ansible-inventory

Organize hosts and groups in Ansible inventory by creating INI or YAML format files that define hosts, assign them to groups, and set host and group variables. This structure enables you to manage infrastructure across multiple environments and apply configurations reliably through playbooks.

INI format uses flat syntax for hosts, groups, and variables in a simple text file, while YAML format supports nested group hierarchies and complex variable structures. YAML is better for intricate multi-environment deployments with deep group nesting.

Define host variables to apply settings to individual hosts and group variables to apply settings across all hosts in a group. Both types are inherited through the group hierarchy, reducing duplication and simplifying playbook logic.

Yes, Ansible inventory supports numeric host ranges and pattern syntax to define multiple similar hosts compactly. For example, web[01:10].example.com generates ten hosts without listing each one individually.

Dynamic inventory scripts parse infrastructure data and output JSON-formatted host and group definitions to stdout. This approach lets you pull live inventory from cloud providers, APIs, or databases instead of maintaining static files.

Validating inventory syntax and structure catches misconfigurations early, preventing playbook failures across large deployments. A parser script can verify host definitions, group hierarchies, and variable scoping to ensure reliable automation.