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At  least in our case, Pulsar was developed in house here at Yahoo
originally and we have very large deployments and many experts (most
original major contributors) available directly. So, I’m a little biased. :D

On Tue, Feb 15, 2022 at 21:31 Sean Mooney <smooney at redhat.com> wrote:

> On Mon, 2022-02-14 at 10:32 -0600, Ben Nemec wrote:
> > First off I will note that we've had very bad luck in the past with
> > non-rabbit drivers getting traction either with developers or operators.
> > Most of them have bit-rotted and been removed at this point.
> >
> > That said, we do have a list of requirements for oslo.messaging drivers
> > in the documentation:
> >
> https://docs.openstack.org/oslo.messaging/latest/contributor/supported-messaging-drivers.html
> >
> > We realize those are non-trivial to achieve for a new driver, so in
> > discussions about other drivers we've pursued the option of developing
> > the new driver out of tree as either a third-party library or a feature
> > branch in oslo.messaging. For NATS[0] we ended up going with a feature
> > branch, although to my knowledge that hasn't really gone anywhere (see
> > above about having bad luck with this sort of thing).
> >
> > The other unfortunate reality is that we've lost the messaging experts
> > who would ideally have reviewed a new driver. Working in a feature
> > branch that doesn't affect the released library mitigates this somewhat
> > because issues can be worked out without affecting production
> > deployments, but unfortunately it is an obstacle.
> >
> > That said, if someone were to develop a new driver that would probably
> > go a long way toward making them a messaging expert so this might be a
> > good way to replenish our talent pool in this area. :-)
> >
> > I don't want to discourage anyone from writing a new driver (I think
> > everyone would love to get rid of rabbit), but before starting down that
> > path I think it's important to understand that there is a lot of inertia
> > behind rabbit and messaging is a complex topic. This is not a project
> > that will take a few weeks. Even a few months is a stretch. You're going
> > to need a rock solid driver implementation and then be able to show that
> > it's enough better than rabbit to convince people to switch.
> >
> > So, if after all this doom and gloom you still want to move forward,
> > feel free to write up a spec similar to the NATS one and we can get you
> > a feature branch or repo to work in.
> >
> > 0: https://review.opendev.org/c/openstack/oslo-specs/+/692784
> speaking of the NATS on is that actully moving forward.
> i had high hopes that NATS could be a scalable cloud native replecement
> for rabit
> im not familar with Apache Pulsar https://pulsar.apache.org/ perhaps it
> has a similar feature set to NATS https://nats.io/.
> lookign at it however Apache Pulsar seams to be written in java. not to be
> language
> snob but that might prove to be a barrier for deployment. that was an
> issue for monasca
> in the past. addign another language runtime to the requirement to you
> cluster like
> erlang is added by rabbit and java would be added by pulsar to me is a
> dissadvantage
> as it increase the treath domain form a secuirty perspecitve.
> https://github.com/apache/pulsar
>
> NATS being written in go and therefor deployed a a single staticly linked
> binsary with no
> runtime deps is one of the advantages it brings
> https://github.com/nats-io/nats-server
>
> is apache/pulsar somthign that you specificly have exprenice with or
> wanted to use or just the first
> non rabit solution that seamed to fit the requireemtns that you came
> across.
> if so i think it would be worth your time asseing NATS too and perhaps
> collaberate with teh previous effort
> or take it over if you find it equally suitable.
> >
> > On 2/13/22 20:54, liyang wrote:
> > > Hi  everyone,
> > >      I find Apache Pulsar is very popular in MQ area, especially in
> > > clound native area. Is there any body integrate this MQ to
> oslo.messaging?
> > >      Said to the truth. RabbitMQ developed in Erlang has very little
> > > source code level material, Qpid has very little operation practice in
> > > the internet. Kafka only support notification in oslo.messaging.
> > >      I think the Apache Pulsar  is clound native based. It may
> enforece
> > > the big scale in extension about Openstack deployment.
> > >
> > >
> >
>
>
> --
Thanks,
    --Adam
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