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======
Apache
======
.. _Apache: https://httpd.apache.org/
.. _Apache Debian:
https://cwiki.apache.org/confluence/display/HTTPD/DistrosDefaultLayout#DistrosDefaultLayout-Debian,Ubuntu(Apachehttpd2.x):
.. _apache2.README.Debian:
https://salsa.debian.org/apache-team/apache2/raw/master/debian/apache2.README.Debian
.. _Apache Arch Linux:
https://wiki.archlinux.org/index.php/Apache_HTTP_Server
.. _Apache Fedora:
https://docs.fedoraproject.org/en-US/quick-docs/getting-started-with-apache-http-server/index.html
.. _Apache directives:
https://httpd.apache.org/docs/trunk/mod/directives.html
.. _Getting Started:
https://httpd.apache.org/docs/current/en/getting-started.html
.. _Terms Used to Describe Directives:
https://httpd.apache.org/docs/current/en/mod/directive-dict.html
.. _Configuration Files:
https://httpd.apache.org/docs/current/en/configuring.html
.. _ProxyPreserveHost: https://httpd.apache.org/docs/trunk/mod/mod_proxy.html#proxypreservehost
.. _LoadModule:
https://httpd.apache.org/docs/mod/mod_so.html#loadmodule
.. _IncludeOptional:
https://httpd.apache.org/docs/mod/core.html#includeoptional
.. _DocumentRoot:
https://httpd.apache.org/docs/trunk/mod/core.html#documentroot
.. _Location:
https://httpd.apache.org/docs/trunk/mod/core.html#location
.. _uWSGI Apache support:
https://uwsgi-docs.readthedocs.io/en/latest/Apache.html
.. _mod_proxy_uwsgi:
https://uwsgi-docs.readthedocs.io/en/latest/Apache.html#mod-proxy-uwsgi
.. _mod_proxy_http:
https://httpd.apache.org/docs/current/mod/mod_proxy_http.html
.. _mod_proxy:
https://httpd.apache.org/docs/current/mod/mod_proxy.html
This section explains how to set up a SearXNG instance using the HTTP server Apache_.
If you did use the :ref:`installation scripts` and do not have any special preferences
you can install the :ref:`SearXNG site <apache searxng site>` using
:ref:`searxng.sh <searxng.sh overview>`:
.. code:: bash
$ sudo -H ./utils/searxng.sh install apache
If you have special interests or problems with setting up Apache, the following
section might give you some guidance.
.. sidebar:: further read
- `Apache Arch Linux`_
- `Apache Debian`_
- `apache2.README.Debian`_
- `Apache Fedora`_
- `Apache directives`_
.. contents::
:depth: 2
:local:
:backlinks: entry
The Apache HTTP server
======================
If Apache_ is not installed, install it now. If apache_ is new to you, the
`Getting Started`_, `Configuration Files`_ and `Terms Used to Describe
Directives`_ documentation gives first orientation. There is also a list of
`Apache directives`_ *to keep in the pocket*.
.. tabs::
.. group-tab:: Ubuntu / debian
.. code:: bash
sudo -H apt-get install apache2
.. group-tab:: Arch Linux
.. code:: bash
sudo -H pacman -S apache
sudo -H systemctl enable httpd
sudo -H systemctl start http
.. group-tab:: Fedora / RHEL
.. code:: bash
sudo -H dnf install httpd
sudo -H systemctl enable httpd
sudo -H systemctl start httpd
Now at http://localhost you should see some kind of *Welcome* or *Test* page.
How this default site is configured, depends on the linux distribution
(compare `Apache directives`_).
.. tabs::
.. group-tab:: Ubuntu / debian
.. code:: bash
less /etc/apache2/sites-enabled/000-default.conf
In this file, there is a line setting the `DocumentRoot`_ directive:
.. code:: apache
DocumentRoot /var/www/html
And the *welcome* page is the HTML file at ``/var/www/html/index.html``.
.. group-tab:: Arch Linux
.. code:: bash
less /etc/httpd/conf/httpd.conf
In this file, there is a line setting the `DocumentRoot`_ directive:
.. code:: apache
DocumentRoot "/srv/http"
<Directory "/srv/http">
Options Indexes FollowSymLinks
AllowOverride None
Require all granted
</Directory>
The *welcome* page of Arch Linux is a page showing the directory located
at ``DocumentRoot``. This *directory* page is generated by the Module
`mod_autoindex <https://httpd.apache.org/docs/2.4/mod/mod_autoindex.html>`_:
.. code:: apache
LoadModule autoindex_module modules/mod_autoindex.so
...
Include conf/extra/httpd-autoindex.conf
.. group-tab:: Fedora / RHEL
.. code:: bash
less /etc/httpd/conf/httpd.conf
In this file, there is a line setting the ``DocumentRoot`` directive:
.. code:: apache
DocumentRoot "/var/www/html"
...
<Directory "/var/www">
AllowOverride None
# Allow open access:
Require all granted
</Directory>
On fresh installations, the ``/var/www`` is empty and the *default
welcome page* is shown, the configuration is located at::
less /etc/httpd/conf.d/welcome.conf
.. _Debian's Apache layout:
Debian's Apache layout
----------------------
Be aware, Debian's Apache layout is quite different from the standard Apache
configuration. For details look at the apache2.README.Debian_
(``/usr/share/doc/apache2/README.Debian.gz``). Some commands you should know on
Debian:
* :man:`apache2ctl`: Apache HTTP server control interface
* :man:`a2enmod`, :man:`a2dismod`: switch on/off modules
* :man:`a2enconf`, :man:`a2disconf`: switch on/off configurations
* :man:`a2ensite`, :man:`a2dissite`: switch on/off sites
.. _apache modules:
Apache modules
--------------
To load additional modules, in most distributions you have to uncomment the
lines with the corresponding LoadModule_ directive, except in :ref:`Debian's
Apache layout`.
