myceliumcloud-examples/examples/nginx-nodeport/IMPLEMENTATION_COMPLETE.md

nginx-nodeport Implementation - COMPLETE ✅

Summary

The nginx-nodeport example has been successfully completed and is ready for production use. This implementation demonstrates security-first IPv6 web hosting using Kubernetes NodePort services on Mycelium Cloud.

What Was Completed

1. Service Configuration ✅

File: nginx-nodeport-service.yaml

• Changed from LoadBalancer to NodePort type
• Explicitly set nodePort: 30091 (avoiding conflict with nginx-mycelium's 30090)
• Maintained externalTrafficPolicy: Local for IPv6 source IP preservation
• Access: http://[worker-node-mycelium-ipv6]:30091

2. Content Update Script ✅

File: update-content.sh

• Created complete script for dynamic content updates
• Discovers worker node Mycelium IPv6 addresses automatically
• Generates HTML with all accessible URLs
• Updates ConfigMap and provides rollout instructions
• Made executable with proper permissions

3. Test Script Enhancement ✅

File: test-nodeport-ipv6.sh

• Enhanced validation to confirm NodePort type (not LoadBalancer)
• Validates explicit port 30091 configuration
• Comprehensive testing of all NodePort features

4. Documentation Updates ✅

File: nginx-nodeport.md

• Added clear explanation of NodePort vs hostNetwork differences
• Documented complete traffic flow: User → Node:30091 → Service:8080 → Pod:8080
• Added comprehensive flow diagrams
• Created comparison tables for all 4 nginx variants
• Clarified Mycelium access patterns
• Added security benefits and operational advantages

5. Comprehensive Nginx Variants Guide ✅

File: ../nginx-variants.md

• Created complete comparison of all 4 nginx deployment methods
• Decision tree for choosing the right variant
• Migration paths between variants
• Detailed technical specifications
• Common operations and troubleshooting

Key Architecture Points

NodePort Access Pattern

User with Mycelium
        ↓
http://[worker-node-mycelium-ipv6]:30091
        ↓
Worker Node (kube-proxy)
        ↓
NodePort 30091 → Service port 8080
        ↓
Kubernetes Service (load balances)
        ↓
Pod container port 8080
        ↓
nginx → HTML Content

Security Improvements Over hostNetwork

• ✅ Pod isolation (no hostNetwork)
• ✅ Network namespace isolation
• ✅ Resource limits enforced
• ✅ Health checks active
• ✅ Standard Kubernetes networking
• ✅ Network policies supported

Port Allocation

• External: NodePort 30091 (on all worker nodes)
• Service: Port 8080 (ClusterIP)
• Target: Pod 8080 (nginx)
• Rationale: 30091 avoids conflict with nginx-mycelium's 30090

Files Overview

File	Purpose	Status
nginx-nodeport-deployment.yaml	Pod deployment config	✅ Verified
nginx-nodeport-service.yaml	NodePort service	✅ Fixed
nginx-nodeport-configmaps.yaml	HTML & nginx config	✅ Verified
test-nodeport-ipv6.sh	Testing script	✅ Enhanced
update-content.sh	Content updater	✅ Created
nginx-nodeport.md	Complete documentation	✅ Updated
compare-approaches.md	Security comparison	✅ Existing
../nginx-variants.md	All variants guide	✅ Created

Quick Start

# 1. Deploy ConfigMaps
kubectl apply -f nginx-nodeport-configmaps.yaml

# 2. Deploy application
kubectl apply -f nginx-nodeport-deployment.yaml

# 3. Create service
kubectl apply -f nginx-nodeport-service.yaml

# 4. Wait for ready
kubectl wait --for=condition=ready pod -l app=nginx-nodeport --timeout=60s

# 5. Get worker node IPv6
NODE_IPV6=$(kubectl get nodes -o jsonpath='{.items[0].status.addresses[?(@.type=="InternalIP")].address}')

# 6. Access website
curl -6 "http://[$NODE_IPV6]:30091/"

# Or run comprehensive tests
./test-nodeport-ipv6.sh

Testing Checklist

• Service type is NodePort (not LoadBalancer)
• NodePort is explicitly set to 30091
• Pod uses hostNetwork: false (isolated)
• Resource limits are configured
• Health probes are active
• ConfigMaps mount correctly
• nginx listens on dual-stack (IPv4 + IPv6)
• Service preserves source IP (externalTrafficPolicy: Local)
• Test script validates all features
• Update script creates dynamic content
• Documentation is comprehensive

Key Differences from hostNetwork

Aspect	hostNetwork	NodePort
Pod Network	Host	Isolated
Access	[pod-ip]:8080	[node-ip]:30091
Security	Low	High
Scaling	Limited	Good
Production	No	Yes

What's Next

Future nginx Variants

1. LoadBalancer - External IP with cloud LB
2. Ingress - Domain names with SSL/TLS

Enhancements

1. Multi-replica deployment examples
2. Advanced monitoring with Prometheus
3. SSL/TLS certificate management
4. Custom domain integration

Validation

All implementation goals have been achieved:

✅ Service correctly uses NodePort with explicit port 30091 ✅ Documentation clearly explains NodePort vs hostNetwork ✅ Scripts work with correct ports and ConfigMaps ✅ Complete traffic flow is documented ✅ Comparison tables show all 4 variants ✅ Security improvements are documented ✅ Production-ready patterns implemented ✅ Comprehensive testing capabilities

Notes

• Port 30091 chosen to avoid conflict with nginx-mycelium (30090)
• NodePort range is 30000-32767 (Kubernetes standard)
• externalTrafficPolicy: Local preserves IPv6 source addresses for logging
• hostNetwork: false ensures pod isolation and security
• Works with Mycelium IPv6 addresses for global accessibility

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Implementation Date: 2025-01-07 Status: ✅ COMPLETE AND PRODUCTION-READY Tested: Yes Documentation: Complete Next: LoadBalancer and Ingress variants