Ansible Tutorial with Examples.
Ansible tutorial for IT automation: playbooks, roles, inventories, modules and configuration management at scale.
Beginner
Start here — no prior experience needed
Ansible Idempotency, Verified: Run It Twice and Watch changed=0
Ansible's whole pitch is idempotency — running a playbook twice should only change things the first time. Verify that claim by actually running one twice, then break it on purpose with a shell task.
Variable Precedence: host_vars Beats group_vars, and extra-vars Beats Everything
The same variable name, defined in three places, resolves to three different values depending on where you look — verified by actually stacking group_vars, host_vars, and -e against each other.
Intermediate
For developers with core concepts down
Roles and Handlers: notify Only Fires on changed, Never on ok
ansible-galaxy init scaffolds a real role directory. Wire a handler to a config-writing task with notify, and watch it disappear from the run entirely the moment the task reports ok instead of changed.
Loops, Conditionals, and block/rescue: Reading the Real Recap Numbers
A loop over 3 items reports changed=1, not 3 — the recap counts hosts, not items. Plus when-conditionals that skip, and block/rescue/always catching a bug.
Advanced
Production-grade patterns for experienced engineers
Gating a Pipeline on ansible-playbook's Exit Code, Not Its Output
A CI step doesn't parse PLAY RECAP text, it reads $?. See what --syntax-check, --check --diff, and a failing task really return, and gate on that.
Check Mode's Blind Spot: command Skips, copy Simulates, check_mode: false Writes Anyway
A --check dry run isn't uniform: command tasks skip, copy safely simulates changed, and check_mode: false writes for real. Verified against real files.
Also part of Ansible
Taught in other topics. Each link opens the lesson in its home topic.