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<a href="index.html" class="icon icon-home"> Lorax
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34.0
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<div class="section" id="lorax-composer">
<h1>lorax-composer<a class="headerlink" href="#lorax-composer" title="Permalink to this headline"></a></h1>
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<dl class="field-list simple">
<dt class="field-odd">Authors</dt>
<dd class="field-odd"><p>Brian C. Lane &lt;<a class="reference external" href="mailto:bcl&#37;&#52;&#48;redhat&#46;com">bcl<span>&#64;</span>redhat<span>&#46;</span>com</a>&gt;</p>
</dd>
</dl>
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<p><code class="docutils literal notranslate"><span class="pre">lorax-composer</span></code> is a WELDR API server that allows you to build disk images using
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<a class="reference internal" href="#blueprints">Blueprints</a> to describe the package versions to be installed into the image.
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It is compatible with the Weldr project's bdcs-api REST protocol. More
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information on Weldr can be found <a class="reference external" href="http://www.weldr.io">on the Weldr blog</a>.</p>
<p>Behind the scenes it uses <a class="reference external" href="livemedia-creator.html">livemedia-creator</a> and
<a class="reference external" href="https://anaconda-installer.readthedocs.io/en/latest/">Anaconda</a> to handle the
installation and configuration of the images.</p>
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<div class="admonition note">
<p class="admonition-title">Note</p>
<p><code class="docutils literal notranslate"><span class="pre">lorax-composer</span></code> is now deprecated. It is being replaced by the
<code class="docutils literal notranslate"><span class="pre">osbuild-composer</span></code> WELDR API server which implements more features (eg.
ostree, image uploads, etc.) You can still use <code class="docutils literal notranslate"><span class="pre">composer-cli</span></code> and
<code class="docutils literal notranslate"><span class="pre">cockpit-composer</span></code> with <code class="docutils literal notranslate"><span class="pre">osbuild-composer</span></code>. See the documentation or
the <a class="reference external" href="https://www.osbuild.org/">osbuild website</a> for more information.</p>
</div>
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<div class="section" id="important-things-to-note">
<h2>Important Things To Note<a class="headerlink" href="#important-things-to-note" title="Permalink to this headline"></a></h2>
<ul class="simple">
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<li><p>As of version 30.7 SELinux can be set to Enforcing. The current state is
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logged for debugging purposes and if there are SELinux denials they should
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be reported as a bug.</p></li>
<li><p>All image types lock the root account, except for live-iso. You will need to either
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use one of the <a class="reference internal" href="#customizations">Customizations</a> methods for setting a ssh key/password, install a
package that creates a user, or use something like <cite>cloud-init</cite> to setup access at
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boot time.</p></li>
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</ul>
</div>
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<div class="section" id="installation">
<h2>Installation<a class="headerlink" href="#installation" title="Permalink to this headline"></a></h2>
<p>The best way to install <code class="docutils literal notranslate"><span class="pre">lorax-composer</span></code> is to use <code class="docutils literal notranslate"><span class="pre">sudo</span> <span class="pre">dnf</span> <span class="pre">install</span>
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<span class="pre">lorax-composer</span> <span class="pre">composer-cli</span></code>, this will setup the weldr user and install the
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systemd socket activation service. You will then need to enable it with <code class="docutils literal notranslate"><span class="pre">sudo</span>
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<span class="pre">systemctl</span> <span class="pre">enable</span> <span class="pre">lorax-composer.socket</span> <span class="pre">&amp;&amp;</span> <span class="pre">sudo</span> <span class="pre">systemctl</span> <span class="pre">start</span>
<span class="pre">lorax-composer.socket</span></code>. This will leave the server off until the first request
is made. Systemd will then launch the server and it will remain running until
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the system is rebooted. This will cause some delay in responding to the first
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request from the UI or <cite>composer-cli</cite>.</p>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
<p>If you want lorax-composer to respond immediately to the first request you can
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start and enable <cite>lorax-composer.service</cite> instead of <cite>lorax-composer.socket</cite></p>
</div>
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</div>
<div class="section" id="quickstart">
<h2>Quickstart<a class="headerlink" href="#quickstart" title="Permalink to this headline"></a></h2>
<ol class="arabic simple">
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<li><p>Create a <code class="docutils literal notranslate"><span class="pre">weldr</span></code> user and group by running <code class="docutils literal notranslate"><span class="pre">useradd</span> <span class="pre">weldr</span></code></p></li>
<li><p>Remove any pre-existing socket directory with <code class="docutils literal notranslate"><span class="pre">rm</span> <span class="pre">-rf</span> <span class="pre">/run/weldr/</span></code>
A new directory with correct permissions will be created the first time the server runs.</p></li>
<li><p>Enable the socket activation with <code class="docutils literal notranslate"><span class="pre">systemctl</span> <span class="pre">enable</span> <span class="pre">lorax-composer.socket</span>
<span class="pre">&amp;&amp;</span> <span class="pre">sudo</span> <span class="pre">systemctl</span> <span class="pre">start</span> <span class="pre">lorax-composer.socket</span></code>.</p></li>
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</ol>
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<p>NOTE: You can also run it directly with <code class="docutils literal notranslate"><span class="pre">lorax-composer</span> <span class="pre">/path/to/blueprints</span></code>. However,
<code class="docutils literal notranslate"><span class="pre">lorax-composer</span></code> does not react well to being started both on the command line and via
socket activation at the same time. It is therefore recommended that you run it directly
on the command line only for testing or development purposes. For real use or development
of other projects that simply use the API, you should stick to socket activation only.</p>
