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* Docker: add UWSGI_WORKERS and UWSGI_THREAD. UWSGI_WORKERS specifies the number of process. UWSGI_THREADS specifies the number of threads. The Docker convention is to specify the whole configuration through environment variables. While not done in SearXNG, these two additional variables allows admins to skip uwsgi.ini In additional, https://github.com/searxng/preview-environments starts Docker without additional files through searxng-helm-chat. Each instance consumes 1Go of RAM which is a lot especially when there are a lot of instances / pull requests. * [scripts] add environments UWSGI_WORKERS and UWSGI_THREADS - UWSGI_WORKERS specifies the number of process. - UWSGI_THREADS specifies the number of threads. Templates for uwsgi scripts can be tested by:: UWSGI_WORKERS=8 UWSGI_THREADS=9 \ ./utils/searxng.sh --cmd\ eval "echo \"$(cat utils/templates/etc/uwsgi/*/searxng.ini*)\""\ | grep "workers\|threads" Signed-off-by: Markus Heiser <markus.heiser@darmarit.de> --------- Signed-off-by: Markus Heiser <markus.heiser@darmarit.de> Co-authored-by: Markus Heiser <markus.heiser@darmarit.de>
198 lines
6.2 KiB
ReStructuredText
198 lines
6.2 KiB
ReStructuredText
.. _installation docker:
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================
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Docker Container
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================
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.. _ENTRYPOINT: https://docs.docker.com/engine/reference/builder/#entrypoint
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.. _searxng/searxng @dockerhub: https://hub.docker.com/r/searxng/searxng
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.. _searxng-docker: https://github.com/searxng/searxng-docker
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.. _[caddy]: https://hub.docker.com/_/caddy
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.. _Redis: https://redis.io/
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----
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.. sidebar:: info
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- `searxng/searxng @dockerhub`_
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- :origin:`Dockerfile`
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- `Docker overview <https://docs.docker.com/get-started/overview>`_
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- `Docker Cheat Sheet <https://docs.docker.com/get-started/docker_cheatsheet.pdf>`_
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- `Alpine Linux <https://alpinelinux.org>`_
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`(wiki) <https://en.wikipedia.org/wiki/Alpine_Linux>`__
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`apt packages <https://pkgs.alpinelinux.org/packages>`_
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- Alpine's ``/bin/sh`` is :man:`dash`
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**If you intend to create a public instance using Docker, use our well maintained
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docker container**
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- `searxng/searxng @dockerhub`_.
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.. sidebar:: hint
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The rest of this article is of interest only to those who want to create and
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maintain their own Docker images.
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The sources are hosted at searxng-docker_ and the container includes:
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- a HTTPS reverse proxy `[caddy]`_ and
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- a Redis_ DB
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The `default SearXNG setup <https://github.com/searxng/searxng-docker/blob/master/searxng/settings.yml>`_
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of this container:
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- enables :ref:`limiter <limiter>` to protect against bots
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- enables :ref:`image proxy <image_proxy>` for better privacy
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- enables :ref:`cache busting <static_use_hash>` to save bandwidth
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----
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Get Docker
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==========
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If you plan to build and maintain a docker image by yourself, make sure you have
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`Docker installed <https://docs.docker.com/get-docker/>`_. On Linux don't
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forget to add your user to the docker group (log out and log back in so that
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your group membership is re-evaluated):
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.. code:: sh
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$ sudo usermod -a -G docker $USER
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searxng/searxng
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===============
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.. sidebar:: ``docker run``
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- `-\-rm <https://docs.docker.com/engine/reference/run/#clean-up---rm>`__
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automatically clean up when container exits
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- `-d <https://docs.docker.com/engine/reference/run/#detached--d>`__ start
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detached container
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- `-v <https://docs.docker.com/engine/reference/run/#volume-shared-filesystems>`__
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mount volume ``HOST:CONTAINER``
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The docker image is based on :origin:`Dockerfile` and available from
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`searxng/searxng @dockerhub`_. Using the docker image is quite easy, for
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instance you can pull the `searxng/searxng @dockerhub`_ image and deploy a local
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instance using `docker run <https://docs.docker.com/engine/reference/run/>`_:
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.. code:: sh
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$ mkdir my-instance
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$ cd my-instance
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$ export PORT=8080
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$ docker pull searxng/searxng
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$ docker run --rm \
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-d -p ${PORT}:8080 \
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-v "${PWD}/searxng:/etc/searxng" \
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-e "BASE_URL=http://localhost:$PORT/" \
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-e "INSTANCE_NAME=my-instance" \
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searxng/searxng
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2f998.... # container's ID
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The environment variables UWSGI_WORKERS and UWSGI_THREADS overwrite the default
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number of UWSGI processes and UWSGI threads specified in `/etc/searxng/uwsgi.ini`.
