mirror of
https://github.com/ansible-collections/community.general.git
synced 2024-09-14 20:13:21 +02:00
276 lines
No EOL
10 KiB
HTML
276 lines
No EOL
10 KiB
HTML
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
|
|
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
|
|
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
|
|
<title>YAML Syntax — Ansible Documentation</title>
|
|
|
|
<link rel="stylesheet" href="_static/default.css" type="text/css" />
|
|
<link rel="stylesheet" href="_static/pygments.css" type="text/css" />
|
|
<link rel="stylesheet" href="_static/bootstrap.css" type="text/css" />
|
|
<link rel="stylesheet" href="_static/bootstrap-sphinx.css" type="text/css" />
|
|
|
|
<script type="text/javascript">
|
|
var DOCUMENTATION_OPTIONS = {
|
|
URL_ROOT: '',
|
|
VERSION: '0.01',
|
|
COLLAPSE_INDEX: false,
|
|
FILE_SUFFIX: '.html',
|
|
HAS_SOURCE: false
|
|
};
|
|
</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/bootstrap-dropdown.js"></script>
|
|
<script type="text/javascript" src="_static/bootstrap-scrollspy.js"></script>
|
|
<link rel="shortcut icon" href="_static/favicon.ico"/>
|
|
<link rel="top" title="Ansible Documentation" href="index.html" />
|
|
<link rel="next" title="Playbooks" href="playbooks.html" />
|
|
<link rel="prev" title="Ansible Modules" href="modules.html" />
|
|
<script type="text/javascript">
|
|
(function () {
|
|
/**
|
|
* Patch TOC list.
|
|
*
|
|
* Will mutate the underlying span to have a correct ul for nav.
|
|
*
|
|
* @param $span: Span containing nested UL's to mutate.
|
|
* @param minLevel: Starting level for nested lists. (1: global, 2: local).
|
|
*/
|
|
var patchToc = function ($span, minLevel) {
|
|
var $tocList = $("<ul/>").attr('class', "dropdown-menu"),
|
|
findA;
|
|
|
|
// Find all a "internal" tags, traversing recursively.
|
|
findA = function ($elem, level) {
|
|
var level = level || 0,
|
|
$items = $elem.find("> li > a.internal, > ul, > li > ul");
|
|
|
|
// Iterate everything in order.
|
|
$items.each(function (index, item) {
|
|
var $item = $(item),
|
|
tag = item.tagName.toLowerCase(),
|
|
pad = 10 + ((level - minLevel) * 10);
|
|
|
|
if (tag === 'a' && level >= minLevel) {
|
|
// Add to existing padding.
|
|
$item.css('padding-left', pad + "px");
|
|
// Add list element.
|
|
$tocList.append($("<li/>").append($item));
|
|
} else if (tag === 'ul') {
|
|
// Recurse.
|
|
findA($item, level + 1);
|
|
}
|
|
});
|
|
};
|
|
|
|
// Start construction and return.
|
|
findA($span);
|
|
|
|
// Wipe out old list and patch in new one.
|
|
return $span.empty("ul").append($tocList);
|
|
};
|
|
|
|
$(document).ready(function () {
|
|
// Patch the global and local TOC's to be bootstrap-compliant.
|
|
patchToc($("span.globaltoc"), 1);
|
|
patchToc($("span.localtoc"), 2);
|
|
|
|
// Activate.