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<p>The <code class="docutils literal notranslate"><span class="pre">/path/to/blueprints/</span></code> directory is where the blueprints' git repo will
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be created, and all the blueprints created with the <code class="docutils literal notranslate"><span class="pre">/api/v0/blueprints/new</span></code>
route will be stored. If there are blueprint <code class="docutils literal notranslate"><span class="pre">.toml</span></code> files in the top level
of the directory they will be imported into the blueprint git storage when
<code class="docutils literal notranslate"><span class="pre">lorax-composer</span></code> starts.</p>
</div>
<div class="section" id="logs">
<h2>Logs<a class="headerlink" href="#logs" title="Permalink to this headline"></a></h2>
<p>Logs are stored under <code class="docutils literal notranslate"><span class="pre">/var/log/lorax-composer/</span></code> and include all console
messages as well as extra debugging info and API requests.</p>
</div>
<div class="section" id="security">
<h2>Security<a class="headerlink" href="#security" title="Permalink to this headline"></a></h2>
<p>Some security related issues that you should be aware of before running <code class="docutils literal notranslate"><span class="pre">lorax-composer</span></code>:</p>
<ul class="simple">
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<li><p>One of the API server threads needs to retain root privileges in order to run Anaconda.</p></li>
<li><p>Only allow authorized users access to the <code class="docutils literal notranslate"><span class="pre">weldr</span></code> group and socket.</p></li>
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</ul>
<p>Since Anaconda kickstarts are used there is the possibility that a user could
inject commands into a blueprint that would result in the kickstart executing
arbitrary code on the host. Only authorized users should be allowed to build
images using <code class="docutils literal notranslate"><span class="pre">lorax-composer</span></code>.</p>
</div>
<div class="section" id="lorax-composer-cmdline-arguments">
<h2>lorax-composer cmdline arguments<a class="headerlink" href="#lorax-composer-cmdline-arguments" title="Permalink to this headline"></a></h2>
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<p><p>Lorax Composer API Server</p>
</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">usage</span><span class="p">:</span> <span class="n">lorax</span><span class="o">-</span><span class="n">composer</span> <span class="p">[</span><span class="o">-</span><span class="n">h</span><span class="p">]</span> <span class="p">[</span><span class="o">--</span><span class="n">socket</span> <span class="n">SOCKET</span><span class="p">]</span> <span class="p">[</span><span class="o">--</span><span class="n">user</span> <span class="n">USER</span><span class="p">]</span> <span class="p">[</span><span class="o">--</span><span class="n">group</span> <span class="n">GROUP</span><span class="p">]</span> <span class="p">[</span><span class="o">--</span><span class="n">log</span> <span class="n">LOG</span><span class="p">]</span> <span class="p">[</span><span class="o">--</span><span class="n">mockfiles</span> <span class="n">MOCKFILES</span><span class="p">]</span> <span class="p">[</span><span class="o">--</span><span class="n">sharedir</span> <span class="n">SHAREDIR</span><span class="p">]</span> <span class="p">[</span><span class="o">-</span><span class="n">V</span><span class="p">]</span> <span class="p">[</span><span class="o">-</span><span class="n">c</span> <span class="n">CONFIG</span><span class="p">]</span> <span class="p">[</span><span class="o">--</span><span class="n">releasever</span> <span class="n">STRING</span><span class="p">]</span> <span class="p">[</span><span class="o">--</span><span class="n">tmp</span> <span class="n">TMP</span><span class="p">]</span> <span class="p">[</span><span class="o">--</span><span class="n">proxy</span> <span class="n">PROXY</span><span class="p">]</span> <span class="p">[</span><span class="o">--</span><span class="n">no</span><span class="o">-</span><span class="n">system</span><span class="o">-</span><span class="n">repos</span><span class="p">]</span> <span class="n">BLUEPRINTS</span>
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</pre></div>
</div>
<div class="section" id="Positional Arguments">
<h3>Positional Arguments<a class="headerlink" href="#Positional Arguments" title="Permalink to this headline"></a></h3>
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<dl class="option-list">
<dt><kbd>BLUEPRINTS</kbd></dt>
<dd><p>Path to the blueprints</p>
</dd>
</dl>
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</div>
<div class="section" id="Named Arguments">
<h3>Named Arguments<a class="headerlink" href="#Named Arguments" title="Permalink to this headline"></a></h3>
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<dl class="option-list">
<dt><kbd>--socket</kbd></dt>
<dd><p>Path to the socket file to listen on</p>
<p>Default: &quot;/run/weldr/api.socket&quot;</p>
</dd>
<dt><kbd>--user</kbd></dt>
<dd><p>User to use for reduced permissions</p>
<p>Default: &quot;root&quot;</p>
</dd>
<dt><kbd>--group</kbd></dt>
<dd><p>Group to set ownership of the socket to</p>
<p>Default: &quot;weldr&quot;</p>
</dd>
<dt><kbd>--log</kbd></dt>
<dd><p>Path to logfile (/var/log/lorax-composer/composer.log)</p>
<p>Default: &quot;/var/log/lorax-composer/composer.log&quot;</p>
</dd>
<dt><kbd>--mockfiles</kbd></dt>
<dd><p>Path to JSON files used for /api/mock/ paths (/var/tmp/bdcs-mockfiles/)</p>
<p>Default: &quot;/var/tmp/bdcs-mockfiles/&quot;</p>
</dd>
<dt><kbd>--sharedir</kbd></dt>
<dd><p>Directory containing all the templates. Overrides config file sharedir</p>
</dd>
<dt><kbd>-V</kbd></dt>
<dd><p>show program's version number and exit</p>
<p>Default: False</p>
</dd>
<dt><kbd>-c, --config</kbd></dt>
<dd><p>Path to lorax-composer configuration file.</p>
<p>Default: &quot;/etc/lorax/composer.conf&quot;</p>
</dd>
<dt><kbd>--releasever</kbd></dt>
<dd><p>Release version to use for $releasever in dnf repository urls</p>
</dd>
<dt><kbd>--tmp</kbd></dt>
<dd><p>Top level temporary directory</p>
<p>Default: &quot;/var/tmp&quot;</p>
</dd>
<dt><kbd>--proxy</kbd></dt>
<dd><p>Set proxy for DNF, overrides configuration file setting.</p>
</dd>
<dt><kbd>--no-system-repos</kbd></dt>
<dd><p>Do not copy over system repos from /etc/yum.repos.d/ at startup</p>
<p>Default: False</p>
</dd>
</dl>
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</div>
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</div>
<div class="section" id="how-it-works">
<h2>How it Works<a class="headerlink" href="#how-it-works" title="Permalink to this headline"></a></h2>
<p>The server runs as root, and as <code class="docutils literal notranslate"><span class="pre">weldr</span></code>. Communication with it is via a unix
domain socket (<code class="docutils literal notranslate"><span class="pre">/run/weldr/api.socket</span></code> by default). The directory and socket
are owned by <code class="docutils literal notranslate"><span class="pre">root:weldr</span></code> so that any user in the <code class="docutils literal notranslate"><span class="pre">weldr</span></code> group can use the API
