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@ -16,6 +16,12 @@ In this article we will show, how you can make use of Linux Containers (LXC_) in
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should have a serious meaning about the terms: *distributed*, *merge* and
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*linux container*.
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**hint**
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If you have issues with the internet connectivity of your containers read
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section :ref:`internet connectivity docker`.
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.. contents:: Contents
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:depth: 2
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:local:
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@ -25,38 +31,38 @@ In this article we will show, how you can make use of Linux Containers (LXC_) in
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Motivation
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==========
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Usually in our development cycle, we edit the sources and run some test and/or
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builds by using ``make`` :ref:`[ref] <makefile>` before we commit. This cycle
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is simple and perfect but might fail in some aspects we should not overlook.
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Most often in our development cycle, we edit the sources and run some test
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and/or builds by using ``make`` :ref:`[ref] <makefile>` before we commit. This
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cycle is simple and perfect but might fail in some aspects we should not
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overlook.
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**The environment in which we run all our development processes matters!**
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The :ref:`makefile` and the :ref:`make install` encapsulate a lot for us, but
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they do not have access to all prerequisites. For example, there may have
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dependencies on packages that are installed on the developer's desktop, but
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these tools do not have access to all prerequisites. For example, there may
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have dependencies on packages that are installed on developer's desktop, but
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usually are not preinstalled on a server or client system. Another example is;
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settings have been made to the software on developer's desktop that would never
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be set on a *production* system.
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**Linux Containers are isolate environments and not to mix up all the
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prerequisites from various projects on developer's desktop is always a good
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choice.**
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**Linux Containers are isolate environments**, we use them to not mix up all
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the prerequisites from various projects on developer's desktop.
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The scripts from :ref:`searx_utils` can divide in those to install and maintain
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software:
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software
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- :ref:`searxng.sh`
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and the script :ref:`lxc.sh`, with we can scale our installation, maintenance or
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even development tasks over a stack of isolated containers / what we call the:
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and the script
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**SearXNG LXC suite**
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- :ref:`lxc.sh`
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.. hint::
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with we can scale our installation, maintenance or even development tasks over a
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stack of isolated containers / what we call the:
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If you see any problems with the internet connectivity of your
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containers read section :ref:`internet connectivity docker`.
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- :ref:`searxng lxc suite`
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.. _lxcdev install searxng:
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Gentlemen, start your engines!
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==============================
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@ -69,7 +75,7 @@ once:
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.. tabs::
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.. group-tab:: desktop
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.. group-tab:: desktop (HOST)
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.. code:: bash
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@ -81,7 +87,7 @@ fork:
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.. tabs::
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.. group-tab:: desktop
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.. group-tab:: desktop (HOST)
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.. code:: bash
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@ -89,76 +95,61 @@ fork:
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$ git clone https://github.com/searxng/searxng.git searxng
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$ cd searxng
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The :ref:`lxc-searxng.env` consists of several images, see ``export
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LXC_SUITE=(...`` near by :origin:`utils/lxc-searxng.env#L19`. For this blog post
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we exercise on a archlinux_ image. The container of this image is named
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``searxng-archlinux``. Lets build the container, but be sure that this container
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does not already exists, so first lets remove possible old one:
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.. tabs::
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.. group-tab:: desktop
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.. code:: bash
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$ sudo -H ./utils/lxc.sh remove searxng-archlinux
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$ sudo -H ./utils/lxc.sh build searxng-archlinux
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.. sidebar:: The ``searxng-archlinux`` container
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is the base of all our exercises here.
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In this container we install all services :ref:`including searx, morty & filtron
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<lxc.sh install suite>` in once:
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The :ref:`lxc-searxng.env` consists of several images, see ``export
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LXC_SUITE=(...`` near by :origin:`utils/lxc-searxng.env#L19`.
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For this blog post we exercise on a archlinux_ image. The container of this
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image is named ``searxng-archlinux``.
