Series

Ansible

An Ansible learning series covering automation, configuration management, playbooks, inventory, roles, variables, modules, Ansible Vault, and real world DevOps practices with practical hands-on explanations.

You Have 400 Servers to Configure. Now What? Let Ansible Do the Work.
Picture this. You have four EC2 instances running in your AWS account, and someone asks you to install Apache on all four of them. What do you do? The obvious answer most people go with is SSH into each machine, run the install command, repeat. Simple enough when it is four servers. But what happens when it is forty? Or four hundred? In a real enterprise environment, that number is not exaggerated at all. That is exactly the problem that Ansible was built to solve. And once you understand what it does and how it thinks, you will wonder how anyone managed large infrastructure without it.
Jun 18, 202612 min read4
Ansible Playbooks Explained: From First YAML File to Managing Real Servers
If you have already run a few Ansible ad hoc commands and seen how they work, you already understand the core idea: one command, many servers. But ad hoc commands only take you so far. When you need to install software, start services, create users, copy files, and print confirmation messages, all in one automated run across multiple servers, that is when you move to playbooks. Playbooks are where Ansible truly earns its place in a DevOps workflow. Everything you do in Ansible at scale, you do through playbooks.
Jun 19, 202613 min read3
Stop Writing Repetitive Playbooks: Ansible Tags, Variables, Loops, Handlers and Conditions Decoded
Once you have written your first few Ansible playbooks, installed some packages, and started a couple of services, a natural question comes up: what else can Ansible do? The answer is quite a lot. This article walks through six features that turn a basic Ansible setup into something genuinely powerful: the Setup module, Tags, Variables, Loops, Handlers, and Conditional tasks. Each one builds on what you already know, and together they give you the tools to manage complex, real-world server environments cleanly and efficiently. Before going further, the environment being used here has one Ansible master and multiple worker nodes. Two are grouped as prod and two as dev inside /etc/ansible/hosts. SSH key-based authentication is already configured between the master and all worker nodes. If any of that is not set up yet, revisit passwordless SSH setup and inventory configuration before continuing.
Jun 21, 202615 min read

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