to control <code class="docutils literal notranslate"><span class="pre">lorax-composer</span></code>.</p>
<p>At startup the server will check for the correct permissions and
ownership of a pre-existing directory, or it will create a new one if it
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doesn't exist. The socket path and group owner's name can be changed from the
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cmdline by passing it the <code class="docutils literal notranslate"><span class="pre">--socket</span></code> and <code class="docutils literal notranslate"><span class="pre">--group</span></code> arguments.</p>
<p>It will then drop root privileges for the API thread and run as the <code class="docutils literal notranslate"><span class="pre">weldr</span></code>
user. The queue and compose thread still runs as root because it needs to be
able to mount/umount files and run Anaconda.</p>
</div>
<div class="section" id="composing-images">
<h2>Composing Images<a class="headerlink" href="#composing-images" title="Permalink to this headline"></a></h2>
<p>The <a class="reference external" href="https://github.com/weldr/welder-web/">welder-web</a> GUI project can be used to construct
blueprints and create composes using a web browser.</p>
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<p>Or use the command line with <a class="reference external" href="composer-cli.html">composer-cli</a>.</p>
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</div>
<div class="section" id="blueprints">
<h2>Blueprints<a class="headerlink" href="#blueprints" title="Permalink to this headline"></a></h2>
<p>Blueprints are simple text files in <a class="reference external" href="https://github.com/toml-lang/toml">TOML</a> format that describe
which packages, and what versions, to install into the image. They can also define a limited set
of customizations to make to the final image.</p>
<p>Example blueprints can be found in the <code class="docutils literal notranslate"><span class="pre">lorax-composer</span></code> <a class="reference external" href="https://github.com/weldr/lorax/tree/master/tests/pylorax/blueprints/">test suite</a>, with a simple one
looking like this:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">name</span> <span class="o">=</span> <span class="s2">&quot;base&quot;</span>
<span class="n">description</span> <span class="o">=</span> <span class="s2">&quot;A base system with bash&quot;</span>
<span class="n">version</span> <span class="o">=</span> <span class="s2">&quot;0.0.1&quot;</span>
<span class="p">[[</span><span class="n">packages</span><span class="p">]]</span>
<span class="n">name</span> <span class="o">=</span> <span class="s2">&quot;bash&quot;</span>
<span class="n">version</span> <span class="o">=</span> <span class="s2">&quot;4.4.*&quot;</span>
</pre></div>
</div>
<p>The <code class="docutils literal notranslate"><span class="pre">name</span></code> field is the name of the blueprint. It can contain spaces, but they will be converted to <code class="docutils literal notranslate"><span class="pre">-</span></code>
when it is written to disk. It should be short and descriptive.</p>
<p><code class="docutils literal notranslate"><span class="pre">description</span></code> can be a longer description of the blueprint, it is only used for display purposes.</p>
<p><code class="docutils literal notranslate"><span class="pre">version</span></code> is a <a class="reference external" href="https://semver.org/">semver compatible</a> version number. If
a new blueprint is uploaded with the same <code class="docutils literal notranslate"><span class="pre">version</span></code> the server will
automatically bump the PATCH level of the <code class="docutils literal notranslate"><span class="pre">version</span></code>. If the <code class="docutils literal notranslate"><span class="pre">version</span></code>
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doesn't match it will be used as is. eg. Uploading a blueprint with <code class="docutils literal notranslate"><span class="pre">version</span></code>
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set to <code class="docutils literal notranslate"><span class="pre">0.1.0</span></code> when the existing blueprint <code class="docutils literal notranslate"><span class="pre">version</span></code> is <code class="docutils literal notranslate"><span class="pre">0.0.1</span></code> will
result in the new blueprint being stored as <code class="docutils literal notranslate"><span class="pre">version</span> <span class="pre">0.1.0</span></code>.</p>
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<div class="section" id="packages-and-modules">
<h3>[[packages]] and [[modules]]<a class="headerlink" href="#packages-and-modules" title="Permalink to this headline"></a></h3>
<p>These entries describe the package names and matching version glob to be installed into the image.</p>
<p>The names must match the names exactly, and the versions can be an exact match
or a filesystem-like glob of the version using <code class="docutils literal notranslate"><span class="pre">*</span></code> wildcards and <code class="docutils literal notranslate"><span class="pre">?</span></code>
character matching.</p>
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<p>NOTE: Currently there are no differences between <code class="docutils literal notranslate"><span class="pre">packages</span></code> and <code class="docutils literal notranslate"><span class="pre">modules</span></code>
in <code class="docutils literal notranslate"><span class="pre">lorax-composer</span></code>. Both are treated like an rpm package dependency.</p>
<p>For example, to install <code class="docutils literal notranslate"><span class="pre">tmux-2.9a</span></code> and <code class="docutils literal notranslate"><span class="pre">openssh-server-8.*</span></code>, you would add
this to your blueprint:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[[</span><span class="n">packages</span><span class="p">]]</span>
<span class="n">name</span> <span class="o">=</span> <span class="s2">&quot;tmux&quot;</span>
<span class="n">version</span> <span class="o">=</span> <span class="s2">&quot;2.9a&quot;</span>
<span class="p">[[</span><span class="n">packages</span><span class="p">]]</span>
<span class="n">name</span> <span class="o">=</span> <span class="s2">&quot;openssh-server&quot;</span>
<span class="n">version</span> <span class="o">=</span> <span class="s2">&quot;8.*&quot;</span>
</pre></div>
</div>
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</div>
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<div class="section" id="groups">
<h3>[[groups]]<a class="headerlink" href="#groups" title="Permalink to this headline"></a></h3>
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<p>The <code class="docutils literal notranslate"><span class="pre">groups</span></code> entries describe a group of packages to be installed into the image. Package groups are
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defined in the repository metadata. Each group has a descriptive name used primarily for display
in user interfaces and an ID more commonly used in kickstart files. Here, the ID is the expected
way of listing a group.</p>
<p>Groups have three different ways of categorizing their packages: mandatory, default, and optional.
