Best way to learn Ansible and the whole idea of automation is to start from the small playbooks and then grow big. If you first automate simple tasks, even those that may be easier and quicker to perform from the command line, you will learn how Ansible is working. Let’s say, we want to test if SNMP is responding on the remote host (we name it HostA). We will use SNMPv3 and authPriv security model. And of course, we want to write the Ansible playbook and run it on server HostNOC.
Ansible is one of the powerful tools providing us an automation of recurring tasks. In the current world, it is impossible to manage infrastructure manually efficiently. Many people still do this but the world has already changed and we need to progress otherwise our business will be cost ineffective. You can provide static inventory – list of the devices where you want to execute the playbook. But in dynamic environments, such as Cisco VIRL simulations you don’t want to edit inventory file manually. That is why I use Python script that will generate Dynamic VIRL inventory for Ansible playbook for me.