713 lines
18 KiB
HTML
713 lines
18 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
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<head>
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<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" />
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<meta name="generator" content="AsciiDoc 8.6.4" />
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<title>cdist-stages(7)</title>
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h1, h2, h3, h4, h5, h6,
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/////////////////////////////////////////////////////////////////////
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// Footnotes generator
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/////////////////////////////////////////////////////////////////////
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/* Based on footnote generation code from:
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* http://www.brandspankingnew.net/archive/2005/07/format_footnote.html
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*/
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/*]]>*/
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</script>
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</head>
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<body class="article">
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<div id="header">
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<h1>cdist-stages(7)</h1>
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<span id="author">Nico Schottelius</span><br />
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<span id="email"><tt><<a href="mailto:nico-cdist--@--schottelius.org">nico-cdist--@--schottelius.org</a>></tt></span><br />
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</div>
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<div id="content">
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<div class="sect1">
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<h2 id="_name">NAME</h2>
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<div class="sectionbody">
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<div class="paragraph"><p>cdist-stages - Stages used during configuration deployment</p></div>
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</div>
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</div>
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<div class="sect1">
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<h2 id="_description">DESCRIPTION</h2>
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<div class="sectionbody">
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<div class="paragraph"><p>Starting the execution of deployment with cdist-deploy-to(1), cdist passes
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through different stages, each can be triggered and debugged on its own.
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Reading the source of the cdist-deploy-to executable shous the scripts
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responsible for each stage.</p></div>
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</div>
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</div>
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<div class="sect1">
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<h2 id="_stage_0_internal_preperation">STAGE 0: INTERNAL PREPERATION</h2>
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<div class="sectionbody">
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<div class="paragraph"><p>Before running the user facing stages, cdist prepares the target host
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to contain cdist binaries and creates a clean environment for the
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configuration run.</p></div>
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<div class="paragraph"><p>Related manpages:
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- cdist-bin-transfer(1)</p></div>
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</div>
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</div>
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<div class="sect1">
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<h2 id="_stage_1_target_information_retrieval">STAGE 1: TARGET INFORMATION RETRIEVAL</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>In this stage information is collected about the target host using so called
|
|
explorers. Every existing explorer is run on the target and the output of all
|
|
explorers are copied back into the local cache. The results can be used by
|
|
manifests and types.</p></div>
|
|
<div class="paragraph"><p>Related manpages:
|
|
- cdist-explorer(7)</p></div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="_stage_2_run_the_initial_manifest">STAGE 2: RUN THE INITIAL MANIFEST</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>The initial manifest, which should be used for mappings of hosts to types,
|
|
is executed. This stage creates objects in a cconfig database that contains
|
|
the objects as defined in the manifest for the specific host. In this stage,
|
|
no conflicts may occur, i.e. no object of the same type with the same id may
|
|
be created.</p></div>
|
|
<div class="paragraph"><p>Related manpages:
|
|
- cdist-manifest(7)
|
|
- cdist-manifest-run(1)
|
|
- cdist-manifest-run-init(1)</p></div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="_stage_3_execution_of_types">STAGE 3: EXECUTION OF TYPES</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>Every object is checked whether its type has a manifest file. If the type has
|
|
a manifest file and it is executable, it will be executed. The manifest script
|
|
may generate and change the created objects. In other words, one type can reuse
|
|
other types.</p></div>
|
|
<div class="paragraph"><p>For instance the object <em>apache/www.test.ch is of type </em>apache, which may
|
|
contain a manifest script, which creates new objects of type __file.</p></div>
|
|
<div class="paragraph"><p>The newly created objects are merged back into the existing tree. No conflicts
|
|
may occur during the merge. A conflict would mean that two different objects
|
|
try to create the same object, which indicates a broken configuration.</p></div>
|
|
<div class="paragraph"><p>Related manpages:
|
|
- cdist-manifest-run(1)
|
|
- cdist-manifest-run-all(1)
|
|
- cdist-type(7)</p></div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="_stage_4_code_generation">STAGE 4: CODE GENERATION</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>In this stage for every created objects its type is checked whether it has a
|
|
gencode script. If the type has a gencode script and it is executable it will
|
|
be executed. This executable should create code to be executed on the target
|
|
on stdout. If the gencode executable fails, it must print diagnostic messages
|
|
on stderr and exit non-zero.</p></div>
|
|
<div class="paragraph"><p>Related manpages:
|
|
- cdist-gencode(1)
|
|
- cdist-gencode-all(1)
|
|
- cdist-type(7)</p></div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="_stage_5_code_execution">STAGE 5: CODE EXECUTION</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>The resulting code from the previous stage is transferred to the target host
|
|
and executed there to apply the configuration changes,</p></div>
|
|
<div class="paragraph"><p>Related manpages:
|
|
- cdist-exec-run(1)
|
|
- cdist-exec-transfer(1)</p></div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="_summary">SUMMARY</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>If, and only if, all the stages complete without an errors, the configuration
|
|
will be applied to the target. Each stage can also be run individually, though
|
|
dependencies for each stage must be fulfilled and thus the stages must be run
|
|
in correct order.</p></div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="_see_also">SEE ALSO</h2>
|
|
<div class="sectionbody">
|
|
<div class="ulist"><ul>
|
|
<li>
|
|
<p>
|
|
cdist(7)
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
cdist-deploy-to(1)
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
cdist-reference(7)
|
|
</p>
|
|
</li>
|
|
</ul></div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="_copying">COPYING</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>Copyright (C) 2010-2011 Nico Schottelius. Free use of this software is
|
|
granted under the terms of the GNU General Public License version 3 (GPLv3).</p></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div id="footnotes"><hr /></div>
|
|
<div id="footer">
|
|
<div id="footer-text">
|
|
Last updated 2011-03-12 19:10:39 CET
|
|
</div>
|
|
</div>
|
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</body>
|
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</html>
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