For purposes of blueprints, mandatory and default packages will be installed. There is no mechanism
for selecting optional packages.</p>
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<p>For example, if you want to install the <code class="docutils literal notranslate"><span class="pre">anaconda-tools</span></code> group you would add this to your
blueprint:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[[</span><span class="n">groups</span><span class="p">]]</span>
<span class="n">name</span><span class="o">=</span><span class="s2">&quot;anaconda-tools&quot;</span>
</pre></div>
</div>
<p><code class="docutils literal notranslate"><span class="pre">groups</span></code> is a TOML list, so each group needs to be listed separately, like <code class="docutils literal notranslate"><span class="pre">packages</span></code> but with
no version number.</p>
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</div>
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<div class="section" id="customizations">
<h3>Customizations<a class="headerlink" href="#customizations" title="Permalink to this headline"></a></h3>
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<p>The <code class="docutils literal notranslate"><span class="pre">[customizations]</span></code> section can be used to configure the hostname of the final image. eg.:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[</span><span class="n">customizations</span><span class="p">]</span>
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<span class="n">hostname</span> <span class="o">=</span> <span class="s2">&quot;baseimage&quot;</span>
</pre></div>
</div>
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<p>This is optional and may be left out to use the defaults.</p>
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<div class="section" id="customizations-kernel">
<h4>[customizations.kernel]<a class="headerlink" href="#customizations-kernel" title="Permalink to this headline"></a></h4>
<p>This allows you to append arguments to the bootloader's kernel commandline. This will not have any
effect on <code class="docutils literal notranslate"><span class="pre">tar</span></code> or <code class="docutils literal notranslate"><span class="pre">ext4-filesystem</span></code> images since they do not include a bootloader.</p>
<p>For example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[</span><span class="n">customizations</span><span class="o">.</span><span class="n">kernel</span><span class="p">]</span>
<span class="n">append</span> <span class="o">=</span> <span class="s2">&quot;nosmt=force&quot;</span>
</pre></div>
</div>
</div>
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<div class="section" id="customizations-sshkey">
<h4>[[customizations.sshkey]]<a class="headerlink" href="#customizations-sshkey" title="Permalink to this headline"></a></h4>
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<p>Set an existing user's ssh key in the final image:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[[</span><span class="n">customizations</span><span class="o">.</span><span class="n">sshkey</span><span class="p">]]</span>
<span class="n">user</span> <span class="o">=</span> <span class="s2">&quot;root&quot;</span>
<span class="n">key</span> <span class="o">=</span> <span class="s2">&quot;PUBLIC SSH KEY&quot;</span>
</pre></div>
</div>
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<p>The key will be added to the user's authorized_keys file.</p>
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<div class="admonition warning">
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<p class="admonition-title">Warning</p>
<p><code class="docutils literal notranslate"><span class="pre">key</span></code> expects the entire content of <code class="docutils literal notranslate"><span class="pre">~/.ssh/id_rsa.pub</span></code></p>
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</div>
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</div>
<div class="section" id="customizations-user">
<h4>[[customizations.user]]<a class="headerlink" href="#customizations-user" title="Permalink to this headline"></a></h4>
<p>Add a user to the image, and/or set their ssh key.
All fields for this section are optional except for the <code class="docutils literal notranslate"><span class="pre">name</span></code>, here is a complete example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[[</span><span class="n">customizations</span><span class="o">.</span><span class="n">user</span><span class="p">]]</span>
<span class="n">name</span> <span class="o">=</span> <span class="s2">&quot;admin&quot;</span>
<span class="n">description</span> <span class="o">=</span> <span class="s2">&quot;Administrator account&quot;</span>
<span class="n">password</span> <span class="o">=</span> <span class="s2">&quot;$6$CHO2$3rN8eviE2t50lmVyBYihTgVRHcaecmeCk31L...&quot;</span>
<span class="n">key</span> <span class="o">=</span> <span class="s2">&quot;PUBLIC SSH KEY&quot;</span>
<span class="n">home</span> <span class="o">=</span> <span class="s2">&quot;/srv/widget/&quot;</span>
<span class="n">shell</span> <span class="o">=</span> <span class="s2">&quot;/usr/bin/bash&quot;</span>
<span class="n">groups</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;widget&quot;</span><span class="p">,</span> <span class="s2">&quot;users&quot;</span><span class="p">,</span> <span class="s2">&quot;wheel&quot;</span><span class="p">]</span>
<span class="n">uid</span> <span class="o">=</span> <span class="mi">1200</span>
<span class="n">gid</span> <span class="o">=</span> <span class="mi">1200</span>
</pre></div>
</div>
<p>If the password starts with <code class="docutils literal notranslate"><span class="pre">$6$</span></code>, <code class="docutils literal notranslate"><span class="pre">$5$</span></code>, or <code class="docutils literal notranslate"><span class="pre">$2b$</span></code> it will be stored as
an encrypted password. Otherwise it will be treated as a plain text password.</p>
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<div class="admonition warning">
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<p class="admonition-title">Warning</p>
<p><code class="docutils literal notranslate"><span class="pre">key</span></code> expects the entire content of <code class="docutils literal notranslate"><span class="pre">~/.ssh/id_rsa.pub</span></code></p>
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</div>
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</div>
<div class="section" id="customizations-group">
<h4>[[customizations.group]]<a class="headerlink" href="#customizations-group" title="Permalink to this headline"></a></h4>
