Add missing files
This commit is contained in:
Michael DeHaan
parent
a631c21e5a
commit
10d197d77f
2 changed files with 350 additions and 0 deletions
324
html/faq.html
Normal file
324
html/faq.html
Normal file
|
|
@ -0,0 +1,324 @@
|
|||
|
||||
<!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>Frequently Asked Questions — Ansible v0.0.1 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: '0.0.1',
|
||||
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="top" title="Ansible v0.0.1 documentation" href="index.html" />
|
||||
<link rel="next" title="Man Pages" href="man.html" />
|
||||
<link rel="prev" title="Using the Python API" href="api.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>
|
||||
|
||||
</head>
|
||||
<body>
|
||||
<div class="topbar" data-scrollspy="scrollspy" >
|
||||
<div class="topbar-inner">
|
||||
<div class="container">
|
||||
<a class="brand" href="index.html">Ansible</a>
|
||||
<ul class="nav">
|
||||
|
||||
<li class="dropdown" data-dropdown="dropdown">
|
||||
<a href="index.html"
|
||||
class="dropdown-toggle">Site</a>
|
||||
<span class="globaltoc"><ul class="current">
|
||||
<li class="toctree-l1"><a class="reference internal" href="gettingstarted.html">Downloads & Getting Started</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="patterns.html">The Inventory File, Patterns, and Groups</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="examples.html">Command Line Examples</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="modules.html">Ansible Modules</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="YAMLScripts.html">YAML Format</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="api.html">Using the Python API</a></li>
|
||||
<li class="toctree-l1 current"><a class="current reference internal" href="">Frequently Asked Questions</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="man.html">Man Pages</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="#">Frequently Asked Questions</a><ul>
|
||||
<li><a class="reference internal" href="#what-inspired-ansible">What inspired Ansible?</a></li>
|
||||
<li><a class="reference internal" href="#comparisons">Comparisons</a><ul>
|
||||
<li><a class="reference internal" href="#vs-func">vs Func?</a></li>
|
||||
<li><a class="reference internal" href="#vs-puppet">vs Puppet?</a></li>
|
||||
<li><a class="reference internal" href="#vs-chef">vs Chef?</a></li>
|
||||
<li><a class="reference internal" href="#vs-capistrano-fabric">vs Capistrano/Fabric?</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
<li><a class="reference internal" href="#other-questions">Other Questions</a><ul>
|
||||
<li><a class="reference internal" href="#how-does-ansible-scale">How does Ansible scale?</a></li>
|
||||
<li><a class="reference internal" href="#are-transports-other-than-ssh-supported">Are transports other than SSH supported?</a></li>
|
||||
<li><a class="reference internal" href="#what-are-some-ideal-uses-for-ansible">What are some ideal uses for Ansible?</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
</span>
|
||||
</li>
|
||||
|
||||
|
||||
|
||||
<li><a href="api.html"
|
||||
title="previous chapter">« Using the Python API</a></li>
|
||||
<li><a href="man.html"
|
||||
title="next chapter">Man Pages »</a></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="frequently-asked-questions">
|
||||
<h1>Frequently Asked Questions<a class="headerlink" href="#frequently-asked-questions" title="Permalink to this headline">¶</a></h1>
|
||||
<div class="section" id="what-inspired-ansible">
|
||||
<h2>What inspired Ansible?<a class="headerlink" href="#what-inspired-ansible" title="Permalink to this headline">¶</a></h2>
|
||||
<p>Back when I worked for Red Hat and working on <a class="reference external" href="http://cobbler.github.com/">Cobbler</a>, several of us identified a gap between
|
||||
provisioning (Cobbler) and configuration management solutions (cfengine, Puppet, etc).
|
||||
There was a need for a way to do ad-hoc tasks efficiently, and various parallel
|
||||
SSH scripts were not API based enough for us. So we (Adrian Likins, Seth Vidal, and I)
|
||||
created <a class="reference external" href="http://fedorahosted.org/func">Func</a> – a secure distributed command framework.</p>
|
||||
<p>I always wanted to have a configuration management system built on Func, but never
|
||||
built it due to needing to spend time on Cobbler and other projects.
