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[doc] docker: revision and preparation of the documentation
- add sidebars with addition infos about commands and docker in general - fix long lines & indentation - correct link to https://github.com/searxng/searxng-docker Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
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Markus Heiser
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.. _installation docker:
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===================
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Docker installation
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===================
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.. contents:: Contents
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:depth: 2
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:local:
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:backlinks: entry
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.. _ENTRYPOINT: https://docs.docker.com/engine/reference/builder/#entrypoint
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.. _searxng-docker: https://github.com/searxng/searxng-docker
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.. _[filtron]: https://hub.docker.com/r/dalf/filtron
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.. _[morty]: https://hub.docker.com/r/dalf/morty
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.. _[caddy]: https://hub.docker.com/_/caddy
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----
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.. sidebar:: info
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Docker image searxng/searxng
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============================
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- :origin:`Dockerfile`
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- `searxng/searxng @dockerhub <https://hub.docker.com/r/searxng/searxng>`_
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- `Docker overview <https://docs.docker.com/get-started/overview>`_
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- `Docker Cheat Sheet <https://www.docker.com/sites/default/files/d8/2019-09/docker-cheat-sheet.pdf>`_
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- `Alpine Linux <https://alpinelinux.org>`_ `(wiki) <https://en.wikipedia.org/wiki/Alpine_Linux>`__ `apt packages <https://pkgs.alpinelinux.org/packages>`_
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- Alpine's ``/bin/sh`` is :man:`dash`
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.. tip::
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The docker image is `searxng/searxng <https://hub.docker.com/r/searxng/searxng>`_ (based on `github.com/searxng/searxng <https://github.com/searxng/searxng>`_).
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If you intend to create a public instance using Docker, use our well
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maintained searxng-docker_ image which includes
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Make sure you have `installed Docker <https://docs.docker.com/get-docker/>`_. For instance, you can deploy a local instance:
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- :ref:`protection <searx filtron>` `[filtron]`_,
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- a :ref:`result proxy <searx morty>` `[morty]`_ and
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- a HTTPS reverse proxy `[caddy]`_.
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Make sure you have `installed Docker <https://docs.docker.com/get-docker/>`_ and
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on Linux, don't forget to add your user to the docker group (log out and log
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back in so that your group membership is re-evaluated):
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.. code:: sh
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export PORT=80
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docker pull searxng/searxng
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docker run --rm -d -v ${PWD}/searx:/etc/searx -p $PORT:8080 -e BASE_URL=http://localhost:$PORT/ searxng/searxng
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$ sudo usermod -a -G docker $USER
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Go to ``http://localhost:$PORT``.
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Inside ``${PWD}/searx``, you will find ``settings.yml`` and ``uwsgi.ini``.
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You can modify these files according to your needs and restart the Docker image.
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searxng/searxng
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===============
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.. sidebar:: ``docker run``
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- `-\-rm <https://docs.docker.com/engine/reference/run/#clean-up---rm>`__
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automatically clean up when container exits
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- `-d <https://docs.docker.com/engine/reference/run/#detached--d>`__ start
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detached container
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- `-v <https://docs.docker.com/engine/reference/run/#volume-shared-filesystems>`__
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mount volume ``HOST:CONTAINER``
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The docker image is based on :origin:`Dockerfile` and available from
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`searxng/searxng @dockerhub`_. Using the docker image is quite easy, for
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instance you can pull the `searxng/searxng @dockerhub`_ image and deploy a local
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instance using `docker run <https://docs.docker.com/engine/reference/run/>`_:
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.. code:: sh
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$ 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}/searx:/etc/searx" \
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-e "BASE_URL=http://localhost:$PORT/" \
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-e "INSTANCE_NAME=my-instance" \
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searxng/searxng
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2f998.... # container's ID
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Open your WEB browser and visit the URL:
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.. code:: sh
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$ xdg-open "http://localhost:$PORT"
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Inside ``${PWD}/searx``, 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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stoped. 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 conatiners & 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 searx
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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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============
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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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Build the image
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---------------
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It's also possible to build SearXNG from the embedded Dockerfile.
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.. code:: sh
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git clone https://github.com/searxng/searxng.git
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cd searx
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make docker.build
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Public instance
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===============
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If you intend to create a public instance using Docker, see https://github.com/searx/searx-docker
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