How To Create and Use Templates in Ansible Playbooks

**How To Create and Use Templates in Ansible Playbooks**

Introduction Maintaining a separate config file per server or environment is the problem Ansible templates are designed to eliminate. By the end of this guide you will have built an Nginx landing page and an Nginx server block from Jinja2 templates, deployed them with the Ansible Template Module, and verified both with curl and service checks. Key Takeaways If the template task reports success but the service behavior does not change, the service almost certainly needs a handler-triggered reload or restart; the rendered file alone is not enough. A single undefined variable in a template fails the entire playbook as soon as a host (or new inventory group) does not define that variable; use | default(...) for any value that might be missing. When you run the play with become: yes, the template module writes files as root, so ownership is root unless you set owner/group on the task or in a follow-up step; Nginx on Ubuntu reads files owned by root, so this is fine for the paths used here...

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