|
||||
In the meantime, a John Eckersberg developed Taboot,
|
||||
a deployment framework of sorts that sat on top of Func, using a YAML syntax very
|
||||
much like what Ansible now has in <a class="reference internal" href="playbooks.html"><em>Playbooks</em></a>.</p>
|
||||
<p>After trying to get Func running again recently at a new company, I got tired
|
||||
of some SSL and DNS issues and decided to create something a bit simpler, taking
|
||||
all of the good ideas from Func, and merging them with experience I learned from
|
||||
working at Puppet Labs. I wanted something that was easy to pick up and was installable
|
||||
without any bootstrapping, and didn’t suffer from the “I don’t want to learn X” mentality
|
||||
that often impacted adoption of tools like Puppet and Chef among certain ops teams.</p>
|
||||
<p>I also spent some time working with a couple of sites that needed to do large webapp deployments,
|
||||
and noticed how complex various configuration management and deployment tools were to these
|
||||
companies, compared with what they actually needed. Release processes were too complex
|
||||
and needed something simple to straighten them out – but I really didn’t want to train
|
||||
all the dev(ops) on Puppet or Chef, and they really didn’t want to learn them either.</p>
|
||||
<p>I kept thinking, is there a reason for these programs to be so large and complicated?
|
||||
Well, systems management is a little complicated, but no. Not really.</p>
|
||||
<p>Can I build something that a sysadmin can
|
||||
figure out in 15 minutes and get going, and then extend in any language he knows?
|
||||
That’s how Ansible was born. It sheds ‘best practices’ for ‘you know your infrastructure
|
||||
best’, and distills all of the ideas behind all of these other tools to the core.</p>
|
||||
<p>Not only is Ansible very simple and easy to learn/extend, it’s configuration management, deployment, and ad-hoc tasks all in one app. And I think that makes it pretty powerful. It hasn’t really been done before.</p>
|
||||
<p>I’d like to know what you think of it. Hop by the mailing list and say hi.</p>
|
||||
</div>
|
||||
<div class="section" id="comparisons">
|
||||
<h2>Comparisons<a class="headerlink" href="#comparisons" title="Permalink to this headline">¶</a></h2>
|
||||
<div class="section" id="vs-func">
|
||||
<h3>vs Func?<a class="headerlink" href="#vs-func" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Ansible uses SSH by default instead of SSL and custom daemons, and requires
|
||||
no extra software to run on managed machines. You can also write modules
|
||||
in any language as long as they return JSON. Ansible’s API, of course, is
|
||||
heavily inspired by Func. Some features, like delegation hierarchies, are
|
||||
not supported, but Ansible does have an async mode. Ansible also adds
|
||||
a configuration management and multinode orchestration layer (<a class="reference internal" href="playbooks.html"><em>Playbooks</em></a>)
|
||||
that Func didn’t have.</p>
|
||||
</div>
|
||||
<div class="section" id="vs-puppet">
|
||||
<h3>vs Puppet?<a class="headerlink" href="#vs-puppet" title="Permalink to this headline">¶</a></h3>
|
||||
<p>First off, Ansible wouldn’t have happened without Puppet. Puppet took configuration
|
||||
management ideas from cfengine and made them sane. However, I still think they can
|
||||
be simpler.</p>
|
||||
<p>Ansible playbooks ARE a complete configuration management system. Unlike Puppet, playbooks
|
||||
are implicitly ordered (more like Chef), but still retain the ability to signal
|
||||
notification events (like Puppet). This is kind of a ‘best of both worlds’ thing.</p>
|
||||
<p>There is no central server to promote scaling, and Ansible is
|
||||
also designed with multi-node deployment in mind from day-one – something that is difficult
|
||||
for Puppet because of the pull architecture. Ansible is push based,
|
||||
so you can do things in an ordered fashion, addressing batches of servers
|
||||
at one time, and you do not have to contend with the DAG. It’s also extensible in any language
|
||||
and the source is designed so that you don’t have to be an expert programmer to submit a patch.</p>
|
||||
<p>Ansible’s resources are heavily inspired by Puppet, with the “state” keyword being a more or less
|
||||
direct port of “ensure” from Puppet. Unlike Puppet, Ansible can be extended in any language,
|
||||
even bash ... just return some output in JSON format. You don’t need to know Ruby.</p>
|
||||
<p>Unlike Puppet, hosts are taken out of playbooks when they have a failure. It encourages
|
||||
‘fail first’, so you can correct the error, instead of configuring as much of the system
|
||||
as it can. A system shouldn’t be half correct, especially if we’re planning on configuring
|
||||
other systems that depend on that system.</p>
|
||||
<p>Ansible also has a VERY short learning curve – but it also has less language constructs and
|
||||
does not create it’s own programming language. What constructs Ansible does have should be enough to cover 80% or so of the cases of most Puppet users, and it should scale equally well (not having a server is
|
||||
almost like cheating).</p>
|
||||
<p>I also suspect some Ansible users will actually use Ansible to trigger Puppet – using the git
|
||||
