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Hi,

On czwartek, 21 października 2021 11:37:09 CEST Arnaud Morin wrote:
> Thanks slawek,
> 
> Actually, we dig a little bit into code:
> https://review.opendev.org/c/openstack/neutron/+/64553
> 
> In patchet 59, a discussion between Carl and Assaf seems to be the
> decision of having 3:
> - "An additional standby could help certain topologies though I'm sure."
> - "Fair enough"

WOW, You dig deep to find that :) Thx a lot.

> 
> Cheers,
> 
> On 21.10.21 - 08:49, Slawek Kaplonski wrote:
> > Hi,
> > 
> > On Thu, Oct 21, 2021 at 07:34:43AM +0200, Arnaud wrote:
> > > Sorry, forgot to add neutron header
> > > 
> > > Kind regards,
> > > Arnaud
> > > 
> > > Le 20 octobre 2021 17:28:39 GMT+02:00, Arnaud Morin 
<arnaud.morin at gmail.com> a écrit :
> > > >Hey team,
> > > >
> > > >When using DVR + HA, we endup with all routers beeing deployed on the
> > > >computes (the DVR part) and 3 routers on dvr_snat nodes (for HA).
> > > >
> > > >The question is why 3 for snats?
> > > >I know that this is the max_l3_agents_per_router config parameter, but
> > > >2 seems enough?
> > > >
> > > >On the other side, DHCP agent default (dhcp_agents_per_network) is 1,
> > > >while this is also a precious service provided in the tenant network.
> > > >
> > > >So, is there any downside on having only 2 agents for routers?
> > 
> > TBH I don't think there is any downside to have only 2 agents hosting each
> > router (SNAT in case of DVR). Actually this is what we are e.g. testing in
> > the neutron-ovs-tempest-dvr-ha-multinode-full job as we have only 2 nodes
> > there.> 
> > > >Thanks in advance,
> > > >
> > > >Arnaud.


-- 
Slawek Kaplonski
Principal Software Engineer
Red Hat
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