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build from commit 3535377c9aa777d95888a853d813e94fbbae5489
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<section id="developing-in-linux-containers">
<span id="lxcdev"></span><h1>Developing in Linux Containers<a class="headerlink" href="#developing-in-linux-containers" title="Link to this heading"></a></h1>
<p>In this article we will show, how you can make use of Linux Containers (<a class="reference external" href="https://linuxcontainers.org/lxc/introduction/">LXC</a>) in
<em>distributed and heterogeneous development cycles</em> (TL;DR; jump to the
<a class="reference internal" href="#lxcdev-summary"><span class="std std-ref">Summary</span></a>).</p>
<aside class="sidebar">
<p class="sidebar-title">Audience</p>
<p>This blog post is written for experienced admins and developers. Readers
should have a serious meaning about the terms: <em>distributed</em>, <em>merge</em> and
<em>linux container</em>.</p>
<p><strong>hint</strong></p>
<p>If you have issues with the internet connectivity of your containers read
section <a class="reference internal" href="../utils/lxc.sh.html#internet-connectivity-docker"><span class="std std-ref">Internet Connectivity &amp; Docker</span></a>.</p>
</aside>
<nav class="contents local" id="contents">
<ul class="simple">
<li><p><a class="reference internal" href="#motivation" id="id1">Motivation</a></p></li>
<li><p><a class="reference internal" href="#gentlemen-start-your-engines" id="id2">Gentlemen, start your engines!</a></p></li>
<li><p><a class="reference internal" href="#in-containers-work-as-usual" id="id3">In containers, work as usual</a></p></li>
<li><p><a class="reference internal" href="#wrap-production-into-developer-suite" id="id4">Wrap production into developer suite</a></p></li>
<li><p><a class="reference internal" href="#summary" id="id5">Summary</a></p></li>
</ul>
</nav>
<section id="motivation">
<h2><a class="toc-backref" href="#id1" role="doc-backlink">Motivation</a><a class="headerlink" href="#motivation" title="Link to this heading"></a></h2>
<p>Most often in our development cycle, we edit the sources and run some test
and/or builds by using <code class="docutils literal notranslate"><span class="pre">make</span></code> <a class="reference internal" href="makefile.html#makefile"><span class="std std-ref">[ref]</span></a> before we commit. This
cycle is simple and perfect but might fail in some aspects we should not
overlook.</p>
<blockquote>
<div><p><strong>The environment in which we run all our development processes matters!</strong></p>
</div></blockquote>
<p>The <a class="reference internal" href="makefile.html#makefile"><span class="std std-ref">Makefile &amp; ./manage</span></a> and the <a class="reference internal" href="makefile.html#make-install"><span class="std std-ref">Python environment (make install)</span></a> encapsulate a lot for us, but
these tools do not have access to all prerequisites. For example, there may
have dependencies on packages that are installed on developer’s desktop, but
usually are not preinstalled on a server or client system. Another example is;
settings have been made to the software on developer’s desktop that would never
be set on a <em>production</em> system.</p>
<blockquote>
<div><p><strong>Linux Containers are isolate environments</strong>, we use them to not mix up all
the prerequisites from various projects on developer’s desktop.</p>
</div></blockquote>
<p>The scripts from <a class="reference internal" href="../utils/index.html#searx-utils"><span class="std std-ref">DevOps tooling box</span></a> can divide in those to install and maintain
software</p>
<ul class="simple">
<li><p><a class="reference internal" href="../utils/searxng.sh.html#searxng-sh"><span class="std std-ref">utils/searxng.sh</span></a></p></li>
</ul>
<p>and the script</p>
<ul class="simple">
<li><p><a class="reference internal" href="../utils/lxc.sh.html#lxc-sh"><span class="std std-ref">utils/lxc.sh</span></a></p></li>
</ul>
<p>with we can scale our installation, maintenance or even development tasks over a
stack of isolated containers / what we call the:</p>
<ul class="simple">
<li><p><a class="reference internal" href="../utils/lxc.sh.html#searxng-lxc-suite"><span class="std std-ref">SearXNG LXC suite</span></a></p></li>
</ul>
</section>
<section id="gentlemen-start-your-engines">
<span id="lxcdev-install-searxng"></span><h2><a class="toc-backref" href="#id2" role="doc-backlink">Gentlemen, start your engines!</a><a class="headerlink" href="#gentlemen-start-your-engines" title="Link to this heading"></a></h2>
<p>Before you can start with containers, you need to install and initiate <a class="reference external" href="https://linuxcontainers.org/lxd/introduction/">LXD</a>
