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<li><a class="reference internal" href="#python-2-6-epel-instructions-for-rhel-and-centos-5">Python 2.6 EPEL instructions for RHEL and CentOS 5</a></li>
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<div class="section" id="getting-started">
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<h1><a class="toc-backref" href="#contents">Getting Started</a><a class="headerlink" href="#getting-started" title="Permalink to this headline">¶</a></h1>
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<div class="contents topic" id="contents">
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<p class="topic-title first">Contents</p>
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<ul class="simple">
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<li><a class="reference internal" href="#getting-started" id="id1">Getting Started</a><ul>
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<li><a class="reference internal" href="#requirements" id="id2">Requirements</a></li>
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<li><a class="reference internal" href="#python-2-6-epel-instructions-for-rhel-and-centos-5" id="id3">Python 2.6 EPEL instructions for RHEL and CentOS 5</a></li>
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<li><a class="reference internal" href="#getting-ansible" id="id4">Getting Ansible</a></li>
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<li><a class="reference internal" href="#choosing-between-paramiko-and-native-ssh" id="id5">Choosing Between Paramiko and Native SSH</a></li>
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<li><a class="reference internal" href="#your-first-commands" id="id6">Your first commands</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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<div class="section" id="requirements">
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<h2><a class="toc-backref" href="#contents">Requirements</a><a class="headerlink" href="#requirements" title="Permalink to this headline">¶</a></h2>
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<p>Requirements for Ansible are extremely minimal.</p>
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<p>Ansible is written for Python 2.6. If you are running Python 2.5 on an “Enterprise Linux” variant,
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your distribution can easily install 2.6 (see instructions in the next section). Newer versions
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of Linux and OS X should already have 2.6.</p>
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<p>In additon to Python 2.6, you will want the following packages:</p>
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<ul class="simple">
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<li><tt class="docutils literal"><span class="pre">paramiko</span></tt></li>
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<li><tt class="docutils literal"><span class="pre">PyYAML</span></tt></li>
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<li><tt class="docutils literal"><span class="pre">python-jinja2</span></tt></li>
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</ul>
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<p>On the managed nodes, you only need Python 2.4 or later, but if you are are running less than Python 2.6 on them, you will
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also need:</p>
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<ul class="simple">
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<li><tt class="docutils literal"><span class="pre">python-simplejson</span></tt></li>
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</ul>
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<div class="admonition note">
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<p class="first admonition-title">Note</p>
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<p class="last">Ansible’s “raw” module (for executing commands in a quick and dirty
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way) and the copy module – some of the most basic features in
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ansible – don’t even need that. So technically, you can use
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Ansible to install python-simplejson using the raw module, which
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then allows you to use everything else. (That’s jumping ahead
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though.)</p>
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</div>
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</div>
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<div class="section" id="python-2-6-epel-instructions-for-rhel-and-centos-5">
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<h2><a class="toc-backref" href="#contents">Python 2.6 EPEL instructions for RHEL and CentOS 5</a><a class="headerlink" href="#python-2-6-epel-instructions-for-rhel-and-centos-5" title="Permalink to this headline">¶</a></h2>
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<p>These distributions don’t have Python 2.6 by default, but it is easily
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installable. If you have not already done so, <a class="reference external" href="http://fedoraproject.org/wiki/EPEL">configure EPEL</a></p>
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<div class="highlight-bash"><div class="highlight"><pre><span class="nv">$ </span>yum install python26 python26-PyYAML python26-paramiko python26-jinja2
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</pre></div>
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</div>
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</div>
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<div class="section" id="getting-ansible">
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<h2><a class="toc-backref" href="#contents">Getting Ansible</a><a class="headerlink" href="#getting-ansible" title="Permalink to this headline">¶</a></h2>
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<p>If you are interested in using all the latest features, you may wish to keep up to date
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with the development branch of the git checkout. This also makes it easiest to contribute
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back to the project.</p>
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<p>Instructions for installing from source are below.</p>
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<p>Ansible’s release cycles are about one month long. Due to this
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short release cycle, any bugs will generally be fixed in the next release versus maintaining
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backports on the stable branch.</p>
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<p>You may also wish to follow the <a class="reference external" href="https://github.com/ansible/ansible">Github project</a> if
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you have a github account. This is also where we keep the issue tracker for sharing
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bugs and feature ideas.</p>
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<div class="section" id="running-from-checkout">
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<h3>Running From Checkout<a class="headerlink" href="#running-from-checkout" title="Permalink to this headline">¶</a></h3>
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<p>Ansible is trivially easy to run from a checkout, root permissions are not required
