Ansible/Group by Distribution - Revision history

Admin at 19:19, 13 November 2018

2018-11-13T19:19:15Z

← Older revision		Revision as of 19:19, 13 November 2018
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	</pre>		</pre>

	(Note that this first defines the include file containing variables, then runs a simple debug task that prints the value of the variable asdf.		(Note that this first defines the include file containing variables, then runs a simple debug task that prints the value of the variable asdf.)

			==Flags==

			{{AnsibleFlag}}

Admin at 19:18, 13 November 2018

2018-11-13T19:18:58Z

← Older revision		Revision as of 19:18, 13 November 2018
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	- # tasks that only happen on CentOS go here		- # tasks that only happen on CentOS go here
	</pre>		</pre>

			Now you can define tasks that are specific to an operating system, by limiting the hosts attribute of the task.

			Further, you can also apply grup-specific settinggs for different operating systems:

			<pre>
			---
			# file: group_vars/all
			asdf: 10

			---
			# file: group_vars/os_CentOS
			asdf: 42
			</pre>

			If variables are the only thing you need, you can define the variables in the files as above, and then just define the variables file name based on the OS distribution:

			<pre>
			- hosts: all
			tasks:
			- name: Set OS distribution dependant variables
			include_vars: "os_{{ ansible_facts['distribution'] }}.yml"
			- debug:
			var: asdf
			</pre>

			(Note that this first defines the include file containing variables, then runs a simple debug task that prints the value of the variable asdf.

Admin: Created page with "It is useful to group machines by distribution, and it is possible to define these groups without explicitly doing so in the inventory file. The following example playbook us..."

2018-11-13T19:16:34Z

Created page with "It is useful to group machines by distribution, and it is possible to define these groups without explicitly doing so in the inventory file. The following example playbook us..."

New page

It is useful to group machines by distribution, and it is possible to define these groups without explicitly doing so in the inventory file.

The following example playbook uses a group_by keyword and sets the group by key to the operating system distribution.

<pre>
- name: talk to all hosts just so we can learn about them
hosts: all
tasks:
- name: Classify hosts depending on their OS distribution
group_by:
key: os_{{ ansible_facts['distribution'] }}

# now just on the CentOS hosts...

- hosts: os_CentOS
gather_facts: False
tasks:
- # tasks that only happen on CentOS go here
</pre>