Folks,
A follow-up to Steve's earlier email.
Elasticsearch recommends that the version's major numbers match between
Elasticsearch and the Elasticsearch python client [1]. To accomodate this, we
have submitted a requirement patch to update the Elasticsearch client to 2.3.X.
If this is a concern, please comment on the patch:
https://review.openstack.org/#/c/338425
[1] https://elasticsearch-py.readthedocs.io/en/master
> I'm looking into supporting and testing Elasticsearch 2.x in Searchlight's
> test jobs. Currently I don't know of any other projects that run tests
> against Elasticsearch in the gate (since we had to add it to Jenkins [1]).
> Several projects install the python elasticsearch client in requirements.txt,
> and it is currently capped to <2.0 in global-requirements [2], and others
> consume it directly through HTTP requests. Searchlight needs to move to
> support Elasticsearch 2.x in Newton but we are aware that doing so will
> affect other projects.
>
> Elasticsearch 2.x is backwards incompatible [3] with 1.x in some ways. The
> python client library is similarly backwards-incompatible; it is strongly
> recommended the client major version matches the server major version. In
> testing Searchlight we found only a couple of fairly minor changes were
> needed (and the 1.x client library seems to continue to work against a 2.x
> server) , but YMMV. Devstack's default ES version is 1.4.2 [4] (which should
> be changed to 1.7 in any case) and we obviously cannot change that until all
> projects support 2.x.
>
> A wholesale change to move to Elasticsearch 2.x would require changing
> global-requirements, but this may obviously break projects not ready for the
> change. My questions for the projects affected are:
>
> * Have you tested with ES 2.x at all?
> * Do you have plans to move to ES 2.x?
>
> Our likely fallback is testing with the 1.x client until we can move devstack
> and global-requirements to 2.x; if we discover issues in the meantime we will
> include a deployer note that the python library needs to be updated if
> Elasticsearch 2.x is in use.
>
> Thanks,
>
> Steve
--
Rick Aulino
HPCS R&D
rick.aul...@hpe.com
Hewlett Packard Enterprise 970-898-0575
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