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to use it:</p>
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<div class="highlight-bash"><div class="highlight"><pre><span class="nv">$ </span>git clone git://github.com/ansible/ansible.git
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<span class="nv">$ </span><span class="nb">cd</span> ./ansible
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<span class="nv">$ </span><span class="nb">source</span> ./hacking/env-setup
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</pre></div>
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</div>
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<p>You can optionally specify an inventory file (see <a class="reference internal" href="patterns.html"><em>Inventory & Patterns</em></a>) other than /etc/ansible/hosts:</p>
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<div class="highlight-bash"><div class="highlight"><pre><span class="nv">$ </span><span class="nb">echo</span> <span class="s2">"127.0.0.1"</span> > ~/ansible_hosts
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<span class="nv">$ </span><span class="nb">export </span><span class="nv">ANSIBLE_HOSTS</span><span class="o">=</span>~/ansible_hosts
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</pre></div>
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</div>
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<p>Now let’s test things:</p>
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<div class="highlight-bash"><div class="highlight"><pre><span class="nv">$ </span>ansible all -m ping --ask-pass
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</pre></div>
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</div>
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</div>
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<div class="section" id="make-install">
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<h3>Make Install<a class="headerlink" href="#make-install" title="Permalink to this headline">¶</a></h3>
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<p>If you are not working from a distribution where Ansible is packaged yet, you can install Ansible
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using “make install”. This is done through <cite>python-distutils</cite>:</p>
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<div class="highlight-bash"><div class="highlight"><pre><span class="nv">$ </span>git clone git://github.com/ansible/ansible.git
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<span class="nv">$ </span><span class="nb">cd</span> ./ansible
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<span class="nv">$ </span>sudo make install
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</pre></div>
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</div>
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</div>
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<div class="section" id="via-rpm">
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<h3>Via RPM<a class="headerlink" href="#via-rpm" title="Permalink to this headline">¶</a></h3>
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<p>RPMs for the last Ansible release are available for <a class="reference external" href="http://fedoraproject.org/wiki/EPEL">EPEL</a> 6 and currently supported
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Fedora distributions. Ansible itself can manage earlier operating
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systems that contain python 2.4 or higher.</p>
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<div class="highlight-bash"><div class="highlight"><pre><span class="c"># install the epel-release RPM if needed on CentOS, RHEL, or Scientific Linux</span>
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<span class="nv">$ </span>sudo yum install ansible
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</pre></div>
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</div>
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<p>You can also use the <tt class="docutils literal"><span class="pre">make</span> <span class="pre">rpm</span></tt> command to build an RPM you can
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distribute and install:</p>
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<div class="highlight-bash"><div class="highlight"><pre><span class="nv">$ </span>git clone git://github.com/ansible/ansible.git
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<span class="nv">$ </span><span class="nb">cd</span> ./ansible
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<span class="nv">$ </span>make rpm
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<span class="nv">$ </span>sudo rpm -Uvh ~/rpmbuild/ansible-*.noarch.rpm
|
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</pre></div>
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</div>
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</div>
|
|
<div class="section" id="debian-gentoo-arch-others">
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|
<h3>Debian, Gentoo, Arch, Others<a class="headerlink" href="#debian-gentoo-arch-others" title="Permalink to this headline">¶</a></h3>
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<p>Ubuntu builds are available <a class="reference external" href="https://launchpad.net/~rquillo/+archive/ansible">in a PPA here</a></p>
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<p>Debian/Ubuntu package recipes can also be built from the source checkout, run:</p>
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|
<div class="highlight-bash"><div class="highlight"><pre><span class="nv">$ </span>make debian
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</pre></div>
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</div>
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<p>Gentoo eBuilds are available <a class="reference external" href="https://github.com/uu/ubuilds">on github here</a></p>
|
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<p>An Arch PKGBUILD is available on <a class="reference external" href="https://aur.archlinux.org/packages.php?ID=58621">AUR</a>
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If you have python3 installed on Arch, you probably want to symlink python to python2:</p>
|
|
<div class="highlight-bash"><div class="highlight"><pre><span class="nv">$ </span>sudo ln -sf /usr/bin/python2 /usr/bin/python
|
|
</pre></div>
|
|
</div>
|
|
<p>If you would like to package Ansible for Homebrew, BSD, or others,
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|
please stop by the mailing list and say hi!</p>
|
|
</div>
|
|
<div class="section" id="tagged-releases">
|
|
<h3>Tagged Releases<a class="headerlink" href="#tagged-releases" title="Permalink to this headline">¶</a></h3>
|
|
<p>Tagged releases are available as tar.gz files from the Ansible github
|
|
project page:</p>
|
|
<ul class="simple">
|
|
<li><a class="reference external" href="https://github.com/ansible/ansible/downloads">Ansible/downloads</a></li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
<div class="section" id="choosing-between-paramiko-and-native-ssh">
|
|
<h2><a class="toc-backref" href="#contents">Choosing Between Paramiko and Native SSH</a><a class="headerlink" href="#choosing-between-paramiko-and-native-ssh" title="Permalink to this headline">¶</a></h2>
|
|
<p>By default, ansible uses paramiko to talk to managed nodes over SSH. Paramiko is fast, works
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|
very transparently, requires no configuration, and is a good choice for most users.
