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Spellcheck. Formatting. References.

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@ -25,25 +25,37 @@ Let's use ansible's command line tool to reboot all web servers in Atlanta, 10 a
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'.
.. note::
Note that other than the :ref:`command` module, ansible modules do
not work like simple scripts. They make the remote system look like
you state, and run the commands necessary to get it there. This
is commonly referred to as 'idempotent'.
File Transfer & Templating
``````````````````````````
Ansible can SCP lots of files to multiple machines in parallel, and optionally use them as template sources.
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.::
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.
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
`````````````````````````````
@ -52,7 +64,10 @@ 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.
Since ansible modules can notify change handlers (see
:doc:`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
`````````````````
@ -68,14 +83,19 @@ Alternatively, restart a service on all webservers::
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.::
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.
Any module other than :ref:`copy` or :ref:`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.
After the time limit (in seconds) runs out (``-B``), the process on
the remote nodes will be killed.