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Lets build the container, but be sure that this container does not already
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exists, so first lets remove possible old one:
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.. tabs::
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.. group-tab:: desktop
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.. group-tab:: desktop (HOST)
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.. code:: bash
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$ sudo -H ./utils/lxc.sh install suite searxng-archlinux
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$ sudo -H ./utils/lxc.sh remove searxng-archlinux
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$ sudo -H ./utils/lxc.sh build searxng-archlinux
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To proxy HTTP from filtron and morty in the container to the outside of the
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container, install nginx into the container. Once for the bot blocker filtron:
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.. tabs::
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.. sidebar:: further read
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.. group-tab:: desktop
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- :ref:`lxc.sh install suite`
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- :ref:`installation nginx`
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.. code:: bash
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux \
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./utils/filtron.sh nginx install
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...
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INFO: got 429 from http://10.174.184.156/searx
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and once for the content sanitizer (content proxy morty):
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To install the complete :ref:`SearXNG suite <searxng lxc suite>` and the HTTP
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proxy :ref:`installation nginx` into the archlinux container run:
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.. tabs::
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.. group-tab:: desktop
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.. group-tab:: desktop (HOST)
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.. code:: bash
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux \
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./utils/morty.sh nginx install
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$ sudo -H ./utils/lxc.sh install suite searxng-archlinux
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$ sudo -H ./utils/lxc.sh cmd -- FORCE_TIMEOUT=0 ./utils/searxng.sh install nginx
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$ sudo ./utils/lxc.sh show suite | grep SEARXNG_URL
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...
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INFO: got 200 from http://10.174.184.156/morty/
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[searxng-archlinux] SEARXNG_URL : http://n.n.n.140/searxng
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.. sidebar:: Fully functional SearXNG suite
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From here on you have a fully functional SearXNG suite running with bot
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blocker (filtron) and WEB content sanitizer (content proxy morty), both are
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needed for a *privacy protecting* search engine.
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From here on you have a fully functional SearXNG suite (including a
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:ref:`redis db`).
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On your system, the IP of your ``searxng-archlinux`` container differs from
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http://10.174.184.156/searx, just open the URL reported in your installation
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protocol in your WEB browser from the desktop to test the instance from outside
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of the container.
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In such a SearXNG suite admins can maintain and access the debug log of the
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services quite easy.
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In such a earXNG suite admins can maintain and access the debug log of the
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different services quite easy.
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In the example above the SearXNG instance in the container is wrapped to
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``http://n.n.n.140/searxng`` to the HOST system. Note, on your HOST system, the
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IP of your ``searxng-archlinux`` container is different to this example. To
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test the instance in the conatiner from outside of the container, in your WEB
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browser on your desktop just open the URL reported in your installation
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.. _working in containers:
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@ -166,77 +157,76 @@ In containers, work as usual
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============================
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Usually you open a root-bash using ``sudo -H bash``. In case of LXC containers
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open the root-bash in the container using ``./utils/lxc.sh cmd
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searxng-archlinux``:
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open the root-bash in the container is done by the ``./utils/lxc.sh cmd
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searxng-archlinux`` command:
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.. tabs::
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.. group-tab:: desktop
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.. group-tab:: desktop (HOST)
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.. code:: bash
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux bash
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INFO: [searxng-archlinux] bash
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[root@searxng-archlinux searx]# pwd
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/share/searxng
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[root@searxng-archlinux SearXNG]$
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The prompt ``[root@searxng-archlinux ...]`` signals, that you are the root user in
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the searxng-container. To debug the running SearXNG instance use:
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The prompt ``[root@searxng-archlinux ...]`` signals, that you are the root user
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in the container (GUEST). To debug the running SearXNG instance use:
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.. tabs::
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.. group-tab:: root@searxng-archlinux
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.. group-tab:: ``[root@searxng-archlinux SearXNG]`` (GUEST)
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.. code:: bash
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$ ./utils/searx.sh inspect service
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$ ./utils/searxng.sh instance inspect
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...
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use [CTRL-C] to stop monitoring the log
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...
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Back in the browser on your desktop open the service http://10.174.184.156/searx
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.. group-tab:: desktop (HOST)
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.. code:: bash
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux ./utils/searxng.sh instance inspect
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...
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use [CTRL-C] to stop monitoring the log
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...
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Back in the browser on your desktop open the service http://n.n.n.140/searxng
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and run your application tests while the debug log is shown in the terminal from
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above. You can stop monitoring using ``CTRL-C``, this also disables the *"debug
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option"* in SearXNG's settings file and restarts the SearXNG uwsgi application.