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|
However, it does not support some advanced SSH features that folks will want to use.</p>
|
|
<p class="versionadded">
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<span class="versionmodified">New in version 0.5.</span></p>
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|
<p>If you want to leverage more advanced SSH features (such as Kerberized
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|
SSH or jump hosts), pass the flag “–connection=ssh” to any ansible
|
|
command, or set the ANSIBLE_TRANSPORT environment variable to
|
|
‘ssh’. This will cause Ansible to use openssh tools instead.</p>
|
|
<p>If ANSIBLE_SSH_ARGS are not set, ansible will try to use some sensible ControlMaster options
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|
by default. You are free to override this environment variable, but should still pass ControlMaster
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|
options to ensure performance of this transport. With ControlMaster in use, both transports
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|
are roughly the same speed. Without CM, the binary ssh transport is signficantly slower.</p>
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|
<p>If none of this makes sense to you, the default paramiko option is probably fine.</p>
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</div>
|
|
<div class="section" id="your-first-commands">
|
|
<h2><a class="toc-backref" href="#contents">Your first commands</a><a class="headerlink" href="#your-first-commands" title="Permalink to this headline">¶</a></h2>
|
|
<p>Now that you’ve installed Ansible, it’s time to test it.</p>
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|
<p>Edit (or create) /etc/ansible/hosts and put one or more remote systems in it, for
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|
which you have your SSH key in <tt class="docutils literal"><span class="pre">authorized_keys</span></tt>:</p>
|
|
<div class="highlight-python"><pre>192.168.1.50
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|
aserver.example.org
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|
bserver.example.org</pre>
|
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</div>
|
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<p>Set up SSH agent to avoid retyping passwords:</p>
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|
<div class="highlight-bash"><div class="highlight"><pre><span class="nv">$ </span>ssh-agent bash
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|
<span class="nv">$ </span>ssh-add ~/.ssh/id_rsa
|
|
</pre></div>
|
|
</div>
|
|
<p>(Depending on your setup, you may wish to ansible’s –private-key-file option to specify a pem file instead)</p>
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|
<p>Now ping all your nodes:</p>
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<div class="highlight-bash"><div class="highlight"><pre><span class="nv">$ </span>ansible all -m ping
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</pre></div>
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</div>
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<p>In Ansible 0.7 and later, ansible will attempt to remote connect to the machines using your current
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user name, just like SSH would. In 0.6 and before, this actually defaults to ‘root’ (we liked the current
|
|
user behavior better). To override the remote user name, just use the ‘-u’ parameter.</p>
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<p>If you would like to access sudo mode, there are also flags to do that:</p>
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<div class="highlight-bash"><div class="highlight"><pre><span class="c"># as bruce</span>
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<span class="nv">$ </span>ansible all -m ping -u bruce
|
|
<span class="c"># as bruce, sudoing to root</span>
|
|
<span class="nv">$ </span>ansible all -m ping -u bruce --sudo
|
|
<span class="c"># as bruce, sudoing to batman</span>
|
|
<span class="nv">$ </span>ansible all -m ping -u bruce --sudo --sudo-user batman
|
|
</pre></div>
|
|
</div>
|
|
<p>Now run a live command on all of your nodes:</p>
|
|
<div class="highlight-bash"><div class="highlight"><pre><span class="nv">$ </span>ansible all -a <span class="s2">"/bin/echo hello"</span>
|
|
</pre></div>
|
|
</div>
|
|
<p>Congratulations. You’ve just contacted your nodes with Ansible. It’s
|
|
now time to read some of the more real-world <a class="reference internal" href="examples.html"><em>Command Line Examples And Next Steps</em></a>, and explore
|
|
what you can do with different modules, as well as the Ansible
|
|
<a class="reference internal" href="playbooks.html"><em>Playbooks</em></a> language. Ansible is not just about running commands, it
|
|
also has powerful configuration management and deployment features. There’s more to
|
|
explore, but you already have a fully working infrastructure!</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="examples.html"><em>Command Line Examples And Next Steps</em></a></dt>
|
|
<dd>Examples of basic commands</dd>
|
|
<dt><a class="reference internal" href="playbooks.html"><em>Playbooks</em></a></dt>
|
|
<dd>Learning ansible’s configuration management language</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>
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<br/>
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</div>
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<footer class="footer">
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<div class="container">
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<p>
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<p>
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|
© Copyright 2012 Michael DeHaan.<br/>
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Last updated on Sep 28, 2012.<br/>
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