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anta/docs/cli/inv-from-ansible.md

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<!--
~ Copyright (c) 2023-2024 Arista Networks, Inc.
~ Use of this source code is governed by the Apache License 2.0
~ that can be found in the LICENSE file.
-->
# Create an Inventory from Ansible inventory
In large setups, it might be beneficial to construct your inventory based on your Ansible inventory. The `from-ansible` entrypoint of the `get` command enables the user to create an ANTA inventory from Ansible.
### Command overview
```bash
$ anta get from-ansible --help
Usage: anta get from-ansible [OPTIONS]
Build ANTA inventory from an ansible inventory YAML file
Options:
-g, --ansible-group TEXT Ansible group to filter
--ansible-inventory FILENAME
Path to your ansible inventory file to read
-o, --output FILENAME Path to save inventory file
-d, --inventory-directory PATH Directory to save inventory file
--help Show this message and exit.
```
The output is an inventory where the name of the container is added as a tag for each host:
```yaml
anta_inventory:
hosts:
- host: 10.73.252.41
name: srv-pod01
- host: 10.73.252.42
name: srv-pod02
- host: 10.73.252.43
name: srv-pod03
```
!!! warning
The current implementation only considers devices directly attached to a specific Ansible group and does not support inheritance when using the `--ansible-group` option.
By default, if user does not provide `--output` file, anta will save output to configured anta inventory (`anta --inventory`). If the output file has content, anta will ask user to overwrite when running in interactive console. This mechanism can be controlled by triggers in case of CI usage: `--overwrite` to force anta to overwrite file. If not set, anta will exit
### Command output
`host` value is coming from the `ansible_host` key in your inventory while `name` is the name you defined for your host. Below is an ansible inventory example used to generate previous inventory:
```yaml
---
tooling:
children:
endpoints:
hosts:
srv-pod01:
ansible_httpapi_port: 9023
ansible_port: 9023
ansible_host: 10.73.252.41
type: endpoint
srv-pod02:
ansible_httpapi_port: 9024
ansible_port: 9024
ansible_host: 10.73.252.42
type: endpoint
srv-pod03:
ansible_httpapi_port: 9025
ansible_port: 9025
ansible_host: 10.73.252.43
type: endpoint
```