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To debug services from filtron and morty analogous use:
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Another point we have to notice is that the service (:ref:`SearXNG <searxng.sh>`
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Another point we have to notice is that the service :ref:`SearXNG <searxng.sh>`
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runs under dedicated system user account with the same name (compare
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:ref:`create searxng user`). To get a shell from these accounts, simply call:
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:ref:`create searxng user`). To get a login shell from these accounts, simply
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call:
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.. tabs::
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.. group-tab:: root@searxng-archlinux
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.. group-tab:: ``[root@searxng-archlinux SearXNG]`` (GUEST)
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.. code:: bash
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$ ./utils/searxng.sh instance cmd bash
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To get in touch, open a shell from the service user (searxng@searxng-archlinux):
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.. tabs::
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$ ./utils/searxng.sh instance cmd bash -l
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(searx-pyenv) [searxng@searxng-archlinux ~]$ pwd
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/usr/local/searxng
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.. group-tab:: desktop
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.. group-tab:: desktop (HOST)
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.. code:: bash
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux ./utils/searxng.sh instance cmd bash
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INFO: [searxng-archlinux] ./utils/searxng.sh instance cmd bash
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[searxng@searxng-archlinux ~]$
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux ./utils/searxng.sh instance cmd bash -l
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INFO: [searxng-archlinux] ./utils/searxng.sh instance cmd bash -l
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(searx-pyenv) [searxng@searxng-archlinux ~]$ pwd
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/usr/local/searxng
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The prompt ``[searxng@searxng-archlinux]`` signals that you are logged in as system
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user ``searx`` in the ``searxng-archlinux`` container and the python *virtualenv*
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user ``searxng`` in the ``searxng-archlinux`` container and the python *virtualenv*
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``(searxng-pyenv)`` environment is activated.
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.. tabs::
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.. group-tab:: searxng@searxng-archlinux
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.. code:: bash
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(searxng-pyenv) [searxng@searxng-archlinux ~]$ pwd
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/usr/local/searxng
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Wrap production into developer suite
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====================================
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@ -256,12 +246,11 @@ With the use of the :ref:`searxng.sh` the SearXNG service was installed as
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.. tabs::
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.. group-tab:: desktop
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.. group-tab:: uwsgi@searxng
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.. code:: bash
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux \
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systemctl stop uwsgi@searxng
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux systemctl stop uwsgi@searxng
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With the command above, we stopped the SearXNG uWSGI-App in the archlinux
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container.
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@ -278,17 +267,25 @@ least you should attend the settings of ``uid``, ``chdir``, ``env`` and
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virtualenv = /usr/local/searxng/searxng-pyenv
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pythonpath = /usr/local/searxng/searxng-src
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If you have read the :ref:`"Good to know section" <lxc.sh>` you remember, that
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each container shares the root folder of the repository and the command
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``utils/lxc.sh cmd`` handles relative path names **transparent**. To wrap the
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SearXNG installation into a developer one, we simple have to create a smylink to
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the **transparent** reposetory from the desktop. Now lets replace the
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repository at ``searxng-src`` in the container with the working tree from outside
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of the container:
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If you have read the :ref:`Good to know` you remember, that each container
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shares the root folder of the repository and the command ``utils/lxc.sh cmd``
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handles relative path names **transparent**.