once:</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-0-ZGVza3RvcCAoSE9TVCk=" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-0-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tab" tabindex="0">desktop (HOST)</button></div><div aria-labelledby="tab-0-ZGVza3RvcCAoSE9TVCk=" class="sphinx-tabs-panel group-tab" id="panel-0-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>snap<span class="w"> </span>install<span class="w"> </span>lxd
$<span class="w"> </span>lxd<span class="w"> </span>init<span class="w"> </span>--auto
</pre></div>
</div>
</div></div>
<p>And you need to clone from origin or if you have your own fork, clone from your
fork:</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-1-ZGVza3RvcCAoSE9TVCk=" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-1-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tab" tabindex="0">desktop (HOST)</button></div><div aria-labelledby="tab-1-ZGVza3RvcCAoSE9TVCk=" class="sphinx-tabs-panel group-tab" id="panel-1-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span><span class="nb">cd</span><span class="w"> </span>~/Downloads
$<span class="w"> </span>git<span class="w"> </span>clone<span class="w"> </span>https://github.com/searxng/searxng.git<span class="w"> </span>searxng
$<span class="w"> </span><span class="nb">cd</span><span class="w"> </span>searxng
</pre></div>
</div>
</div></div>
<aside class="sidebar">
<p class="sidebar-title">The <code class="docutils literal notranslate"><span class="pre">searxng-archlinux</span></code> container</p>
<p>is the base of all our exercises here.</p>
</aside>
<p>The <a class="reference internal" href="../utils/lxc.sh.html#lxc-searxng-env"><span class="std std-ref">SearXNG suite config</span></a> consists of several images, see <code class="docutils literal notranslate"><span class="pre">export</span>
<span class="pre">LXC_SUITE=(...</span></code> near by <a class="reference external" href="https://github.com/searxng/searxng/blob/master/utils/lxc-searxng.env#L19">git://utils/lxc-searxng.env#L19</a>.
For this blog post we exercise on a <a class="reference external" href="https://www.archlinux.org/">archlinux</a> image. The container of this
image is named <code class="docutils literal notranslate"><span class="pre">searxng-archlinux</span></code>.</p>
<p>Lets build the container, but be sure that this container does not already
exists, so first lets remove possible old one:</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-2-ZGVza3RvcCAoSE9TVCk=" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-2-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tab" tabindex="0">desktop (HOST)</button></div><div aria-labelledby="tab-2-ZGVza3RvcCAoSE9TVCk=" class="sphinx-tabs-panel group-tab" id="panel-2-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>remove<span class="w"> </span>searxng-archlinux
$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>build<span class="w"> </span>searxng-archlinux
</pre></div>
</div>
</div></div>
<aside class="sidebar">
<p class="sidebar-title">further read</p>
<ul class="simple">
<li><p><a class="reference internal" href="../utils/lxc.sh.html#lxc-sh-install-suite"><span class="std std-ref">Install suite</span></a></p></li>
<li><p><a class="reference internal" href="../admin/installation-nginx.html#installation-nginx"><span class="std std-ref">NGINX</span></a></p></li>
</ul>
</aside>
<p>To install the complete <a class="reference internal" href="../utils/lxc.sh.html#searxng-lxc-suite"><span class="std std-ref">SearXNG suite</span></a> and the HTTP
proxy <a class="reference internal" href="../admin/installation-nginx.html#installation-nginx"><span class="std std-ref">NGINX</span></a> into the archlinux container run:</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-3-ZGVza3RvcCAoSE9TVCk=" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-3-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tab" tabindex="0">desktop (HOST)</button></div><div aria-labelledby="tab-3-ZGVza3RvcCAoSE9TVCk=" class="sphinx-tabs-panel group-tab" id="panel-3-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>install<span class="w"> </span>suite<span class="w"> </span>searxng-archlinux
$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>--<span class="w"> </span><span class="nv">FORCE_TIMEOUT</span><span class="o">=</span><span class="m">0</span><span class="w"> </span>./utils/searxng.sh<span class="w"> </span>install<span class="w"> </span>nginx
$<span class="w"> </span>sudo<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>show<span class="w"> </span>suite<span class="w"> </span><span class="p">|</span><span class="w"> </span>grep<span class="w"> </span>SEARXNG_URL
...