|
|
$('#topbar').dropdown();
|
|
});
|
|
}());
|
|
</script>
|
|
|
|
<script type="text/javascript">
|
|
|
|
var _gaq = _gaq || [];
|
|
_gaq.push(['_setAccount', 'UA-29861888-1']);
|
|
_gaq.push(['_trackPageview']);
|
|
|
|
(function() {
|
|
var ga = document.createElement('script'); ga.type =
|
|
'text/javascript'; ga.async = true;
|
|
ga.src = ('https:' == document.location.protocol ? 'https://ssl' :
|
|
'http://www') + '.google-analytics.com/ga.js';
|
|
var s = document.getElementsByTagName('script')[0];
|
|
s.parentNode.insertBefore(ga, s);
|
|
})();
|
|
|
|
</script>
|
|
|
|
<script type="text/javascript">
|
|
(function() {
|
|
var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true;
|
|
po.src = 'https://apis.google.com/js/plusone.js';
|
|
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s);
|
|
})();
|
|
</script>
|
|
|
|
<script>(function(d, s, id) {
|
|
var js, fjs = d.getElementsByTagName(s)[0];
|
|
if (d.getElementById(id)) return;
|
|
js = d.createElement(s); js.id = id;
|
|
js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";
|
|
fjs.parentNode.insertBefore(js, fjs);
|
|
}(document, 'script', 'facebook-jssdk'));</script>
|
|
|
|
</head>
|
|
<body>
|
|
<div class="topbar" data-scrollspy="scrollspy" >
|
|
<div class="topbar-inner">
|
|
<div class="container">
|
|
<a class="brand" href="index.html">Ansible Documentation</a>
|
|
<ul class="nav">
|
|
|
|
<li><a href="/">Home</A>
|
|
<li class="dropdown" data-dropdown="dropdown">
|
|
<a href="index.html"
|
|
class="dropdown-toggle">Chapter</a>
|
|
<span class="globaltoc"><ul class="current">
|
|
<li class="toctree-l1"><a class="reference internal" href="gettingstarted.html">Getting Started</a></li>
|
|
<li class="toctree-l1"><a class="reference internal" href="patterns.html">Inventory & Patterns</a></li>
|
|
<li class="toctree-l1"><a class="reference internal" href="examples.html">Command Line Examples And Next Steps</a></li>
|
|
<li class="toctree-l1"><a class="reference internal" href="modules.html">Ansible Modules</a></li>
|
|
<li class="toctree-l1 current"><a class="current reference internal" href="">YAML Syntax</a></li>
|
|
<li class="toctree-l1"><a class="reference internal" href="playbooks.html">Playbooks</a></li>
|
|
<li class="toctree-l1"><a class="reference internal" href="playbooks2.html">Advanced Playbooks</a></li>
|
|
<li class="toctree-l1"><a class="reference internal" href="bestpractices.html">Best Practices</a></li>
|
|
<li class="toctree-l1"><a class="reference internal" href="api.html">API & Integrations</a></li>
|
|
<li class="toctree-l1"><a class="reference internal" href="moduledev.html">Module Development</a></li>
|
|
</ul>
|
|
</span>
|
|
</li>
|
|
<li class="dropdown" data-dropdown="dropdown">
|
|
<a href="#"
|
|
class="dropdown-toggle">Page</a>
|
|
<span class="localtoc"><ul>
|
|
<li><a class="reference internal" href="#">YAML Syntax</a><ul>
|
|
<li><a class="reference internal" href="#yaml-basics">YAML Basics</a></li>
|
|
</ul>
|
|
</li>
|
|
</ul>
|
|
</span>
|
|
</li>
|
|
|
|
</ul>
|
|
<ul class="nav secondary-nav">
|
|
|
|
|
|
<form class="pull-left" action="search.html" method="get">
|
|
<input type="text" name="q" placeholder="Search" />
|
|
<input type="hidden" name="check_keywords" value="yes" />
|
|
<input type="hidden" name="area" value="default" />
|
|
</form>
|
|
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|
|
|
|
<div class="container">
|
|
|
|
<div class="section" id="yaml-syntax">
|
|
<h1>YAML Syntax<a class="headerlink" href="#yaml-syntax" title="Permalink to this headline">¶</a></h1>
|
|
<p>This page provides a basic overview of correct YAML syntax, which is how Ansible
|
|
playbooks (our configuration management language) are expressed.</p>
|
|
<p>We use YAML because it is easier to read and write for humans than other common
|
|
data formats like XML or JSON. Further, there are libraries available for reading
|
|
and writing YAML in most programming languages.</p>
|
|
<p>You may also wish to read <a class="reference internal" href="playbooks.html"><em>Playbooks</em></a> at the same time to see how this
|
|
is used in practice.</p>
|
|
<div class="section" id="yaml-basics">
|
|
<h2>YAML Basics<a class="headerlink" href="#yaml-basics" title="Permalink to this headline">¶</a></h2>
|
|
<p>For <cite>ansible</cite>, nearly every YAML file starts with a list.
