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Move all html content on the website to build top level such that we do not need the redirect.

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pull/1256/head
Michael DeHaan 13 years ago
parent 0035181c59
commit 0404acfcc2
53 changed files with 356 additions and 1423 deletions
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Makefile
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#!/usr/bin/make #!/usr/bin/make
ASCII2HTMLMAN = a2x -D html/man/ -d manpage -f xhtml ASCII2HTMLMAN = a2x -D man/ -d manpage -f xhtml
SITELIB = $(shell python -c "from distutils.sysconfig import get_python_lib; print get_python_lib()") SITELIB = $(shell python -c "from distutils.sysconfig import get_python_lib; print get_python_lib()")
all: clean docs all: clean docs
@ -11,7 +11,7 @@ viewdocs: clean
./build-site.py view ./build-site.py view
htmlman: htmlman:
mkdir -p html/man mkdir -p man
$(ASCII2HTMLMAN) ansible/docs/man/man1/ansible.1.asciidoc $(ASCII2HTMLMAN) ansible/docs/man/man1/ansible.1.asciidoc
$(ASCII2HTMLMAN) ansible/docs/man/man1/ansible-playbook.1.asciidoc $(ASCII2HTMLMAN) ansible/docs/man/man1/ansible-playbook.1.asciidoc

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@ -22,7 +22,7 @@ import os
import sys import sys
import traceback import traceback
from sphinx.application import Sphinx from sphinx.application import Sphinx
from os import path import os
class SphinxBuilder(object): class SphinxBuilder(object):
@ -39,15 +39,15 @@ class SphinxBuilder(object):
try: try:
buildername = 'html' buildername = 'html'
outdir = path.abspath(path.join('html')) outdir = os.path.abspath(os.getcwd())
# Create the output directory if it doesn't exist # Create the output directory if it doesn't exist
if not os.access(outdir, os.F_OK): if not os.access(outdir, os.F_OK):
os.mkdir(outdir) os.mkdir(outdir)
doctreedir = os.path.join('./', '.doctrees') doctreedir = os.path.join('./', '.doctrees')
confdir = path.abspath('./') confdir = os.path.abspath('./')
srcdir = path.abspath('rst') srcdir = os.path.abspath('rst')
freshenv = False freshenv = False
# Create the builder # Create the builder

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# Sphinx build info version 1
# This file hashes the configuration used when building these files. When it is not found, a full rebuild will be done.
config:
tags:

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YAML Format
===========
This page provides a basic overview of correct YAML syntax, which is how Ansible
playbooks (our configuration management language) are expressed.
You may also wish to read playbook examples and will quickly pick this up from those.
YAML Basics
-----------
For `ansible`, every YAML file must be a list at it's root-most
element. Each item in the list is a dictionary. These dictionaries
represent all the options you can use to write an `ansible` file. In
addition, all YAML files (regardless of their association with
`ansible` or not) should start with ``---``.
In YAML a list can be represented in two ways. In one way all members
of a list are lines beginning at the same indenta`tion level starting
with a ``-`` character::
---
# A list of tasty fruits
- Apple
- Orange
- Strawberry
- Mango
In the second way a list is represented as comma separated elements
surrounded by square brackets. Newlines are permitted between
elements::
---
# A list of tasty fruits
[apple, orange, banana, mango]
A dictionary is represented in a simple ``key:`` and ``value`` form::
---
# An employee record
name: John Eckersberg
job: Developer
skill: Elite
Like lists, dictionaries can be represented in an abbreviated form::
---
# An employee record
{name: John Eckersberg, job: Developer, skill: Elite}
.. _truthiness:
You can specify a boolean value (true/false) in several forms::
---
knows_oop: True
likes_emacs: TRUE
uses_cvs: false
Finally, you can combine these data structures::
---
# An employee record
name: John Eckersberg
job: Developer
skill: Elite
employed: True
foods:
- Apple
- Orange
- Strawberry
- Mango
languages:
ruby: Elite
python: Elite
dotnet: Lame
That's all you really need to know about YAML to get started writing
`Ansible` playbooks.
.. seealso::
`YAMLLint <http://yamllint.com/>`_
YAML Lint gets the lint out of your YAML

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Using the Python API
====================
The Python API is very powerful, and is how the ansible CLI and ansible-playbook
are implemented.
It's pretty simple::
import ansible.runner
runner = ansible.runner.Runner(
module_name='ping',
module_args='',
pattern='web*',
forks=10
)
datastructure = runner.run()
The run method returns results per host, grouped by whether they
could be contacted or not. Return types are module specific, as
expressed in the 'ansible-modules' documentation.::
{
"dark" : {
"web1.example.com" : "failure message"
}
"contacted" : {
"web2.example.com" : 1
}
}
A module can return any type of JSON data it wants, so Ansible can
be used as a framework to rapidly build powerful applications and scripts.
Detailed API Example
````````````````````
The following script prints out the uptime information for all hosts::
#!/usr/bin/python
import ansible.runner
import sys
# construct the ansible runner and execute on all hosts
results = ansible.runner.Runner(
pattern='*', forks=10,
module_name='command', module_args=['/usr/bin/uptime'],
).run()
if results is None:
print "No hosts found"
sys.exit(1)
print "UP ***********"
for (hostname, result) in results['contacted'].items():
if not 'failed' in result:
print "%s >>> %s" % (hostname, result['stdout'])
print "FAILED *******"
for (hostname, result) in results['contacted'].items():
if 'failed' in result:
print "%s >>> %s" % (hostname, result['msg'])
print "DOWN *********"
for (hostname, result) in results['dark'].items():
print "%s >>> %s" % (hostname, result)
Advanced programmers may also wish to read the source to ansible itself, for
it uses the Runner() API (with all available options) to implement the
command line tools ``ansible`` and ``ansible-playbook``.

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Communicate and Get Involved
===========================
* Join the `ansible-project mailing list <http://groups.google.com/group/ansible-project>`_ on Google Groups
* Join `#ansible <irc://irc.freenode.net/#ansible>`_ on the `freenode IRC network <http://freenode.net/>`_
* Visit the `project page <https://github.com/ansible/ansible>`_ on Github
- View the `issue tracker <https://github.com/ansible/ansible/issues>`_

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Command Line Examples
=====================
The following examples show how to use `/usr/bin/ansible` for running ad-hoc tasks.
Start here. For configuration management and deployments, you'll want to pick up on
using `/usr/bin/ansible-playbook` -- the concepts port over directly.
.. seealso::
:doc:`modules`
A list of available modules
:doc:`playbooks`
Alternative ways to use ansible
Parallelism and Shell Commands
``````````````````````````````
Let's use ansible's command line tool to reboot all web servers in Atlanta, 10 at a time::
ssh-agent bash
ssh-add ~/.ssh/id_rsa.pub
ansible atlanta -a "/sbin/reboot" -f 10
The -f 10 specifies the usage of 10 simultaneous processes.
