Direct DevOps from Quality Thought

Git Installing git: Windows (Do the manual install to get the bash into terminal) mac: brew install git Git needs the following to be part of commit id username email id This information can be stored in git config Git configuration can be at system level global level (at user level) local repo level (at… Continue reading DevOps Classroom notes 02/Mar/2026

Istio on AKS Refer Here for the steps to be followed Before trying apps ensure we do the following steps kubectl create namespace bookinfo kubectl label namespace bookinfo istio.io/rev="$REVISION" –overwrite kubectl get ns bookinfo –show-labels kubectl apply -f https://raw.githubusercontent.com/istio/istio/refs/tags/1.29.0/samples/bookinfo/platform/kube/bookinfo.yaml -n bookinfo Deploy the virtual service kubectl apply -n bookinfo -f – <<‘EOF’ apiVersion: networking.istio.io/v1beta1 kind:… Continue reading DevOps Classroom notes 01/Mar/2026

How to work with Git Technical perspective: To understand this lets consider the following situation You have pile of books You are supposed to move this books to a new location where they will be displayed in some library Now we might follow the below apporach This is exactly what happens in Git For live… Continue reading DevOps Classroom notes 26/Feb/2026

Version Control Systems CI Starts with changes into Version Control System. Terms: Repository: Is a storage and it also has versions or revisions i.e. history of all of the changes done Changeset: This is set of changes across single/multiple files done to add a feature. Statement: Organizations need Source Code Repositories not Source Code Storages.… Continue reading DevOps Classroom notes 25/Feb/2026

What is the purpose of CI/CD Before CI/CD Company: SuperKart Pvt Ltd They sell groceries online Team leads (Characters) Ravi: Backend Development Phani: Frontend Development Imran: Testing Mahesh: Admin CEO: Always ask “is it live” Plan: One week before Diwali we should launch our application Application View Release: Ravi: Delivering all backend by Aug 2026… Continue reading DevOps Classroom notes 24/Feb/2026

Authentication and Authorization in K8s Authentication answers who is making this request K8s Api server does Authentication Authorization (RBAC) Admission Control: Should this request be modified or validated who can authenticate to k8s User Service Account (Pod identity) External System Authorization There are 4 main components Role: This defines permissions inside a specific namespace Cluster-Role:… Continue reading DevOps Classroom notes 22/Feb/2026

Ansible roles Refer Here for ansible roles In ansible we can make two reusable artifacts module: To develop a reusable module, we need to write python code role (reusable playbook): A playbook can be made reusable A role cannot execute on its own, a playbook has to call it. Refer Here for changes done to… Continue reading DevOps Classroom notes 22/Feb/2026