<p>Add a group to the image. <code class="docutils literal notranslate"><span class="pre">name</span></code> is required and <code class="docutils literal notranslate"><span class="pre">gid</span></code> is optional:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[[</span><span class="n">customizations</span><span class="o">.</span><span class="n">group</span><span class="p">]]</span>
<span class="n">name</span> <span class="o">=</span> <span class="s2">&quot;widget&quot;</span>
<span class="n">gid</span> <span class="o">=</span> <span class="mi">1130</span>
</pre></div>
</div>
</div>
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<div class="section" id="customizations-timezone">
<h4>[customizations.timezone]<a class="headerlink" href="#customizations-timezone" title="Permalink to this headline"></a></h4>
<p>Customizing the timezone and the NTP servers to use for the system:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[</span><span class="n">customizations</span><span class="o">.</span><span class="n">timezone</span><span class="p">]</span>
<span class="n">timezone</span> <span class="o">=</span> <span class="s2">&quot;US/Eastern&quot;</span>
<span class="n">ntpservers</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;0.north-america.pool.ntp.org&quot;</span><span class="p">,</span> <span class="s2">&quot;1.north-america.pool.ntp.org&quot;</span><span class="p">]</span>
</pre></div>
</div>
<p>The values supported by <code class="docutils literal notranslate"><span class="pre">timezone</span></code> can be listed by running <code class="docutils literal notranslate"><span class="pre">timedatectl</span> <span class="pre">list-timezones</span></code>.</p>
<p>If no timezone is setup the system will default to using <cite>UTC</cite>. The ntp servers are also
optional and will default to using the distribution defaults which are fine for most uses.</p>
<p>In some image types there are already NTP servers setup, eg. Google cloud image, and they
cannot be overridden because they are required to boot in the selected environment. But the
timezone will be updated to the one selected in the blueprint.</p>
</div>
<div class="section" id="customizations-locale">
<h4>[customizations.locale]<a class="headerlink" href="#customizations-locale" title="Permalink to this headline"></a></h4>
<p>Customize the locale settings for the system:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[</span><span class="n">customizations</span><span class="o">.</span><span class="n">locale</span><span class="p">]</span>
<span class="n">languages</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;en_US.UTF-8&quot;</span><span class="p">]</span>
<span class="n">keyboard</span> <span class="o">=</span> <span class="s2">&quot;us&quot;</span>
</pre></div>
</div>
<p>The values supported by <code class="docutils literal notranslate"><span class="pre">languages</span></code> can be listed by running <code class="docutils literal notranslate"><span class="pre">localectl</span> <span class="pre">list-locales</span></code> from
the command line.</p>
<p>The values supported by <code class="docutils literal notranslate"><span class="pre">keyboard</span></code> can be listed by running <code class="docutils literal notranslate"><span class="pre">localectl</span> <span class="pre">list-keymaps</span></code> from
the command line.</p>
<p>Multiple languages can be added. The first one becomes the
primary, and the others are added as secondary. One or the other of <code class="docutils literal notranslate"><span class="pre">languages</span></code>
or <code class="docutils literal notranslate"><span class="pre">keyboard</span></code> must be included (or both) in the section.</p>
</div>
<div class="section" id="customizations-firewall">
<h4>[customizations.firewall]<a class="headerlink" href="#customizations-firewall" title="Permalink to this headline"></a></h4>
<p>By default the firewall blocks all access except for services that enable their ports explicitly,
like <code class="docutils literal notranslate"><span class="pre">sshd</span></code>. This command can be used to open other ports or services. Ports are configured using
the port:protocol format:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[</span><span class="n">customizations</span><span class="o">.</span><span class="n">firewall</span><span class="p">]</span>
<span class="n">ports</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;22:tcp&quot;</span><span class="p">,</span> <span class="s2">&quot;80:tcp&quot;</span><span class="p">,</span> <span class="s2">&quot;imap:tcp&quot;</span><span class="p">,</span> <span class="s2">&quot;53:tcp&quot;</span><span class="p">,</span> <span class="s2">&quot;53:udp&quot;</span><span class="p">]</span>
</pre></div>
</div>
<p>Numeric ports, or their names from <code class="docutils literal notranslate"><span class="pre">/etc/services</span></code> can be used in the <code class="docutils literal notranslate"><span class="pre">ports</span></code> enabled/disabled lists.</p>
<p>The blueprint settings extend any existing settings in the image templates, so if <code class="docutils literal notranslate"><span class="pre">sshd</span></code> is
already enabled it will extend the list of ports with the ones listed by the blueprint.</p>
<p>If the distribution uses <code class="docutils literal notranslate"><span class="pre">firewalld</span></code> you can specify services listed by <code class="docutils literal notranslate"><span class="pre">firewall-cmd</span> <span class="pre">--get-services</span></code>
in a <code class="docutils literal notranslate"><span class="pre">customizations.firewall.services</span></code> section:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[</span><span class="n">customizations</span><span class="o">.</span><span class="n">firewall</span><span class="o">.</span><span class="n">services</span><span class="p">]</span>
<span class="n">enabled</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;ftp&quot;</span><span class="p">,</span> <span class="s2">&quot;ntp&quot;</span><span class="p">,</span> <span class="s2">&quot;dhcp&quot;</span><span class="p">]</span>
<span class="n">disabled</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;telnet&quot;</span><span class="p">]</span>
</pre></div>
</div>
<p>Remember that the <code class="docutils literal notranslate"><span class="pre">firewall.services</span></code> are different from the names in <code class="docutils literal notranslate"><span class="pre">/etc/services</span></code>.</p>
<p>Both are optional, if they are not used leave them out or set them to an empty list <code class="docutils literal notranslate"><span class="pre">[]</span></code>. If you
only want the default firewall setup this section can be omitted from the blueprint.</p>
<p>NOTE: The <code class="docutils literal notranslate"><span class="pre">Google</span></code> and <code class="docutils literal notranslate"><span class="pre">OpenStack</span></code> templates explicitly disable the firewall for their environment.