Note that other than the command module, ansible modules do not work like simple scripts. They make the remote system look like you state, and run the commands neccessary to get it there. This is commonly refered to
as 'idempotency'.
File Transfer & Templating
``````````````````````````
Ansible can SCP lots of files to multiple machines in parallel, and optionally use them as template sources.
To just transfer a file directly to many different servers::
ansible atlanta copy -a "/etc/hosts /tmp/hosts"
To use templating, first run the setup module to put the template variables you would like to use on the remote host. Then use the template module to write the files using the templates. Templates are written in Jinja2 format. Playbooks (covered elsewhere in the documentation) will run the setup module for you, making this even simpler.::
ansible webservers -m setup -a "favcolor=red ntp_server=192.168.1.1"
ansible webservers -m template -a "src=/srv/motd.j2 dest=/etc/motd"
ansible webservers -m template -a "src=/srv/ntp.j2 dest=/etc/ntp.conf"
Need something like the fqdn in a template? If facter or ohai are installed, data from these projects will also be made available to the template engine, using 'facter' and 'ohai' prefixes for each.
Deploying From Source Control
`````````````````````````````
Deploy your webapp straight from git::
ansible webservers -m git -a "repo=git://foo dest=/srv/myapp version=HEAD"
Since ansible modules can notify change handlers (see 'Playbooks') it is possible to tell ansible to run specific tasks when the code is updated, such as deploying Perl/Python/PHP/Ruby directly from git and then restarting apache.
Managing Services
`````````````````
Ensure a service is started on all webservers::
ansible webservers -m service name=httpd state=started
Alternatively, restart a service on all webservers::
ansible webservers -m service name=httpd state=restarted
Time Limited Background Operations
``````````````````````````````````
Long running operations can be backgrounded, and their status can be checked on later. The same job ID is given to the same task on all hosts, so you won't lose track. Polling support is pending in the command line.::
ansible all -B 3600 -a "/usr/bin/long_running_operation --do-stuff"
ansible all -n job_status -a jid=123456789
Any module other than 'copy' or 'template' can be backgrounded. Typically you'll be backgrounding shell
commands or software upgrades only.
After the time limit (in seconds) runs out (-B), the process on the remote nodes will be killed.

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Getting Started
===============
How to download ansible and get started using it
.. seealso::
:doc:`examples`
Examples of basic commands
:doc:`playbooks`
Learning ansible's configuration management language
Requirements
````````````
Requirements for Ansible are extremely minimal.
If you are running python 2.6 on the **overlord** machine (the machine that you'll be talking to the other machines from), you will need:
* ``paramiko``
* ``PyYAML``
* ``python-jinja2`` (for playbooks)
If you are running less than Python 2.6, you will also need:
* The Python 2.4 or 2.5 backport of the ``multiprocessing`` module
- `Installation and Testing Instructions <http://code.google.com/p/python-multiprocessing/wiki/Install>`_
* ``simplejson``
On the managed nodes, to use templating, you will need:
* ``python-jinja2`` (you can install this with ansible)
Developer Requirements
``````````````````````
For developers, you may wish to have:
* ``asciidoc`` (for building manpage documentation)
* ``python-sphinx`` (for building content for the ansible.github.com project only)
Getting Ansible
```````````````
Tagged releases are available as tar.gz files from the Ansible github
project page:
* `Ansible/downloads <https://github.com/ansible/ansible/downloads>`_
You can also clone the git repository yourself and install Ansible in
one of two ways:
Python Distutils
++++++++++++++++
You can also install Ansible using Python Distutils::
$ git clone git://github.com/ansible/ansible.git
$ cd ./ansible
$ sudo make install
Via RPM
+++++++
In the near future, pre-built RPMs will be available through your distribution. Until that time you
can use the ``make rpm`` command::
$ git clone git://github.com/ansible/ansible.git
$ cd ./ansible
$ make rpm
$ sudo rpm -Uvh ~/rpmbuild/RPMS/noarch/ansible-1.0-1.noarch.rpm
Your first commands
```````````````````
Edit /etc/ansible/hosts and put one or more remote systems in it, for which you have your SSH
key in ``authorized_keys``::
192.168.1.50
aserver.example.org
bserver.example.org
Set up SSH agent to avoid retyping passwords::
ssh-agent bash
ssh-add ~/.ssh/id_rsa
Now ping all your nodes::
ansible all -m ping
Now run a live command on all of your nodes::
ansible all /bin/echo hello
Congratulations. You've just contacted your nodes with Ansible. It's now time to read some
of the more real-world examples, and explore what you can do with different modules, as well
as the Ansible playbooks language. Ansible is not just about running commands, but you already
have a working infrastructure!

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.. Director documentation master file, created by sphinx-quickstart on Sat Sep 27 13:23:22 2008.
You can adapt this file completely to your liking, but it should at least
contain the root `toctree` directive.
Ansible
=======
Ansible is a radically simple deployment, configuration, and command execution framework.
Other tools in this space have been too complicated for too long, require too much bootstrapping,
and have too much learning curve. Ansible is dead simple and painless to extend. For comparison, Puppet and Chef have about 60k lines of code. Ansible's core is a little over 1000 lines.
Ansible isn't just for configuration -- it's also great for Ad-Hoc tasks,
quickly firing off commands against nodes. Where Ansible excels though, is expressing complex multi-node deployment processes, executing complex sequences of commands on different hosts through "playbooks".
Extending ansible does not require programming in any particular language -- you can write modules
as scripts or programs that return simple JSON. It's also trivially easy to just execute
useful shell commands.
Why use Ansible versus something else? (Puppet, Chef, Fabric, Capistrano,
mCollective, Func, SaltStack, etc?) Ansible will have far less code, it
will be (by extension) more correct, and it will be the easiest thing to hack on and
use you'll ever see -- regardless of your favorite language of choice.
Systems management doesn't have to be complicated. Ansible's docs will remain
short & simple, and the source will be blindingly obvious.
Design Goals
````````````
* Dead simple setup
* Super fast & parallel by default
* No server or client daemons; use existing SSHd out of the box
* No additional software required on client boxes
* Modules can be written in ANY language
* Awesome API for creating very powerful distributed scripts
* Be very usable as non-root
* Create the easiest config management system to use, ever.
Communicate and Get Involved
````````````````````````````
Your ideas and contributions are welcome. We're also happy to help you with questions about Ansible.
* Join the `ansible-project mailing list <http://groups.google.com/group/ansible-project>`_ on Google Groups
* Join `#ansible <irc://irc.freenode.net/#ansible>`_ on the `freenode IRC network <http://freenode.net/>`_
* Visit the `project page <https://github.com/ansible/ansible>`_ on Github
- View the `issue tracker <https://github.com/ansible/ansible/issues>`_
Contents
========
.. toctree::
:maxdepth: 3
gettingstarted
patterns
examples
modules
YAMLScripts
playbooks
api
man
About the Author
````````````````
Ansible was originally developed by Michael DeHaan, a Raleigh, NC based software developer and architect.