module to checkout a Puppet module hierachy from source, and the command module to run
|
||||
‘puppet apply’. That’s ok too, but you may find playbooks do all you need.</p>
|
||||
<p>Ansible does support gathering variables from ‘facter’, if installed, and Ansible templates
|
||||
in jinja2 in a way just like Puppet does with erb.</p>
|
||||
</div>
|
||||
<div class="section" id="vs-chef">
|
||||
<h3>vs Chef?<a class="headerlink" href="#vs-chef" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Much in the ways Ansible is different from Puppet. Chef is notoriously hard
|
||||
to set up on the server, and requires that you know how to program in Ruby to
|
||||
use the language. As such, it seems to have a pretty good following mainly
|
||||
among Rails coders.</p>
|
||||
<p>Like Chef (and unlike Puppet), Ansible executes configuration tasks in the order
|
||||
given, rather than having to manually specify a dependency graph. Ansible extends
|
||||
this though, by allowing triggered notifiers, so Apache can, be restarted if needed,
|
||||
only once, at the end of a configuration run.</p>
|
||||
<p>Unlike Chef, Ansible’s playbooks are not a programming language. This means
|
||||
that you can parse Ansible’s playbooks and treat the instructions as data. It also
|
||||
means working on your infrastructure is not a development task and testing is easier.</p>
|
||||
<p>Ansible can be used regardless of your programming language experience. Both
|
||||
Chef and Puppet are around 60k+ lines of code, while Ansible is a much simpler
|
||||
program. I believe this strongly leads to more reliable software and a richer
|
||||
open source community – the code is kept simple so it is easy for anyone to
|
||||
submit a patch or module.</p>
|
||||
<p>Just like with puppet, some users may wish to use Ansible to trigger chef-solo to
|
||||
avoid using the server, after checking out some chef content using Ansible’s git
|
||||
support.</p>
|
||||
<p>Ansible does support gathering variables from ‘ohai’, if installed.</p>
|
||||
</div>
|
||||
<div class="section" id="vs-capistrano-fabric">
|
||||
<h3>vs Capistrano/Fabric?<a class="headerlink" href="#vs-capistrano-fabric" title="Permalink to this headline">¶</a></h3>
|
||||
<p>These tools aren’t really well suited to doing idempotent configuration and are
|
||||
typically about pushing software out for web deployment and automating steps.</p>
|
||||
<p>Meanwhile Ansible is designed for other types of configuration management, and contains some
|
||||
advanced scaling features.</p>
|
||||
<p>The ansible playbook syntax is documented within a page of text and also has a MUCH lower learning curve. And because Ansible is designed for more than pushing webapps, it’s more generally
|
||||
useful for sysadmins (not just web developers), and can also be used for firing off ad-hoc tasks.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="other-questions">
|
||||
<h2>Other Questions<a class="headerlink" href="#other-questions" title="Permalink to this headline">¶</a></h2>
|
||||
<div class="section" id="how-does-ansible-scale">
|
||||
<h3>How does Ansible scale?<a class="headerlink" href="#how-does-ansible-scale" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Whether in single-execution mode or using ansible playbooks, ansible can
|
||||
run multiple commands in seperate forks, thanks to the magic behind
|
||||
Python’s multiprocessing module.</p>
|
||||
<p>If you need to address 500 machines you can decide if you want to try
|
||||
to contact 5 at a time, or 50 at a time.
|
||||
It’s up to you and how much power you can throw at it, but it’s heritage
|
||||
is about handling those kinds of use cases.</p>
|
||||
<p>There are no daemons so it’s entirely up to you. When you are aren’t using
|
||||
Ansible, it is not consuming any resources.</p>
|
||||
<p>If you have 10,000 systems, running a single ansible playbook against all of
|
||||
them probably isn’t always appropriate, but most users shouldn’t have any problems.
|
||||
If you want to kick off an async task/module, it’s probably fine.</p>
|
||||
<p>If you’d like to discuss scaling, please hop on the mailing list.</p>
|
||||
</div>
|
||||
<div class="section" id="are-transports-other-than-ssh-supported">
|
||||
<h3>Are transports other than SSH supported?<a class="headerlink" href="#are-transports-other-than-ssh-supported" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Currently SSH is the only one, though the intent is to make this entirely
|
||||
pluggable very soon so if you wanted to build a message bus or XMPP (or even
|
||||
sneaker net?) adapter ansible will let you do that. Stay tuned!</p>
|
||||
</div>
|
||||
<div class="section" id="what-are-some-ideal-uses-for-ansible">
|
||||
<h3>What are some ideal uses for Ansible?<a class="headerlink" href="#what-are-some-ideal-uses-for-ansible" title="Permalink to this headline">¶</a></h3>
|
||||
<p>One of the best use cases? Complex multi-node cloud deployments using playbooks. Another good
|
||||
example is for configuration management where you
|
||||
are starting from a clean OS with no extra software installed, adopting systems
|
||||
that are already deployed.</p>
|
||||
<p>Ansible is also great for running ad-hoc tasks across a wide variety of Linux, Unix, and <a href="#id1"><span class="problematic" id="id2">*</span></a>BSDs.
