** Changed in: neutron
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1580239
Title:
[RFE] Add agent extension framework for L3 agent
Status in neutron:
Fix Released
Bug description:
Neutron advanced services (*aaS) projects need a standardized method
to gain access to resources internal to the L3 agent. Previously, the
proper methodology was using inheritance from L3NATAgent and it's
subclasses. But now it is necessary to decouple these things, so that
each *aaS can be a separate extension that registers with the L3
agent, can interrogate the L3 agent for necessary information, and
receives notifications of events through callbacks.
Some examples of what this would enable FWaaS and other advanced
services to do are:
- The ability to map router_id to router info so we can program iptables to
the correct namespace.
- The ability to load the Service Agent - so we have an RPC endpoint in the
context of L3Agent.
FWaaS can then use the existing observer hierarchy pattern to listen
for notifications. This would prevent the need to patch the agent
code for advanced services to function.
Note: This must be executed in such a way that multiple *aaS services
can plug in simultaneously without interfering with each other.
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