10-package-management.md

Ansible Use Case: Package Management Across Environments

Overview

This lab demonstrates how to use an Ansible playbook to install required packages (curl and git) on a remote server. It ensures idempotent execution and highlights package management automation.

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Project Structure

.
├── hosts.ini
└── install_packages.yml

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Implementation Steps

1. Create Inventory File

vi hosts.ini

[webservers]
server1 ansible_user=server1_admin ansible_ssh_pass='server1_admin@123!' ansible_become=true ansible_become_pass='server1_admin@123!'

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2. Create Playbook

vi install_packages.yml

---
- name: Install curl and git on server1
  hosts: server1
  become: true

  tasks:
    - name: Update apt cache
      apt:
        update_cache: yes
        cache_valid_time: 3600

    - name: Install curl and git
      apt:
        name:
          - curl
          - git
        state: present

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3. Run Playbook

ansible-playbook -i hosts.ini install_packages.yml

Executes the playbook and installs required packages on server1.

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Key Concepts

• Playbook-based package management
• Installing multiple packages using apt
• Idempotent execution (state: present)
• Privilege escalation using become

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Summary

This lab demonstrates how Ansible can automate package installation across servers, ensuring required tools are installed only when needed.