like from the begining ?

Зависит от таймзоны

Скорость ответа да.
А с удобством беда в любом случае.

I'm trying to evaluate the best  architecture to implement in a university (I'm student in a stage). The aims is that one teacher could creates 20 VM in one click for a course, for example. Then I'm studying OpenStack, it's been three weeks that I'm working on it. I learn on how works the modules between them... And now I'm searching the best architecture for this. One architecture that's matching is : Gateway nodes + Compute nodes (with DVR on E/W traffic). Maybe I'm wrong, I don't know tell me, but for the moment it seems to be the matching architecture for the goal

Then in the links where is the architectures described, first of all there is some theorical parts that I don't understand. We can speak about technical details, as using OVN instead of OVS, but first of all I need to know how it works in the big picture

One of my questions about the current architecture : in the gateway nodes : in wich case is used R1 or R2 in the gateway node 1 and in the gateway node 2 ?

I'd just go with simple L3 agents on the dedicated node
you are definetely overengineering this task

they have different weights (priorities)

I see.
My advice is to go with OVS+DVR then.
https://docs.openstack.org/liberty/networking-guide/scenario-dvr-ovs.html

It's most popular and well understood Neutron network architecture. There are tons of blog posts explaining it in even greater details than official documentation (which is quite decent too).

You have picked OVN, which is, of course, very fancy and promoted as a "future" but lacks ready to use examples and requires some experience with Openstack Neutron.

But how it will handle when the network node is dead ?

Я понял, в следующий раз вопросы про keystone policy in code я буду писать на английском 😁

только думал про это
надо было всё это время вопросы на инглише спрашивать, сразу налетают все 🙂

Ну вот, обиделись)

Просто сети эт относительно весело, а политики - занудно. Было б не занудно, все бы с ними уже давно разобрались)

Дык парень с OVN разбирается)

почему-то я решил, что он будет OVS разворачивать

В итоге, я думаю, да)
Но вопрос про OVN.

Is it considered to be simplier than the architecture I talked about before ?

я все сижу на linuxbridge и как-то норм. В чем смысл пересаживания на OVN?