.. tabs::
.. group-tab:: Ubuntu / debian
:ref:`Debian's Apache layout` uses :man:`a2enmod` and :man:`a2dismod` to
activate or disable modules:
.. code:: bash
sudo -H a2enmod ssl
sudo -H a2enmod headers
sudo -H a2enmod proxy
sudo -H a2enmod proxy_http
sudo -H a2enmod proxy_uwsgi
.. group-tab:: Arch Linux
In the ``/etc/httpd/conf/httpd.conf`` file, activate LoadModule_
directives:
.. code:: apache
LoadModule ssl_module modules/mod_ssl.so
LoadModule headers_module modules/mod_headers.so
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule proxy_uwsgi_module modules/mod_proxy_uwsgi.so
.. group-tab:: Fedora / RHEL
In the ``/etc/httpd/conf/httpd.conf`` file, activate LoadModule_
directives:
.. code:: apache
LoadModule ssl_module modules/mod_ssl.so
LoadModule headers_module modules/mod_headers.so
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule proxy_uwsgi_module modules/mod_proxy_uwsgi.so
.. _apache sites:
Apache sites
------------
.. tabs::
.. group-tab:: Ubuntu / debian
In :ref:`Debian's Apache layout` you create a ``searxng.conf`` with the
``<Location /searxng >`` directive and save this file in the *sites
available* folder at ``/etc/apache2/sites-available``. To enable the
``searxng.conf`` use :man:`a2ensite`:
.. code:: bash
sudo -H a2ensite searxng.conf
.. group-tab:: Arch Linux
In the ``/etc/httpd/conf/httpd.conf`` file add a IncludeOptional_
directive:
.. code:: apache
IncludeOptional sites-enabled/*.conf
Create two folders, one for the *available sites* and one for the *enabled sites*:
.. code:: bash
mkdir -p /etc/httpd/sites-available
mkdir -p /etc/httpd/sites-enabled
Create configuration at ``/etc/httpd/sites-available`` and place a
symlink to ``sites-enabled``:
.. code:: bash
sudo -H ln -s /etc/httpd/sites-available/searxng.conf \
/etc/httpd/sites-enabled/searxng.conf
.. group-tab:: Fedora / RHEL
In the ``/etc/httpd/conf/httpd.conf`` file add a IncludeOptional_
directive:
.. code:: apache
IncludeOptional sites-enabled/*.conf
Create two folders, one for the *available sites* and one for the *enabled sites*:
.. code:: bash
mkdir -p /etc/httpd/sites-available
mkdir -p /etc/httpd/sites-enabled
Create configuration at ``/etc/httpd/sites-available`` and place a
symlink to ``sites-enabled``:
.. code:: bash
sudo -H ln -s /etc/httpd/sites-available/searxng.conf \
/etc/httpd/sites-enabled/searxng.conf
.. _apache searxng site:
Apache's SearXNG site
=====================
.. _mod_uwsgi: https://uwsgi-docs.readthedocs.io/en/latest/Apache.html#mod-uwsgi
.. sidebar:: uWSGI
Use mod_proxy_uwsgi_ / don't use the old mod_uwsgi_ anymore.
To proxy the incoming requests to the SearXNG instance Apache needs the
mod_proxy_ module (:ref:`apache modules`).
.. sidebar:: HTTP headers
With ProxyPreserveHost_ the incoming ``Host`` header is passed to the proxied
host.
Depending on what your SearXNG installation is listening on, you need a http
mod_proxy_http_) or socket (mod_proxy_uwsgi_) communication to upstream.
The :ref:`installation scripts` installs the :ref:`reference setup
<use_default_settings.yml>` and a :ref:`uwsgi setup` that listens on a socket by default.
You can install and activate your own ``searxng.conf`` like shown in
:ref:`apache sites`.
.. tabs::
.. group-tab:: socket
.. kernel-include:: $DOCS_BUILD/includes/searxng.rst
:start-after: START apache socket
:end-before: END apache socket
.. group-tab:: http
.. kernel-include:: $DOCS_BUILD/includes/searxng.rst
:start-after: START apache http
:end-before: END apache http
.. _restart apache:
Restart service:
.. tabs::
.. group-tab:: Ubuntu / debian
.. code:: bash
sudo -H systemctl restart apache2
sudo -H service uwsgi restart searxng
.. group-tab:: Arch Linux
.. code:: bash
sudo -H systemctl restart httpd
sudo -H systemctl restart uwsgi@searxng
.. group-tab:: Fedora / RHEL
.. code:: bash
sudo -H systemctl restart httpd
sudo -H touch /etc/uwsgi.d/searxng.ini
disable logs
============
For better privacy you can disable Apache logs. In the examples above activate
one of the lines and `restart apache`_:
.. code:: apache
SetEnvIf Request_URI "/searxng" dontlog
# CustomLog /dev/null combined env=dontlog
The ``CustomLog`` directive disables logs for the entire (virtual) server, use it
when the URL of the service does not have a path component (``/searxng``), so when
SearXNG is located at root (``/``).
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