Cloud Native Development

From the archive: a general guide from February 2024, tidied and kept for reference.

Cloud Native Development

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