Introduction to Cloud Native
Cloud native development means designing an application from the start to run on cloud infrastructure: packaged in containers, split into services where that helps, and deployed, scaled and recovered through automation rather than by hand.
Core Concepts
Containerization
- Docker fundamentals
- Container orchestration
- Image optimization
- Security best practices
Microservices
- Service decomposition
- API design patterns
- Service mesh
- Data consistency
DevOps Practices
- CI/CD pipelines
- Infrastructure as Code
- Monitoring & logging
- Automated testing
Implementation Guide
1. Container Strategy
# Multi-stage build: compile in one image, ship a smaller one
FROM node:22-alpine AS build
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
RUN npm run build
FROM node:22-alpine
WORKDIR /app
ENV NODE_ENV=production
COPY package*.json ./
RUN npm ci --omit=dev
COPY --from=build /app/dist ./dist
# Run as the image's non-root user
USER node
CMD ["node", "dist/server.js"]
2. Kubernetes Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
name: myapp
spec:
replicas: 3
selector:
matchLabels:
app: myapp
template:
metadata:
labels:
app: myapp
spec:
containers:
- name: myapp
image: myapp:1.0.0
Best Practices
Scalability
- Horizontal scaling
- Load balancing
- Auto-scaling policies
Resilience
- Circuit breakers
- Retry policies
- Fallback mechanisms
Security
- Image scanning
- Network policies
- Secret management
Tools
Docker
Builds and runs container images
Kubernetes
Container orchestration platform
GitOps Tools
Argo CD or Flux: keep the cluster in sync with what is in Git