www.nico.schottelius.org/software/cdist/man/4.6.0/cdist-troubleshooting.html
2017-08-25 11:06:15 +02:00

293 lines
No EOL
9.3 KiB
HTML

<!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>23. Troubleshooting &mdash; cdist 4.6.0 documentation</title>
<link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
<link rel="index" title="Index"
href="genindex.html"/>
<link rel="search" title="Search" href="search.html"/>
<link rel="top" title="cdist 4.6.0 documentation" href="index.html"/>
<link rel="prev" title="22. Hacking" href="cdist-hacker.html"/>
<script src="_static/js/modernizr.min.js"></script>
</head>
<body class="wy-body-for-nav" role="document">
<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"> cdist
</a>
<div class="version">
4.6.0
</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"><a class="reference internal" href="cdist-intro.html">1. cdist - usable configuration management</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-why.html">2. Why should I use cdist?</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-os.html">3. Supported Operating Systems</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-install.html">4. How to install cdist</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-update.html">5. How to update cdist</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-support.html">6. Support</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-features.html">7. Features</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-quickstart.html">8. Quickstart</a></li>
<li class="toctree-l1"><a class="reference internal" href="man1/cdist.html">9. cdist(1)</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-bootstrap.html">10. Bootstrap</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-manifest.html">11. Manifest</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-type.html">12. cdist type</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-types.html">13. cdist types</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-explorer.html">14. Explorer</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-messaging.html">15. Messaging</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-parallelization.html">16. Parallelization</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-inventory.html">17. Inventory</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-reference.html">18. Reference</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-best-practice.html">19. Best practice</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-stages.html">20. Execution stages</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-remote-exec-copy.html">21. Remote exec and copy commands</a></li>
<li class="toctree-l1"><a class="reference internal" href="cdist-hacker.html">22. Hacking</a></li>
<li class="toctree-l1 current"><a class="current reference internal" href="#">23. Troubleshooting</a><ul>
<li class="toctree-l2"><a class="reference internal" href="#error-in-manifest-is-not-considered-an-error-by-cdist">23.1. Error in manifest is not considered an error by cdist</a></li>
</ul>
</li>
</ul>
</div>
</div>
</nav>
<section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
<nav class="wy-nav-top" role="navigation" aria-label="top navigation">
<i data-toggle="wy-nav-top" class="fa fa-bars"></i>
<a href="index.html">cdist</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> &raquo;</li>
<li>23. Troubleshooting</li>
<li class="wy-breadcrumbs-aside">
<a href="_sources/cdist-troubleshooting.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="troubleshooting">
<h1>23. Troubleshooting<a class="headerlink" href="#troubleshooting" title="Permalink to this headline"></a></h1>
<div class="section" id="error-in-manifest-is-not-considered-an-error-by-cdist">
<h2>23.1. Error in manifest is not considered an error by cdist<a class="headerlink" href="#error-in-manifest-is-not-considered-an-error-by-cdist" title="Permalink to this headline"></a></h2>
<p>Situation: You are executing other scripts from a manifest.
This script fails, but cdist does not recognise the error.
An example script would be something like this:</p>
<div class="highlight-sh"><div class="highlight"><pre><span></span>% cat ~/.cdist/manifest/init
<span class="s2">&quot;</span><span class="nv">$__manifest</span><span class="s2">/special&quot;</span>
% cat ~/.cdist/manifest/special
<span class="c1">#!/bin/sh</span>
<span class="nb">echo</span> <span class="s2">&quot;Here is an unclean exiting script&quot;</span>
somecommandthatdoesnotexist
<span class="nb">echo</span> <span class="s2">&quot;I continue here although previous command failed&quot;</span>
</pre></div>
</div>
<p>We can clearly see that <strong>somecommandthatdoesnotexist</strong>
will fail in ~/.cdist/manifest/special. But as the custom
script is not called with the -e flag (exit on failure) of shell,
it does not lead to an error. And thus cdist sees the exit 0
code of the last echo line instead of the failing command.</p>
<p>All scripts executed by cdist carry the -e flag.
To prevent the above from happening, there are three solutions available,
two of which can be used in the calling script:</p>
<div class="highlight-sh"><div class="highlight"><pre><span></span><span class="c1"># Execute as before, but abort on failure</span>
sh -e <span class="s2">&quot;</span><span class="nv">$__manifest</span><span class="s2">/special&quot;</span>
<span class="c1"># Source the script in our namespace, runs in a set -e environment:</span>
. <span class="s2">&quot;</span><span class="nv">$__manifest</span><span class="s2">/special&quot;</span>
</pre></div>
</div>
<p>The third solution is to include a shebang header in every script
you write to use the -e flag:</p>
<div class="highlight-sh"><div class="highlight"><pre><span></span>% cat ~/.cdist/manifest/special
<span class="c1">#!/bin/sh -e</span>
...
</pre></div>
</div>
</div>
</div>
</div>
<div class="articleComments">
</div>
</div>
<footer>
<div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
<a href="cdist-hacker.html" class="btn btn-neutral" title="22. Hacking" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left"></span> Previous</a>
</div>
<hr/>
<div role="contentinfo">
<p>
&copy; Copyright .
</p>
</div>
Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/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:'4.6.0',
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.StickyNav.enable();
});
</script>
</body>
</html>