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Chapter 11: Ansible Introduction

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Chala mitrano, aaj aapan Ansible — config management. Vis playbooks ne 20 identical lab servers uthavuya. Inventory, modules, playbooks, idempotence, ad-hoc ping / package / copy / service, simple role layout, aani Bash vs Ansible. Nginx deep hosting AWS course madhe — ithe fakt example target. Ghabru naka: ek playbook ne Nginx + badge API index.

What you will learn in this chapter

  • Inventory, modules, playbooks, idempotence
  • Ad-hoc ping, package, copy, service
  • Simple role folder layout
  • Configure a web welcome page without rewriting AWS chapters
  • When Ansible beats raw shell scripts

Concepts in this chapter

  1. 11.1Why Ansible — one playbook for many servers
  2. 11.2Inventory — who are we configuring?
  3. 11.3Modules and ad-hoc commands
  4. 11.4Idempotence — run twice, safe result
  5. 11.5Playbook — Nginx welcome for badge API
  6. 11.6Handlers — restart only when needed
  7. 11.7Simple role folder layout
  8. 11.8Variables, vault awareness and secrets
  9. 11.9Ansible vs shell scripts — choose deliberately
  10. 11.10Troubleshooting table
  11. 11.11Git layout for Ansible labs
  12. 11.12Lab — playbook installs Nginx welcome
  13. 11.13What good looks like after this chapter

Review and practice

  1. ★11.5b ansible.cfg for friendlier labs
  2. ★11.9b Check mode and diff
  3. ★11.9c Tags — run part of a playbook
  4. ★11.9d Dynamic inventory (awareness)
  5. ★11.10b Limit and serial (awareness)

The chapter recap is at the end of the last concept page.