What is Ansible Inventory

What is Ansible Inventory

Inventory , Adhoc Commands


2 min read

It is a file, define the collection of hosts (remote system) and group of hosts upon which Ansible commands , module, playbook operates.

Types of inventory :

Static Inventory: A simple list of hosts and groups defined in a file (usually in INI or YAML format)

inventory.ini [inventory file , you can write it using yml format also]





server_1 ansible_host=



ansible_python_interpreter=/usr/bin/python3 ansible_ssh_private_key_file=/home/soumen321/pem-key/test-new.pem

Dynamic Inventory: It is generated by a script or external programs that dynamically retrieve the list of hosts from external sources, whaere the hosts constantly changing (e.g cloud environment)

Using a pythone script and aws boto3 module , get the running hosts (ec2 instances i.e manage node) , list of host ips, ans store it in a inventory file.

Example in github.

Ansible inventories are fundamental for managing the scope of automation tasks. Whether using a static inventory for a small, stable set of hosts or a dynamic inventory for more complex, fluid environments, understanding and properly configuring your inventory is crucial for effective automation with Ansible.

Adhoc Commands UseCase

  1. Ping all hosts:

    ansible -i inventory.ini -m ping all

  2. Gather Facts from All Hosts

    ansible all -m setup

  3. Install a Package

    ansible -i inventory.ini -m shell -a "sudo apt install openjdk-17-jre-headless -y" all

    ansible web -m yum -a "name=httpd state=present"

  4. Start a Service

    ansible web -m service -a "name=httpd state=started"

  5. Copy a File to All Hosts

    ansible web -m copy -a "src=/path/to/local/file dest=/path/to/remote/file"

  6. Execute a Command on All Hosts

    ansible web -a "uptime"

  7. Create a User

    ansible web -m user -a "name=johndoe state=present"

Github :


Special Thanks to Abhishek Veeramalla
Youtube : https://www.youtube.com/Abhishek Veeramalla