[Openstack-mentoring] Neutron subnet with DHCP relay - continued

Thomas King thomas.king at gmail.com
Wed Jul 15 21:33:35 UTC 2020


That helps a lot, thank you!

"I use only one network..."
This bit seems to go completely against the Neutron segments documentation.
When you have access, please let me know if Triple-O is using segments or
some other method.

I greatly appreciate this, this is a tremendous help.

Tom King

On Wed, Jul 15, 2020 at 1:07 PM Ruslanas Gžibovskis <ruslanas at lpic.lt>
wrote:

> Hi Thomas,
>
> I have a bit complicated setup from tripleo side :) I use only one network
> (only ControlPlane). thanks to Harold, he helped to make it work for me.
>
> Yes, as written in the tripleo docs for leaf networks, it use the same
> neutron network, different subnets. so neutron network is ctlplane (I
> think) and have ctlplane-subnet, remote-provision and remote-KI :)) that
> generates additional lines in "ip r s" output for routing "foreign" subnets
> through correct gw, if you would have isolated networks, by vlans and ports
> this would apply for each subnet different gw... I believe you
> know/understand that part.
>
> remote* subnets have dhcp-relay setup by network team... do not ask
> details for that. I do not know how to, but can ask :)
>
>
> in undercloud/tripleo i have 2 dhcp servers, one is for introspection,
> another for provide/cleanup and deployment process.
>
> all of those subnets have organization level tagged networks and are
> tagged on network devices, but they are untagged on provisioning
> interfaces/ports, as in general pxe should be untagged, but some nic's can
> do vlan untag on nic/bios level. but who cares!?
>
> I just did a brief check on your first post, I think I have simmilar setup
> to yours :)) I will check in around 12hours :)) more deaply, as will be at
> work :)))
>
>
> P.S. sorry for wrong terms, I am bad at naming.
>
>
> On Wed, 15 Jul 2020, 21:13 Thomas King, <thomas.king at gmail.com> wrote:
>
>> Ruslanas, that would be excellent!
>>
>> I will reply to you directly for details later unless the maillist would
>> like the full thread.
>>
>> Some preliminary questions:
>>
>>    - Do you have a separate physical interface for the segment(s) used
>>    for your remote subnets?
>>    The docs state each segment must have a unique physical network name,
>>    which suggests a separate physical interface for each segment unless I'm
>>    misunderstanding something.
>>    - Are your provisioning segments all on the same Neutron network?
>>    - Are you using tagged switchports or access switchports to your
>>    Ironic server(s)?
>>
>> Thanks,
>> Tom King
>>
>> On Wed, Jul 15, 2020 at 12:26 AM Ruslanas Gžibovskis <ruslanas at lpic.lt>
>> wrote:
>>
>>> I have deployed that with tripleO, but now we are recabling and
>>> redeploying it. So once I have it running I can share my configs, just name
>>> which you want :)
>>>
>>> On Tue, 14 Jul 2020 at 18:40, Thomas King <thomas.king at gmail.com> wrote:
>>>
>>>> I have. That's the Triple-O docs and they don't go through the normal
>>>> .conf files to explain how it works outside of Triple-O. It has some ideas
>>>> but no running configurations.
>>>>
>>>> Tom King
>>>>
>>>> On Tue, Jul 14, 2020 at 3:01 AM Ruslanas Gžibovskis <ruslanas at lpic.lt>
>>>> wrote:
>>>>
>>>>> hi, have you checked:
>>>>> https://docs.openstack.org/project-deploy-guide/tripleo-docs/latest/features/routed_spine_leaf_network.html
>>>>>  ?
>>>>> I am following this link. I only have one network, having different
>>>>> issues tho ;)
>>>>>
>>>>
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