Direct DevOps from Quality Thought

Ways of Working – Ansible Ensure you have list of all the steps (commands) which are working. Take each command find equivelent module in Ansible Write a playbook (yaml) where we list the modules in a specific structure. Summary We need to know the playbook format i.e. YAML Expressing modules in YAML form Finding equivelent… Continue reading DevOps Classroom notes 03/Feb/2026

Setup a Website in Nginx We would need a linux server and webserver and some website Linux Servers: Ubuntu 24.04 WebServer: Nginx Website: Refer Here Steps: Create a linux vm (Azure/AWS/GCP) Installing nginx You are a linux expert, Give me step by step commands to install nginx on ubuntu 24.04 sudo apt update sudo apt… Continue reading DevOps Classroom notes 02/Feb/2026

Helm contd Lets write a yaml file to have a deployment and a load balancer Refer Here for helm chart Exercise: Write a simple helm chart in killer code to deploy a pod Lets create two versions of service one with node port other with loadbalancer Load Balancer service — apiVersion: v1 kind: Service metadata:… Continue reading DevOps Classroom notes 01/Feb/2026

Ansible set up – Key Based on AWS In AWS after creating ec2 instance enable password authentication change PasswordAuthentication to yes reload dameon and restart ssh create a user and make this user sudo user now create a key pair on acn and copy that to node(s) Install Ansible and we can use key based… Continue reading DevOps Classroom notes 01/Feb/2026

Helm Helm uses templating to make k8s yaml’s dynamic which help in Environment specific configurations adopting new changes in CI/CD Using Helm we can maintain releases Helm is considered as a package manager for k8s. Helm uses Go Templating Format for injecting values into yaml files. To use Helm, we need two softwares on client… Continue reading DevOps Classroom notes 31/Jan/2026

Lets Setup Ansible with password based For this lets use ubuntu 24.04 distribution Create a node for ansible installation (acn) ensure python is installed python3 –version Lets install ansible on ubuntu 24.04 sudo apt update sudo apt install software-properties-common sudo add-apt-repository –yes –update ppa:ansible/ansible sudo apt install ansible -y ansible –version Now create a inventory… Continue reading DevOps Classroom notes 29/Jan/2026

Password Based SSH connectivity between two linux machines For this lab exercise i will be using Azure Account to create virtual machines We have create two ubuntu linux instances (node-1, node-2) From a client execute ssh username@ip-or-name and enter credentials On node 1 and node 2 lets create a new user called as myuser sudo… Continue reading DevOps Classroom notes 28/Jan/2026

Configuration Management. Configuration Management refers to deploying configurations to remote systems. Configurations are declarative in nature. (What has to be done over how it has to be done) Examples: Ansible Chef Puppet Salt Powershell DSC CM can be PULL BASED: chef puppet PUSH BASED Ansible PUSH BASED CM Need inventory managing credentials to connect to… Continue reading DevOps Classroom notes 27/Jan/2026

Firewalls in AWS Security Group: Allow the packets at network interface level incoming or outgoing based on ip protocol: TCP/UDP/ICMP Network ACL: Allows/Denies the packets at subnet level based on ip protocol: TCP/UDP/ICMP Web Application Firewall (WAF) Summarize AWS WAF inbuilt protection capabilities AWS Firewall (At Enterprise level) Firewall in Azure Network Security Group: Allows/Denies… Continue reading MultiCloud Classroom notes 25/Jan/2026

Using AI to learn effectively Prompt Golden Rule Role: This is the role which we give to llm Rules: Mention about you about your understanding levels Task question Restrictions (if any) Example Understanding directories organization in linux you are an expert in both windows and linux systems I’m a beginner in linux and have used… Continue reading DevOps Classroom notes 25/Jan/2026