Public bug reported:
Summary
-------
When doing the init for new router ports, some of the steps are not needed and
just add extra overhead.
Description
-----------
These unnecessary steps slow down the router setup. If the entire network is
being setup from scratch, this can increase the time it takes for VMs to become
reachable.
Pre-conditions
--------------
The Neutron L3 agent is attempting to setup a router for the first time or from
scratch (e.g. following a complete removal of the qrouter & fip namespaces).
For replication purposes, this should be a router with a large number of
subnets attached (~100).
Step by step reproduction steps
-------------------------------
On a compute node with DVR:
ip netns delete $QROUTER_NETNS && ip netns delete $FIP_NETNS && docker
restart neutron_l3_agent
Note: How the agent is restarted will of course depend on how OpenStack
is being deployed.
Expected output
---------------
Unnecessary steps for new interfaces are skipped.
Actual output
-------------
Unnecessary steps for new interfaces are carried out but result in no changes
and delay the router setup being completed.
Version
-------
OpenStack Antelope
** Affects: neutron
Importance: Undecided
Assignee: Adam Oswick (adamoswick)
Status: In Progress
** Changed in: neutron
Assignee: (unassigned) => Adam Oswick (adamoswick)
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https://bugs.launchpad.net/bugs/2043558
Title:
Some init_router_port steps are unnecessary for new devices
Status in neutron:
In Progress
Bug description:
Summary
-------
When doing the init for new router ports, some of the steps are not needed
and just add extra overhead.
Description
-----------
These unnecessary steps slow down the router setup. If the entire network is
being setup from scratch, this can increase the time it takes for VMs to become
reachable.
Pre-conditions
--------------
The Neutron L3 agent is attempting to setup a router for the first time or
from scratch (e.g. following a complete removal of the qrouter & fip
namespaces). For replication purposes, this should be a router with a large
number of subnets attached (~100).
Step by step reproduction steps
-------------------------------
On a compute node with DVR:
ip netns delete $QROUTER_NETNS && ip netns delete $FIP_NETNS && docker
restart neutron_l3_agent
Note: How the agent is restarted will of course depend on how
OpenStack is being deployed.
Expected output
---------------
Unnecessary steps for new interfaces are skipped.
Actual output
-------------
Unnecessary steps for new interfaces are carried out but result in no changes
and delay the router setup being completed.
Version
-------
OpenStack Antelope
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