Terraform and Ansible Project for Infrastructure and Configuration Management

Overview

This project provides Terraform configurations to create AWS EC2 instances for Ansible practice and sample Ansible playbooks to perform common tasks on these instances.

Terraform Files

• main.tf: Creates EC2 instances with Amazon Linux 2023 and Ubuntu 22.04, along with a security group allowing SSH (22) and HTTP (80) connections.
• variables.tf: Defines variables for instance tags, key name, user, AMIs, instance type, and AWS credentials.
• inventory.txt: Specifies the Ansible inventory with groups and variables.
• ansible.cfg: Configuration file for Ansible settings.

Ansible Playbooks

• install_docker.yml: Installs and configures Docker on servers.
• setup_web_server.yml: Sets up a web server using Apache.
• create_user.yml: Creates a user on servers.
• install_nginx.yml: Installs and configures Nginx.
• install_mysql.yml: Installs and configures MySQL.
• install_python.yml: Installs Python and pip on servers.

Prerequisites

• Terraform installed
• AWS CLI configured with appropriate credentials
• Ansible installed
• SSH key pair created and added to the AWS account

Usage

Step 1: Terraform Setup

1. Initialize Terraform

   terraform init 
   terraform apply
   

Step 2: Ansible Setup

Update Inventory File

Ensure the inventory.txt file contains the correct private IP addresses of the created EC2 instances.

Update Ansible Configuration

Make sure ansible.cfg is correctly configured.

Step 3: Running Ansible Playbooks Connectivity Test

ansible-playbook connectivity-test-playbook.yaml

Install Docker

ansible-playbook install_docker.yaml

Copy File

ansible-playbook copyfile-playbook.yaml

Create a User

ansible-playbook create_user.yaml

Install and Configure Nginx

ansible-playbook install_nginx.yaml

Install and Configure MySQL

ansible-playbook install_mysql.yaml

Install Python and pip

ansible-playbook install_python.yml

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Ansible Ad hoc Commands

A. Install a package using apt/yum

a. For CentOS/RHEL:

ansible all -b -m yum -a "name=<package_name> state=present"

b. For CentOS/RHEL:

ansible all -b -m apt -a "name=<package_name> state=present"

B. Other Commands:

• Ping all hosts

ansible all -m ping

• Check free memory on all hosts

ansible all -a "free -m"

• Check uptime on all hosts

ansible all -a "uptime"

• Restart a service

ansible <host_group> -b -m service -a "name=<service_name> state=restarted"

• Run a shell command on all hosts

ansible all -a "ls -l /path/to/directory"

• Gather facts from all hosts

ansible all -m setup

• Create a new user on all hosts

ansible all -b -m user -a "name=<username> password=<password> state=present"

• Check disk space on all hosts

ansible all -a "df -h" 

Notes: The -b flag is used to become a superuser (equivalent to using sudo).

• List all hosts

ansible --list-hosts all  

• List all hosts other than web-servers

ansible --list-hosts \!web-servers