3 | Ansible Hands-On Demo Project | Step by Step for Beginners

Video Description

All Free Tutorials - https://AutomationStepByStep.com/ How to setup Ansible Controller machine How to setup Ansible Host machines Making connection between Controller and Hosts Adding host and playbook file on Controller Run Playbook to configure Host Machines We will need Linux machines for this DEMO You can use any Linux machines or setup using any cloud platforms like AWS In this Demo I am going to use Vagrant to create Linux Virtual Machines In any case the process and steps will remain same Ref: Create Free Linux on AWS and connect from Windows and Mac OS - https://youtu.be/6bb-OqbI8-E Vagrant Beginner Playlist - https://www.youtube.com/playlist?list=PLhW3qG5bs-L9S272lwi9encQOL9nMOnRa Vagrant VM Boxes - https://app.vagrantup.com/centos/boxes/7 Part A Ansible Controller Machine Setup Step 1 - Install VirtualBox and Vagrant on your local machine. Step 2 - Open a terminal and navigate to the directory where you want to set up your Ansible project. Step 3 - Create a new directory for your Ansible controller VM by running the command mkdir ansible-controller Step 4 - Navigate to the directory and create a new file called Vagrantfile by running the command vagrant init centos/7 Step 5 - Edit the Vagrantfile and add the lines to the end of the file to provision Ansible on the VM Vagrantfile for creating VM for Ansible Controller Vagrant.configure("2") do |config| config.vm.define "ansible-controller" do |controller| controller.vm.hostname = "controller" end config.vm.box = "centos/7" config.vm.provision "shell", inline: ＜＜-SHELL sudo yum install epel-release -y sudo yum install ansible -y SHELL end Step 6 - Save & check its a valid vagrantfile vagrant validate Then run command vagrant up to start the VM Step 7 - Once the VM is up and running, connect to it using SSH by running the command vagrant ssh Check ansible is installed - ansible --version Step 8 - Create a new directory for your Ansible project on the controller VM by running the command mkdir ansible-project Step 9 - Navigate to the ansible-project directory and create a new file called hosts by running the command touch hosts Step 10 - Create a new file called playbook.yml. This file will contain the tasks you want to perform on your managed hosts As of now the hosts and the playbook file are empty We will now create some host machines that will be controlled by the Ansible controller Part B Ansible Host Machines Setup Step 1 - On terminal navigate to your Ansible Project folder Step 2 - Create a new directory for your host machines by running the command mkdir host-machines Step 3 - Navigate to host-machines directory and create a new Vagrantfile by running the command vagrant init centos/7 Step 4 - Edit the Vagrantfile and modify the following lines to set up two Vagrant machines: Vagrantfile for creating VMs for Ansible Host Vagrant.configure("2") do |config| config.vm.box = "centos/7" config.vm.define "web" do |web| web.vm.hostname = "web" web.vm.network "private_network", ip: "192.168.33.10" end config.vm.define "db" do |db| db.vm.hostname = "db" db.vm.network "private_network", ip: "192.168.33.11" end config.vm.network "forwarded_port", guest: 80, host: 8080, auto_correct: true config.vm.usable_port_range = (8000..9000) end Step 6 - Save & check its a valid vagrantfile vagrant validate Then run command vagrant up to start the VM Step 7 - Check the status of machines vagrant status Once the VMs are up, connect to them using SSH vagrant ssh ＜machine-name＞ e.g vagrant ssh web This completes the process of setting up host machines Part C Making connection between controller and host machines Step 1 - Make sure all machines are up and running Step 2 - Run command ip addr on each machine and check they have IP addresses in the same range (e.g. 192.168.33.x). Step 3 - On Controller machine run the command ssh-keygen to generate an SSH key pair Step 4 - Goto ~/.ssh folder and check the public and private keys generated Step 5 - Copy the public key to the host machines by running the command ssh-copy-id ＜user＞@＜host＞ For example, to copy the public key to the web machine, run the command ssh-copy-id [email protected] Can do this manually by copying the contents of the .pub file generated by ssh-keygen and pasting it into the ~/.ssh/authorized_keys file on the host machines Step 6 - Test the SSH connection by running the ssh command with the IP address of the host machines- For example: ssh [email protected] ssh [email protected] Due to limitation of characters I am adding notes in this PDF file - https://drive.google.com/file/d/1UHOMwQuvnIbCeSrEDeV6CO6S2ofa5Cs9/view?usp=sharing ▬▬▬▬▬▬▬ You can support my mission for education by sharing this knowledge and helping as many people as you can If my work has helped you, consider helping any animal near you, in any way you can Never Stop Learning Raghav Pal —