I’ll “pour one out” for our friend, LinuxBridge. It served us well for many, many, years - but the future looks much brighter with OVN! Thanks for the heads up! -- James Denton Principal Architect Rackspace Private Cloud - OpenStack james.denton@rackspace.com From: Brian Haley <haleyb.dev@gmail.com> Date: Tuesday, January 14, 2025 at 1:40 PM To: openstack-discuss@lists.openstack.org <openstack-discuss@lists.openstack.org> Subject: [neutron][upgrades] Linuxbridge driver removal and migration CAUTION: This message originated externally, please use caution when clicking on links or opening attachments! Hi Stackers, In 2022, during the Zed cycle, the Neutron team took a step at marking some items as experimental. One of those was the Linuxbridge driver. The reason was due to it being unmaintained for a number of cycles, and no one was able to take on its ownership. The implication of this decision was that it was consider deprecated, even if not given an official warning message. In doing this, all gate jobs were moved into the experimental queue, feature-parity with other drivers was deemed unnecessary, and bug fixing was considered best-effort. Since then, both major distros have stopped supporting new deployments using Linuxbridge, and have been mainly focused on OVN. So what does this mean? We (the neutron cores) have come to the conclusion that it is time to take the next step and remove the code from the tree [1]. After 5 cycles of being considered experimental without any investment it just makes sense. We plan on doing this in the current Epoxy cycle. We realize that there are still deployments using Linuxbridge, and hopefully they have been looking at migration strategies since we originally marked the code experimental. This email is another push to the user community to start looking at this, especially if you are planning any new deployments. There has been at least one migration guide written at [2] (thanks Jim!), and at this point I would encourage those still using Linuxbridge to look at it and start asking any questions they have so we have the chance to make it better and can make that process easier. Thanks for reading, -Brian, Neutron PTL [0] https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Freview.opendev.org%2Fc%2Fopenstack%2Fneutron%2F%2B%2F845181&data=05%7C02%7Cjames.denton%40rackspace.com%7C6b4a0414dd644beebe7008dd34d35711%7C570057f473ef41c8bcbb08db2fc15c2b%7C0%7C0%7C638724804492149410%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=iMcDJmj2HAtgPtVXvX%2Fr3h%2BhT9ksobJGAKoblCnJI8Q%3D&reserved=0<https://review.opendev.org/c/openstack/neutron/+/845181> [1] https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Freview.opendev.org%2Fc%2Fopenstack%2Fneutron%2F%2B%2F927216&data=05%7C02%7Cjames.denton%40rackspace.com%7C6b4a0414dd644beebe7008dd34d35711%7C570057f473ef41c8bcbb08db2fc15c2b%7C0%7C0%7C638724804496789930%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=enekNidXn82OGnyBFDcrqMSOxNPzbZFIzDCo22WWEUw%3D&reserved=0<https://review.opendev.org/c/openstack/neutron/+/927216> [2] https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.jimmdenton.com%2Fmigrating-lxb-to-ovn%2F&data=05%7C02%7Cjames.denton%40rackspace.com%7C6b4a0414dd644beebe7008dd34d35711%7C570057f473ef41c8bcbb08db2fc15c2b%7C0%7C0%7C638724804496808486%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=iP4PnCPlnSHC1%2FO6XHMKVgVflse1rP4jt0X%2BcCjTI7A%3D&reserved=0<https://www.jimmdenton.com/migrating-lxb-to-ovn/>