This cannot be overridden by the blueprint.</p>
</div>
<div class="section" id="customizations-services">
<h4>[customizations.services]<a class="headerlink" href="#customizations-services" title="Permalink to this headline"></a></h4>
<p>This section can be used to control which services are enabled at boot time.
Some image types already have services enabled or disabled in order for the
image to work correctly, and cannot be overridden. eg. <code class="docutils literal notranslate"><span class="pre">ami</span></code> requires
<code class="docutils literal notranslate"><span class="pre">sshd</span></code>, <code class="docutils literal notranslate"><span class="pre">chronyd</span></code>, and <code class="docutils literal notranslate"><span class="pre">cloud-init</span></code>. Without them the image will not
boot. Blueprint services are added to, not replacing, the list already in the
templates, if any.</p>
<p>The service names are systemd service units. You may specify any systemd unit
file accepted by <code class="docutils literal notranslate"><span class="pre">systemctl</span> <span class="pre">enable</span></code> eg. <code class="docutils literal notranslate"><span class="pre">cockpit.socket</span></code>:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[</span><span class="n">customizations</span><span class="o">.</span><span class="n">services</span><span class="p">]</span>
<span class="n">enabled</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;sshd&quot;</span><span class="p">,</span> <span class="s2">&quot;cockpit.socket&quot;</span><span class="p">,</span> <span class="s2">&quot;httpd&quot;</span><span class="p">]</span>
<span class="n">disabled</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;postfix&quot;</span><span class="p">,</span> <span class="s2">&quot;telnetd&quot;</span><span class="p">]</span>
</pre></div>
</div>
</div>
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</div>
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<div class="section" id="repos-git">
<h3>[[repos.git]]<a class="headerlink" href="#repos-git" title="Permalink to this headline"></a></h3>
2019-07-29 22:17:38 +00:00
<p>The <code class="docutils literal notranslate"><span class="pre">[[repos.git]]</span></code> entries are used to add files from a <a class="reference external" href="https://git-scm.com/">git repository</a>
2019-03-27 23:44:14 +00:00
repository to the created image. The repository is cloned, the specified <code class="docutils literal notranslate"><span class="pre">ref</span></code> is checked out
and an rpm is created to install the files to a <code class="docutils literal notranslate"><span class="pre">destination</span></code> path. The rpm includes a summary
with the details of the repository and reference used to create it. The rpm is also included in the
image build metadata.</p>
<p>To create an rpm named <code class="docutils literal notranslate"><span class="pre">server-config-1.0-1.noarch.rpm</span></code> you would add this to your blueprint:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[[</span><span class="n">repos</span><span class="o">.</span><span class="n">git</span><span class="p">]]</span>
<span class="n">rpmname</span><span class="o">=</span><span class="s2">&quot;server-config&quot;</span>
<span class="n">rpmversion</span><span class="o">=</span><span class="s2">&quot;1.0&quot;</span>
<span class="n">rpmrelease</span><span class="o">=</span><span class="s2">&quot;1&quot;</span>
<span class="n">summary</span><span class="o">=</span><span class="s2">&quot;Setup files for server deployment&quot;</span>
<span class="n">repo</span><span class="o">=</span><span class="s2">&quot;PATH OF GIT REPO TO CLONE&quot;</span>
<span class="n">ref</span><span class="o">=</span><span class="s2">&quot;v1.0&quot;</span>
<span class="n">destination</span><span class="o">=</span><span class="s2">&quot;/opt/server/&quot;</span>
</pre></div>
</div>
<ul class="simple">
<li><p>rpmname: Name of the rpm to create, also used as the prefix name in the tar archive</p></li>
<li><p>rpmversion: Version of the rpm, eg. &quot;1.0.0&quot;</p></li>
<li><p>rpmrelease: Release of the rpm, eg. &quot;1&quot;</p></li>
<li><p>summary: Summary string for the rpm</p></li>
<li><p>repo: URL of the get repo to clone and create the archive from</p></li>
<li><p>ref: Git reference to check out. eg. origin/branch-name, git tag, or git commit hash</p></li>
<li><p>destination: Path to install the / of the git repo at when installing the rpm</p></li>
</ul>
<p>An rpm will be created with the contents of the git repository referenced, with the files
being installed under <code class="docutils literal notranslate"><span class="pre">/opt/server/</span></code> in this case.</p>
<p><code class="docutils literal notranslate"><span class="pre">ref</span></code> can be any valid git reference for use with <code class="docutils literal notranslate"><span class="pre">git</span> <span class="pre">archive</span></code>. eg. to use the head
of a branch set it to <code class="docutils literal notranslate"><span class="pre">origin/branch-name</span></code>, a tag name, or a commit hash.</p>
<p>Note that the repository is cloned in full each time a build is started, so pointing to a
repository with a large amount of history may take a while to clone and use a significant
amount of disk space. The clone is temporary and is removed once the rpm is created.</p>
</div>
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</div>
<div class="section" id="adding-output-types">
<h2>Adding Output Types<a class="headerlink" href="#adding-output-types" title="Permalink to this headline"></a></h2>
<p><code class="docutils literal notranslate"><span class="pre">livemedia-creator</span></code> supports a large number of output types, and only some of
these are currently available via <code class="docutils literal notranslate"><span class="pre">lorax-composer</span></code>. To add a new output type to
lorax-composer a kickstart file needs to be added to <code class="docutils literal notranslate"><span class="pre">./share/composer/</span></code>. The
name of the kickstart is what will be used by the <code class="docutils literal notranslate"><span class="pre">/compose/types</span></code> route, and the
<code class="docutils literal notranslate"><span class="pre">compose_type</span></code> field of the POST to start a compose. It also needs to have
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code added to the <a class="reference internal" href="pylorax.api.html#pylorax.api.compose.compose_args" title="pylorax.api.compose.compose_args"><code class="xref py py-func docutils literal notranslate"><span class="pre">pylorax.api.compose.compose_args()</span></code></a> function. The
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<code class="docutils literal notranslate"><span class="pre">_MAP</span></code> entry in this function defines what lorax-composer will pass to
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<a class="reference internal" href="pylorax.html#pylorax.installer.novirt_install" title="pylorax.installer.novirt_install"><code class="xref py py-func docutils literal notranslate"><span class="pre">pylorax.installer.novirt_install()</span></code></a> when it runs the compose. When the
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compose is finished the output files need to be copied out of the build
directory (<code class="docutils literal notranslate"><span class="pre">/var/lib/lorax/composer/results/&lt;UUID&gt;/compose/</span></code>),
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<a class="reference internal" href="pylorax.api.html#pylorax.api.compose.move_compose_results" title="pylorax.api.compose.move_compose_results"><code class="xref py py-func docutils literal notranslate"><span class="pre">pylorax.api.compose.move_compose_results()</span></code></a> handles this for each type.
