Direct DevOps from Quality Thought

Variables in Ansible Refer Here for official docs Ansible allows us to use variables which can be changed during execution. Variables can have default values Ansible allows to set variables from multiple places, ansible has precedence order. Where we can set ansible variables Give me tabular summary of where we can set variables in ansible… Continue reading DevOps Classroom notes 13/Feb/2026

Inventories Refer Here for official docs inventory contains list of servers/systems to connect to. Inventory can be written in two formats ini format (hosts) yaml format Inventory allows us to group servers prompt: I want to learn writing ansible inventories, Explain ini format by default ansible uses all to represent all hosts in inventory file… Continue reading DevOps Classroom notes 12/Feb/2026

Helm contd Lets take a yaml file and create a helm package. Refer Here for manifest Create a helm chart for this Refer Here Refer Here for aks store and Refer Here for changes done.

Ansible Playbooks Ansible Playbook is a declarative way of expressing the tasks to be done on the nodes. It is expressed in yaml Playbook is collect of play’s Each Play will have hosts: where to execute tasks: Each task is achieved by module roles: become: this applies to play or task which means do we… Continue reading DevOps Classroom notes 05/Feb/2026

YAML Ansible works in two ways adhoc commands: for each module construct a ansible command playbook: A declartive approach written in a yaml file. YAML is a data description format built on following principles Name-value or key-value pairs indentation (inspired from python) YAML is a format used by both applications and humans Since we deal… Continue reading DevOps Classroom notes 04/Feb/2026

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