He created other popular DevOps programs such as Cobbler, the popular Linux install server.
Cobbler is used to deploy mission critical systems all over the planet, in industries
ranging from massively multiplayer gaming, core internet infrastructure, finance,
chip design, and more. Michael also helped co-author of Func, a precursor to Ansible, which is used
to orchestrate systems in lots of diverse places. He's worked on systems software for
IBM, Motorola, Red Hat's Emerging Technologies Group, Puppet Labs, and rPath.

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.. _man:
Man Pages
=========
Ansible's manpage lists available command line options.
ansible(1)
----------
* `View ansible.1 <man/ansible.1.html>`_

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Ansible Modules
===============
Ansible ships with a number of modules that can be executed directly on remote hosts or through
ansible playbooks.
.. seealso::
:doc:`examples`
Examples of using modules in /usr/bin/ansible
:doc:`playbooks`
Examples of using modules with /usr/bin/ansible-playbook
:doc:`api`
Examples of using modules with the Python API
Nearly all modules take key=value parameters. Some modules take no parameters, and the command
module just takes arguments for the command you want to run.
All modules return JSON format data, thoug if you are using the command line or playbooks, you
don't really need to know much about that.
Most modules other than command are idempotent, meaning they will seek to avoid changes
unless a change needs to be made. When using ansible playbooks, these modules can
trigger change events. Unless otherwise noted, all modules support change hooks.
Stock modules:
command
```````
The command module takes the command name followed by a list of arguments, space delimited.
This is the only module that does not use key=value style parameters.
Example usage::
/sbin/shutdown -t now
The given shell command will be executed on all selected nodes.
This module does not support change hooks and returns the return code from the program as well as timing information about how long the command was running for.
copy
````
The copy module moves a file on the local box to remote locations.
*src*::
Local path to a file to copy to the remote server. This can be an absolute or relative path.
*dest*::
Remote absolute path where the file should end up.
This module also returns md5sum information about the resultant file.
facter
``````
Runs the discovery program 'facter' on the remote system, returning
JSON data that can be useful for inventory purposes.
Requires that 'facter' and 'ruby-json' be installed on the remote end.
This module is informative only - it takes no parameters & does not support change hooks,
nor does it make any changes on the system. Playbooks do not actually use
this module, they use the 'setup' module behind the scenes.
git
```
Deploys software (or files) from git checkouts.
*repo*::
git or http protocol address of the repo to checkout
*dest*::
where to check it out, an absolute directory path
*version*::
what version to check out -- either the git SHA, the literal string 'HEAD', or a tag name
ohai
````
Similar to the facter module, this returns JSON inventory data. Ohai
data is a bit more verbose and nested than facter.
Requires that 'ohai' be installed on the remote end.
This module is information only - it takes no parameters & does not
support change hooks, nor does it make any changes on the system.
Playbooks should not call the ohai module, playbooks call the 'setup'
module behind the scenes instead.
ping
````
A trivial test module, this module always returns the integer '1' on
successful contact.
This module does not support change hooks and is informative only - it takes no parameters & does not
support change hooks, nor does it make any changes on the system.
service
```````
Controls services on remote machines.
*state*
Values are 'started', 'stopped', or 'restarted'. Started/stopped
are idempotent actions that will not run commands unless neccessary.
'restarted' will always bounce the service
*name*
The name of the service
setup
`````
Writes a JSON file containing key/value data, for use in templating.
Call this once before using the template modules. Playbooks will
execute this module automatically as the first step in each play using
the variables section, so it is unneccessary to make explicit calls to
setup within a playbook.
If facter or ohai are installed, variables from these programs will also
be snapshotted into the JSON file for usage in templating. These variables
are prefixed with 'facter_' and 'ohai_" so it's easy to tell their source.
All variables are then bubbled up to the caller.
*anything*
any other parameters can be named basically anything, and set a key=value
pair in the JSON file for use in templating.
template
````````
Templates a file out to a remote server. Call the setup module prior to usage.
*src*
path of a Jinja2 formatted template on the local server. This can be a relative
or absolute path.
*dest*
location to render the template on the remote server
This module also returns md5sum information about the resultant file.
Writing your own modules
````````````````````````
To write your own modules, simply follow the convention of those already available in
/usr/share/ansible. Modules must return JSON but can be written in any language.
Modules should return hashes, but hashes can be nested.
To support change hooks, modules should return hashes with a changed: True/False
element at the top level::
{
'changed' : True,
'something' : 42
}
Modules can also choose to indicate a failure scenario by returning a top level 'failure'
element with a True value, and a 'msg' element describing the nature of the failure.
Other return values are up to the module.
{
'failure' : True,
'msg' : "here is what happened..."
}
When shipping modules, drop them in /usr/share/ansible, or specify the module path to the
command line tool or API. It is easy to test modules by running them directly on
the command line, passing them arguments just like they would be passed with ansible.

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.. _patterns:
The Inventory File, Patterns, and Groups
========================================
How to select hosts you wish to manage
.. seealso::
:doc:`examples`
Examples of basic commands
:doc:`playbooks`
Learning ansible's configuration management language
Inventory File Format
+++++++++++++++++++++
Ansible works against multiple systems in your infrastructure at the
same time. It does this by selecting portions of systems listed in Ansible's inventory file,
which defaults to /etc/ansible/hosts, and looks like this::
mail.example.com
[webservers]
foo.example.com
bar.example.com
[dbservers]
one.example.com
two.example.com
three.example.com
Selecting Targets
+++++++++++++++++
These patterns target all hosts in the inventory file::
all
*
It is also possible to address specific hosts::
one.example.com
one.example.com:two.example.com
The following patterns address one or more groups, which are denoted
with the bracket headers in the inventory file::
webservers
webservers:dbservers
Individual hosts, but not groups, can also be referenced using
wildcards::
*.example.com
*.com
It's also ok to mix wildcard patterns and groups at the same time::
one*.com:dbservers
NOTE: It is not possible to target a host not in the inventory file.

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Playbooks
=========
.. seealso::
:doc:`YAMLScripts`
Learn about YAML syntax
:doc:`modules`
Learn about available modules and writing your own
:doc:`patterns`
Learn about how to select hosts
Playbooks are a completely different way to use ansible and are
particularly awesome.
They are the basis for a really simple configuration management and
multi-machine deployment system, unlike any that already exist, and
one that is very well suited to deploying complex applications.
While you might run the main ``/usr/bin/ansible`` program for ad-hoc
tasks, playbooks are more likely to be kept in source control and used
to push out your configuration or assure the configurations of your
remote systems are in spec.
Playbook Example
````````````````
Playbooks are expressed in YAML format and have a minimum of syntax.