|
||||
Because it just uses the basic tools available on the system, it is exceptionally cross platform
|
||||
without needing to install management packages on each node.</p>
|
||||
<p>It also excels for writing distributed
|
||||
scripts and ad-hoc applications that need to gather data or perform arbitrary
|
||||
tasks – whether for a QA sytem, build system, or anything you can think of.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
|
||||
</div>
|
||||
<footer class="footer">
|
||||
<div class="container">
|
||||
<p class="pull-right"><a href="#">Back to top</a></p>
|
||||
<p>
|
||||
© Copyright 2012 Michael DeHaan.<br/>
|
||||
Last updated on Mar 09, 2012.<br/>
|
||||
Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.0.8.<br/>
|
||||
</p>
|
||||
</div>
|
||||
</footer>
|
||||
</body>
|
||||
</html>
|
||||
26
html/man/ansible-playbook.1.html
Normal file
26
html/man/ansible-playbook.1.html
Normal file
|
|
@ -0,0 +1,26 @@
|
|||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<!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>ansible-playbook</title><link rel="stylesheet" href="./docbook-xsl.css" type="text/css" /><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /></head><body><div xml:lang="en" class="refentry" title="ansible-playbook" lang="en"><a id="id491207"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ansible-playbook — run an ansible playbook</p></div><div class="refsynopsisdiv" title="Synopsis"><a id="_synopsis"></a><h2>Synopsis</h2><p>ansible-playbook <filename.yml> … [options]</p></div><div class="refsect1" title="DESCRIPTION"><a id="_description"></a><h2>DESCRIPTION</h2><p><span class="strong"><strong>Ansible playbooks</strong></span> are a configuration and multinode deployment system. Ansible-playbook is the tool
|
||||
used to run them. See the project home page (link below) for more information.</p></div><div class="refsect1" title="ARGUMENTS"><a id="_arguments"></a><h2>ARGUMENTS</h2><div class="variablelist"><dl><dt><span class="term">
|
||||
<span class="strong"><strong>filename.yml</strong></span>
|
||||
</span></dt><dd>
|
||||
The names of one or more YAML format files to run as ansible playbooks.
|
||||
</dd></dl></div></div><div class="refsect1" title="OPTIONS"><a id="_options"></a><h2>OPTIONS</h2><div class="variablelist"><dl><dt><span class="term">
|
||||
<span class="strong"><strong>-i</strong></span>, <span class="strong"><strong>--inventory</strong></span>
|
||||
</span></dt><dd>
|
||||
Path to the inventory hosts file, which defaults to /etc/ansible/hosts.
|
||||
</dd><dt><span class="term">
|
||||
<span class="strong"><strong>-M</strong></span>, <span class="strong"><strong>--module-path</strong></span>
|
||||
</span></dt><dd>
|
||||
Where to load modules from. The default is /usr/share/ansible
|
||||
</dd><dt><span class="term">
|
||||
<span class="strong"><strong>-f</strong></span>, <span class="strong"><strong>--forks</strong></span>
|
||||
</span></dt><dd>
|
||||
Desired level of parallelism. Default 5.
|
||||
</dd><dt><span class="term">
|
||||
<span class="strong"><strong>-k</strong></span>, <span class="strong"><strong>--ask-pass</strong></span>
|
||||
</span></dt><dd>
|
||||
Prompt for the SSH password instead of assuming key-based authentication with ssh-agent.
|
||||
</dd></dl></div></div><div class="refsect1" title="ENVIRONMENT"><a id="_environment"></a><h2>ENVIRONMENT</h2><p>The following environment variables may specified.</p><p>ANSIBLE_HOSTS — Override the default ansible hosts file</p><p>ANSIBLE_LIBRARY — Override the default ansible module library path</p></div><div class="refsect1" title="AUTHOR"><a id="_author"></a><h2>AUTHOR</h2><p>Ansible was originally written by Michael DeHaan. See the AUTHORS file
|
||||
for a complete list of contributors.</p></div><div class="refsect1" title="COPYRIGHT"><a id="_copyright"></a><h2>COPYRIGHT</h2><p>Copyright © 2012, Michael DeHaan</p><p>Ansible is released under the terms of the GPLv3 License.</p></div><div class="refsect1" title="SEE ALSO"><a id="_see_also"></a><h2>SEE ALSO</h2><p>Extensive documentation as well as IRC and mailing list info
|
||||
is available on the ansible home page: <a class="ulink" href="https://ansible.github.com/" target="_top">https://ansible.github.com/</a></p></div></div></body></html>
|
||||
Loading…
Reference in a new issue