DevOps Classroom notes 27/Feb/2025

Ansible Setup

• Overview
  
• Pre-reqs:
  • Servers should be reachable from Ansible control node
  • Servers should have python3 installed
• Steps:
  • Create a user devops and give this user sudo permissions
  • Install Ansible on the control node
  • Test the setup

Linux Instances – Login

• SSH (Secure Shell) is protocol used to login into linux instances which on a broader note supports two types
  • password based authentication
  • key based authentication
• Windows earlier didn’t had inbuild ssh clients now on all latest distributions from windows 11, ssh clients are part of windows
• SSH Command For password based ssh <username>@<ip/name-server>

Ansible installation on Azure

• Both distributions will be ubuntu 24.04.
• This installation will be going on the linux machines with password enabled
• Creating linux machine on Azure (Watch classroom recording) or Refer Here
• Created two ubuntu vms ansible-control-node and node- in the same network with os ubuntu-24.04 and username devops
• Lets create inventory, create a new file on ansible control node hosts with node-1 s private ip
• Now lets install ansible on ubuntu

sudo apt update
sudo apt install software-properties-common
sudo add-apt-repository --yes --update ppa:ansible/ansible
sudo apt install ansible -y

• To verify ansible installation ansible --version
  

Ansible ping

• Ansible ping will verify if the ansible control node to node configuration is done correctly or not
• This also requires inventory
• The command is ansible -m ping -i hosts all, This command expects the credentials to be keys
• Ensure you perform a manual ssh into node from control node as it generates an entry in known_hosts file which is used by ansible for password based authenticates
• Since we are using password based our command would be ansible -m ping -k -i hosts all