Each playbook is composed of one or more 'plays' in a list. By
composing a playbook of multiple 'plays', it is possible to
orchestrate multi-machine deployments, running certain steps on all
machines in the webservers group, then certain steps on the database
server group, then more commands back on the webservers group, etc::
---
- hosts: webservers
vars:
http_port: 80
max_clients: 200
user: root
tasks:
- include: base.yml somevar=3 othervar=4
- name: write the apache config file
action: template src=/srv/httpd.j2 dest=/etc/httpd.conf
notify:
- restart apache
- name: ensure apache is running
action: service name=httpd state=started
handlers:
- include: handlers.yml
Hosts line
``````````
The hosts line is a list of one or more groups or host patterns,
seperated by colons, asdescribed in the :ref:`patterns` documentation.
This is just like the first parameter to ``/usr/bin/ansible``.
Vars section
````````````
A list of variables and values that can be used in the plays. These
can be used in templates or 'action' lines and are dereferenced using
```jinja2``` syntax like this::
{{ varname }}
Further, if there are discovered variables about the system (say, if
facter or ohai were installed) these variables bubble up back into the
playbook, and can be used on each system just like explicitly set
variables. Facter variables are prefixed with ``facter_`` and Ohai
variables are prefixed with ``ohai_``. So for instance, if I wanted
to write the hostname into the /etc/motd file, I could say::
- name: write the motd
- action: template src=/srv/templates/motd.j2 dest=/etc/motd
And in /srv/templates/motd.j2::
You are logged into {{ facter_hostname }}
But we're getting ahead of ourselves. Let's talk about tasks.
Tasks list
``````````
Each play contains a list of tasks. Tasks are executed in order, one
at a time, against all machines matched by the play's host pattern,
before moving on to the next task.
Hosts with failed tasks are taken out of the rotation for the entire
playbook. If things fail, simply correct the playbook file and rerun.
Modules other than command are idempotent, meaning if you run them
again, they will make the changes they are told to make to bring the
system to the desired state.
Task name and action
`````````````````````
Every task must have a name, which is included in the output from
running the playbook.
The action line is the name of an ansible module followed by
parameters. Usually these are expressed in ``key=value`` form, except
for the command module, which looks just like a Linux/Unix command
line. See the module documentation for more info.
Variables, as mentioned above, can be used in action lines. So if,
hypothetically, you wanted to make a directory on each system named
after the hostname ... yeah, that's I know silly ... you could do it
like so::
- name: make a directory
- action: mkdir /tmp/{{ facter_hostname }}
Notify statements
`````````````````
Nearly all modules are written to be 'idempotent' and can signal when
they have affected a change on the remote system. If a notify
statement is used, the named handler will be run against each system
where a change was effected, but NOT on systems where no change
occurred. This happens after all of the tasks are run. For example,
if notifying Apache and potentially replacing lots of configuration
files, you could have Apache restart just once, at the end of a run.
If you need Apache restarted in the middle of a run, you could just
make a task for it, no harm done. Notifiers are optional.
Handlers
````````
Handlers are lists of tasks, not really any different from regular
tasks, that are referenced by name. Handlers are what notifiers
notify. If nothing notifies a handler, it will not run. Regardless
of how many things notify a handler, it will run only once, after all
of the tasks complete in a particular play.
Includes
````````
Not all tasks have to be listed directly in the main file. An include
file can contain a list of tasks (in YAML) as well, optionally passing
extra variables into the file. Variables passed in can be deferenced
like this (assume a variable named 'user')::
{{ user }}
For instance, if deploying multiple wordpress instances, I could
contain all of my tasks in a wordpress.yml file, and use it like so::
- tasks:
- include: wordpress.yml user=timmy
- include: wordpress.yml user=alice
- include: wordpress.yml user=bob
In addition to the explicitly passed in parameters, all variables from
the vars section are also available.
The format of an included list of tasks or handlers looks just like a
flat list of tasks. Here is an example of what base.yml might look
like::
---
- name: no selinux
action: command /usr/sbin/setenforce 0
- name: no iptables
action: service name=iptables state=stopped
- name: this is just to show variables work here, favcolor={{ favcolor }}
action: command /bin/true
As you can see above, variables in include files work just like they
do in the main file. Including a variable in the name of a task is a
contrived example, you could also pass them to the action command line
or use them inside a template file.
Note that include statements are only usable from the top level
playbook file. At this time, includes can not include other includes.
Using Includes To Assign Classes of Systems
```````````````````````````````````````````
Include files are best used to reuse logic between playbooks. You
could imagine a playbook describing your entire infrastructure like
this::
---
- hosts: atlanta-webservers
vars:
datacenter: atlanta
tasks:
- include: base.yml
- include: webservers.yml database=db.atlanta.com
handlers:
- include: generic-handlers.yml
- hosts: atlanta-dbservers
vars:
datacenter: atlanta
tasks:
- include: base.yml
- include: dbservers.yml
handlers:
- include: generic-handlers.yml
There is one (or more) play defined for each group of systems, and
each play maps each group includes one or more 'class definitions'
telling the systems what they are supposed to do or be.
Using a common handlers file could allow one task in 'webservers' to
define 'restart apache', and it could be reused between multiple
plays.
Variables like 'database' above can be used in templates referenced
from the configuration file to generate machine specific variables.
Asynchronous Actions and Polling
````````````````````````````````
(Information on this feature is pending)
Executing A Playbook
````````````````````
To run a playbook::
ansible-playbook playbook.yml

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<div class="section" id="introducing-ansible">
<h1>Introducing Ansible<a class="headerlink" href="#introducing-ansible" title="Permalink to this headline"></a></h1>
<p>Ansible is a radically simple deployment, configuration, and command
execution framework. Other tools in this space have been too
complicated for too long, require too much bootstrapping, and have too
much learning curve. Ansible is dead simple and painless to extend.
For comparison, Puppet and Chef have about 60k lines of code.
