Er. Bhupendra

Posted on Mar 11

devops part 2

Achha — ab complete production DevOps pipeline ko start → end samjhte hain, jisme GitHub → Jenkins → Docker → Kubernetes → AWS → Users, saath me IP, ports, load balancer, security groups sab include hote hain. Ye hi architecture zyada tar companies use karti hain.

1️⃣ Developer → Code Repository

Developer apna code version control system me push karta hai, jaise GitHub.

Example:

git add .
git commit -m "new feature"
git push origin main

📌 Yaha se CI pipeline trigger hoti hai.

2️⃣ CI Pipeline (Jenkins Build & Test)

Code push hote hi Jenkins webhook se trigger hota hai.

Typical steps:

GitHub
↓
Jenkins
↓
Code checkout
↓
Build
↓
Unit tests
↓
Artifact create

Example commands:

npm install
npm test
npm build

Jenkins server usually port par run karta hai:

Example access:

http://Jenkins-IP:8080

3️⃣ Docker Pipeline (Container Build)

Build hone ke baad Jenkins Docker image create karta hai using Docker.

Steps:

Application code
↓
Dockerfile
↓
Docker build
↓
Docker image
↓
Push to registry

Example:

docker build -t myapp:v1 .
docker push myrepo/myapp:v1

Image store hoti hai registry me:

Docker Hub
Amazon Elastic Container Registry

Connection usually:

Port 443 (HTTPS)

4️⃣ CD Pipeline (Deploy to Kubernetes)

Deployment hota hai Kubernetes cluster me.

Flow:

Docker image
↓
Kubernetes deployment
↓
Pods
↓
Service
↓
Ingress / Load Balancer

Example command:

kubectl apply -f deployment.yaml

Deployment example:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: app
spec:
  replicas: 3

Kubernetes automatically:

containers run karega
scaling karega
crash hone par restart karega
rolling updates karega

5️⃣ AWS Infrastructure

Cloud infrastructure commonly Amazon Web Services par hota hai.

Typical architecture:

VPC
↓
Public Subnet
↓
Load Balancer
↓
Kubernetes Nodes / EC2
↓
Pods
↓
Database

Components:

VPC
EC2 / EKS
Load Balancer
RDS database
Security Groups

6️⃣ Ports in Production

Important ports:

Service	Port
SSH	22
HTTP	80
HTTPS	443
Jenkins	8080
Application	3000
MySQL	3306

Example request flow:

User
↓
https://domain.com
↓
Port 443
↓
Load Balancer
↓
Port 3000
↓
Application Pod

7️⃣ Security Groups (Firewall)

AWS me firewall ko Security Group bolte hain.

Example rules:

22 → DevOps SSH access
80 → HTTP
443 → HTTPS
3000 → Application port

Example:

0.0.0.0/0 → 443

Matlab internet se HTTPS allowed.

8️⃣ Monitoring & Logs

Production systems monitoring ke bina incomplete hote hain.

Tools:

Prometheus
Grafana

Flow:

Application
↓
Metrics
↓
Prometheus
↓
Grafana Dashboard
↓
Alerts

🔥 Final Production DevOps Architecture

Complete pipeline:

Developer
↓
GitHub
↓
Jenkins CI Pipeline
↓
Build + Test
↓
Docker Build
↓
Docker Registry
↓
Kubernetes Deployment
↓
Pods
↓
Load Balancer
↓
Users
↓
Monitoring

✅ Important concept