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To wrap the SearXNG installation in the container into a developer one, we
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simple have to create a smylink to the **transparent** reposetory from the
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desktop. Now lets replace the repository at ``searxng-src`` in the container
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with the working tree from outside of the container:
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.. tabs::
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.. group-tab:: container becomes a developer suite
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.. group-tab:: ``[root@searxng-archlinux SearXNG]`` (GUEST)
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.. code:: bash
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$ mv /usr/local/searxng/searxng-src /usr/local/searxng/searxng-src.old
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$ ln -s /share/SearXNG/ /usr/local/searxng/searxng-src
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.. group-tab:: desktop (HOST)
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.. code:: bash
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@ -296,7 +293,7 @@ of the container:
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mv /usr/local/searxng/searxng-src /usr/local/searxng/searxng-src.old
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux \
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ln -s /share/searx/ /usr/local/searxng/searxng-src
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ln -s /share/SearXNG/ /usr/local/searxng/searxng-src
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Now we can develop as usual in the working tree of our desktop system. Every
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time the software was changed, you have to restart the SearXNG service (in the
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@ -304,48 +301,83 @@ container):
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.. tabs::
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.. group-tab:: desktop
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.. group-tab:: uwsgi@searxng
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.. code:: bash
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux \
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systemctl restart uwsgi@searx
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux systemctl restart uwsgi@searxng
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Remember: :ref:`working in containers` .. here are just some examples from my
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daily usage:
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To *inspect* the SearXNG instance (already described above):
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.. tabs::
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.. group-tab:: desktop
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.. group-tab:: ``[root@searxng-archlinux SearXNG]`` (GUEST)
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To *inspect* the SearXNG instance (already described above):
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.. code:: bash
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$ ./utils/searx.sh inspect service
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.. group-tab:: desktop (HOST)
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.. code:: bash
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux \
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./utils/searx.sh inspect service
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux ./utils/searx.sh inspect service
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Run :ref:`makefile`, e.g. to test inside the container:
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Run :ref:`makefile`, e.g. to test inside the container:
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.. tabs::
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.. group-tab:: ``[root@searxng-archlinux SearXNG]`` (GUEST)
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.. code:: bash
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux \
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make test
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$ make test
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To install all prerequisites needed for a :ref:`buildhosts`:
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.. group-tab:: desktop (HOST)
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.. code:: bash
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux \
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./utils/searxng.sh install buildhost
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux make test
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To build the docs on a buildhost :ref:`buildhosts`:
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To install all prerequisites needed for a :ref:`buildhosts`:
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|
.. tabs::
|
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|
.. group-tab:: ``[root@searxng-archlinux SearXNG]`` (GUEST)
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|
.. code:: bash
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$ sudo -H ./utils/lxc.sh cmd searxng-archlinux \
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|
|
make docs.html
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|
|
$ ./utils/searxng.sh install buildhost
|
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|
.. group-tab:: desktop (HOST)
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|
.. code:: bash
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|
$ sudo -H ./utils/lxc.sh cmd searxng-archlinux ./utils/searxng.sh install buildhost
|
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To build the docs on a buildhost :ref:`buildhosts`:
|
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|
.. tabs::
|
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|
.. group-tab:: ``[root@searxng-archlinux SearXNG]`` (GUEST)
|
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|
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|
.. code:: bash
|
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|
|
$ make docs.html
|
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|
.. group-tab:: desktop (HOST)
|
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|
.. code:: bash
|
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|
|
$ sudo -H ./utils/lxc.sh cmd searxng-archlinux make docs.html
|
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|
|
.. _lxcdev summary:
|
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|
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|
|
@ -356,48 +388,51 @@ We build up a fully functional SearXNG suite in a archlinux container:
|
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|
|
|
|
|
|
|
.. code:: bash
|
|
|
|
|
|
|
|
|
|
$ sudo -H ./utils/lxc.sh build searxng-archlinux
|
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|
|
|
$ sudo -H ./utils/lxc.sh install suite searxng-archlinux
|
|
|
|
|
...
|
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|
|
Developer install? (wraps source from HOST into the running instance) [YES/no]
|
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|
|
|
|
|
|
|
|
To access HTTP from the desktop we installed nginx for the services inside the
|
|
|
|
|
container:
|
|
|
|
|
To wrap the suite into a developer one answer ``YES`` (or press Enter).
