Accelerate Your Development with DevOps

Explore the concepts, tools, and practices that bridge development and operations for faster, more reliable software delivery.

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🚀 Docker Overview: Containerize Everything

What is Docker?

Docker is a platform that uses OS-level virtualization to deliver software in packages called **containers**.

Containers are lightweight, standalone, executable packages of software that include everything needed to run it: code, runtime, system tools, system libraries, and settings.

How Containers Work

Containers isolate the application from the host environment, ensuring it runs uniformly regardless of the underlying infrastructure.

They share the host OS kernel, making them much lighter and faster to start than traditional Virtual Machines (VMs).

Advantages of Containerization

  • **Consistency:** Environment parity from dev to prod.
  • **Portability:** Run anywhere.
  • **Efficiency:** Low overhead, fast startup.
  • **Isolation:** Security and dependency management.

Container Lifecycle Flow

Build

Create an image from a Dockerfile.

→

Ship

Push the image to a registry (e.g., Docker Hub).

→

Run

Create and start a container from the image.

Docker Image Layers: Efficiency Through Union File Systems

Container Layer (Writable) ~10MB
Application Code Layer ~50MB
Dependencies/Libraries Layer ~150MB
Base OS Layer (e.g., Alpine) ~5MB

Each layer builds on the previous one, making images efficient and reusable.

🔄 CI/CD Pipeline: Automated Software Delivery

Code (CI)

Build (CI)

Test (CI)

Deploy (CD)

Click "Run Pipeline Simulation" or hover over each stage for more!

DevOps Flow Timeline

Plan
Code
Build
Test
Release
Monitor

🤖 GitHub Actions: Workflow Automation

What are GitHub Actions?

GitHub Actions is a CI/CD platform that allows you to automate your build, test, and deployment pipeline directly within your GitHub repository.

It uses event-driven workflows defined in **YAML** files, which run on virtual machines (runners) hosted by GitHub or self-hosted.

Event
→
Job
→
Step

Example Workflow YAML

name: CI/CD Pipeline
on: [push]

jobs:
  build_and_deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Set up Node.js
        uses: actions/setup-node@v3
        with:
          node-version: '18'
      - name: Install dependencies
        run: npm install
      - name: Run tests
        run: npm test

☸️ Kubernetes: Orchestrating Containers

Automate deployment, scaling, and management of containerized applications.

Kubernetes Architecture Overview

Master Node (Control Plane)

Manages the cluster state. Key components include:

API Server etcd Scheduler

Worker Node 1

Runs your applications (Pods).

APP
DB

Worker Node 2

Runs your applications (Pods).

CACHE
APP

Worker Node 3

Runs your applications (Pods).

API
APP

🛠️ Essential DevOps Tools Ecosystem

Kubernetes Logo

Kubernetes (K8s)

Container orchestration platform for automating deployment, scaling, and management.

Jenkins Logo

Jenkins

Open-source automation server to implement the CI/CD pipeline.

Terraform Logo

Terraform

Infrastructure as Code (IaC) tool for provisioning infrastructure.

AWS Logo

AWS/Cloud

Cloud providers (AWS, Azure, GCP) offer scalable DevOps services.

Ansible Logo

Ansible

Automation engine for IT tasks like configuration management & orchestration.

Prometheus Logo

Prometheus

Open-source monitoring solution for event monitoring and alerting.

📚 Learning Resources & Next Steps

Awesome DevOps

A curated list of awesome DevOps platforms, tools, practices, and resources. A must-have bookmark.

Explore List

KodeKloud

Hands-on labs and courses for DevOps tools like Docker, Kubernetes, and Ansible. Learn by doing.

Visit Labs

DevOps Roadmap

An interactive roadmap showing the paths you can take to become a DevOps engineer.

View Roadmap

Certifications (CKA/DCA)

Validate your skills with industry-recognized certifications like Certified Kubernetes Administrator (CKA).

Learn More

💰 Cloud Cost Estimator (Demo)

Estimate monthly costs for a basic cloud setup. (For educational purposes only)

2
50 GB
500 GB
Estimated Monthly Cost: $0.00

🐧 Linux & Shell Fundamentals

Why Linux for DevOps?

The vast majority of cloud servers and containers run on Linux. Mastering the command line is a non-negotiable skill for any DevOps professional.

  • Automation: Shell scripting is key to automating repetitive tasks.
  • Control: Direct, granular control over system resources.
  • Ecosystem: Most DevOps tools are built for or run best on Linux.

Interactive Command Simulator

Try some basic commands below! Type a command and press Enter. Try `help` to see available commands.

Welcome to the Linux simulator!
Current directory: /home/devops
Type 'help' for a list of commands.
user@devops:~$

🎬 Video Learning Hub

What is DevOps? - In Simple English

Docker in 100 Seconds

Kubernetes in 100 Seconds