kubernetes

Kubernetes Container Orchestration

Instructions

1. Assess the deployment need: Single service, microservices, or complex application.
2. Follow Kubernetes best practices:
   • Use namespaces for isolation
   • Set resource limits
   • Use liveness and readiness probes
   • Implement proper RBAC
3. Provide complete manifests: Include all necessary resources.
4. Guide on production patterns: High availability, scaling, monitoring.

Core Resources

Deployment

apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp
  namespace: production
  labels:
    app: myapp
spec:
  replicas: 3
  selector:
    matchLabels:
      app: myapp
  template:
    metadata:
      labels:
        app: myapp
    spec:
      containers:
        - name: myapp
          image: myregistry/myapp:v1.0.0
          ports:
            - containerPort: 3000
          resources:
            requests:
              cpu: "100m"
              memory: "128Mi"
            limits:
              cpu: "500m"
              memory: "512Mi"
          livenessProbe:
            httpGet:
              path: /health
              port: 3000
            initialDelaySeconds: 30
            periodSeconds: 10
          readinessProbe:
            httpGet:
              path: /ready
              port: 3000
            initialDelaySeconds: 5
            periodSeconds: 5
          env:
            - name: NODE_ENV
              value: "production"
            - name: DATABASE_URL
              valueFrom:
                secretKeyRef:
                  name: myapp-secrets
                  key: database-url
          volumeMounts:
            - name: config
              mountPath: /app/config
      volumes:
        - name: config
          configMap:
            name: myapp-config

Service

apiVersion: v1
kind: Service
metadata:
  name: myapp
  namespace: production
spec:
  selector:
    app: myapp
  ports:
    - port: 80
      targetPort: 3000
  type: ClusterIP
---
# External LoadBalancer
apiVersion: v1
kind: Service
metadata:
  name: myapp-external
spec:
  selector:
    app: myapp
  ports:
    - port: 80
      targetPort: 3000
  type: LoadBalancer