Kubernetes for .NET Developers: From Zero to Cluster

Why Kubernetes?

Kubernetes handles container orchestration — auto-scaling, self-healing, rolling deployments, and service discovery. It's the standard for production microservices.

Deployment YAML

apiVersion: apps/v1
kind: Deployment
metadata:
  name: blog-api
spec:
  replicas: 3
  selector:
    matchLabels:
      app: blog-api
  template:
    metadata:
      labels:
        app: blog-api
    spec:
      containers:
      - name: blog-api
        image: myregistry.azurecr.io/blog-api:latest
        ports:
        - containerPort: 8080
        env:
        - name: ConnectionStrings__Default
          valueFrom:
            secretKeyRef:
              name: blog-secrets
              key: db-connection

Service & Ingress

apiVersion: v1
kind: Service
metadata:
  name: blog-api-svc
spec:
  selector:
    app: blog-api
  ports:
  - port: 80
    targetPort: 8080

Health Checks

builder.Services.AddHealthChecks().AddDbContextCheck<BlogDbContext>();
app.MapHealthChecks("/health");