<!DOCTYPE html> <!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> <!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Introduction to Lorax — Lorax 28.14 documentation</title> <link rel="stylesheet" href="_static/css/theme.css" type="text/css" /> <link rel="stylesheet" href="_static/pygments.css" type="text/css" /> <link rel="index" title="Index" href="genindex.html" /> <link rel="search" title="Search" href="search.html" /> <link rel="next" title="Lorax" href="lorax.html" /> <link rel="prev" title="Welcome to Lorax’s documentation!" href="index.html" /> <script src="_static/js/modernizr.min.js"></script> </head> <body class="wy-body-for-nav"> <div class="wy-grid-for-nav"> <nav data-toggle="wy-nav-shift" class="wy-nav-side"> <div class="wy-side-scroll"> <div class="wy-side-nav-search"> <a href="index.html" class="icon icon-home"> Lorax </a> <div class="version"> 28.14 </div> <div role="search"> <form id="rtd-search-form" class="wy-form" action="search.html" method="get"> <input type="text" name="q" placeholder="Search docs" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> </div> <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation"> <ul class="current"> <li class="toctree-l1 current"><a class="current reference internal" href="#">Introduction to Lorax</a></li> <li class="toctree-l1"><a class="reference internal" href="#before-lorax">Before Lorax</a></li> <li class="toctree-l1"><a class="reference internal" href="lorax.html">Lorax</a></li> <li class="toctree-l1"><a class="reference internal" href="livemedia-creator.html">livemedia-creator</a></li> <li class="toctree-l1"><a class="reference internal" href="lorax-composer.html">lorax-composer</a></li> <li class="toctree-l1"><a class="reference internal" href="composer-cli.html">composer-cli</a></li> <li class="toctree-l1"><a class="reference internal" href="product-images.html">Product and Updates Images</a></li> <li class="toctree-l1"><a class="reference internal" href="modules.html">pylorax</a></li> </ul> </div> </div> </nav> <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> <nav class="wy-nav-top" aria-label="top navigation"> <i data-toggle="wy-nav-top" class="fa fa-bars"></i> <a href="index.html">Lorax</a> </nav> <div class="wy-nav-content"> <div class="rst-content"> <div role="navigation" aria-label="breadcrumbs navigation"> <ul class="wy-breadcrumbs"> <li><a href="index.html">Docs</a> »</li> <li>Introduction to Lorax</li> <li class="wy-breadcrumbs-aside"> <a href="_sources/intro.rst.txt" rel="nofollow"> View page source</a> </li> </ul> <hr/> </div> <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article"> <div itemprop="articleBody"> <div class="section" id="introduction-to-lorax"> <h1>Introduction to Lorax<a class="headerlink" href="#introduction-to-lorax" title="Permalink to this headline">¶</a></h1> <p>I am the Lorax. I speak for the trees [and images].</p> <p>Lorax is used to build the Anaconda Installer boot.iso, it consists of a library, pylorax, a set of templates, and the lorax script. Its operation is driven by a customized set of Mako templates that lists the packages to be installed, steps to execute to remove unneeded files, and creation of the iso for all of the supported architectures.</p> </div> <div class="section" id="before-lorax"> <h1>Before Lorax<a class="headerlink" href="#before-lorax" title="Permalink to this headline">¶</a></h1> <p>Tree building tools such as pungi and revisor rely on ‘buildinstall’ in anaconda/scripts/ to produce the boot images and other such control files in the final tree. The existing buildinstall scripts written in a mix of bash and Python are unmaintainable. Lorax is an attempt to replace them with something more flexible.</p> <p>EXISTING WORKFLOW:</p> <p>pungi and other tools call scripts/buildinstall, which in turn call other scripts to do the image building and data generation. Here’s how it currently looks:</p> <blockquote> <div><dl class="docutils"> <dt>-> buildinstall</dt> <dd><ul class="first simple"> <li>process command line options</li> <li>write temporary yum.conf to point to correct repo</li> <li>find anaconda release RPM</li> <li>unpack RPM, pull in those versions of upd-instroot, mk-images, maketreeinfo.py, makestamp.py, and buildinstall</li> </ul> <p>-> call upd-instroot</p> <p>-> call maketreeinfo.py</p> <p>-> call mk-images (which figures out which mk-images.ARCH to call)</p> <p>-> call makestamp.py</p> <ul class="last simple"> <li>clean up</li> </ul> </dd> </dl> </div></blockquote> <p>PROBLEMS:</p> <p>The existing workflow presents some problems with maintaining the scripts. First, almost all knowledge of what goes in to the stage 1 and stage 2 images lives in upd-instroot. The mk-images* scripts copy things from the root created by upd-instroot in order to build the stage 1 image, though it’s not completely clear from reading the scripts.</p> <p>NEW IDEAS:</p> <p>Create a new central driver with all information living in Python modules. Configuration files will provide the knowledge previously contained in the upd-instroot and mk-images* scripts.</p> </div> </div> </div> <footer> <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> <a href="lorax.html" class="btn btn-neutral float-right" title="Lorax" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right"></span></a> <a href="index.html" class="btn btn-neutral" title="Welcome to Lorax’s documentation!" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left"></span> Previous</a> </div> <hr/> <div role="contentinfo"> <p> © Copyright 2018, Red Hat, Inc.. </p> </div> Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/rtfd/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. </footer> </div> </div> </section> </div> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT:'./', VERSION:'28.14', LANGUAGE:'None', COLLAPSE_INDEX:false, FILE_SUFFIX:'.html', HAS_SOURCE: true, SOURCELINK_SUFFIX: '.txt' }; </script> <script type="text/javascript" src="_static/jquery.js"></script> <script type="text/javascript" src="_static/underscore.js"></script> <script type="text/javascript" src="_static/doctools.js"></script> <script type="text/javascript" src="_static/js/theme.js"></script> <script type="text/javascript"> jQuery(function () { SphinxRtdTheme.Navigation.enable(true); }); </script> </body> </html>