openstack/neutron
Code Issues Proposed changes

[OVN] Set the default OVN metadata worker number to 0

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If the configuration variable ``metadata_workers`` is not set,
the default value for ML2/OVN mechanism driver will be zero.
This value defines the number of separate workers that will
be spawned by the OVN metadata agent. By default, the OVN
metadata proxy handler will be executed inside the same OVN
metadata agent process, in a parallel thread. That reduces the
number of OVN SB database connections to one.

Related-Bug: #1993181
Change-Id: I8bc4f2784ccefe6078506bc27cc7a98c48192ad2
(cherry picked from commit 70a2029ca1)
This commit is contained in:
Rodolfo Alonso Hernandez 2022-10-05 21:35:48 +02:00 committed by Rodolfo Alonso
parent fb7ee82808
commit 8dd2dea65d
2 changed files with 10 additions and 2 deletions
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3
neutron/agent/ovn/metadata/server.py
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@ -223,8 +223,7 @@ class UnixDomainMetadataProxy(object):
'neutron-ovn-metadata-agent') 'neutron-ovn-metadata-agent')
# Set the default metadata_workers if not yet set in the config file # Set the default metadata_workers if not yet set in the config file
md_workers = self.conf.metadata_workers md_workers = self.conf.metadata_workers
if md_workers is None: md_workers = 0 if md_workers is None else md_workers
md_workers = 2
sb_idl = self.sb_idl if md_workers == 0 else None sb_idl = self.sb_idl if md_workers == 0 else None
self.server.start(MetadataProxyHandler(self.conf, self.chassis, self.server.start(MetadataProxyHandler(self.conf, self.chassis,
sb_idl), sb_idl),

9
releasenotes/notes/ovn-metadata-workers-fa8a2019f34bd572.yaml Normal file
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@ -0,0 +1,9 @@
---
upgrade:
- |
The default value for the ``metadata_workers`` configuration option
has changed to 0 for the ML2/OVN driver. Since `[OVN] Allow to execute
"MetadataProxyHandler" in a local thread <https://review.opendev.org/c/openstack/neutron/+/861649>`_,
the OVN metadata proxy handler can be spawned in the same process of
the OVN metadata agent, in a local thread. That reduces the number of
OVN SB database connections to one.