Hi all,

I’m working on a production deployment using OpenStack (Kolla Ansible 2023.1) and Ceph (via Ceph Ansible).

Setup Overview:

One control plane with shared core services.
Multiple availability zones (AZs), each as a separate Nova Cell.
Each AZ has its own Ceph cluster, connected via RBD mirroring for DC/DR.

Architecture diagram is attached below

Looking for advice on:

Best practices for this architecture.
Ceph RBD mirroring impact on Glance, Cinder, Nova.
Suggestions for high availability and failover strategies in this design.

Appreciate any guidance or references!

Thanks & regards

Thamanna Farhath N

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