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[Slawek Kaplonski <2024581@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Problem like that was mentioned in Vancouvers's "Challenges & lessons from operating OpenStack at Scale" forum session (https://etherpad.opendev.org/p/challenges-largescale)
In some cases, neutron metadata agent may put a lot of load on the RPC bus and neutron server as every time VM is asking for some of the metadata, this agent needs to find out what the id of the instance is. Because of that it sends RPC message to get port details every time.
It could be potentially avoided by some simple caching of the instance id in the agent's side.

** Affects: neutron
     Importance: Wishlist
         Status: New


** Tags: loadimpact rfe

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https://bugs.launchpad.net/bugs/2024581

Title:
  [RFE] Caching instance id in the metadata agent to have less RPC
  messages sent to server

Status in neutron:
  New

Bug description:
  Problem like that was mentioned in Vancouvers's "Challenges & lessons from operating OpenStack at Scale" forum session (https://etherpad.opendev.org/p/challenges-largescale)
  In some cases, neutron metadata agent may put a lot of load on the RPC bus and neutron server as every time VM is asking for some of the metadata, this agent needs to find out what the id of the instance is. Because of that it sends RPC message to get port details every time.
  It could be potentially avoided by some simple caching of the instance id in the agent's side.

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