1. Create 3 EC2 Instances with the Same Key Pair
You can use AWS CLI or AWS Management Console to create EC2 instances. Be sure to create them with the same key pair.
2. Install Ansible on the Host Server
SSH into the host server( select any 1 instance as your host server )
install Ansible in a host server
sudo apt update
sudo apt install ansible
3. Copy the Private Key from the Local to the Host Server
Assuming you have the private key on your local machine, you can use scp to copy it to the host server:
scp /path/to/your/key.pem ubuntu@your_host_server_ip:/home/ubuntu/.ssh/key.pem
Open your local machine or terminal --> navigate to your private key or .pem key and execute the command as shown below
we have successfully copied the private key to our remote server.
4. Access the Inventory File
in your local machine or terminal create a file for ansible_inventory as shown
vi ~/ansible_inventory
Add entries for your EC2 instances, for example:
[web]
ec2_instance_1 ansible_ssh_host=ec2_instance_1_ip ansible_ssh_private_key_file=/home/ubuntu/.ssh/key.pem
ec2_instance_2 ansible_ssh_host=ec2_instance_2_ip ansible_ssh_private_key_file=/home/ubuntu/.ssh/key.pem
ec2_instance_3 ansible_ssh_host=ec2_instance_3_ip ansible_ssh_private_key_file=/home/ubuntu/.ssh/key.pem
Create a folder in the host server as shown.
sudo mkdir -p /etc/ansible
Now copy the ansible_inventory file from the local to the host server as shown.
scp ~/ansible_inventory remote_user@remote_host:/path/to/ansible/inventory
5. Create a Playbook to Install Nginx
Create an Ansible playbook, e.g., install_nginx.yml, with the following content:
---
- name: Install Nginx
hosts: web
become: yes
tasks:
- name: Update package cache
apt:
update_cache: yes
become: yes
- name: Install Nginx
apt:
name: nginx
state: present
become: yes
- name: Start Nginx service
service:
name: nginx
state: started
become: yes
This command will execute an Ansible playbook to install Nginx on remote servers specified in the inventory file using a provided SSH private key.
sudo ansible-playbook -i ~/ansible_inventory -e "ansible_ssh_private_key_file=/path/to/your/key.pem" install_nginx.yml
7. Execute the Ansible Playbook
Run the Ansible playbook to install Nginx and deploy the sample webpage on your EC2 instances:
ansible-playbook install_nginx.yml
This playbook will install Nginx and start the Nginx service on the specified instances. You should now be able to access your sample webpage using the public IP addresses of your EC2 instances in a web browser.
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