<span class="o">[</span>searxng-archlinux<span class="o">]</span><span class="w"> </span>SEARXNG_URL<span class="w"> </span>:<span class="w"> </span>http://n.n.n.140/searxng
</pre></div>
</div>
</div></div>
<aside class="sidebar">
<p class="sidebar-title">Fully functional SearXNG suite</p>
<p>From here on you have a fully functional SearXNG suite (including a
<a class="reference internal" href="../src/searx.redisdb.html#redis-db"><span class="std std-ref">Redis DB</span></a>).</p>
</aside>
<p>In such a SearXNG suite admins can maintain and access the debug log of the
services quite easy.</p>
<p>In the example above the SearXNG instance in the container is wrapped to
<code class="docutils literal notranslate"><span class="pre">http://n.n.n.140/searxng</span></code> to the HOST system. Note, on your HOST system, the
IP of your <code class="docutils literal notranslate"><span class="pre">searxng-archlinux</span></code> container is different to this example. To
test the instance in the container from outside of the container, in your WEB
browser on your desktop just open the URL reported in your installation</p>
</section>
<section id="in-containers-work-as-usual">
<span id="working-in-containers"></span><h2><a class="toc-backref" href="#id3" role="doc-backlink">In containers, work as usual</a><a class="headerlink" href="#in-containers-work-as-usual" title="Link to this heading"></a></h2>
<p>Usually you open a root-bash using <code class="docutils literal notranslate"><span class="pre">sudo</span> <span class="pre">-H</span> <span class="pre">bash</span></code>. In case of LXC containers
open the root-bash in the container is done by the <code class="docutils literal notranslate"><span class="pre">./utils/lxc.sh</span> <span class="pre">cmd</span>
<span class="pre">searxng-archlinux</span></code> command:</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-4-ZGVza3RvcCAoSE9TVCk=" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-4-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tab" tabindex="0">desktop (HOST)</button></div><div aria-labelledby="tab-4-ZGVza3RvcCAoSE9TVCk=" class="sphinx-tabs-panel group-tab" id="panel-4-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>searxng-archlinux<span class="w"> </span>bash
INFO:<span class="w"> </span><span class="o">[</span>searxng-archlinux<span class="o">]</span><span class="w"> </span>bash
<span class="o">[</span>root@searxng-archlinux<span class="w"> </span>SearXNG<span class="o">]</span>$
</pre></div>
</div>
</div></div>
<p>The prompt <code class="docutils literal notranslate"><span class="pre">[root&#64;searxng-archlinux</span> <span class="pre">...]</span></code> signals, that you are the root user
in the container (GUEST). To debug the running SearXNG instance use:</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-5-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-5-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tab" tabindex="0"><code class="docutils literal notranslate"><span class="pre">[root&#64;searxng-archlinux</span> <span class="pre">SearXNG]</span></code> (GUEST)</button><button aria-controls="panel-5-ZGVza3RvcCAoSE9TVCk=" aria-selected="false" class="sphinx-tabs-tab group-tab" id="tab-5-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tab" tabindex="-1">desktop (HOST)</button></div><div aria-labelledby="tab-5-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" class="sphinx-tabs-panel group-tab" id="panel-5-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>./utils/searxng.sh<span class="w"> </span>instance<span class="w"> </span>inspect
...
use<span class="w"> </span><span class="o">[</span>CTRL-C<span class="o">]</span><span class="w"> </span>to<span class="w"> </span>stop<span class="w"> </span>monitoring<span class="w"> </span>the<span class="w"> </span>log
...
