Open Stack

Armando M. wrote:
> My understanding of the plan to overhaul the neutron (bloated) layer
> present in DevStack being tackled in [1] has always been that this was
> about trimming the layer rather than eliminating it altogether. Is this
> email a reflection of a desire to change direction? If so, SeanC please
> clarify because I am slightly confused.

As part of the DevStack refactor, I am trying to shrink the amount of
DevStack configuration variables that are carried around for Neutron.
That is the part I am trying to eliminate. There must be support for
Neutron in DevStack, if we ever wish to become the default networking
project in OpenStack and successfully deprecate nova-network.

> To the very minimum we'd need to find the right blend of config variables
> which (in conjunction with some other *optional* local.conf extra juice)
> produce the Neutron configuration files that we have in the gate, namely
> OVS, LB and OVS+DVR, with their multi-node variants, and thus allow us to
> get happy pass with Grenade/Tempest (if that means skipping some tests so
> be it) across all the branches we currently gate against. The rest of the
> layer can be stripped to the bare bone, but without it we're basically
> gonna have to deal with long local.conf files with entire chunks of agent
> files etc. thus making Neutron support for repos like devstack-gate and
> project-config rather more painful (I am assuming we're gonna have to use
> the new layer/approach at some point?). Bear in mind that the complexity
> bubble needs to move/split, it's not just gonna burst and vanish :)

It is my hope that we can start looking at some of these configurations,
take a look at what puppet or ansible set, and realize that a lot of
these options could just be defaults instead of making it the job of
deployment tools to explicitly configure.

> On another note, we'd have to keep in mind neutron_plugins that currently
> have a place in the devstack tree and/or that rely on the existing
> neutron_legacy bits. What's the plan for those (e.g. networking-[ovn, odl,
> ...] et al)? Finally, what's the plan for switching in the gate?

I think neutron_plugins will eventually be removed. Third party plugins
like ovn, odl, et al most likely have DevStack plugins that supersede
the code in neutron_plugins.

For the OVS and LB agents, I think we need to clean them up, and again,
see what can be configured by default.

-- 
Sean M. Collins