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[Maciej Jozefczyk <1871355@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

The OVN Octavia provider driver in OvnProviderHelper caches attributes
[1]:

ovn_nbdb_api_for_events = None
ovn_nb_idl_for_events = None
ovn_nbdb_api = None


to not re-create each time OVN IDL that is used for handling events.

Now we are able to use Octavia Driver Agent [2] instead to not have
those long-living IDLs in API process.

TODO:
- create driver agent and register its entry point
- While setting up the driver agent instance start IDL that will handle events:
https://opendev.org/openstack/ovn-octavia-provider/src/branch/master/ovn_octavia_provider/driver.py#L279
- stop caching ovn_nbdb_api, ovn_nb_idl_for_events and ovn_nbdb_api_for_events in the OvnProviderHelper.


[1] https://opendev.org/openstack/ovn-octavia-provider/src/branch/master/ovn_octavia_provider/driver.py#L273
[2] https://docs.openstack.org/octavia/latest/contributor/guides/providers.html#provider-agent-method-invocation

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: ovn-octavia-provider

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https://bugs.launchpad.net/bugs/1871355

Title:
  OVN octavia provider driver should spawn long-living process in driver
  agent

Status in neutron:
  New

Bug description:
  The OVN Octavia provider driver in OvnProviderHelper caches attributes
  [1]:

  ovn_nbdb_api_for_events = None
  ovn_nb_idl_for_events = None
  ovn_nbdb_api = None

  
  to not re-create each time OVN IDL that is used for handling events.

  Now we are able to use Octavia Driver Agent [2] instead to not have
  those long-living IDLs in API process.

  TODO:
  - create driver agent and register its entry point
  - While setting up the driver agent instance start IDL that will handle events:
  https://opendev.org/openstack/ovn-octavia-provider/src/branch/master/ovn_octavia_provider/driver.py#L279
  - stop caching ovn_nbdb_api, ovn_nb_idl_for_events and ovn_nbdb_api_for_events in the OvnProviderHelper.

  
  [1] https://opendev.org/openstack/ovn-octavia-provider/src/branch/master/ovn_octavia_provider/driver.py#L273
  [2] https://docs.openstack.org/octavia/latest/contributor/guides/providers.html#provider-agent-method-invocation

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