What is Ansible?

What is Ansible?

Ansible is an open-source automation tool for configuring servers, installing packages, managing services, and deploying applications. Its main operational advantage is that it does not require a persistent agent on target machines; it usually connects to Linux servers over SSH and Windows systems over WinRM.

Ansible tasks are written as YAML playbooks. A playbook describes the desired state: Nginx should be installed, a config file should contain this template, or a service should be running. Modules apply that state, and many tasks are idempotent, meaning repeated runs should not create unnecessary changes.

Core Components

• Inventory: The list of managed hosts and groups
• Playbook: The file describing which tasks run on which hosts
• Module: A reusable unit that manages packages, files, services, users, or cloud resources
• Role: A reusable structure for tasks, variables, templates, and handlers

Business Use

Ansible is used for security patch rollout, Nginx/Apache setup, user management, application releases, and environment preparation. Terraform often creates the infrastructure, while Ansible configures what runs inside it. Connected to a CI/CD pipeline, deployment steps become repeatable and auditable instead of manual shell sessions.

For larger playbooks, teams should plan variable structure and secret handling with Ansible Vault or an external secret manager.