👨‍💻 Kubernetes Advanced: Production-Ready Deployments

Kubernetes Advanced: Production-Ready Deployments

Welcome to the final part of our Kubernetes tutorial series! In this advanced guide, we’ll explore production-grade features and best practices for enterprise deployments.

What We’ll Cover

1. StatefulSets and Persistent Storage
2. Service Mesh with Istio
3. Advanced Monitoring and Logging
4. High Availability Patterns

Prerequisites

• Completed our Intermediate Kubernetes tutorial
• Familiarity with Kubernetes resources
• Understanding of microservices architecture

StatefulSets and Persistent Storage

Creating a StatefulSet

apiVersion: apps/v1 kind: StatefulSet metadata: name: web spec: serviceName: "nginx" replicas: 3 selector: matchLabels: app: nginx template: metadata: labels: app: nginx spec: containers: - name: nginx image: nginx:1.14.2 ports: - containerPort: 80 name: web volumeMounts: - name: www mountPath: /usr/share/nginx/html volumeClaimTemplates: - metadata: name: www spec: accessModes: [ "ReadWriteOnce" ] resources: requests: storage: 1Gi

Service Mesh with Istio

Installing Istio

istioctl install --set profile=demo -y

Enabling Istio Injection

kubectl label namespace default istio-injection=enabled

Virtual Service Configuration

apiVersion: networking.istio.io/v1alpha3 kind: VirtualService metadata: name: reviews-route spec: hosts: - reviews http: - match: - headers: end-user: exact: jason route: - destination: host: reviews subset: v2 - route: - destination: host: reviews subset: v1

Advanced Monitoring

Prometheus Setup

apiVersion: monitoring.coreos.com/v1 kind: Prometheus metadata: name: prometheus spec: serviceAccountName: prometheus serviceMonitorSelector: matchLabels: team: frontend resources: requests: memory: 400Mi enableAdminAPI: false

Grafana Dashboard Configuration

apiVersion: integreatly.org/v1alpha1 kind: GrafanaDashboard metadata: name: golang-dashboard spec: json: > { "dashboard": { "id": null, "title": "Golang Dashboard", ... } }

High Availability Patterns

Pod Disruption Budget

apiVersion: policy/v1 kind: PodDisruptionBudget metadata: name: app-pdb spec: minAvailable: 2 selector: matchLabels: app: critical-app

Anti-Affinity Rules

apiVersion: apps/v1 kind: Deployment metadata: name: high-availability-app spec: replicas: 3 template: spec: affinity: podAntiAffinity: requiredDuringSchedulingIgnoredDuringExecution: - labelSelector: matchExpressions: - key: app operator: In values: - high-availability-app topologyKey: "kubernetes.io/hostname"

Production Checklist

1. Security:
   • Network Policies
   • RBAC configuration
   • Pod Security Policies
2. Monitoring:
   • Prometheus metrics
   • Grafana dashboards
   • Alert management
3. Backup:
   • etcd backup
   • PV snapshots
   • Disaster recovery plan
4. Scaling:
   • HPA configuration
   • VPA setup
   • Cluster autoscaling

What’s Next?

Consider exploring:

• GitOps workflows with Flux/ArgoCD
• Custom Resource Definitions (CRDs)
• Operator pattern implementation
• Cloud-native security practices

Additional Resources

• Istio Documentation
• Prometheus Operator
• Kubernetes Production Best Practices