network manager. **The**re is
>> one peculiarity to this setup. Since each physical hosts only has 1 network
>> interface,  i came up with the following configuration:****
>>
>>   - For inter-node communications i set up  a VLAN with the ID 107****
>>
>>   - Each tentant has it's private network on a separate VLAN. Currently
>> there are two tenant, one on VLAN 109 (network: 10.0.9.0/24) and another
>> on VLAN 110 (network: 10.0.9.0/24). ****
>>
>> ** **
>>
>> I'm not a network expert, so please bear with me if i make any outrages
>> statements. ****
>>
>> ** **
>>
>> 1) When communicating on the private network, the packets are not routed
>> through the controller right? That only happens when the VM needs to
>> contact an external source (e.g.: google), correct? This report originated
>> from users from VLAN 109. **The**y are using network intensive
>> applications which send a lot of data between each of the instances. **
>> The**y reported various time-out and connection drops as well as slow
>> transfer speeds. I'm no network expert, but could this be related to the
>> routing, VLANs or is it a hardware issue?****
>>
>> ** **
>>
>> **The**re are a lot of things that could cause this. You would need to
>> do some extensive debugging to find the source of this.****
>>
>> ** **
>>
>> Any ideas where i can start looking? ****
>>
>> Also, communications between two VMs on different compute nodes from the
>> same tenant do not need to be routed through the controller node right?**
>> **
>>
>> ** **
>>
>> in non-multi_host mode I believe it will go through the controller.****
>>
>> ** **
>>
>> Vish****
>>
>> ** **
>>
>>
>>
>> ****
>>
>> ** **
>>
>> -- ****
>>
>> Cumprimentos / Regards,****
>>
>> Leander****
>>
>
>
>
> --
> Cumprimentos / Regards,
> Leander
>



-- 
Cumprimentos / Regards,
Leander