Day 59 - Ansible Project 🔥

Ansible playbooks are amazing, as you learned yesterday. What if you deploy a simple web app using Ansible? Sounds like a good project, right? Let’s get started!

Task-01: Create 3 EC2 Instances 🖥️☁️

Log in to AWS Management Console 🖥️
Navigate to EC2 Dashboard ➡️
Launch Instance:
- Choose the Amazon Machine Image (AMI) (e.g., Ubuntu Server 20.04 LTS) 🐧.
- Select the instance type (e.g., t2.micro for free tier) 💸.
- Configure instance details:
  - Number of instances: 3
  - Network settings: Default VPC 🌐.
- Add Storage: Leave the default settings 📦.
- Add Tags: (Optional) Tag your instances for easy identification 🏷️.
- Configure Security Group:
  - Add a rule to allow SSH (port 22) from your IP 🔒.
  - Add a rule to allow HTTP (port 80) from anywhere 🌍.
- Review and Launch: Use the same key pair for all three instances (create a new one if you don’t have any) 🗝️.

Install Ansible on Host Server 🛠️

Connect to Your Host Server:
- Open terminal and SSH into your EC2 instance (one of the three you just created) 💻.

    ssh -i /path/to/your-key-pair.pem ubuntu@your-ec2-instance-public-dns

Update Package Lists 🔄:
```
 sudo apt update
```

Install Ansible 📦:

 sudo apt-add-repository ppa:ansible/ansible
 sudo apt install ansible -y 
 sudo ansible --version

Copy the Private Key to Host Server (Ansible_host) 🔑

Transfer the Private Key:
- From your local machine, copy the key to the host server using SCP 🚀.

    escp -i /path/to/your-key-pair.pem /path/to/your-key-pair.pem ubuntu@your-ec2-instance-public-dns:/home/ubuntu/.ssh/

Set Permissions on the Key:
- SSH into your host server 💻.

    ssh -i /path/to/your-key-pair.pem ubuntu@your-ec2-instance-public-dns

Change permissions of the private key 🔐.

    chmod 600 /home/ubuntu/.ssh/ansible_keys.pem

Access the Inventory File 📄

Edit the Ansible Hosts File ✏️:
```
 sudo vim /etc/ansible/hosts
```
Add Your EC2 Instances:
- Add the IP addresses of your EC2 instances under a new group called [webservers] 🖥️.

    [servers]
    server01 ansible_host=3.136.18.176
    server02 ansible_host=3.137.211.34

    [all:vars]
    ansible_python_interpreter=/usr/bin/python3
    ansible_ssh_private_key_file=/home/ubuntu/.ssh/ansible_keys

Create a Playbook to Install Nginx 📜

Create Playbook File:
- On your host server, create a new playbook file 📝.

    vim install_nginx.yml

Write the Playbook:

 ---
 - name: Install Nginx on web servers
   hosts: webservers
   become: yes
   tasks:
     - name: Ensure Nginx is installed
       apt:
         name: nginx
         state: present

     - name: Start Nginx service
       service:
         name: nginx
         state: started
         enabled: yes

     - name: Deploy sample web page
       copy:
         content: "<h1>Welcome to your Ansible-deployed web server!</h1>"
         dest: /var/www/html/index.html

Deploy the Sample Webpage Using the Ansible Playbook 🌐

Run the Playbook 🎉:
```
 ansible-playbook install_nginx.yml
```