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---
features:
- |
The ``nova_libvirt`` container's ``libvirtd.conf`` now raises libvirt's
connection processing limits above their stock defaults, which are tuned
for a multi-tenant host rather than for Kolla's single-privileged-client
pattern. ``max_client_requests`` is raised from 5 to 20 and ``max_workers``
from 20 to 50. Both are exposed as the ``libvirt_max_client_requests`` and
``libvirt_max_workers`` variables so they can be tuned further.
fixes:
- |
Fixed intermittent instance build failures (``Cannot recv data:
Input/output error`` during ``defineXML``, leading to instances in
``ERROR`` state) that occurred when several instances were built
concurrently. nova-compute is effectively the sole client of ``libvirtd``,
and libvirt's default per-client request cap of 5 was being exceeded by
concurrent builds plus periodic tasks, starving keepalive responses until
``libvirtd`` dropped the connection.
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