297 lines
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HTML
297 lines
9.7 KiB
HTML
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<title>27. Troubleshooting — cdist 4.8.2 documentation</title>
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<link rel="top" title="cdist 4.8.2 documentation" href="index.html"/>
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<a href="index.html" class="icon icon-home"> cdist
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<div class="version">
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4.8.2
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</div>
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<ul class="current">
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<li class="toctree-l1"><a class="reference internal" href="cdist-intro.html">1. cdist - usable configuration management</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-why.html">2. Why should I use cdist?</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-os.html">3. Supported Operating Systems</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-install.html">4. How to install cdist</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-update.html">5. How to update cdist</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-support.html">6. Support</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-features.html">7. Features</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-quickstart.html">8. Quickstart</a></li>
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<li class="toctree-l1"><a class="reference internal" href="man1/cdist.html">9. cdist(1)</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-bootstrap.html">10. Bootstrap</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-configuration.html">11. Configuration</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-manifest.html">12. Manifest</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-type.html">13. cdist type</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-types.html">14. cdist types</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-explorer.html">15. Explorer</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-messaging.html">16. Messaging</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-parallelization.html">17. Parallelization</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-inventory.html">18. Inventory</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-integration.html">19. cdist integration / using cdist as library</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-reference.html">20. Reference</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-best-practice.html">21. Best practice</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-stages.html">22. Execution stages</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-cache.html">23. Local cache overview</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-saving-output-streams.html">24. Saving output streams</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-remote-exec-copy.html">25. Remote exec and copy commands</a></li>
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<li class="toctree-l1"><a class="reference internal" href="cdist-hacker.html">26. Hacking</a></li>
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<li class="toctree-l1 current"><a class="current reference internal" href="#">27. Troubleshooting</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="#error-in-manifest-is-not-considered-an-error-by-cdist">27.1. Error in manifest is not considered an error by cdist</a></li>
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</ul>
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</li>
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</ul>
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</div>
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</nav>
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<li><a href="index.html">Docs</a> »</li>
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<li>27. Troubleshooting</li>
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<li class="wy-breadcrumbs-aside">
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<a href="_sources/cdist-troubleshooting.rst.txt" rel="nofollow"> View page source</a>
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<hr/>
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<div class="section" id="troubleshooting">
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<h1>27. Troubleshooting<a class="headerlink" href="#troubleshooting" title="Permalink to this headline">¶</a></h1>
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<div class="section" id="error-in-manifest-is-not-considered-an-error-by-cdist">
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<h2>27.1. 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>
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<p>Situation: You are executing other scripts from a manifest.
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This script fails, but cdist does not recognise the error.
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An example script would be something like this:</p>
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<div class="highlight-sh"><div class="highlight"><pre><span></span>% cat ~/.cdist/manifest/init
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<span class="s2">"</span><span class="nv">$__manifest</span><span class="s2">/special"</span>
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% cat ~/.cdist/manifest/special
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<span class="c1">#!/bin/sh</span>
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<span class="nb">echo</span> <span class="s2">"Here is an unclean exiting script"</span>
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somecommandthatdoesnotexist
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<span class="nb">echo</span> <span class="s2">"I continue here although previous command failed"</span>
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</pre></div>
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</div>
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<p>We can clearly see that <strong>somecommandthatdoesnotexist</strong>
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will fail in ~/.cdist/manifest/special. But as the custom
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script is not called with the -e flag (exit on failure) of shell,
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it does not lead to an error. And thus cdist sees the exit 0
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code of the last echo line instead of the failing command.</p>
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<p>All scripts executed by cdist carry the -e flag.
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To prevent the above from happening, there are three solutions available,
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two of which can be used in the calling script:</p>
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<div class="highlight-sh"><div class="highlight"><pre><span></span><span class="c1"># Execute as before, but abort on failure</span>
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sh -e <span class="s2">"</span><span class="nv">$__manifest</span><span class="s2">/special"</span>
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<span class="c1"># Source the script in our namespace, runs in a set -e environment:</span>
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. <span class="s2">"</span><span class="nv">$__manifest</span><span class="s2">/special"</span>
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</pre></div>
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</div>
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<p>The third solution is to include a shebang header in every script
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you write to use the -e flag:</p>
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<div class="highlight-sh"><div class="highlight"><pre><span></span>% cat ~/.cdist/manifest/special
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<span class="c1">#!/bin/sh -e</span>
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...
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</pre></div>
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<a href="cdist-hacker.html" class="btn btn-neutral" title="26. Hacking" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left"></span> Previous</a>
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