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Open your WEB browser and visit the URL:
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.. code:: sh
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$ xdg-open "http://localhost:$PORT"
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Inside ``${PWD}/searxng``, you will find ``settings.yml`` and ``uwsgi.ini``. You
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can modify these files according to your needs and restart the Docker image.
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.. code:: sh
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$ docker container restart 2f998
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Use command ``container ls`` to list running containers, add flag `-a
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<https://docs.docker.com/engine/reference/commandline/container_ls>`__ to list
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exited containers also. With ``container stop`` a running container can be
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stopped. To get rid of a container use ``container rm``:
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.. code:: sh
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$ docker container ls
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CONTAINER ID IMAGE COMMAND CREATED ...
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2f998d725993 searxng/searxng "/sbin/tini -- /usr/…" 7 minutes ago ...
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$ docker container stop 2f998
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$ docker container rm 2f998
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.. sidebar:: Warning
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This might remove all docker items, not only those from SearXNG.
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If you won't use docker anymore and want to get rid of all containers & images
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use the following *prune* command:
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.. code:: sh
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$ docker stop $(docker ps -aq) # stop all containers
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$ docker system prune # make some housekeeping
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$ docker rmi -f $(docker images -q) # drop all images
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shell inside container
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----------------------
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.. sidebar:: Bashism
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- `A tale of two shells: bash or dash <https://lwn.net/Articles/343924/>`_
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- `How to make bash scripts work in dash <http://mywiki.wooledge.org/Bashism>`_
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- `Checking for Bashisms <https://dev.to/bowmanjd/writing-bash-scripts-that-are-not-only-bash-checking-for-bashisms-and-testing-with-dash-1bli>`_
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Like in many other distributions, Alpine's `/bin/sh
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<https://wiki.ubuntu.com/DashAsBinSh>`__ is :man:`dash`. Dash is meant to be
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`POSIX-compliant <https://pubs.opengroup.org/onlinepubs/9699919799>`__.
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Compared to debian, in the Alpine image :man:`bash` is not installed. The
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:origin:`dockerfiles/docker-entrypoint.sh` script is checked *against dash*
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(``make tests.shell``).
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To open a shell inside the container:
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.. code:: sh
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$ docker exec -it 2f998 sh
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Build the image
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===============
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It's also possible to build SearXNG from the embedded :origin:`Dockerfile`::
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$ git clone https://github.com/searxng/searxng.git
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$ cd searxng
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$ make docker.build
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...
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Successfully built 49586c016434
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Successfully tagged searxng/searxng:latest
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Successfully tagged searxng/searxng:1.0.0-209-9c823800-dirty
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$ docker images
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REPOSITORY TAG IMAGE ID CREATED SIZE
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searxng/searxng 1.0.0-209-9c823800-dirty 49586c016434 13 minutes ago 308MB
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searxng/searxng latest 49586c016434 13 minutes ago 308MB
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alpine 3.13 6dbb9cc54074 3 weeks ago 5.61MB
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Command line
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============
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.. sidebar:: docker run
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Use flags ``-it`` for `interactive processes
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<https://docs.docker.com/engine/reference/run/#foreground>`__.
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In the :origin:`Dockerfile` the ENTRYPOINT_ is defined as
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:origin:`dockerfiles/docker-entrypoint.sh`
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.. code:: sh
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docker run --rm -it searxng/searxng -h
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.. program-output:: ../dockerfiles/docker-entrypoint.sh -h
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