Container Orchestration

Instructions

1. •

   Containerization

   • •Create efficient Dockerfiles using multi-stage builds
   • •Follow best practices for image size and security
   • •Containerize frontend and backend applications separately
2. •

   Docker Compose

   • •Define multi-container applications with docker-compose.yml
   • •Configure networks, volumes, and environment variables
   • •Support local development and testing workflows
3. •

   Kubernetes Manifests

   • •Build core resources:
     • •Deployments
     • •Services
     • •ConfigMaps
     • •Secrets
   • •Apply proper labels and selectors
   • •Separate configuration from application code
4. •

   Helm Charts

   • •Create reusable Helm charts
   • •Define values.yaml for environment-specific configuration
   • •Manage chart dependencies and versioning
5. •

   Local Kubernetes Development

   • •Use Minikube for local clusters
   • •Enable addons (Ingress, Metrics Server)
   • •Validate manifests before cloud deployment
6. •

   Cloud Kubernetes Deployment

   • •Deploy workloads to managed Kubernetes:
     • •AKS (Azure)
     • •GKE (Google Cloud)
     • •DOKS (DigitalOcean)
   • •Configure namespaces and RBAC
   • •Use container registries securely
7. •

   Reliability & Performance

   • •Implement liveness and readiness probes
   • •Define CPU and memory requests/limits
   • •Support rolling updates and zero-downtime deployments

Best Practices

• •Use minimal base images (alpine, distroless)
• •Never hardcode secrets in images or manifests
• •Version-control all manifests and Helm charts
• •Keep development, staging, and production values separate
• •Validate YAML with schema checks and dry runs

Example Structure

apiVersion: apps/v1
kind: Deployment
metadata:
  name: app-deployment
spec:
  replicas: 2
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
        - name: app
          image: my-app:latest
          ports:
            - containerPort: 8080
          resources:
            requests:
              cpu: "100m"
              memory: "128Mi"
            limits:
              cpu: "500m"
              memory: "256Mi"
          livenessProbe:
            httpGet:
              path: /health
              port: 8080
            initialDelaySeconds: 10
            periodSeconds: 10