[openstack-dev] [oslo][devstack][all] ZooKeeper vs etcd for Tooz/DLM

Jay Pipes jaypipes at gmail.com
Sun Mar 19 13:32:36 UTC 2017

On 03/18/2017 07:48 PM, Mike Perez wrote:
> On 12:35 Mar 14, Jay Pipes wrote:
>> On 03/14/2017 08:57 AM, Julien Danjou wrote:
>>> On Tue, Mar 14 2017, Davanum Srinivas wrote:
>>>> Let's do it!! (etcd v2-v3 in tooz)
>>> Hehe. I'll move that higher in my priority list, I swear. But anyone is
>>> free to beat me to it in the meantime. ;)
>> A weekend experiment:
>> https://github.com/jaypipes/os-lively
>> Not tooz, because I'm not interested in a DLM nor leader election library
>> (that's what the underlying etcd3 cluster handles for me), only a fast
>> service liveness/healthcheck system, but it shows usage of etcd3 and Google
>> Protocol Buffers implementing a simple API for liveness checking and host
>> maintenance reporting.
>> My plan is to push some proof-of-concept patches that replace Nova's
>> servicegroup API with os-lively and eliminate Nova's use of an RDBMS for
>> service liveness checking, which should dramatically reduce the amount of
>> both DB traffic as well as conductor/MQ service update traffic.
> As Monty has mentioned, I'd love for us to decide on one thing. As being
> a moderator of that discussion I was trying not to be one-sided.
> Whether or not a decision was made 1.5 years ago, the community that was
> present at that time of the decision at the summit decided on an abstraction
> layer to have options. Forcing an option on the community without gathering
> feedback of what the community currently looks like is not a good idea.
> I'd recommend if you want to make this base service, start the discussions in
> somewhere other than the dev list, like the Forum.

Mike, it was an experiment :)

But, yes, happy to participate in a discussion at the forum.


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