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You should move them instead of copying to save space.</p>
<p>If the new output type does not have support in livemedia-creator it should be
added there first. This will make the output available to the widest number of
users.</p>
<div class="section" id="example-add-partitioned-disk-support">
<h3>Example: Add partitioned disk support<a class="headerlink" href="#example-add-partitioned-disk-support" title="Permalink to this headline"></a></h3>
<p>Partitioned disk support is something that livemedia-creator already supports
via the <code class="docutils literal notranslate"><span class="pre">--make-disk</span></code> cmdline argument. To add this to lorax-composer it
needs 3 things:</p>
<ul class="simple">
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<li><p>A <code class="docutils literal notranslate"><span class="pre">partitioned-disk.ks</span></code> file in <code class="docutils literal notranslate"><span class="pre">./share/composer/</span></code></p></li>
<li><p>A new entry in the _MAP in <a class="reference internal" href="pylorax.api.html#pylorax.api.compose.compose_args" title="pylorax.api.compose.compose_args"><code class="xref py py-func docutils literal notranslate"><span class="pre">pylorax.api.compose.compose_args()</span></code></a></p></li>
<li><p>Add a bit of code to <a class="reference internal" href="pylorax.api.html#pylorax.api.compose.move_compose_results" title="pylorax.api.compose.move_compose_results"><code class="xref py py-func docutils literal notranslate"><span class="pre">pylorax.api.compose.move_compose_results()</span></code></a> to move the disk image from
the compose directory to the results directory.</p></li>
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</ul>
<p>The <code class="docutils literal notranslate"><span class="pre">partitioned-disk.ks</span></code> is pretty similar to the example minimal kickstart
in <code class="docutils literal notranslate"><span class="pre">./docs/fedora-minimal.ks</span></code>. You should remove the <code class="docutils literal notranslate"><span class="pre">url</span></code> and <code class="docutils literal notranslate"><span class="pre">repo</span></code>
commands, they will be added by the compose process. Make sure the bootloader
packages are included in the <code class="docutils literal notranslate"><span class="pre">%packages</span></code> section at the end of the kickstart,
and you will want to leave off the <code class="docutils literal notranslate"><span class="pre">%end</span></code> so that the compose can append the
list of packages from the blueprint.</p>
<p>The new <code class="docutils literal notranslate"><span class="pre">_MAP</span></code> entry should be a copy of one of the existing entries, but with <code class="docutils literal notranslate"><span class="pre">make_disk</span></code> set
to <code class="docutils literal notranslate"><span class="pre">True</span></code>. Make sure that none of the other <code class="docutils literal notranslate"><span class="pre">make_*</span></code> options are <code class="docutils literal notranslate"><span class="pre">True</span></code>. The <code class="docutils literal notranslate"><span class="pre">image_name</span></code> is
what the name of the final image will be.</p>
<p><code class="docutils literal notranslate"><span class="pre">move_compose_results()</span></code> can be as simple as moving the output file into
the results directory, or it could do some post-processing on it. The end of
the function should always clean up the <code class="docutils literal notranslate"><span class="pre">./compose/</span></code> directory, removing any
unneeded extra files. This is especially true for the <code class="docutils literal notranslate"><span class="pre">live-iso</span></code> since it produces
the contents of the iso as well as the boot.iso itself.</p>
</div>
</div>
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<div class="section" id="package-sources">
<h2>Package Sources<a class="headerlink" href="#package-sources" title="Permalink to this headline"></a></h2>
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<p>By default lorax-composer uses the host's configured repositories. It copies
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the <code class="docutils literal notranslate"><span class="pre">*.repo</span></code> files from <code class="docutils literal notranslate"><span class="pre">/etc/yum.repos.d/</span></code> into
<code class="docutils literal notranslate"><span class="pre">/var/lib/lorax/composer/repos.d/</span></code> at startup, these are immutable system
repositories and cannot be deleted or changed. If you want to add additional
repos you can put them into <code class="docutils literal notranslate"><span class="pre">/var/lib/lorax/composer/repos.d/</span></code> or use the
<code class="docutils literal notranslate"><span class="pre">/api/v0/projects/source/*</span></code> API routes to create them.</p>
<p>The new source can be added by doing a POST to the <code class="docutils literal notranslate"><span class="pre">/api/v0/projects/source/new</span></code>
route using JSON (with <cite>Content-Type</cite> header set to <cite>application/json</cite>) or TOML
(with it set to <cite>text/x-toml</cite>). The format of the source looks like this (in
TOML):</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">name</span> <span class="o">=</span> <span class="s2">&quot;custom-source-1&quot;</span>
<span class="n">url</span> <span class="o">=</span> <span class="s2">&quot;https://url/path/to/repository/&quot;</span>
<span class="nb">type</span> <span class="o">=</span> <span class="s2">&quot;yum-baseurl&quot;</span>
<span class="n">proxy</span> <span class="o">=</span> <span class="s2">&quot;https://proxy-url/&quot;</span>
<span class="n">check_ssl</span> <span class="o">=</span> <span class="n">true</span>
<span class="n">check_gpg</span> <span class="o">=</span> <span class="n">true</span>
<span class="n">gpgkey_urls</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;https://url/path/to/gpg-key&quot;</span><span class="p">]</span>
</pre></div>
</div>
<p>The <code class="docutils literal notranslate"><span class="pre">proxy</span></code> and <code class="docutils literal notranslate"><span class="pre">gpgkey_urls</span></code> entries are optional. All of the others are required. The supported
