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Merge "Upgrade note for concurrency mode default change"

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Zuul
2026-01-14 21:23:21 +00:00
committed by Gerrit Code Review
parent d16689b775 f73a23b4d4
commit 80753c5745
2 changed files with 31 additions and 3 deletions
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releasenotes/notes/threading-by-default-sch-api-meta-d2534ce9c7b69d8a.yaml
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@@ -3,7 +3,20 @@ features:
- |
The default concurrency mode is now switched from eventlet to native
threading for nova-scheduler, nova-api, and nova-metadata services.
The concurrency mode can still be switched back to eventlet if needed.
Please read the
The concurrency mode can still be switched back to eventlet if needed
per service. Please read the
`concurrency <https://docs.openstack.org/nova/latest/admin/concurrency.html>`__
guide for more details.
upgrade:
- |
When you are upgrading to 2026.1 (Gazpacho) or newer the default
configuration of nova-scheduler, nova-api, and nova-metadata services
change to run these services with native threading mode by default
instead of the legacy eventlet mode. We recommend to decouple the
upgrade from the concurrency mode change to reduce the risk of issues.
To do that either test the native threading mode of these services already
in 2025.2 (Flamingo) or ensure that your service configuration is
explicitly using the eventlet mode before you upgrade and only change to
threading mode after the upgrade was successful. Please read the
`concurrency <https://docs.openstack.org/nova/latest/admin/concurrency.html>`__
guide for more details on how to configure the mode.