[Koha-bugs] [Bug 25439] [Omnibus] Prepare Koha to ElasticSearch 7 - ES7

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=25439

--- Comment #15 from Victor Grousset/tuxayo <victor at tuxayo.net> ---
Hi :)

There is enough real world usage to claim that Koha (down to 21.05.x) supports
ES 7
- Lund University since at least 2022-02
- LMS Cloud on 150 Koha instance since 2022-06, just learned this at the
hackfest.

OpenSearch 1.x passes also the tests and is a drop in replacement of ES 7.x so
we can be confident enough to advertise support for it also.

So unless someone thinks of a problem I'll update the system requirements
wikipage with that.

---

Finally finished the discussion with Mason about how what to say about all this
and ES 6 being EOL and the ES license change and OpenSearch fork.

Is that ok if in the wikipage we provide support and license info for each Koha
version like this:
- ES 6.x: supported, but EOL since 10 Feb 2022 so no more update even in case
of security issues
- ES 7.x: supported, some phrase to tell that it's not really libre/open source
anymore (SSPL license) and it's complicated blablabla
- OS 1.x: supported, drop in replacement for ElasticSearch, still unambiguously
libre/open source (Apache License 2.0)

For those unsure what to pick, recommend OpenSearch 1.x so we don't push people
towards a not really libre dependency.

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