</pre></div>
</div>
</div><div aria-labelledby="tab-5-ZGVza3RvcCAoSE9TVCk=" class="sphinx-tabs-panel group-tab" hidden="true" id="panel-5-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>searxng-archlinux<span class="w"> </span>./utils/searxng.sh<span class="w"> </span>instance<span class="w"> </span>inspect
...
use<span class="w"> </span><span class="o">[</span>CTRL-C<span class="o">]</span><span class="w"> </span>to<span class="w"> </span>stop<span class="w"> </span>monitoring<span class="w"> </span>the<span class="w"> </span>log
...
</pre></div>
</div>
</div></div>
<p>Back in the browser on your desktop open the service <a class="reference external" href="http://n.n.n.140/searxng">http://n.n.n.140/searxng</a>
and run your application tests while the debug log is shown in the terminal from
above. You can stop monitoring using <code class="docutils literal notranslate"><span class="pre">CTRL-C</span></code>, this also disables the <em>“debug
option”</em> in SearXNG’s settings file and restarts the SearXNG uwsgi application.</p>
<p>Another point we have to notice is that the service <a class="reference internal" href="../utils/searxng.sh.html#searxng-sh"><span class="std std-ref">SearXNG</span></a>
runs under dedicated system user account with the same name (compare
<a class="reference internal" href="../admin/installation-searxng.html#create-searxng-user"><span class="std std-ref">Create user</span></a>). To get a login shell from these accounts, simply
call:</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-6-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-6-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tab" tabindex="0"><code class="docutils literal notranslate"><span class="pre">[root&#64;searxng-archlinux</span> <span class="pre">SearXNG]</span></code> (GUEST)</button><button aria-controls="panel-6-ZGVza3RvcCAoSE9TVCk=" aria-selected="false" class="sphinx-tabs-tab group-tab" id="tab-6-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tab" tabindex="-1">desktop (HOST)</button></div><div aria-labelledby="tab-6-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" class="sphinx-tabs-panel group-tab" id="panel-6-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>./utils/searxng.sh<span class="w"> </span>instance<span class="w"> </span>cmd<span class="w"> </span>bash<span class="w"> </span>-l
<span class="o">(</span>searx-pyenv<span class="o">)</span><span class="w"> </span><span class="o">[</span>searxng@searxng-archlinux<span class="w"> </span>~<span class="o">]</span>$<span class="w"> </span><span class="nb">pwd</span>
/usr/local/searxng
</pre></div>
</div>
</div><div aria-labelledby="tab-6-ZGVza3RvcCAoSE9TVCk=" class="sphinx-tabs-panel group-tab" hidden="true" id="panel-6-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>searxng-archlinux<span class="w"> </span>./utils/searxng.sh<span class="w"> </span>instance<span class="w"> </span>cmd<span class="w"> </span>bash<span class="w"> </span>-l
INFO:<span class="w"> </span><span class="o">[</span>searxng-archlinux<span class="o">]</span><span class="w"> </span>./utils/searxng.sh<span class="w"> </span>instance<span class="w"> </span>cmd<span class="w"> </span>bash<span class="w"> </span>-l
<span class="o">(</span>searx-pyenv<span class="o">)</span><span class="w"> </span><span class="o">[</span>searxng@searxng-archlinux<span class="w"> </span>~<span class="o">]</span>$<span class="w"> </span><span class="nb">pwd</span>
/usr/local/searxng
</pre></div>
</div>
</div></div>
<p>The prompt <code class="docutils literal notranslate"><span class="pre">[searxng&#64;searxng-archlinux]</span></code> signals that you are logged in as system
user <code class="docutils literal notranslate"><span class="pre">searxng</span></code> in the <code class="docutils literal notranslate"><span class="pre">searxng-archlinux</span></code> container and the python <em>virtualenv</em>
<code class="docutils literal notranslate"><span class="pre">(searxng-pyenv)</span></code> environment is activated.</p>
</section>
<section id="wrap-production-into-developer-suite">
