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<div class="section" id="the-inventory-file-patterns-and-groups">
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<h1>The Inventory File, Patterns, and Groups<a class="headerlink" href="#the-inventory-file-patterns-and-groups" title="Permalink to this headline">¶</a></h1>
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<p>How to select hosts you wish to manage</p>
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<p class="first admonition-title">See also</p>
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<dt><a class="reference internal" href="examples.html"><em>Examples</em></a></dt>
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<dd>Examples of basic commands</dd>
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<dt><a class="reference internal" href="playbooks.html"><em>Playbooks: Ansible for Deployment, Configuration Management, and Orchestration</em></a></dt>
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<dd>Learning ansible’s configuration management language</dd>
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<div class="section" id="inventory-file-format">
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<h2>Inventory File Format<a class="headerlink" href="#inventory-file-format" title="Permalink to this headline">¶</a></h2>
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<p>Ansible works against multiple systems in your infrastructure at the
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same time. It does this by selecting portions of systems listed in Ansible’s inventory file,
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which defaults to /etc/ansible/hosts, and looks like this:</p>
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<div class="highlight-python"><div class="highlight"><pre><span class="n">mail</span><span class="o">.</span><span class="n">example</span><span class="o">.</span><span class="n">com</span>
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<span class="p">[</span><span class="n">webservers</span><span class="p">]</span>
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<span class="n">foo</span><span class="o">.</span><span class="n">example</span><span class="o">.</span><span class="n">com</span>
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<span class="n">bar</span><span class="o">.</span><span class="n">example</span><span class="o">.</span><span class="n">com</span>
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<span class="p">[</span><span class="n">dbservers</span><span class="p">]</span>
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<span class="n">one</span><span class="o">.</span><span class="n">example</span><span class="o">.</span><span class="n">com</span>
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<span class="n">two</span><span class="o">.</span><span class="n">example</span><span class="o">.</span><span class="n">com</span>
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<span class="n">three</span><span class="o">.</span><span class="n">example</span><span class="o">.</span><span class="n">com</span>
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</pre></div>
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<div class="section" id="selecting-targets">
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<h2>Selecting Targets<a class="headerlink" href="#selecting-targets" title="Permalink to this headline">¶</a></h2>
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<p>These patterns target all hosts in the inventory file:</p>
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<div class="highlight-python"><pre>all
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*</pre>
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</div>
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<p>It is also possible to address specific hosts:</p>
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<div class="highlight-python"><pre>one.example.com
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one.example.com:two.example.com</pre>
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</div>
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<p>The following patterns address one or more groups, which are denoted with the bracket
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headers in the inventory file:</p>
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<div class="highlight-python"><pre>webservers
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webservers:dbservers</pre>
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</div>
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<p>Individual hosts, but not groups, can also be referenced using wildcards:</p>
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<blockquote>
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<div><a href="#id1"><span class="problematic" id="id2">*</span></a>.example.com
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<a href="#id3"><span class="problematic" id="id4">*</span></a>.com</div></blockquote>
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<p>It’s also ok to mix wildcard patterns and groups at the same time:</p>
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<div class="highlight-python"><pre>one*.com:dbservers</pre>
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</div>
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<p>NOTE: It is not possible to target a host not in the inventory file.</p>
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<li><a class="reference internal" href="#">The Inventory File, Patterns, and Groups</a><ul>
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<li><a class="reference internal" href="#inventory-file-format">Inventory File Format</a></li>
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<li><a class="reference internal" href="#selecting-targets">Selecting Targets</a></li>
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© Copyright 2012 Michael DeHaan.
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Last updated on Mar 08, 2012.
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