tower_viewinv.py

import requests
import json
import sys
import logging
import click

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(levelname)s - %(message)s'
)

def get_inventory_extravars(tower_url, token, inventory_name):
    """
    Connect to Ansible Tower and retrieve extra_vars of a specific inventory.

    :param tower_url: URL of the Ansible Tower instance
    :param token: Ansible Tower authentication token
    :param inventory_name: Name of the inventory to look up
    :return: Extra variables as a dictionary
    """
    headers = {
        "Authorization": f"Bearer {token}",
        "Content-Type": "application/json"
    }

    try:
        # Fetch the list of inventories
        response = requests.get(f"{tower_url}/api/v2/inventories/", headers=headers)
        response.raise_for_status()
        inventories = response.json()

        # Find the inventory by name
        inventory = next((inv for inv in inventories["results"] if inv["name"] == inventory_name), None)

        if not inventory:
            logging.error(f"Inventory '{inventory_name}' not found.")
            sys.exit(1)

        # Fetch details of the inventory
        inventory_id = inventory["id"]
        response = requests.get(f"{tower_url}/api/v2/inventories/{inventory_id}/", headers=headers)
        response.raise_for_status()
        inventory_details = response.json()

        # Extract and return extra_vars
        extra_vars = inventory_details.get("variables", "")
        if extra_vars:
            return json.loads(extra_vars)
        else:
            logging.warning("No extra_vars found for the inventory.")
            return {}

    except requests.exceptions.RequestException as e:
        logging.error(f"Failed to connect to Ansible Tower: {e}")
        sys.exit(1)
    except json.JSONDecodeError:
        logging.error("Failed to parse extra_vars as JSON.")
        sys.exit(1)

@click.command()
@click.option('--tower-url', required=True, help='URL of the Ansible Tower instance')
@click.option('--token', required=True, help='Ansible Tower authentication token')
@click.option('--inventory-name', required=True, help='Name of the inventory to look up')
def main(tower_url, token, inventory_name):
    """
    CLI to retrieve extra_vars of a specific inventory from Ansible Tower.
    """
    extra_vars = get_inventory_extravars(tower_url, token, inventory_name)
    logging.info(f"Extra variables for inventory '{inventory_name}':")
    print(json.dumps(extra_vars, indent=4))

if __name__ == "__main__":
    main()