<h2><a class="toc-backref" href="#id4" role="doc-backlink">Wrap production into developer suite</a><a class="headerlink" href="#wrap-production-into-developer-suite" title="Link to this heading"></a></h2>
<p>In this section we will see how to change the <em>“Fully functional SearXNG suite”</em>
from a LXC container (which is quite ready for production) into a developer
suite. For this, we have to keep an eye on the <a class="reference internal" href="../admin/installation-searxng.html#installation-basic"><span class="std std-ref">Step by step installation</span></a>:</p>
<ul class="simple">
<li><p>SearXNG setup in: <code class="docutils literal notranslate"><span class="pre">/etc/searxng/settings.yml</span></code></p></li>
<li><p>SearXNG user’s home: <code class="docutils literal notranslate"><span class="pre">/usr/local/searxng</span></code></p></li>
<li><p>virtualenv in: <code class="docutils literal notranslate"><span class="pre">/usr/local/searxng/searxng-pyenv</span></code></p></li>
<li><p>SearXNG software in: <code class="docutils literal notranslate"><span class="pre">/usr/local/searxng/searxng-src</span></code></p></li>
</ul>
<p>With the use of the <a class="reference internal" href="../utils/searxng.sh.html#searxng-sh"><span class="std std-ref">utils/searxng.sh</span></a> the SearXNG service was installed as
<a class="reference internal" href="../admin/installation-uwsgi.html#searxng-uwsgi"><span class="std std-ref">uWSGI application</span></a>. To maintain this service, we can use
<code class="docutils literal notranslate"><span class="pre">systemctl</span></code> (compare <a class="reference internal" href="../admin/installation-uwsgi.html#uwsgi-maintenance"><span class="std std-ref">uWSGI maintenance</span></a>).</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-7-dXdzZ2lAc2VhcnhuZw==" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-7-dXdzZ2lAc2VhcnhuZw==" name="dXdzZ2lAc2VhcnhuZw==" role="tab" tabindex="0"><a class="reference external" href="mailto:uwsgi&#37;&#52;&#48;searxng">uwsgi<span>&#64;</span>searxng</a></button></div><div aria-labelledby="tab-7-dXdzZ2lAc2VhcnhuZw==" class="sphinx-tabs-panel group-tab" id="panel-7-dXdzZ2lAc2VhcnhuZw==" name="dXdzZ2lAc2VhcnhuZw==" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>searxng-archlinux<span class="w"> </span>systemctl<span class="w"> </span>stop<span class="w"> </span>uwsgi@searxng
</pre></div>
</div>
</div></div>
<p>With the command above, we stopped the SearXNG uWSGI-App in the archlinux
container.</p>
<p>The uWSGI-App for the archlinux distros is configured in
<a class="reference external" href="https://github.com/searxng/searxng/blob/master/utils/templates/etc/uwsgi/apps-archlinux/searxng.ini">git://utils/templates/etc/uwsgi/apps-archlinux/searxng.ini</a>, from where at
least you should attend the settings of <code class="docutils literal notranslate"><span class="pre">uid</span></code>, <code class="docutils literal notranslate"><span class="pre">chdir</span></code>, <code class="docutils literal notranslate"><span class="pre">env</span></code> and
<code class="docutils literal notranslate"><span class="pre">http</span></code>:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">env</span> <span class="o">=</span> <span class="n">SEARXNG_SETTINGS_PATH</span><span class="o">=/</span><span class="n">etc</span><span class="o">/</span><span class="n">searxng</span><span class="o">/</span><span class="n">settings</span><span class="o">.</span><span class="n">yml</span>
<span class="n">http</span> <span class="o">=</span> <span class="mf">127.0.0.1</span><span class="p">:</span><span class="mi">8888</span>
<span class="n">chdir</span> <span class="o">=</span> <span class="o">/</span><span class="n">usr</span><span class="o">/</span><span class="n">local</span><span class="o">/</span><span class="n">searxng</span><span class="o">/</span><span class="n">searxng</span><span class="o">-</span><span class="n">src</span><span class="o">/</span><span class="n">searx</span>
