Hey folks.

Does anyone have ideas on how to interconnect different Openstack deployments?
Consider that we have multiple Datacenters and need to interconnect tenant networks. How could this be done in the context of OpenStack (without using VPN) ?

We have some ideas about the usage of OVN-IC (OVN Interconnect). It looks like a great solution to create a network layer between DCs/AZs with the help of the OVN driver. However, Neutron does not support the Transit Switches (OVN-IC design) that are required for this application.

We've seen references to abandoned projects like [1] [2] [3].

Does anyone use something similar in production or have an idea about how to do it? Imagine that we need to put workloads on two different AZs that run different Openstack installations, and we want to communicate with the local networks without using a FIP.

I believe that the most coherent way to maintain databases consistent in each Openstack would be an integration with Neutron, but I haven't seen any movement on that.

Regards,
Roberto

[1] https://www.youtube.com/watch?v=GizLmSiH1Q0
[2] https://specs.openstack.org/openstack/neutron-specs/specs/stein/neutron-interconnection.html
[3] https://opendev.org/x/neutron-interconnection

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