Explore

Kubernetes & Docker

🐳 Part 1: Docker – Containerization

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✅ Step 1: Understand the Basics

What is a container?

Difference between VM and container

Why Docker? Use-cases in dev and prod

📚 Learn:

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Docker Official Docs - Overview⁠

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YouTube:

Docker for Beginners⁠

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✅ Step 2: Install Docker

Install Docker Desktop (Windows/Mac) or Docker Engine (Linux)

🔗

Install Docker⁠

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✅ Step 3: Learn Docker CLI

bash

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docker --version

docker run hello-world

docker ps -a

docker images

docker exec -it <container> /bin/bash

🧪 Try:

bash

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docker run -d -p 8080:80 nginx

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✅ Step 4: Docker Images

Dockerfile basics

docker build

docker tag, docker push

📄 Sample Dockerfile:

Dockerfile

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FROM node:18-alpine

WORKDIR /app

COPY . .

RUN npm install

CMD ["npm", "start"]

🧪 Project: Dockerize a Node.js or Go app.

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✅ Step 5: Volumes & Networking

Bind Mount vs Volume

Docker networks (bridge, host, none)

Compose multi-container setup

📦 Practice:

yaml

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# docker-compose.yml

version: "3"

services:

web:

image: nginx

ports:

- "80:80"

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✅ Step 6: Debugging & Logs

docker logs <container>

docker inspect

docker stats

🛠️ Tools:

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Portainer⁠

– GUI for Docker

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☸️ Part 2: Kubernetes – Orchestration

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✅ Step 1: Learn Kubernetes Architecture

Master, Node, Pod, ReplicaSet, Deployment

Services: ClusterIP, NodePort, LoadBalancer

ConfigMap, Secret, Volumes

🎥

Kubernetes in 10 Minutes⁠

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✅ Step 2: Install K8s Locally

Best:

Minikube⁠

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Alternative: Docker Desktop (Kubernetes enabled)

bash

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minikube start

kubectl get nodes

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✅ Step 3: Learn kubectl Commands

bash

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kubectl get pods

kubectl apply -f deployment.yaml

kubectl describe pod <pod-name>

kubectl logs <pod-name>

📘 Use:

kubectl Cheat Sheet⁠

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✅ Step 4: Write K8s YAML Files

deployment.yaml

yaml

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apiVersion: apps/v1

kind: Deployment

metadata:

name: myapp

spec:

replicas: 2

selector:

matchLabels:

app: myapp

template:

metadata:

labels:

app: myapp

spec:

containers:

- name: myapp

image: myapp:latest

ports:

- containerPort: 3000

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✅ Step 5: Services and Networking

Expose pods using kubectl expose

Types: ClusterIP, NodePort, LoadBalancer

bash

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kubectl expose deployment myapp --type=NodePort --port=3000

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✅ Step 6: ConfigMaps, Secrets, Volumes

Store env vars in ConfigMap

Use Secret for sensitive data

Use PersistentVolumeClaim for storage

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✅ Step 7: Helm (Package Manager)

Install charts for Prometheus, NGINX, etc.

bash

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helm repo add bitnami https://charts.bitnami.com/bitnami

helm install my-nginx bitnami/nginx

🔗

Helm Docs⁠

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✅ Step 8: Monitoring & Observability

Prometheus + Grafana

Lens (K8s GUI)

kubectl top, events

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🔧 Mini-Projects for Practice

Dockerize a React + Node.js app and run using Docker Compose.

Deploy the app in Minikube with 3 replicas.

Expose the app via NodePort.

Add ConfigMap for dynamic config.

Deploy MongoDB with Persistent Volume and Secret.

Use Helm to install WordPress.

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📚 Resources

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Play with Docker (Free lab)⁠

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Kubernetes Playground⁠

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Katacoda K8s Scenarios⁠

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Book: Kubernetes Up & Running

YouTube:

TechWorld with Nana⁠

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🎯 Final Goal

Be able to:

Build, tag, push Docker images

Use Docker Compose for dev environments

Deploy applications on Kubernetes with high availability

Handle configs/secrets/storage

Monitor and scale applications

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Would you like a Notion page, PDF guide, or interactive roadmap app version of this as well?

Docs for learning

🐳 Docker: Start Here

✅ 1. Official Docker Documentation

📘 Beginner-friendly and very well maintained.

🔗

https://www.notion.so/docs-21169bc4705a8079b658f943831a47ac?pvs=21⁠

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https://docs.docker.com/get-started/⁠

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Includes:

Docker Desktop installation

Basic commands: docker build, docker run, docker ps, etc.

Container vs. Image explanation

Docker Compose basics

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✅ 2. Docker Playground (No Install Required)

Run Docker in browser!

🔗

https://labs.play-with-docker.com/⁠

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Great to practice without installing anything.

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✅ 3. Docker Curriculum (By Prakhar Srivastav)

Excellent interactive tutorial using real-world examples.

🔗

https://docker-curriculum.com/⁠

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Topics:

Creating and running containers

Dockerfiles and images

Networking and volumes

Docker Compose

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