Hello everyone 
Since my colleagues, friends, and I primarily work on Linux hosts, we often need to extract or verify the data collected by sar.
While exploring the existing Ansible modules in ansible.builtin and community.general, I noticed that there is currently no facts module capable of extracting this data.
To address this, I am developing a new module called sar_facts, which retrieves data collected by sar and generates a structured dictionary within ansible_facts.
Current selectable data categories:
CPULoad AverageMemorySwapNetworkDisk
Available parameters:
| parameter | type | required | choices | default | description |
|---|---|---|---|---|---|
| type | str | true | CPU, Load, Memory, Swap, Network, Disk | ND | collection category |
| date_start | str | false | ND | None | collection start date |
| date_end | str | false | ND | None | collection end date |
| average | bool | false | true,false | false | get only average data |
| partition | bool | false | true,false | false | get Disk data by partition |
The module produces a dictionary with the following structure:
"ansible_facts.sar_data": {
"TYPE": {
"DATE": {
"TIME": {
"key": "value"
}
}
}
}
DATE and TIME are repeated for each collected day and hour.
Here’s an example of a task to extract disk data from 06/02/2025, to 07/02/2025, in partition mode:
- name: collect disk data
sar_facts:
type: "Disk"
partition: true
date_start: "06/02/2025"
date_end: "07/02/2025"
The ease of data extraction comes at the cost of the effort required to filter it and obtain specific information. 
For example, to retrieve the list of await values for the specific volume centos-root, you would need to do the following:
- name: Extract all await values for centos-root
set_fact:
root_await: >-
{{ ansible_facts.sar_data.Disk
| dict2items
| map(attribute='value')
| map('dict2items')
| list | sum(start=[])
| selectattr('value', 'defined')
| map(attribute='value')
| list | sum(start=[])
| selectattr('DEV', 'equalto', 'centos-root')
| map(attribute='await')
| list
}}
This module is still a work in progress and has not yet been published on GitHub.
The question is: would it actually be useful to Ansible users?
Would it be worth adding to ansible-core or community.general?