<span class="n">virtualenv</span> <span class="o">=</span> <span class="o">/</span><span class="n">usr</span><span class="o">/</span><span class="n">local</span><span class="o">/</span><span class="n">searxng</span><span class="o">/</span><span class="n">searxng</span><span class="o">-</span><span class="n">pyenv</span>
<span class="n">pythonpath</span> <span class="o">=</span> <span class="o">/</span><span class="n">usr</span><span class="o">/</span><span class="n">local</span><span class="o">/</span><span class="n">searxng</span><span class="o">/</span><span class="n">searxng</span><span class="o">-</span><span class="n">src</span>
</pre></div>
</div>
<p>If you have read the <a class="reference internal" href="../utils/lxc.sh.html#good-to-know"><span class="std std-ref">Good to know</span></a> you remember, that each container
shares the root folder of the repository and the command <code class="docutils literal notranslate"><span class="pre">utils/lxc.sh</span> <span class="pre">cmd</span></code>
handles relative path names <strong>transparent</strong>.</p>
<p>To wrap the SearXNG installation in the container into a developer one, we
simple have to create a symlink to the <strong>transparent</strong> repository from the
desktop. Now lets replace the repository at <code class="docutils literal notranslate"><span class="pre">searxng-src</span></code> in the container
with the working tree from outside of the container:</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-8-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-8-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tab" tabindex="0"><code class="docutils literal notranslate"><span class="pre">[root&#64;searxng-archlinux</span> <span class="pre">SearXNG]</span></code> (GUEST)</button><button aria-controls="panel-8-ZGVza3RvcCAoSE9TVCk=" aria-selected="false" class="sphinx-tabs-tab group-tab" id="tab-8-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tab" tabindex="-1">desktop (HOST)</button></div><div aria-labelledby="tab-8-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" class="sphinx-tabs-panel group-tab" id="panel-8-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>mv<span class="w"> </span>/usr/local/searxng/searxng-src<span class="w"> </span>/usr/local/searxng/searxng-src.old
$<span class="w"> </span>ln<span class="w"> </span>-s<span class="w"> </span>/share/SearXNG/<span class="w"> </span>/usr/local/searxng/searxng-src
</pre></div>
</div>
</div><div aria-labelledby="tab-8-ZGVza3RvcCAoSE9TVCk=" class="sphinx-tabs-panel group-tab" hidden="true" id="panel-8-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>searxng-archlinux<span class="w"> </span><span class="se">\</span>
<span class="w"> </span>mv<span class="w"> </span>/usr/local/searxng/searxng-src<span class="w"> </span>/usr/local/searxng/searxng-src.old
$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>searxng-archlinux<span class="w"> </span><span class="se">\</span>
<span class="w"> </span>ln<span class="w"> </span>-s<span class="w"> </span>/share/SearXNG/<span class="w"> </span>/usr/local/searxng/searxng-src
</pre></div>
</div>
</div></div>
<p>Now we can develop as usual in the working tree of our desktop system. Every
time the software was changed, you have to restart the SearXNG service (in the
container):</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-9-dXdzZ2lAc2VhcnhuZw==" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-9-dXdzZ2lAc2VhcnhuZw==" name="dXdzZ2lAc2VhcnhuZw==" role="tab" tabindex="0"><a class="reference external" href="mailto:uwsgi&#37;&#52;&#48;searxng">uwsgi<span>&#64;</span>searxng</a></button></div><div aria-labelledby="tab-9-dXdzZ2lAc2VhcnhuZw==" class="sphinx-tabs-panel group-tab" id="panel-9-dXdzZ2lAc2VhcnhuZw==" name="dXdzZ2lAc2VhcnhuZw==" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>searxng-archlinux<span class="w"> </span>systemctl<span class="w"> </span>restart<span class="w"> </span>uwsgi@searxng
</pre></div>
</div>
</div></div>
<p>Remember: <a class="reference internal" href="#working-in-containers"><span class="std std-ref">In containers, work as usual</span></a> .. here are just some examples from my
daily usage:</p>