Ansible&#8217;s core is a little over 1000 lines.</p>
<p>Ansible isn&#8217;t just for configuration &#8211; it&#8217;s also great for Ad-Hoc
tasks, quickly firing off commands against nodes. Where Ansible
excels though, is expressing complex multi-node deployment processes,
executing complex sequences of commands on different hosts through
<a class="reference internal" href="playbooks.html"><em>Playbooks</em></a>.</p>
<p>Extending ansible does not require programming in any particular
language &#8211; you can write modules as scripts or programs that return
simple JSON. It&#8217;s also trivially easy to just execute useful shell
commands.</p>
<p>Why use Ansible versus something else? (Puppet, Chef, Fabric,
Capistrano, mCollective, Func, SaltStack, etc?) Ansible will have far
less code, it will be (by extension) more correct, and it will be the
easiest thing to hack on and use you&#8217;ll ever see &#8211; regardless of your
favorite language of choice.</p>
<p>Systems management doesn&#8217;t have to be complicated. Ansible&#8217;s docs
will remain short &amp; simple, and the source will be blindingly obvious.</p>
<div class="section" id="architecture">
<h2>Architecture<a class="headerlink" href="#architecture" title="Permalink to this headline"></a></h2>
<img alt="&quot;Architecture Diagram&quot;" src="http://ansible.github.com/html/ansible_arch.jpg" style="width: 648px; height: 464px;" />
</div>
<div class="section" id="design-goals">
<h2>Design Goals<a class="headerlink" href="#design-goals" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li>Dead simple setup</li>
<li>Super fast &amp; parallel by default</li>
<li>No server or client daemons; use existing SSHd out of the box</li>
<li>No additional software required on client boxes</li>
<li>Modules can be written in ANY language</li>
<li>Awesome API for creating very powerful distributed scripts</li>
<li>Be very usable as non-root</li>
<li>Create the easiest config management system to use, ever.</li>
</ul>
</div>
<div class="section" id="resources">
<h2>Resources<a class="headerlink" href="#resources" title="Permalink to this headline"></a></h2>
<p>Your ideas and contributions are welcome. We&#8217;re also happy to help
you with questions about Ansible.</p>
<ul class="simple">
<li>Join the <a class="reference external" href="http://groups.google.com/group/ansible-project">ansible-project mailing list</a> on Google Groups</li>
<li>Join <a class="reference external" href="irc://irc.freenode.net/#ansible">#ansible</a> on the <a class="reference external" href="http://freenode.net/">freenode IRC network</a></li>
<li>Visit the <a class="reference external" href="https://github.com/ansible/ansible">project page</a> on Github<ul>
<li>View the <a class="reference external" href="https://github.com/ansible/ansible/issues">issue tracker</a></li>
</ul>
</li>
</ul>
</div>
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<div class="section" id="contents">
<h1>Contents<a class="headerlink" href="#contents" title="Permalink to this headline"></a></h1>
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<li class="toctree-l1"><a class="reference internal" href="gettingstarted.html">Downloads &amp; Getting Started</a><ul>
<li class="toctree-l2"><a class="reference internal" href="gettingstarted.html#requirements">Requirements</a></li>
<li class="toctree-l2"><a class="reference internal" href="gettingstarted.html#developer-requirements">Developer Requirements</a></li>
<li class="toctree-l2"><a class="reference internal" href="gettingstarted.html#getting-ansible">Getting Ansible</a><ul>
<li class="toctree-l3"><a class="reference internal" href="gettingstarted.html#python-distutils">Python Distutils</a></li>
<li class="toctree-l3"><a class="reference internal" href="gettingstarted.html#via-rpm">Via RPM</a></li>
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<li class="toctree-l2"><a class="reference internal" href="gettingstarted.html#your-first-commands">Your first commands</a></li>
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</li>
<li class="toctree-l1"><a class="reference internal" href="patterns.html">The Inventory File, Patterns, and Groups</a><ul>
<li class="toctree-l2"><a class="reference internal" href="patterns.html#inventory-file-format">Inventory File Format</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns.html#selecting-targets">Selecting Targets</a></li>
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<li class="toctree-l2"><a class="reference internal" href="examples.html#managing-services">Managing Services</a></li>
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<li class="toctree-l2"><a class="reference internal" href="modules.html#facter">facter</a></li>
<li class="toctree-l2"><a class="reference internal" href="modules.html#git">git</a></li>
<li class="toctree-l2"><a class="reference internal" href="modules.html#ohai">ohai</a></li>
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<li class="toctree-l2"><a class="reference internal" href="modules.html#setup">setup</a></li>
<li class="toctree-l2"><a class="reference internal" href="modules.html#template">template</a></li>
<li class="toctree-l2"><a class="reference internal" href="modules.html#yum">yum</a></li>
<li class="toctree-l2"><a class="reference internal" href="modules.html#writing-your-own-modules">Writing your own modules</a></li>
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<li class="toctree-l2"><a class="reference internal" href="playbooks.html#playbook-example">Playbook Example</a></li>
<li class="toctree-l2"><a class="reference internal" href="playbooks.html#hosts-line">Hosts line</a></li>
<li class="toctree-l2"><a class="reference internal" href="playbooks.html#vars-section">Vars section</a></li>
<li class="toctree-l2"><a class="reference internal" href="playbooks.html#tasks-list">Tasks list</a></li>
<li class="toctree-l2"><a class="reference internal" href="playbooks.html#task-name-and-action">Task name and action</a></li>
<li class="toctree-l2"><a class="reference internal" href="playbooks.html#notify-statements">Notify statements</a></li>
<li class="toctree-l2"><a class="reference internal" href="playbooks.html#handlers">Handlers</a></li>
<li class="toctree-l2"><a class="reference internal" href="playbooks.html#includes">Includes</a></li>
<li class="toctree-l2"><a class="reference internal" href="playbooks.html#using-includes-to-assign-classes-of-systems">Using Includes To Assign Classes of Systems</a></li>
<li class="toctree-l2"><a class="reference internal" href="playbooks.html#asynchronous-actions-and-polling">Asynchronous Actions and Polling</a></li>
<li class="toctree-l2"><a class="reference internal" href="playbooks.html#executing-a-playbook">Executing A Playbook</a></li>
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<li class="toctree-l1"><a class="reference internal" href="api.html">Using the Python API</a><ul>
<li class="toctree-l2"><a class="reference internal" href="api.html#detailed-api-example">Detailed API Example</a></li>
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<li class="toctree-l1"><a class="reference internal" href="faq.html">Frequently Asked Questions</a><ul>
<li class="toctree-l2"><a class="reference internal" href="faq.html#what-inspired-ansible">What inspired Ansible?</a></li>
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<li class="toctree-l3"><a class="reference internal" href="faq.html#vs-func">vs Func?</a></li>
<li class="toctree-l3"><a class="reference internal" href="faq.html#vs-puppet">vs Puppet?</a></li>
<li class="toctree-l3"><a class="reference internal" href="faq.html#vs-chef">vs Chef?</a></li>
<li class="toctree-l3"><a class="reference internal" href="faq.html#vs-capistrano-fabric">vs Capistrano/Fabric?</a></li>
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<li class="toctree-l2"><a class="reference internal" href="faq.html#other-questions">Other Questions</a><ul>
<li class="toctree-l3"><a class="reference internal" href="faq.html#how-does-ansible-scale">How does Ansible scale?</a></li>
<li class="toctree-l3"><a class="reference internal" href="faq.html#are-transports-other-than-ssh-supported">Are transports other than SSH supported?</a></li>
<li class="toctree-l3"><a class="reference internal" href="faq.html#what-are-some-ideal-uses-for-ansible">What are some ideal uses for Ansible?</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="man.html">Man Pages</a><ul>
<li class="toctree-l2"><a class="reference internal" href="man.html#ansible-1">ansible(1)</a></li>
<li class="toctree-l2"><a class="reference internal" href="man.html#ansible-playbook-1">ansible-playbook(1)</a></li>
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<div class="section" id="about-the-author">
<h2>About the Author<a class="headerlink" href="#about-the-author" title="Permalink to this headline"></a></h2>
<p>Ansible was originally developed by <a class="reference external" href="http://michaeldehaan.net">Michael DeHaan</a> (<a class="reference external" href="http://twitter.com/#!/laserllama">&#64;laserllama</a>), a Raleigh, NC
based software developer and architect. He created other popular
DevOps programs such as <a class="reference external" href="http://cobbler.github.com/">Cobbler</a>, the popular Linux install server.
