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From Zero to DevOps: My Practical Roadmap

Published
•6 min read
From Zero to DevOps: My Practical Roadmap
D
Divyanshu Maurya
Part of seriesGit

Title

From Zero to DevOps: My Practical Roadmap for 2025

Intro (Hook)

If you are confused about where to start with DevOps, this vlog is for you.

In this video and article, I will walk through a complete DevOps roadmap using real-world concepts like CI/CD, DevSecOps, Kubernetes, deployment strategies, and environments. By the end, you will know not just what to learn, but in which order and why it actually matters in real projects.

1. What Is DevOps, Really?

DevOps is not just tools like Jenkins, Docker, or Kubernetes. It is a culture and a set of practices that connect three main things:

  • Development

  • Operations

  • Automation across the software delivery lifecycle

The goals are simple:

  • Ship features faster

  • Reduce manual work

  • Improve reliability and user experience

In DevOps, teams automate everything they can: testing, deployments, infrastructure, and monitoring, so software can move from idea to production in repeatable, predictable steps.

2. DevOps vs DevSecOps (Why Security Is Not Optional)

DevSecOps is DevOps with security integrated from the beginning.

Instead of adding security checks at the end, DevSecOps:

  • Shifts security left (checks start from coding and CI stage)

  • Automates security scans in pipelines

  • Treats security as a shared responsibility between Dev, Sec, and Ops

Tools you often see:

  • Vulnerability scans: Trivy, Snyk

  • Static analysis: SonarQube, CodeQL

  • Secrets detection: Gitleaks

  • Policy as code: OPA, Sentinel

In short:
DevOps focuses on speed and reliability.
DevSecOps adds security to that pipeline without slowing it down.

3. My DevOps Learning Roadmap

This is the roadmap I would follow or recommend to anyone starting now.

Stage 1: Core Concepts

Understand:

  • What DevOps is

  • Why companies use CI/CD

  • Why multiple environments exist (Dev, QA, PPD, Prod)

  • What deployment strategies are (Recreate, Blue-Green, Rolling, Canary, A/B, Shadow)

If you cannot explain these in simple language, do not rush to Kubernetes yet.

Stage 2: Git and Collaboration

Before pipelines, you need Git.

Learn:

  • git clone, add, commit, push, pull

  • Branches and pull requests

  • Feature branch workflow

This is important because almost all CI/CD pipelines start when you push code or open a PR.

Stage 3: Build, Test, and Quality Gates

Next, learn how code is built and tested automatically.

Focus on:

  • Build tools: Maven/Gradle (Java), npm, etc.

  • Unit testing frameworks: JUnit, TestNG, PyTest, etc.

  • Code formatting and linting: ESLint, Prettier, Checkstyle

  • Code coverage with tools like Jacoco

Goal: Every push should trigger:

  1. Build

  2. Tests

  3. Basic quality checks

Stage 4: CI Pipelines with Jenkins or GitHub Actions

Now turn that process into a pipeline.

Key ideas:

  • Pipeline stages: Pre-build, Build, Test, Quality, Security, Deploy

  • Writing a Jenkinsfile or GitHub Actions workflow

  • Triggering pipelines on pull request or push

Example stages in a Jenkins pipeline:

  • Pre-Build: linting, secret scan with Gitleaks

  • Build: Maven build

  • Test: run unit tests

  • Quality Gate: SonarQube analysis

  • Security Scan: Trivy scan

  • Docker Build and Push

  • Deploy to Dev or QA environment

This is where you start feeling like a real DevOps engineer.

Stage 5: DevSecOps Integration

Once CI is working, integrate security.

Add these to your pipeline:

  • Static analysis: SonarQube, CodeQL

  • Vulnerability scans: Trivy on filesystem or Docker images

  • Secret scanning: Gitleaks or Talisman

  • Policy as code: OPA or Sentinel for infra rules

Idea: The pipeline should fail if:

  • Critical security issues are found

  • Coverage or quality is below threshold

Now your pipeline is not just fast, it is also safe.

Stage 6: Containerization with Docker

You cannot escape containers in modern DevOps.

Learn:

  • How to write a Dockerfile

  • Copying your app artifact (jar, node build, etc.) into an image

  • Entrypoint and environment variables

  • Multi-stage builds for smaller images

  • Pushing images to Docker Hub or any registry

Example flow:

  1. Build app using Maven

  2. Build Docker image

  3. Push image to registry

  4. Use that image in Kubernetes or other environments

Stage 7: Infrastructure as Code (IaC)

Now move from manual infrastructure to code-driven infra.

Learn:

  • Terraform basics: providers, resources, variables

  • Provisioning servers, networks, and managed services

  • Ansible for configuration management

Goal: You should be able to bring up a full environment (for example, app server, DB, network) with one command using code.

Stage 8: Kubernetes and GitOps

This is the heart of modern DevOps stacks.

Learn Kubernetes primitives:

  • Pod, Deployment, ReplicaSet

  • Service, Ingress

  • ConfigMap, Secret

  • PersistentVolumeClaim

Then:

  • Use Helm to template your manifests

  • Use ArgoCD or Flux for GitOps (cluster syncs state from Git)

Deployments become:

  • Merge to main branch

  • ArgoCD detects change

  • Cluster updates automatically

You can implement rolling updates, canary, or blue-green deployments on top of Kubernetes.

Stage 9: Environments and Promotion Flow

Set up a proper environment flow like this:

  • Local: Developer laptop

  • Dev: first integration environment

  • QA: for testing and regression

  • PPD (Pre-production/UAT): almost identical to production

  • Prod: real user traffic

  • DR: backup environment for disaster recovery

Typical promotion:

  1. Dev completes feature → deploy to Dev

  2. QA validates → move to QA

  3. Business tests in PPD → approve

  4. Deploy to Prod

  5. If something breaks, rollback or switch to Blue-Green or DR site

This is how real companies avoid breaking production with every commit.

Stage 10: Monitoring, Logging, and Feedback

DevOps without monitoring is guesswork.

Set up:

  • Metrics: Prometheus

  • Dashboards: Grafana

  • Logs: Loki or ELK

  • Error tracking: Sentry, New Relic, etc.

Alerts should notify you for:

  • High error rate

  • High latency

  • CPU or memory spikes

In DevSecOps, also add:

  • Security events and audit logs

  • Runtime threat detection with tools like Falco or GuardDuty

Stage 11: Putting It All Together

By this stage, your pipeline for a typical microservice will look like:

  1. Jira story created

  2. Dev creates feature branch

  3. Code pushed, PR raised

  4. CI pipeline runs: build, tests, quality, security

  5. Docker image built and pushed

  6. Deployed to Kubernetes Dev environment

  7. After approvals, promoted to QA → PPD → Prod

  8. Production monitored with dashboards, logs, and alerts

  9. Rollbacks and deployment strategies ready if anything goes wrong

That is modern DevOps with DevSecOps built in.

Closing

If you are starting your DevOps journey:

  • Do not jump directly to Kubernetes

  • Start with Git, CI, and automation basics

  • Then move to containers, IaC, and Kubernetes

  • Add security and observability as you go

In upcoming posts or videos, I can go deep into:

  • Writing a real Jenkinsfile

  • Setting up Trivy, SonarQube, and Gitleaks

  • Deploying to Kubernetes using ArgoCD

If you liked this roadmap, follow me on Hashnode and drop a comment on which stage you are currently in.

#devops

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