types for the urls are:</p>
<ul class="simple">
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<li><p><code class="docutils literal notranslate"><span class="pre">yum-baseurl</span></code> is a URL to a yum repository.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">yum-mirrorlist</span></code> is a URL for a mirrorlist.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">yum-metalink</span></code> is a URL for a metalink.</p></li>
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</ul>
<p>If <code class="docutils literal notranslate"><span class="pre">check_ssl</span></code> is true the https certificates must be valid. If they are self-signed you can either set
this to false, or add your Certificate Authority to the host system.</p>
<p>If <code class="docutils literal notranslate"><span class="pre">check_gpg</span></code> is true the GPG key must either be installed on the host system, or <code class="docutils literal notranslate"><span class="pre">gpgkey_urls</span></code>
should point to it.</p>
<p>You can edit an existing source (other than system sources), by doing a POST to the <code class="docutils literal notranslate"><span class="pre">new</span></code> route
with the new version of the source. It will overwrite the previous one.</p>
<p>A list of existing sources is available from <code class="docutils literal notranslate"><span class="pre">/api/v0/projects/source/list</span></code>, and detailed info
on a source can be retrieved with the <code class="docutils literal notranslate"><span class="pre">/api/v0/projects/source/info/&lt;source-name&gt;</span></code> route. By default
it returns JSON but it can also return TOML if <code class="docutils literal notranslate"><span class="pre">?format=toml</span></code> is added to the request.</p>
<p>Non-system sources can be deleted by doing a <code class="docutils literal notranslate"><span class="pre">DELETE</span></code> request to the
<code class="docutils literal notranslate"><span class="pre">/api/v0/projects/source/delete/&lt;source-name&gt;</span></code> route.</p>
<p>The documentation for the source API routes can be <a class="reference external" href="pylorax.api.html#api-v0-projects-source-list">found here</a></p>
<p>The configured sources are used for all blueprint depsolve operations, and for composing images.
When adding additional sources you must make sure that the packages in the source do not
conflict with any other package sources, otherwise depsolving will fail.</p>
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<div class="section" id="dvd-iso-package-source">
<h3>DVD ISO Package Source<a class="headerlink" href="#dvd-iso-package-source" title="Permalink to this headline"></a></h3>
<p>In some situations the system may want to <em>only</em> use a DVD iso as the package
source, not the repos from the network. <code class="docutils literal notranslate"><span class="pre">lorax-composer</span></code> and <code class="docutils literal notranslate"><span class="pre">anaconda</span></code>
understand <code class="docutils literal notranslate"><span class="pre">file://</span></code> URLs so you can mount an iso on the host, and replace the
system repo files with a configuration file pointing to the DVD.</p>
<ul>
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<li><p>Stop the <code class="docutils literal notranslate"><span class="pre">lorax-composer.service</span></code> if it is running</p></li>
<li><p>Move the repo files in <code class="docutils literal notranslate"><span class="pre">/etc/yum.repos.d/</span></code> someplace safe</p></li>
<li><p>Create a new <code class="docutils literal notranslate"><span class="pre">iso.repo</span></code> file in <code class="docutils literal notranslate"><span class="pre">/etc/yum.repos.d/</span></code>:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[</span><span class="n">iso</span><span class="p">]</span>
<span class="n">name</span><span class="o">=</span><span class="n">iso</span>
<span class="n">baseurl</span><span class="o">=</span><span class="n">file</span><span class="p">:</span><span class="o">///</span><span class="n">mnt</span><span class="o">/</span><span class="n">iso</span><span class="o">/</span>
<span class="n">enabled</span><span class="o">=</span><span class="mi">1</span>
<span class="n">gpgcheck</span><span class="o">=</span><span class="mi">1</span>
<span class="n">gpgkey</span><span class="o">=</span><span class="n">file</span><span class="p">:</span><span class="o">///</span><span class="n">mnt</span><span class="o">/</span><span class="n">iso</span><span class="o">/</span><span class="n">RPM</span><span class="o">-</span><span class="n">GPG</span><span class="o">-</span><span class="n">KEY</span><span class="o">-</span><span class="n">redhat</span><span class="o">-</span><span class="n">release</span>
</pre></div>
</div>
</li>
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<li><p>Remove all the cached repo files from <code class="docutils literal notranslate"><span class="pre">/var/lib/lorax/composer/repos/</span></code></p></li>
<li><p>Restart the <code class="docutils literal notranslate"><span class="pre">lorax-composer.service</span></code></p></li>
<li><p>Check the output of <code class="docutils literal notranslate"><span class="pre">composer-cli</span> <span class="pre">status</span> <span class="pre">show</span></code> for any output specific depsolve errors.
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For example, the DVD usually does not include <code class="docutils literal notranslate"><span class="pre">grub2-efi-*-cdboot-*</span></code> so the live-iso image
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type will not be available.</p></li>
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</ul>
<p>If you want to <em>add</em> the DVD source to the existing sources you can do that by
mounting the iso and creating a source file to point to it as described in the
<a class="reference internal" href="#package-sources">Package Sources</a> documentation. In that case there is no need to remove the other
sources from <code class="docutils literal notranslate"><span class="pre">/etc/yum.repos.d/</span></code> or clear the cached repos.</p>
</div>
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