Cobbler is used to deploy mission critical systems all over the
planet, in industries ranging from massively multiplayer gaming, core
internet infrastructure, finance, chip design, and more. Michael also
helped co-author of <a class="reference external" href="http://fedorahosted.org/func/">Func</a>, a precursor to Ansible, which is used to
orchestrate systems in lots of diverse places. He&#8217;s worked on systems
software for IBM, Motorola, Red Hat&#8217;s Emerging Technologies Group,
Puppet Labs, and rPath. Reach Michael by email <a class="reference external" href="mailto:michael&#46;dehaan&#37;&#52;&#48;gmail&#46;com">here</a>.</p>
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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>ansible-modules</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-modules" lang="en"><a id="id467962"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ansible-modules — stock modules shipped with ansible</p></div><div class="refsect1" title="DESCRIPTION"><a id="_description"></a><h2>DESCRIPTION</h2><p>Ansible ships with a number of modules that can be executed directly on remote hosts or through
ansible playbooks.</p></div><div class="refsect1" title="IDEMPOTENCE"><a id="_idempotence"></a><h2>IDEMPOTENCE</h2><p>Most modules other than command are idempotent, meaning they will seek to avoid changes
unless a change needs to be made. When using ansible playbooks, these modules can
trigger change events, as described in <span class="strong"><strong>ansible-playbooks</strong></span>(5).</p><p>Unless otherwise noted, all modules support change hooks.</p></div><div class="refsect1" title="command"><a id="_command"></a><h2>command</h2><p>The command module takes the command name followed by a list of arguments, space delimited.
This is the only module that does not use key=value style parameters.</p><div class="variablelist"><dl><dt><span class="term">
Example usage
</span></dt><dd>
/sbin/shutdown -t now
</dd></dl></div><p>This module does not support change hooks.</p><p>Returns the return code from the program as well as timing information.</p><p>(Async command running and command execution time limits are in plan.)</p></div><div class="refsect1" title="copy"><a id="_copy"></a><h2>copy</h2><p>The copy module moves a file on the local box to remote locations.</p><div class="variablelist"><dl><dt><span class="term">
<span class="strong"><strong>src=</strong></span>
</span></dt><dd>
Local absolute path to a file to copy to the remote server
</dd><dt><span class="term">
<span class="strong"><strong>dest=</strong></span>
</span></dt><dd>
Remote absolute path where the file should end up
</dd></dl></div><p>This module also returns md5sum information about the resultant file.</p></div><div class="refsect1" title="facter"><a id="_facter"></a><h2>facter</h2><p>Runs the discovery program <span class="emphasis"><em>facter</em></span> on the remote system, returning
JSON data that can be useful for inventory purposes.</p><p>Requires that <span class="emphasis"><em>facter</em></span> and <span class="emphasis"><em>ruby-json</em></span> be installed on the remote end.</p><p>This module is informative only - it takes no parameters &amp; does not support change hooks,
nor does it make any changes on the system.</p></div><div class="refsect1" title="file"><a id="_file"></a><h2>file</h2><p>Ensures the ownership and permissions of files are as desired.</p><p>Use copy or template first if you need to make sure a file is on the box.</p><p>In plan.</p></div><div class="refsect1" title="git"><a id="_git"></a><h2>git</h2><p>Deploys software from git checkouts.</p><div class="variablelist"><dl><dt><span class="term">
<span class="strong"><strong>repo=</strong></span>
</span></dt><dd>
git or http protocol address of the repo to checkout
</dd><dt><span class="term">
<span class="strong"><strong>dest=</strong></span>
</span></dt><dd>
where to check it out, an absolute directory path
</dd><dt><span class="term">
<span class="strong"><strong>version=</strong></span>
</span></dt><dd>
what version to check out — either the git SHA, the literal string <span class="emphasis"><em>HEAD</em></span>, or a tag name
</dd></dl></div></div><div class="refsect1" title="ohai"><a id="_ohai"></a><h2>ohai</h2><p>Similar to the facter module, this returns JSON inventory data. Ohai
data is a bit more verbose and nested than facter.</p><p>Requires that <span class="emphasis"><em>ohai</em></span> be installed on the remote end.</p><p>This module is information only - it takes no parameters &amp; does not
support change hooks, nor does it make any changes on the system.</p></div><div class="refsect1" title="ping"><a id="_ping"></a><h2>ping</h2><p>A trivial test module, this module always returns the integer <span class="emphasis"><em>1</em></span> on
successful contact.</p><p>This module does not support change hooks.</p><p>This module is informative only - it takes no parameters &amp; does not
support change hooks, nor does it make any changes on the system.</p></div><div class="refsect1" title="service"><a id="_service"></a><h2>service</h2><p>Controls services on remote machines.</p><div class="variablelist"><dl><dt><span class="term">
<span class="strong"><strong>state=</strong></span>
</span></dt><dd>
Values are <span class="emphasis"><em>started</em></span>, <span class="emphasis"><em>stopped</em></span>, or <span class="emphasis"><em>restarted</em></span>. Started/stopped
are idempotent actions that will not run commands unless neccessary.
<span class="emphasis"><em>restarted</em></span> will always bounce the service
</dd><dt><span class="term">
<span class="strong"><strong>name=</strong></span>
</span></dt><dd>
The name of the service
</dd></dl></div></div><div class="refsect1" title="setup"><a id="_setup"></a><h2>setup</h2><p>Writes a JSON file containing key/value data, for use in templating.
Call this once before using the template modules, usually as the very
first step in your playbook.</p><p>If facter or ohai are installed, variables from these programs will also
be snapshotted into the JSON file for usage in templating. These variables
are prefixed with <span class="emphasis"><em>facter_</em></span> and 'ohai_" so it’s easy to tell their source.</p><div class="variablelist"><dl><dt><span class="term">
<span class="strong"><strong>metadata=</strong></span>
</span></dt><dd>
Optionally overrides the default JSON file location of /etc/ansible/setup.
If used, also supply the metadata parameter to <span class="emphasis"><em>template</em></span>. Change if
running as a non-root remote user who does not have permissions on /etc/ansible.
</dd><dt><span class="term">
<span class="strong"><strong>anything=</strong></span>
</span></dt><dd>
any other parameters can be named basically anything, and set a key=value
pair in the JSON file for use in templating.
