** Changed in: neutron
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1667877
Title:
[RFE] Allow DVR for E/W while leaving N/S centralized
Status in neutron:
Fix Released
Bug description:
Use Case
========
OpenStack is deployed in an L3 fabric so the external network cannot be
extended to all compute nodes. Even though this means SNAT and floating IP
traffic (North/South) will be run through a network node with external network
access, the operator still wants the east/west routing offload offered by DVR.
So even though the topology does not allow for the N/S DVR direct
routing, we want to have a way to still take advantage of the E/W
direct routing.
Potential Solution
==================
Provide a Configurable option to configure Floatingips for DVR based routers
to reside on Compute Node or on Network Node.
Also proactively check the status of the agent on the destination node and if
the agent health is down, then configure the Floatingip on the Network Node.
Provide a configuration Option in neutron.conf such as
DVR_FLOATINGIP_CENTRALIZED = 'enforced/circumstantial'
If DVR_FLOATINGIP_CENTRALIZED is configured as 'enforced' all floatingip will
be configured on the Network NOde.
If the DVR_FLOATINGIP_CENTRALIZED is configured as 'circumstantial' based on
the agent health the floatingip will be configured either in the compute node
or on the Network Node.
If this option is not configured, the Floatingip will be distributed
for all bound ports and for just the unbound ports the floatingip will
be implemented in the Network Node.
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