<p>To <em>inspect</em> the SearXNG instance (already described above):</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-10-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-10-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tab" tabindex="0"><code class="docutils literal notranslate"><span class="pre">[root&#64;searxng-archlinux</span> <span class="pre">SearXNG]</span></code> (GUEST)</button><button aria-controls="panel-10-ZGVza3RvcCAoSE9TVCk=" aria-selected="false" class="sphinx-tabs-tab group-tab" id="tab-10-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tab" tabindex="-1">desktop (HOST)</button></div><div aria-labelledby="tab-10-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" class="sphinx-tabs-panel group-tab" id="panel-10-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>./utils/searx.sh<span class="w"> </span>inspect<span class="w"> </span>service
</pre></div>
</div>
</div><div aria-labelledby="tab-10-ZGVza3RvcCAoSE9TVCk=" class="sphinx-tabs-panel group-tab" hidden="true" id="panel-10-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>searxng-archlinux<span class="w"> </span>./utils/searx.sh<span class="w"> </span>inspect<span class="w"> </span>service
</pre></div>
</div>
</div></div>
<p>Run <a class="reference internal" href="makefile.html#makefile"><span class="std std-ref">Makefile &amp; ./manage</span></a>, e.g. to test inside the container:</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-11-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-11-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tab" tabindex="0"><code class="docutils literal notranslate"><span class="pre">[root&#64;searxng-archlinux</span> <span class="pre">SearXNG]</span></code> (GUEST)</button><button aria-controls="panel-11-ZGVza3RvcCAoSE9TVCk=" aria-selected="false" class="sphinx-tabs-tab group-tab" id="tab-11-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tab" tabindex="-1">desktop (HOST)</button></div><div aria-labelledby="tab-11-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" class="sphinx-tabs-panel group-tab" id="panel-11-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>make<span class="w"> </span><span class="nb">test</span>
</pre></div>
</div>
</div><div aria-labelledby="tab-11-ZGVza3RvcCAoSE9TVCk=" class="sphinx-tabs-panel group-tab" hidden="true" id="panel-11-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>searxng-archlinux<span class="w"> </span>make<span class="w"> </span><span class="nb">test</span>
</pre></div>
</div>
</div></div>
<p>To install all prerequisites needed for a <a class="reference internal" href="../admin/buildhosts.html#buildhosts"><span class="std std-ref">Buildhosts</span></a>:</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-12-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-12-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tab" tabindex="0"><code class="docutils literal notranslate"><span class="pre">[root&#64;searxng-archlinux</span> <span class="pre">SearXNG]</span></code> (GUEST)</button><button aria-controls="panel-12-ZGVza3RvcCAoSE9TVCk=" aria-selected="false" class="sphinx-tabs-tab group-tab" id="tab-12-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tab" tabindex="-1">desktop (HOST)</button></div><div aria-labelledby="tab-12-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" class="sphinx-tabs-panel group-tab" id="panel-12-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>./utils/searxng.sh<span class="w"> </span>install<span class="w"> </span>buildhost
</pre></div>
</div>
</div><div aria-labelledby="tab-12-ZGVza3RvcCAoSE9TVCk=" class="sphinx-tabs-panel group-tab" hidden="true" id="panel-12-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>searxng-archlinux<span class="w"> </span>./utils/searxng.sh<span class="w"> </span>install<span class="w"> </span>buildhost
</pre></div>
</div>
</div></div>
<p>To build the docs on a buildhost <a class="reference internal" href="../admin/buildhosts.html#buildhosts"><span class="std std-ref">Buildhosts</span></a>:</p>
<div class="sphinx-tabs docutils container">
