66 lines
3.3 KiB
Groff
66 lines
3.3 KiB
Groff
'\" t
|
|
.\" Title: ansible-modules
|
|
.\" Author: [see the "AUTHOR" section]
|
|
.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
|
|
.\" Date: 02/27/2012
|
|
.\" Manual: System administration commands
|
|
.\" Source: Ansible-playbook 0.0.1
|
|
.\" Language: English
|
|
.\"
|
|
.TH "ANSIBLE\-MODULES" "5" "02/27/2012" "Ansible\-playbook 0\&.0\&.1" "System administration commands"
|
|
.\" -----------------------------------------------------------------
|
|
.\" * set default formatting
|
|
.\" -----------------------------------------------------------------
|
|
.\" disable hyphenation
|
|
.nh
|
|
.\" disable justification (adjust text to left margin only)
|
|
.ad l
|
|
.\" -----------------------------------------------------------------
|
|
.\" * MAIN CONTENT STARTS HERE *
|
|
.\" -----------------------------------------------------------------
|
|
.SH "NAME"
|
|
ansible-playbook \- format and function of an ansible playbook file
|
|
.SH "DESCRIPTION"
|
|
.sp
|
|
Ansible ships with a ansible\-playbook tool for running playbooks\&. Playbooks can represent frequent tasks, desired system configurations, or deployment processes\&.
|
|
.SH "FORMAT"
|
|
.sp
|
|
Playbooks are currently writeable in YAML\&. Other formats (JSON?) may be supported in the future\&.
|
|
.SH "EXAMPLE"
|
|
.sp
|
|
see https://github\&.com/mpdehaan/ansible/blob/master/examples/playbook\&.yml
|
|
.SH "WHAT THE EXAMPLE MEANS"
|
|
.sp
|
|
Here\(cqs what the above example will do\&.
|
|
.sp
|
|
For all hosts in /etc/ansible/hosts (one host per line) that are named \fIwebserver\-anything\fR, first write a JSON file into /etc/ansible/setup on each remote system with the values max_clients and http_port\&.
|
|
.sp
|
|
Next, use a Jinja2 template locally residing at /srv/templates/httpd\&.j2 to write the Apache config file on each host to the path /etc/httpd/conf, using the previous values\&.
|
|
.sp
|
|
We\(cqll ensure that apache is running if stopped\&.
|
|
.sp
|
|
If and only if the config file changed, note that we need to restart apache at the end of the run, otherwise, don\(cqt bother because we already know it is running\&.
|
|
.SH "HIGH LEVEL EXPLANATION"
|
|
.sp
|
|
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\&.
|
|
.sp
|
|
For each pattern, the tasks in the \fItasks\fR list are executed in order for all hosts in the host file matching the pattern\&.
|
|
.sp
|
|
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 \fIcomment:\fR can be added and will be ignored, so feel free to take notes in the file\&.
|
|
.sp
|
|
Most modules accept key=value format arguments\&.
|
|
.sp
|
|
Handlers are like tasks, but are conditionally executed\&. If a module reports a \fIchange\fR, it can notify one or more handler by name\&. If notified, it will run only for hosts that changed\&.
|
|
.SH "ERROR HANDLING"
|
|
.sp
|
|
If a host has a failure, the host will be ignored for the remainder of the playbook execution\&.
|
|
.SH "AUTHOR"
|
|
.sp
|
|
Ansible was originally written by Michael DeHaan\&. See the AUTHORS file for a complete list of contributors\&.
|
|
.SH "SEE ALSO"
|
|
.sp
|
|
\fBansible\fR(1)
|
|
.sp
|
|
\fBansible\-playbook\fR(5) \- pending
|
|
.sp
|
|
Ansible home page: https://github\&.com/mpdehaan/ansible/
|