</dd></dl></div></div><div class="refsect1" title="template"><a id="_template"></a><h2>template</h2><p>Templates a file out to a remote server. Call the setup module prior to usage.</p><div class="variablelist"><dl><dt><span class="term">
<span class="strong"><strong>src=</strong></span>
</span></dt><dd>
path of a Jinja2 formatted template on the local server
</dd><dt><span class="term">
<span class="strong"><strong>dest</strong></span>
</span></dt><dd>
location to render the template on the remote server
</dd><dt><span class="term">
<span class="strong"><strong>metadata</strong></span>
</span></dt><dd>
location of a JSON file to use to supply template data. Default is /etc/ansible/setup
which is the same as the default for the setup module. Change if running as a non-root
remote user who does not have permissions on /etc/ansible.
</dd></dl></div><p>This module also returns md5sum information about the resultant file.</p></div><div class="refsect1" title="user"><a id="_user"></a><h2>user</h2><p>This module is in plan.</p></div><div class="refsect1" title="yum"><a id="_yum"></a><h2>yum</h2><p>This module is in plan.</p></div><div class="refsect1" title="WRITING YOUR OWN MODULES"><a id="_writing_your_own_modules"></a><h2>WRITING YOUR OWN MODULES</h2><p>To write your own modules, simply follow the convention of those already available in
/usr/share/ansible. Modules must return JSON but can be written in any language.
To support change hooks, modules should return hashes, with a changed: True/False
element at the top level. Modules can also choose to indicate a failure scenario
by returning a top level <span class="emphasis"><em>failure</em></span> element with a True value.</p></div><div class="refsect1" title="ENVIRONMENT"><a id="_environment"></a><h2>ENVIRONMENT</h2><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="SEE ALSO"><a id="_see_also"></a><h2>SEE ALSO</h2><p><span class="strong"><strong>ansible</strong></span>(1)</p><p><span class="strong"><strong>ansible-playbook</strong></span>(5)</p><p>Ansible home page: <a class="ulink" href="https://github.com/mpdehaan/ansible/" target="_top">https://github.com/mpdehaan/ansible/</a></p></div></div></body></html>

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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>ansible-modules</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-modules" lang="en"><a id="id441065"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ansible-playbook — format and function of an ansible playbook file</p></div><div class="refsect1" title="DESCRIPTION"><a id="_description"></a><h2>DESCRIPTION</h2><p>Ansible ships with <span class="emphasis"><em>ansible-playbook</em></span>, a tool for running playbooks.
Playbooks can represent frequent tasks, desired system configurations,
or deployment processes.</p></div><div class="refsect1" title="FORMAT"><a id="_format"></a><h2>FORMAT</h2><p>Playbooks are written in YAML.</p></div><div class="refsect1" title="EXAMPLE"><a id="_example"></a><h2>EXAMPLE</h2><p>See:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
<a class="ulink" href="https://github.com/mpdehaan/ansible/blob/master/examples/playbook.yml" target="_top">https://github.com/mpdehaan/ansible/blob/master/examples/playbook.yml</a>
</li><li class="listitem">
<a class="ulink" href="https://github.com/mpdehaan/ansible/blob/master/examples/base.yml" target="_top">https://github.com/mpdehaan/ansible/blob/master/examples/base.yml</a>
</li><li class="listitem">
<a class="ulink" href="https://github.com/mpdehaan/ansible/blob/master/examples/handlers.yml" target="_top">https://github.com/mpdehaan/ansible/blob/master/examples/handlers.yml</a>
</li></ul></div></div><div class="refsect1" title="WHAT THE EXAMPLE MEANS"><a id="_what_the_example_means"></a><h2>WHAT THE EXAMPLE MEANS</h2><p>Here’s what playbook.yml (above) will do.</p><p>The first pattern will select all hosts. The patterns are the same
as supported by /usr/bin/ansible.</p><p>First, it will run all the modules specified in base.yml. Includes can
be used to implement classes of things, and if you wanted, a playbook
could consist of nothing but include files. This is an example of an
include.</p><p>After processing base.yml, on each host we’ll write for
a JSON file into /etc/ansible/setup on each remote system with the
values max_clients and http_port.</p><p>Next, we’ll use a Jinja2 template locally residing at
/srv/templates/httpd.j2 to write the Apache config file on each host,
using the previous values in that setup file.</p><p>Next, We’ll ensure that apache is running if stopped.</p><p>The template task set up a notifier, which means if the configuration
file actually changed, we have a named handler, in this case, <span class="emphasis"><em>restart apache</em></span>
to run. In this case, all the notifiers come from handlers.yml, though it’s
also ok to express handlers directly in the main yaml file too. Using
the include promotes reuse.</p><p>What does the handler say? If and only if the config file changed, note that we need to restart
apache at the end of the run, otherwise, don’t bother because we
already know it is running.</p></div><div class="refsect1" title="HIGH LEVEL EXPLANATION"><a id="_high_level_explanation"></a><h2>HIGH LEVEL EXPLANATION</h2><p>Playbooks are executed top down and can contain multiple references to
patterns. For instance, a playbook could do something to all
webservers, then do something to all database servers, then do
something different to all webservers again.</p><p>For each pattern, the tasks in the <span class="emphasis"><em>tasks</em></span> list are executed in order
for all hosts in the host file matching the pattern.</p><p>For each task, a name/action pair describes what the task is and what
ansible module to use to accomplish the task, along with any
arguments. Additional fields like <span class="emphasis"><em>comment:</em></span> can be added and will
be ignored, so feel free to take notes in the file.</p><p>Most modules accept key=value format arguments.</p><p>Handlers are like tasks, but are conditionally executed. If a module
reports a <span class="emphasis"><em>change</em></span>, it can notify one or more handler by name. If
notified, it will run only for hosts that changed.</p></div><div class="refsect1" title="ERROR HANDLING"><a id="_error_handling"></a><h2>ERROR HANDLING</h2><p>If a host has a failure, the host will be ignored for the remainder
of the playbook execution.</p></div><div class="refsect1" title="ENVIRONMENT"><a id="_environment"></a><h2>ENVIRONMENT</h2><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="SEE ALSO"><a id="_see_also"></a><h2>SEE ALSO</h2><p><span class="strong"><strong>ansible</strong></span>(1)</p><p><span class="strong"><strong>ansible-modules</strong></span>(5)</p><p>Ansible home page: <a class="ulink" href="https://github.com/mpdehaan/ansible/" target="_top">https://github.com/mpdehaan/ansible/</a></p></div></div></body></html>

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<div class="section" id="introducing-ansible">
<h1>Introducing Ansible<a class="headerlink" href="#introducing-ansible" title="Permalink to this headline"></a></h1>
<p>Ansible is a radically simple deployment, configuration, and command
execution framework. Other tools in this space have been too
complicated for too long, require too much bootstrapping, and have too
much learning curve. Ansible is dead simple and painless to extend.
For comparison, Puppet and Chef have about 60k lines of code.