<div aria-label="Tabbed content" class="closeable" role="tablist"><button aria-controls="panel-13-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" aria-selected="true" class="sphinx-tabs-tab group-tab" id="tab-13-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tab" tabindex="0"><code class="docutils literal notranslate"><span class="pre">[root&#64;searxng-archlinux</span> <span class="pre">SearXNG]</span></code> (GUEST)</button><button aria-controls="panel-13-ZGVza3RvcCAoSE9TVCk=" aria-selected="false" class="sphinx-tabs-tab group-tab" id="tab-13-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tab" tabindex="-1">desktop (HOST)</button></div><div aria-labelledby="tab-13-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" class="sphinx-tabs-panel group-tab" id="panel-13-YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" name="YGBbcm9vdEBzZWFyeG5nLWFyY2hsaW51eCBTZWFyWE5HXWBgIChHVUVTVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>make<span class="w"> </span>docs.html
</pre></div>
</div>
</div><div aria-labelledby="tab-13-ZGVza3RvcCAoSE9TVCk=" class="sphinx-tabs-panel group-tab" hidden="true" id="panel-13-ZGVza3RvcCAoSE9TVCk=" name="ZGVza3RvcCAoSE9TVCk=" role="tabpanel" tabindex="0"><div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>searxng-archlinux<span class="w"> </span>make<span class="w"> </span>docs.html
</pre></div>
</div>
</div></div>
</section>
<section id="summary">
<span id="lxcdev-summary"></span><h2><a class="toc-backref" href="#id5" role="doc-backlink">Summary</a><a class="headerlink" href="#summary" title="Link to this heading"></a></h2>
<p>We build up a fully functional SearXNG suite in a archlinux container:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>build<span class="w"> </span>searxng-archlinux
$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>install<span class="w"> </span>suite<span class="w"> </span>searxng-archlinux
...
Developer<span class="w"> </span>install?<span class="w"> </span><span class="o">(</span>wraps<span class="w"> </span><span class="nb">source</span><span class="w"> </span>from<span class="w"> </span>HOST<span class="w"> </span>into<span class="w"> </span>the<span class="w"> </span>running<span class="w"> </span>instance<span class="o">)</span><span class="w"> </span><span class="o">[</span>YES/no<span class="o">]</span>
</pre></div>
</div>
<p>To wrap the suite into a developer one answer <code class="docutils literal notranslate"><span class="pre">YES</span></code> (or press Enter).</p>
<div class="highlight-text notranslate"><div class="highlight"><pre><span></span>link SearXNG&#39;s sources to: /share/SearXNG
=========================================
mv -f &quot;/usr/local/searxng/searxng-src&quot; &quot;/usr/local/searxng/searxng-src.backup&quot;
ln -s &quot;/share/SearXNG&quot; &quot;/usr/local/searxng/searxng-src&quot;
ls -ld /usr/local/searxng/searxng-src
|searxng| lrwxrwxrwx 1 searxng searxng ... /usr/local/searxng/searxng-src -&gt; /share/SearXNG
</pre></div>
</div>
<p>On code modification the instance has to be restarted (see <a class="reference internal" href="../admin/installation-uwsgi.html#uwsgi-maintenance"><span class="std std-ref">uWSGI maintenance</span></a>):</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>searxng-archlinux<span class="w"> </span>systemctl<span class="w"> </span>restart<span class="w"> </span>uwsgi@searxng
</pre></div>
</div>
<p>To access HTTP from the desktop we installed nginx for the services inside the
container:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>sudo<span class="w"> </span>-H<span class="w"> </span>./utils/lxc.sh<span class="w"> </span>cmd<span class="w"> </span>--<span class="w"> </span><span class="nv">FORCE_TIMEOUT</span><span class="o">=</span><span class="m">0</span><span class="w"> </span>./utils/searxng.sh<span class="w"> </span>install<span class="w"> </span>nginx
</pre></div>
</div>
<p>To get information about the SearxNG suite in the archlinux container we can
use:</p>
<div class="highlight-text notranslate"><div class="highlight"><pre><span></span>$ 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
</pre></div>
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