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Hey Ruslanas,

I have a Train deployment using pre-deployed nodes
<https://docs.openstack.org/project-deploy-guide/tripleo-docs/latest/features/deployed_server.html>
and I can verify it actually only uses the control plane network for all
services and has a single IP allocated per node. I am using the
net-config-static-bridge
<https://github.com/openstack/tripleo-heat-templates/blob/master/net-config-static-bridge.j2.yaml>
for
my interfaces. Results my vary with a Nova/Ironic provisioned nodes.

Sincerely,
    Luke Short

On Tue, May 5, 2020 at 9:53 AM Luke Short <ekultails at gmail.com> wrote:

> Hey Ruslanas,
>
> You are be able to customize the networks to all use the same CIDR and set
> different IP allocation pools from within the it. Have a look at this Create
> Network Environment File
> <https://tripleo-docs.readthedocs.io/en/latest/advanced_deployment/network_isolation.html#create-network-environment-file>
> for reference of the parameters you want to change.
>
> That has the disadvantage of allocating many IPs from the same subnet
> when, in theory, you should technically be able to use one. I am not sure
> if/how that is possible in TripleO. The ask we hear from most of our
> operators is usually to allow more separation of networks (not less). I
> hope this helps point you in the right direction!
>
> Sincerely,
>     Luke Short
>
> On Sun, May 3, 2020 at 6:21 PM Ruslanas Gžibovskis <ruslanas at lpic.lt>
> wrote:
>
>> Hi all,
>>
>> I am doing some testing and will do some deployment on some remote hosts.
>>
>> Remote hosts will use provider network only specific for each compute.
>>
>> I was thinking, do I really need all the External, InternalAPI, Storage,
>> StorageManagemnt, Tenant networks provided to all of the nodes? Maybe I
>> could use a Provision network for all of that, and make swift/glance copy
>> on all computes to provide local images.
>>
>> I understand, if I do not have tenant network, all VM's in same project
>> but in different sites, will not see each other, but it is ok at
>> the moment.
>>
>> Thank you for your help
>>
>> --
>> Ruslanas Gžibovskis
>> +370 6030 7030
>>
>
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