|
|
|
|
|
|
|
|
|
|
.. tabs::
|
|
|
|
|
.. code:: text
|
|
|
|
|
|
|
|
|
|
.. group-tab:: [root@searxng-archlinux]
|
|
|
|
|
link SearXNG's sources to: /share/SearXNG
|
|
|
|
|
=========================================
|
|
|
|
|
|
|
|
|
|
.. code:: bash
|
|
|
|
|
mv -f "/usr/local/searxng/searxng-src" "/usr/local/searxng/searxng-src.backup"
|
|
|
|
|
ln -s "/share/SearXNG" "/usr/local/searxng/searxng-src"
|
|
|
|
|
ls -ld /usr/local/searxng/searxng-src
|
|
|
|
|
|searxng| lrwxrwxrwx 1 searxng searxng ... /usr/local/searxng/searxng-src -> /share/SearXNG
|
|
|
|
|
|
|
|
|
|
$ ./utils/filtron.sh nginx install
|
|
|
|
|
$ ./utils/morty.sh nginx install
|
|
|
|
|
On code modification the instance has to be restarted (see :ref:`uWSGI
|
|
|
|
|
maintenance`):
|
|
|
|
|
|
|
|
|
|
To wrap the suite into a developer one, we created a symbolic link to the
|
|
|
|
|
repository which is shared **transparent** from the desktop's file system into
|
|
|
|
|
the container :
|
|
|
|
|
.. code:: bash
|
|
|
|
|
|
|
|
|
|
.. tabs::
|
|
|
|
|
$ sudo -H ./utils/lxc.sh cmd searxng-archlinux systemctl restart uwsgi@searxng
|
|
|
|
|
|
|
|
|
|
.. group-tab:: [root@searxng-archlinux]
|
|
|
|
|
To access HTTP from the desktop we installed nginx for the services inside the
|
|
|
|
|
container:
|
|
|
|
|
|
|
|
|
|
.. code:: bash
|
|
|
|
|
.. code:: bash
|
|
|
|
|
|
|
|
|
|
$ mv /usr/local/searxng/searxng-src /usr/local/searxng/searxng-src.old
|
|
|
|
|
$ ln -s /share/searx/ /usr/local/searxng/searxng-src
|
|
|
|
|
$ systemctl restart uwsgi@searx
|
|
|
|
|
$ sudo -H ./utils/lxc.sh cmd -- FORCE_TIMEOUT=0 ./utils/searxng.sh install nginx
|
|
|
|
|
|
|
|
|
|
To get information about the searxNG suite in the archlinux container we can
|
|
|
|
|
To get information about the SearxNG suite in the archlinux container we can
|
|
|
|
|
use:
|
|
|
|
|
|
|
|
|
|
.. tabs::
|
|
|
|
|
|
|
|
|
|
.. group-tab:: desktop
|
|
|
|
|
|
|
|
|
|
.. code:: bash
|
|
|
|
|
|
|
|
|
|
$ sudo -H ./utils/lxc.sh show suite searxng-archlinux
|
|
|
|
|
...
|
|
|
|
|
[searxng-archlinux] INFO: (eth0) filtron: http://10.174.184.156:4004/ http://10.174.184.156/searx
|
|
|
|
|
[searxng-archlinux] INFO: (eth0) morty: http://10.174.184.156:3000/
|
|
|
|
|
[searxng-archlinux] INFO: (eth0) docs.live: http://10.174.184.156:8080/
|
|
|
|
|
[searxng-archlinux] INFO: (eth0) IPv6: http://[fd42:573b:e0b3:e97e:216:3eff:fea5:9b65]
|
|
|
|
|
...
|
|
|
|
|
.. code:: text
|
|
|
|
|
|
|
|
|
|
$ sudo -H ./utils/lxc.sh show suite searxng-archlinux
|
|
|
|
|
[searxng-archlinux] INFO: (eth0) docs-live: http:///n.n.n.140:8080/
|
|
|
|
|
[searxng-archlinux] INFO: (eth0) IPv6: http://[fd42:555b:2af9:e121:216:3eff:fe5b:1744]
|
|
|
|
|
[searxng-archlinux] uWSGI:
|
|
|
|
|
[searxng-archlinux] SEARXNG_UWSGI_SOCKET : /usr/local/searxng/run/socket
|
|
|
|
|
[searxng-archlinux] environment /usr/local/searxng/searxng-src/utils/brand.env:
|
|
|
|
|
[searxng-archlinux] GIT_URL : https://github.com/searxng/searxng
|
|
|
|
|
[searxng-archlinux] GIT_BRANCH : master
|
|
|
|
|
[searxng-archlinux] SEARXNG_URL : http:///n.n.n.140/searxng
|
|
|
|
|
[searxng-archlinux] SEARXNG_PORT : 8888
|
|
|
|
|
[searxng-archlinux] SEARXNG_BIND_ADDRESS : 127.0.0.1
|
|
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|
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|
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|
|