Heldinhow/kubernetes-deploy

Kubernetes Deployment

Overview

Kubernetes provides container orchestration for automated deployment, scaling, and management. This skill should be invoked when deploying containerized applications, managing microservices, or implementing auto-scaling.

Core Principles

• Declarative: Define desired state in manifests
• Self-Healing: Kubernetes maintains desired state
• Scaling: Horizontal pod autoscaling
• Service Networking: Services enable pod communication

Preparation Checklist

• [ ] Containerize application with Dockerfile
• [ ] Push image to registry
• [ ] Design Kubernetes manifests
• [ ] Plan resource requirements

Step-by-Step Process

1. Containerize: Build Docker image
2. Push: Push to container registry
3. Manifest: Write Deployment, Service, ConfigMap
4. Apply: Use kubectl apply -f
5. Configure: Set up Ingress for external access
6. Scale: Configure HPA for autoscaling

Do's and Don'ts

• ✅ Do use ConfigMaps for configuration
• ✅ Do set resource requests and limits
• ✅ Do implement health checks
• ❌ Don't hardcode secrets in manifests
• ❌ Don't skip namespace isolation
• ❌ Don't ignore resource limits

Anti-Patterns

• No Limits: Not setting CPU/memory limits
• Secrets in Code: Hardcoding secrets
• No Health Checks: Missing liveness/readiness probes
• Single Pod: No replicas for production