┌─────────────────────────────────────────────────────────────┐
│                Enterprise EKS Multi-AZ                      │
├─────────────────────────────────────────────────────────────┤
│  ┌─────────────┐    ┌─────────────┐    ┌─────────────┐     │
│  │   AZ-2a     │    │   AZ-2b     │    │   AZ-2c     │     │
│  │ ┌─────────┐ │    │ ┌─────────┐ │    │ ┌─────────┐ │     │
│  │ │ Nodes   │ │    │ │ Nodes   │ │    │ │ Nodes   │ │     │
│  │ └─────────┘ │    │ └─────────┘ │    │ └─────────┘ │     │
│  └─────────────┘    └─────────────┘    └─────────────┘     │
│         │                   │                   │          │
│  ┌─────────────────────────────────────────────────────┐   │
│  │              EKS Control Plane                     │   │
│  │            (Multi-AZ Managed)                      │   │
│  └─────────────────────────────────────────────────────┘   │
└─────────────────────────────────────────────────────────────┘

Highly available, production-ready EKS cluster spanning multiple Availability Zones. Designed for mission-critical workloads with advanced security, monitoring, disaster recovery, and compliance capabilities.

• Multi-AZ Deployment - Nodes distributed across 3 availability zones
• Auto Scaling - Cluster and pod autoscaling with predictive scaling
• Load Balancing - Application Load Balancer with health checks
• Disaster Recovery - Cross-region backup and automated failover

• Private Subnets - Worker nodes isolated in private subnets
• IAM Integration - Fine-grained access control with RBAC
• Network Policies - Pod-to-pod communication control
• Secrets Management - AWS Secrets Manager and KMS integration
• Image Scanning - Container vulnerability scanning with Trivy

• CloudWatch Container Insights - Native AWS monitoring
• Prometheus & Grafana - Custom metrics and dashboards
• Jaeger Tracing - Distributed request tracing
• Centralized Logging - Fluentd with CloudWatch Logs

# Required tools
aws-cli >= 2.0
terraform >= 1.5
kubectl >= 1.28
helm >= 3.0

# Clone repository
git clone https://github.com/uldyssian-sh/enterprise-eks-multi-az-cluster.git
cd enterprise-eks-multi-az-cluster

# Configure variables
cp terraform/environments/dev/terraform.tfvars.example terraform/environments/dev/terraform.tfvars
# Edit terraform.tfvars with your settings

# Deploy infrastructure
cd terraform/environments/dev
terraform init
terraform plan
terraform apply

# Update kubeconfig
aws eks update-kubeconfig --region us-west-2 --name eks-multi-az-cluster-dev

# Verify deployment
kubectl get nodes
kubectl get pods --all-namespaces

• System Nodes - Dedicated for system components (3-9 nodes)
• Application Nodes - General workloads (6-30 nodes)
• Database Nodes - Stateful workloads with taints (3-12 nodes)

• VPC Configuration - Custom VPC with public/private subnets
• CNI Plugin - AWS VPC CNI with security groups for pods
• Ingress Controller - AWS Load Balancer Controller
• Service Mesh - Istio for advanced traffic management

• EBS CSI Driver - Dynamic persistent volume provisioning
• EFS CSI Driver - Shared file system storage
• Storage Classes - Multiple performance tiers (gp3, io2, st1)

# Prometheus configuration
prometheus:
  retention: 30d
  storage: 100Gi
  replicas: 2
  
grafana:
  persistence: true
  dashboards:
    - kubernetes-cluster
    - kubernetes-pods
    - aws-load-balancer

• Cluster Health - Node and pod availability
• Resource Utilization - CPU, memory, storage thresholds
• Application Performance - Response time and error rates
• Security Events - Failed authentication attempts

# Network policies example
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: deny-all-ingress
spec:
  podSelector: {}
  policyTypes:
  - Ingress

• Restricted - Production workloads
• Baseline - Development environments
• Privileged - System components only

• Enterprise Deployment Guide - Complete deployment instructions
• Prerequisites Check - Validate environment setup
• Configuration Examples - Sample configurations

• Security Scanning - Automated security assessment
• Monitoring Setup - Prometheus and Grafana configuration
• Backup Validation - Backup verification procedures

• Monitoring Stack - Complete monitoring deployment
• Security Policies - Network policies and security configurations
• Ingress Configuration - Load balancer and ingress setup

• GitHub Actions - Automated testing and deployment
• Security Scanning - Vulnerability assessment
• Cost Estimation - Infrastructure cost analysis

• EKS Module - Complete EKS cluster configuration
• VPC Module - Network infrastructure
• Monitoring Module - Observability stack

• Spot Instances - 70% cost savings for fault-tolerant workloads
• Reserved Instances - Predictable workload cost reduction
• Cluster Autoscaler - Dynamic scaling based on demand
• Fargate - Serverless containers for variable workloads
• Right-sizing - Automated resource optimization

1. Fork Repository - Create your fork
2. Development Setup - Local development environment
3. Submit Pull Request - Contribute improvements

This project is licensed under the MIT License - see the LICENSE file for details.

• GitHub Issues - Bug reports and feature requests
• Discussions - Community support and Q&A
• Security Policy - Vulnerability reporting
• AWS EKS Documentation - Official AWS EKS documentation# Trigger deployment