Hi!

Thank you for the update, here is the etherpad I created for Ironic:
https://etherpad.opendev.org/p/ironic-eventlet-removal

Dmitry

On 5/20/25 6:44 PM, Herve Beraud wrote:
> TL;DR: We just passed the milestone 1 of Flamingo and at this point big
> fishes like Neutron, Nova, Glance, and Mistral demonstrated awesome
> progress in their migration. Oslo.service's new backend is now usable in
> real life use cases. Eventlet still suffers from a new version of
> Python. If you have not yet started your migration yet, then, please
> consider starting ASAP before the aircraft crash.
>
> ## OpenStack Updates
>
> Neutron's L3 agent is well on its way to running its WSGI features
> without using Eventlet and activating the new oslo.service threading
> backend at runtime. Allowing to decouple a bit more the needs of
> Eventlet at runtime.
>
> Nova scheduler is now able to start in threading mode without requiring
> any usage of Eventlet at runtime. This was possible by also shifting
> nova-scheduler to the threading backend of oslo.service. More details
> are available here https://gibizer.github.io/categories/eventlet/
> <https://gibizer.github.io/categories/eventlet/>
>
> Activating the new threading backend of oslo.service required devstack
> adaptation to allow having jobs running this execution mode. https://
> review.opendev.org/c/openstack/devstack/+/948436 <https://
> review.opendev.org/c/openstack/devstack/+/948436>. Everybody will be
> able to benefit from these adaptations.
>
> Glance continues its adaptation journey by migrating its functional jobs
> to reduce its needs of Eventlet and to allow it to run jobs in threading
> mode.
>
> oslo.service's new backend is on the way to be landed soon, and is
> waiting for additional reviews. https://review.opendev.org/c/openstack/
> oslo.service/+/945720 <https://review.opendev.org/c/openstack/
> oslo.service/+/945720>
>
> ## Eventlet Updates
>
> Our CI was failing for almost 2 months, we were able to unlock this
> failing CI and hence we were able to merge several blocked reviews.
>
> Last week Eventlet 0.40.0 was released. This new version provides fixes
> around OpenSSL 3.5+.
> The support of Python 3.8 and of PyPy were removed.
>
> The Python 3.13 issues are still not solved and require further work.
>
> ## Call to Action
>
> Flamingo is a crucial series in the realization of global migration of
> OpenStack. We need your involvement to accelerate the progress of this
> initiative!
>
> If your project is affected by Eventlet, now is the time to start your
> migration. Teams are invited to read the migration guide available at
> https://removal.eventlet.org/ <https://removal.eventlet.org/> and are
> encouraged to join the #openstack-eventlet-removal IRC channel to get help.
>
> You'll benefit quickly from the advantages of running your deliverables
> without using Eventlet.
>
> ## Final Thoughts
>
> Postponing the beginning of the migration will put additional pressure
> related to growing runtime failures of Eventlet. We want to prevent this
> from happening to you.
>
> We are now going straight to milestone 2 meaning that we will soon be in
> the middle of Flamingo.
>
> The migration path is now well cleared by all the previous actions and
> changes applied into OpenStack. Do not be afraid by the migration and
> take advantage of the collected experience.
>
> Your journey start here https://removal.eventlet.org/ <https://
> removal.eventlet.org/>
>
> Thanks for reading.
>
> --
> Hervé Beraud
> Principal Software Engineer at Red Hat
> irc: hberaud
> https://github.com/4383/ <https://github.com/4383/>
>