Open Stack

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.aulino at hpe.com
Hewlett Packard Enterprise                                         970-898-0575

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