11_Ansible_Setup.md

Ansible Setup in Amazon Linux VMs

Step-0: Create 3 Amazon Linux VMs in AWS (Free Tier Eligible - t2.micro)

1 - Control Node
2 - Managed Nodes

Note: Connect to all 3 VMs using MobaXterm

Step-1: Execute below commands in all 3 VMs

a) Create user

sudo useradd ansible
sudo passwd ansible

b) Configure user in sudoers file

sudo visudo

ansible ALL=(ALL) NOPASSWD: ALL

c) Update sshd config file

sudo vi /etc/ssh/sshd_config

-> comment PasswordAuthentication no -> PermitEmptyPasswords yes

d) Restart the server

sudo service sshd restart

Note: Do the above steps in all the 3 machines

Step-2: Install Ansible in Control Node

a) Switch to Ansible user

sudo su ansible
cd ~

b) Install Python

  sudo yum install python3 -y

c) Check python version

python3 --version

d) Install PIP (It is a python package manager)

sudo yum -y install python3-pip

e) Install Ansible using Python PIP

pip3 install ansible --user

f) Verify ansible version

ansible --version

g) Create ansible folder under /etc

sudo mkdir /etc/ansible 

Step-3: Generate SSH Key In Control Node and Copy SSH key into Managed Nodes

a) Switch to ansible user

sudo su ansible

Generate ssh key using below command

ssh-keygen

b) Copy it to Managed Nodes as ansible user

ssh-copy-id ansible@<ManagedNode-Private-IP>

Ex : $ ssh-copy-id [email protected]

Note: Repeat above command by updating HOST IP for all the managed Servers.

Step-4: Update Host Inventory in Ansible Server to add managed node servers details

sudo vi /etc/ansible/hosts

[webservers]
172.31.47.247
[dbservers]
172.31.44.90

Step-5: Test Connectivity

ansible all -m ping