Ansible&#8217;s core is a little over 1000 lines.</p>
<p>Ansible isn&#8217;t just for configuration &#8211; it&#8217;s also great for Ad-Hoc
tasks, quickly firing off commands against nodes. Where Ansible
excels though, is expressing complex multi-node deployment processes,
executing complex sequences of commands on different hosts through
<a class="reference internal" href="playbooks.html"><em>Playbooks</em></a>.</p>
<p>Extending ansible does not require programming in any particular
language &#8211; you can write modules as scripts or programs that return
simple JSON. It&#8217;s also trivially easy to just execute useful shell
commands.</p>
<p>Why use Ansible versus something else? (Puppet, Chef, Fabric,
Capistrano, mCollective, Func, SaltStack, etc?) Ansible will have far
less code, it will be (by extension) more correct, and it will be the
easiest thing to hack on and use you&#8217;ll ever see &#8211; regardless of your
favorite language of choice.</p>
<p>Systems management doesn&#8217;t have to be complicated. Ansible&#8217;s docs
will remain short &amp; simple, and the source will be blindingly obvious.</p>
<div class="section" id="architecture">
<h2>Architecture<a class="headerlink" href="#architecture" title="Permalink to this headline"></a></h2>
<img alt="&quot;Architecture Diagram&quot;" src="http://ansible.github.com/ansible_arch.jpg" style="width: 648px; height: 464px;" />
</div>
<div class="section" id="design-goals">
<h2>Design Goals<a class="headerlink" href="#design-goals" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li>Dead simple setup</li>
<li>Super fast &amp; parallel by default</li>
<li>No server or client daemons; use existing SSHd out of the box</li>
<li>No additional software required on client boxes</li>
<li>Modules can be written in ANY language</li>
<li>Awesome API for creating very powerful distributed scripts</li>
<li>Be very usable as non-root</li>
<li>Create the easiest config management system to use, ever.</li>
</ul>
</div>
<div class="section" id="resources">
<h2>Resources<a class="headerlink" href="#resources" title="Permalink to this headline"></a></h2>
<p>Your ideas and contributions are welcome. We&#8217;re also happy to help
you with questions about Ansible.</p>
<ul class="simple">
<li>Join the <a class="reference external" href="http://groups.google.com/group/ansible-project">ansible-project mailing list</a> on Google Groups</li>
<li>Join <a class="reference external" href="irc://irc.freenode.net/#ansible">#ansible</a> on the <a class="reference external" href="http://freenode.net/">freenode IRC network</a></li>
<li>Visit the <a class="reference external" href="https://github.com/ansible/ansible">project page</a> on Github<ul>
<li>View the <a class="reference external" href="https://github.com/ansible/ansible/issues">issue tracker</a></li>
</ul>
</li>
</ul>
</div>
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<div class="section" id="contents">
<h1>Contents<a class="headerlink" href="#contents" title="Permalink to this headline"></a></h1>
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<div class="section" id="about-the-author">
<h2>About the Author<a class="headerlink" href="#about-the-author" title="Permalink to this headline"></a></h2>
<p>Ansible was originally developed by <a class="reference external" href="http://michaeldehaan.net">Michael DeHaan</a> (<a class="reference external" href="http://twitter.com/#!/laserllama">&#64;laserllama</a>), a Raleigh, NC
based software developer and architect. He created other popular
DevOps programs such as <a class="reference external" href="http://cobbler.github.com/">Cobbler</a>, the popular Linux install server.
Cobbler is used to deploy mission critical systems all over the
planet, in industries ranging from massively multiplayer gaming, core
internet infrastructure, finance, chip design, and more. Michael also
helped co-author of <a class="reference external" href="http://fedorahosted.org/func/">Func</a>, a precursor to Ansible, which is used to
orchestrate systems in lots of diverse places. He&#8217;s worked on systems
software for IBM, Motorola, Red Hat&#8217;s Emerging Technologies Group,
Puppet Labs, and rPath. Reach Michael by email <a class="reference external" href="mailto:michael&#46;dehaan&#37;&#52;&#48;gmail&#46;com">here</a>.</p>
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<?xml version="1.0" encoding="UTF-8"?> <?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"> <!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="id322452"></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 &lt;filename.yml&gt; … [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 <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="id458439"></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 &lt;filename.yml&gt; … [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"> 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 class="strong"><strong>filename.yml</strong></span>
</span></dt><dd> </span></dt><dd>

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<?xml version="1.0" encoding="UTF-8"?> <?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"> <!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</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" lang="en"><a id="id394199"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ansible — run a command somewhere else</p></div><div class="refsynopsisdiv" title="Synopsis"><a id="_synopsis"></a><h2>Synopsis</h2><p>ansible &lt;host-pattern&gt; [-f forks] [-m module_name] [-a args]</p></div><div class="refsect1" title="DESCRIPTION"><a id="_description"></a><h2>DESCRIPTION</h2><p><span class="strong"><strong>Ansible</strong></span> is an extra-simple tool/framework/API for doing 'remote things' over <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>ansible</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" lang="en"><a id="id580533"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ansible — run a command somewhere else</p></div><div class="refsynopsisdiv" title="Synopsis"><a id="_synopsis"></a><h2>Synopsis</h2><p>ansible &lt;host-pattern&gt; [-f forks] [-m module_name] [-a args]</p></div><div class="refsect1" title="DESCRIPTION"><a id="_description"></a><h2>DESCRIPTION</h2><p><span class="strong"><strong>Ansible</strong></span> is an extra-simple tool/framework/API for doing 'remote things' over
SSH.</p></div><div class="refsect1" title="ARGUMENTS"><a id="_arguments"></a><h2>ARGUMENTS</h2><div class="variablelist"><dl><dt><span class="term"> SSH.</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>host-pattern</strong></span> <span class="strong"><strong>host-pattern</strong></span>
</span></dt><dd> </span></dt><dd>

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.. image:: http://ansible.github.com/html/mpd_rings.jpg .. image:: http://ansible.github.com/mpd_rings.jpg
:height: 225 :height: 225
:width: 300 :width: 300
:alt: "" :alt: ""
:target: http://photos.michaeldehaan.net/infrared/h3d850bdf#h3d850bdf :target: http://photos.michaeldehaan.net/infrared/h3d850bdf#h3d850bdf
.. image:: http://ansible.github.com/html/mpd_tunnel.jpg .. image:: http://ansible.github.com/mpd_tunnel.jpg
:height: 225 :height: 225
:width: 337 :width: 337
:alt: "" :alt: ""
:target: http://photos.michaeldehaan.net/favorites/h2428aca7#h2428aca7 :target: http://photos.michaeldehaan.net/favorites/h2428aca7#h2428aca7
.. image:: http://ansible.github.com/html/mpd_tubes.jpg .. image:: http://ansible.github.com/mpd_tubes.jpg
:height: 225 :height: 225
:width: 225 :width: 225
:alt: "" :alt: ""
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Architecture Architecture
```````````` ````````````
.. image:: http://ansible.github.com/html/ansible_arch.jpg .. image:: http://ansible.github.com/ansible_arch.jpg
:alt: "Architecture Diagram" :alt: "Architecture Diagram"
:width: 648 :width: 648
:height: 464 :height: 464

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