searxng/docs/dev/engines/offline/nosql-engines.rst
HLFH 36538e6a20 [mod] migrate from Redis to Valkey
This patch migrates from `redis==5.2.1` [1] to `valkey==6.1.0` [2].

The migration to valkey is necessary because the company behind Redis has decided
to abandon the open source license. After experiencing a drop in user numbers,
they now want to run it under a dual license again. But this move demonstrates
once again how unreliable the company is and how it treats open source
developers.

To review first, read the docs::

    $ make docs.live

Follow the instructions to remove redis:

- http://0.0.0.0:8000/admin/settings/settings_redis.html

Config and install a local valkey DB:

- http://0.0.0.0:8000/admin/settings/settings_valkey.html

[1] https://pypi.org/project/redis/
[2] https://pypi.org/project/valkey/

Co-authored-by: Markus Heiser <markus.heiser@darmarit.de>
2025-07-08 13:10:13 +02:00

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.. _nosql engines:
===============
NoSQL databases
===============
.. sidebar:: further read
- `NoSQL databases <https://en.wikipedia.org/wiki/NoSQL>`_
- `valkey.io <https://valkey.io/>`_
- `MongoDB <https://www.mongodb.com>`_
.. contents::
:depth: 2
:local:
:backlinks: entry
.. sidebar:: info
Initial sponsored by `Search and Discovery Fund
<https://nlnet.nl/discovery>`_ of `NLnet Foundation <https://nlnet.nl/>`_.
The following `NoSQL databases`_ are supported:
- :ref:`engine valkey_server`
- :ref:`engine mongodb`
All of the engines above are just commented out in the :origin:`settings.yml
<searx/settings.yml>`, as you have to set various options and install
dependencies before using them.
By default, the engines use the ``key-value`` template for displaying results /
see :origin:`simple <searx/templates/simple/result_templates/key-value.html>`
theme. If you are not satisfied with the original result layout, you can use
your own template, set ``result_template`` attribute to ``{template_name}`` and
place the templates at::
searx/templates/{theme_name}/result_templates/{template_name}
Furthermore, if you do not wish to expose these engines on a public instance, you
can still add them and limit the access by setting ``tokens`` as described in
section :ref:`private engines`.
Extra Dependencies
==================
For using :ref:`engine valkey_server` or :ref:`engine mongodb` you need to
install additional packages in Python's Virtual Environment of your SearXNG
instance. To switch into the environment (:ref:`searxng-src`) you can use
:ref:`searxng.sh`::
$ sudo utils/searxng.sh instance cmd bash
(searxng-pyenv)$ pip install ...
Configure the engines
=====================
`NoSQL databases`_ are used for storing arbitrary data without first defining
their structure.
.. _engine valkey_server:
Valkey Server
-------------
.. _valkey: https://github.com/andymccurdy/valkey-py#installation
.. sidebar:: info
- ``pip install`` valkey_
- valkey.io_
- :origin:`valkey_server.py <searx/engines/valkey_server.py>`
.. automodule:: searx.engines.valkey_server
:members:
.. _engine mongodb:
MongoDB
-------
.. _pymongo: https://github.com/mongodb/mongo-python-driver#installation
.. sidebar:: info
- ``pip install`` pymongo_
- MongoDB_
- :origin:`mongodb.py <searx/engines/mongodb.py>`
.. automodule:: searx.engines.mongodb
:members: