We’re excited to share the latest updates on our ongoing efforts to phase out Eventlet across our various OpenStack projects. Below you’ll find a summary of our progress, key milestones, and important dates to keep in mind as we move forward with this critical initiative. ## Current Status We’ve completed the initial analysis phase across more than 120 OpenStack projects. This includes identifying the various patterns where Eventlet is currently in use and evaluating where it can be safely removed or disabled. Here are some highlights: - Completed Analysis: Projects where Eventlet is used include (but are not limited to): Aodh, Barbican, Nova, Neutron, Tacker, Taskflow, Trove, Venus, Watcher, and Zun. - Eventlet Optional: Several projects have been identified where Eventlet seems to be optional and can be disabled with minimal impact. For these projects, we will move forward the discussion with teams to try deactivating Eventlet in upcoming updates. Once done, projects of this kind would be able to start their migration with more serenity. - Eventlet Required: Some projects still rely heavily on Eventlet for core functionality. For these, we are going to develop specific migration plans. ## Migration Plans in Progress - oslo.db: Preparing its Asyncio based engine facade; - oslo.service: Refactoring plans being discussed to minimize disruption during the migration; - glance: Refactoring code to use native thread model rather than Eventlet More details can be found here: https://review.opendev.org/q/topic:%22eventlet-removal%22 ## Latest Updates - Community Goal Transition: The ongoing community goal for removing Eventlet is now in the process of becoming an official "selected" goal, https://review.opendev.org/c/openstack/governance/+/931254. - Pattern Identification Completed: We’ve identified key patterns related to Eventlet usage, including its common integration with monkey_patch(), eventlet.Timeout, eventlet.GreenPool, and eventlet.wsgi.server(). Visit the official wiki to get more details https://wiki.openstack.org/wiki/Eventlet-removal#Identifying_Common_Pattern ## Important Dates - October 21st: cross PTG session. - October 23rd: cross PTG session (Q&A session and Open Discussion session) ## Call to Action We need your involvement to accelerate the progress of this initiative! If your project is affected by Eventlet, now is the time to start planning your migration. Teams are encouraged to take immediate steps in assessing how to deactivate Eventlet or to transition to alternative solutions. We defined key roles and responsibilities. Those will help us to lower the cost of the migration for our community. Teams are invited to assign them now. Being ready as soon as possible will allow you to better take advantage of the coming PTG sessions. Please find more details about these roles and their short terms tasks: https://wiki.openstack.org/wiki/Eventlet-removal#Roles_and_Responsibilities ## Final Thoughts This is a significant step forward for improving the stability, scalability, and maintainability of our projects. With your continued support, we’re confident that this migration will bring substantial benefits to the OpenStack community. If there are any questions or if you need assistance with your project’s transition away from Eventlet, please join the discussion on the #eventlet-removal channels (OpenStack irc, RedHat slack, mailing list). Thank you for your dedication and hard work! -- Hervé Beraud Senior Software Engineer at Red Hat irc: hberaud https://github.com/4383/