cloud-native

name	cloud-native
description	Cloud-native application architecture
license	MIT
compatibility	opencode
metadata	{"audience":"developer, architect, devops-engineer","category":"devops"}

What I do

• Design cloud-native architectures using containers and microservices
• Implement Kubernetes-based deployments and operations
• Build serverless applications and functions
• Create event-driven systems with message queues
• Design scalable, resilient, and observable systems
• Implement GitOps and IaC practices

When to use me

• When building new applications for cloud deployment
• When modernizing legacy applications
• When implementing microservices architecture
• When scaling applications elastically
• When adopting Kubernetes or container orchestration
• When implementing cloud-native security

Key Concepts

Twelve-Factor App Principles

1. Codebase: One repo per app, multiple deploys
2. Dependencies: Explicitly declare and isolate
3. Config: Store config in environment
4. Backing Services: Treat as attached resources
5. Build/Release/Run: Strict separation
6. Processes: Stateless, share nothing
7. Port Binding: Export via port binding
8. Concurrency: Scale out via processes
9. Disposability: Fast startup, graceful shutdown
10. Dev/Prod Parity: Keep environments similar
11. Logs: Treat as event streams
12. Admin Processes: Run admin tasks same as processes

Kubernetes Deployment

apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp
  labels:
    app: myapp
spec:
  replicas: 3
  selector:
    matchLabels:
      app: myapp
  template:
    metadata:
      labels:
        app: myapp
    spec:
      containers:
        - name: myapp
          image: myapp:latest
          ports:
            - containerPort: 8080
          resources:
            requests:
              memory: "128Mi"
              cpu: "250m"
            limits:
              memory: "256Mi"
              cpu: "500m"
          livenessProbe:
            httpGet:
              path: /health
              port: 8080
            initialDelaySeconds: 10
          readinessProbe:
            httpGet:
               
               
             

Service Mesh

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: myapp
spec:
  hosts:
    - myapp
  http:
    - match:
        - headers:
            x-canary:
              exact: "true"
      route:
        - destination:
            host: myapp
            subset: v2
          weight: 100
    - route:
        - destination:
            host: myapp
            subset: v1
          weight: 100

Cloud-Native Patterns

• Sidecar: Extend container functionality
• Ambassador: Proxy network connections
• Adapter: Normalize interfaces
• Circuit Breaker: Prevent cascade failures
• Bulkhead: Isolate failures
• Retry with Backoff: Handle transient failures
• Dead Letter Queue: Handle failed messages

Observability Stack

# Prometheus + Grafana + Loki
apiVersion: v1
kind: Pod
metadata:
  name: monitoring
spec:
  containers:
    - name: prometheus
      image: prom/prometheus:latest
      volumeMounts:
        - name: config
          mountPath: /etc/prometheus
    - name: grafana
      image: grafana/grafana:latest
    - name: loki
      image: grafana/loki:latest

Key Principles

• Microservices: Small, independent services
• Containerization: Consistent packaging
• Orchestration: Automated management
• Immutable Infrastructure: Replace, don't modify
• Declarative: Define desired state
• Self-Healing: Automatic recovery
• Elasticity: Scale based on load