|
|
Each item in the list is a list of key/value pairs, commonly
|
|
called a “hash” or a “dictionary”. So, we need to know how
|
|
to write lists and dictionaries in YAML.</p>
|
|
<p>There’s another small quirk to YAML. All YAML files (regardless of their association with
|
|
<cite>ansible</cite> or not) should start with <tt class="docutils literal"><span class="pre">---</span></tt>. This is just a YAML
|
|
format thing that means “this is the start of a document”.</p>
|
|
<p>All members of a list are lines beginning at the same indentation level starting
|
|
with a <tt class="docutils literal"><span class="pre">-</span></tt> (dash) character:</p>
|
|
<div class="highlight-python"><pre>---
|
|
# A list of tasty fruits
|
|
- Apple
|
|
- Orange
|
|
- Strawberry
|
|
- Mango</pre>
|
|
</div>
|
|
<p>A dictionary is represented in a simple <tt class="docutils literal"><span class="pre">key:</span></tt> and <tt class="docutils literal"><span class="pre">value</span></tt> form:</p>
|
|
<div class="highlight-python"><pre>---
|
|
# An employee record
|
|
name: John Eckersberg
|
|
job: Developer
|
|
skill: Elite</pre>
|
|
</div>
|
|
<p>Dictionaries can also be represented in an abbreviated form if you really want to:</p>
|
|
<div class="highlight-python"><pre>---
|
|
# An employee record
|
|
{name: John Eckersberg, job: Developer, skill: Elite}</pre>
|
|
</div>
|
|
<p id="truthiness">Ansible doesn’t really use these too much, but you can also specify a
|
|
boolean value (true/false) in several forms:</p>
|
|
<div class="highlight-python"><pre>---
|
|
knows_oop: True
|
|
likes_emacs: TRUE
|
|
uses_cvs: false</pre>
|
|
</div>
|
|
<p>Let’s combine what we learned so far in an arbitary YAML example. This really
|
|
has nothing to do with Ansible, but will give you a feel for the format:</p>
|
|
<div class="highlight-python"><pre>---
|
|
# An employee record
|
|
name: John Eckersberg
|
|
job: Developer
|
|
skill: Elite
|
|
employed: True
|
|
foods:
|
|
- Apple
|
|
- Orange
|
|
- Strawberry
|
|
- Mango
|
|
languages:
|
|
ruby: Elite
|
|
python: Elite
|
|
dotnet: Lame</pre>
|
|
</div>
|
|
<p>That’s all you really need to know about YAML to get started writing
|
|
<cite>Ansible</cite> playbooks.</p>
|
|
<div class="admonition-see-also admonition seealso">
|
|
<p class="first admonition-title">See also</p>
|
|
<dl class="last docutils">
|
|
<dt><a class="reference internal" href="playbooks.html"><em>Playbooks</em></a></dt>
|
|
<dd>Learn what playbooks can do and how to write/run them.</dd>
|
|
<dt><a class="reference external" href="http://yamllint.com/">YAMLLint</a></dt>
|
|
<dd>YAML Lint (online) helps you debug YAML syntax if you are having problems</dd>
|
|
<dt><a class="reference external" href="https://github.com/ansible/ansible/tree/devel/examples/playbooks">Github examples directory</a></dt>
|
|
<dd>Complete playbook files from the github project source</dd>
|
|
<dt><a class="reference external" href="http://groups.google.com/group/ansible-project">Mailing List</a></dt>
|
|
<dd>Questions? Help? Ideas? Stop by the list on Google Groups</dd>
|
|
<dt><a class="reference external" href="http://irc.freenode.net">irc.freenode.net</a></dt>
|
|
<dd>#ansible IRC chat channel</dd>
|
|
</dl>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|
|
|
|
<br/>
|
|
</div>
|
|
<footer class="footer">
|
|
<div class="container">
|
|
<p>
|
|
<p>
|
|
© Copyright 2012 Michael DeHaan.<br/>
|
|
Last updated on Oct 04, 2012.<br/>
|
|
</p>
|
|
</div>
|
|
</footer>
|
|
</body>
|
|
</html> |