feat: Add nginx-load-balancer example with LoadBalancer service and automatic IPv6 assignment
This commit is contained in:
mik-tf
344
examples/nginx-load-balancer/update-content-load-balancer.sh
Executable file
344
examples/nginx-load-balancer/update-content-load-balancer.sh
Executable file
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#!/bin/bash
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# LoadBalancer Content Update Script for nginx-load-balancer
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# This script updates content showing the LoadBalancer service's IPv6 address
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set -e
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echo "🔍 Discovering LoadBalancer service information..."
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# Check if service exists
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if ! kubectl get svc nginx-load-balancer-service &> /dev/null; then
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echo "❌ nginx-load-balancer-service not found!"
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echo "Please deploy the nginx-load-balancer example first:"
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echo " kubectl apply -f nginx-load-balancer-deployment.yaml"
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exit 1
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fi
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# Get service information
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SERVICE_IP=$(kubectl get svc nginx-load-balancer-service -o jsonpath='{.status.loadBalancer.ingress[0].ip}' 2>/dev/null || echo "Pending")
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SERVICE_TYPE=$(kubectl get svc nginx-load-balancer-service -o jsonpath='{.spec.type}' 2>/dev/null || echo "Unknown")
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echo "Service type: $SERVICE_TYPE"
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echo "External IP: $SERVICE_IP"
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if [ "$SERVICE_TYPE" != "LoadBalancer" ]; then
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echo "❌ Service is not a LoadBalancer type!"
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exit 1
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fi
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if [ -z "$SERVICE_IP" ] || [ "$SERVICE_IP" = "Pending" ] || [ "$SERVICE_IP" = "null" ]; then
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echo "⏳ External IP not yet assigned. Mycelium may be assigning IPv6 address..."
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echo "This is normal - LoadBalancer services get their IPv6 from Mycelium automatically"
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echo "Check service status with: kubectl get svc nginx-load-balancer-service"
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# We'll still create content but note that IP is pending
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SERVICE_IP="[pending-myelium-assignment]"
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else
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echo "✅ LoadBalancer service has IPv6: $SERVICE_IP"
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fi
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# Get pod count for display
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POD_COUNT=$(kubectl get pods -l app=nginx-load-balancer --no-headers | wc -l)
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echo "Running pods: $POD_COUNT/3"
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# Generate HTML content for LoadBalancer
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cat > /tmp/index.html << 'HTML_EOF'
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Mycelium Cloud - Nginx LoadBalancer Website</title>
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<meta http-equiv="refresh" content="30">
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<style>
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body {
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font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
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margin: 0;
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padding: 0;
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
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color: white;
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min-height: 100vh;
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display: flex;
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justify-content: center;
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align-items: center;
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}
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.container {
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text-align: center;
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max-width: 900px;
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padding: 2rem;
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background: rgba(255, 255, 255, 0.1);
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border-radius: 20px;
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backdrop-filter: blur(10px);
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box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
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}
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h1 {
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font-size: 3rem;
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margin-bottom: 1rem;
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text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
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}
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.subtitle {
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font-size: 1.2rem;
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margin-bottom: 2rem;
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opacity: 0.9;
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}
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.ipv6-info {
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background: rgba(255, 255, 255, 0.1);
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padding: 1rem;
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border-radius: 10px;
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margin: 1rem 0;
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font-family: 'Courier New', monospace;
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font-size: 0.9rem;
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}
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.status {
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display: inline-block;
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padding: 0.5rem 1rem;
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background: #4CAF50;
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border-radius: 25px;
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font-weight: bold;
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margin: 0.5rem;
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}
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.status.loadbalancer {
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background: #2196F3;
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}
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.timestamp {
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font-size: 0.8rem;
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opacity: 0.7;
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margin-top: 1rem;
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}
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.features {
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text-align: left;
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margin: 2rem 0;
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}
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.feature {
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margin: 0.5rem 0;
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padding: 0.5rem;
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background: rgba(255, 255, 255, 0.1);
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border-radius: 5px;
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}
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.security-badge {
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background: #FF9800;
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color: white;
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padding: 0.5rem 1rem;
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border-radius: 15px;
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font-weight: bold;
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margin: 1rem;
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display: inline-block;
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}
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.urls {
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background: rgba(255, 255, 255, 0.15);
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padding: 1.5rem;
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border-radius: 10px;
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margin: 1.5rem 0;
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text-align: left;
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}
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.urls h3 {
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margin-top: 0;
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color: #FFD700;
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}
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.urls ul {
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list-style: none;
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padding: 0;
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}
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.urls li {
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margin: 1rem 0;
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font-family: 'Courier New', monospace;
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font-size: 0.9rem;
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background: rgba(255, 255, 255, 0.1);
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padding: 0.8rem;
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border-radius: 6px;
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}
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.urls code {
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background: rgba(0, 0, 0, 0.3);
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padding: 0.3rem 0.6rem;
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border-radius: 4px;
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display: inline-block;
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}
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.working {
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color: #4CAF50;
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font-weight: bold;
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}
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.pending {
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color: #FFA726;
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font-weight: bold;
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}
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.node-info {
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font-size: 0.8rem;
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opacity: 0.8;
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margin-top: 0.5rem;
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}
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.load-balancing-badge {
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background: #4CAF50;
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color: white;
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padding: 0.5rem 1rem;
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border-radius: 15px;
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font-weight: bold;
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margin: 1rem;
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display: inline-block;
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}
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.info-badge {
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background: #2196F3;
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color: white;
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padding: 0.5rem 1rem;
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border-radius: 15px;
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font-weight: bold;
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margin: 0.5rem;
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display: inline-block;
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}
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</style>
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<script>
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function updateTimestamp() {
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const now = new Date();
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document.getElementById('timestamp').textContent =
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'Last updated: ' + now.toLocaleString();
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}
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function getIPv6Address() {
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// Extract IPv6 from the current connection
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const ipv6Pattern = /\[([0-9a-f:]+)\]/;
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const match = window.location.href.match(ipv6Pattern);
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if (match) {
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document.getElementById('current-ipv6').textContent = match[1];
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} else {
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document.getElementById('current-ipv6').textContent = 'Not accessed via IPv6';
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}
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}
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window.onload = function() {
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updateTimestamp();
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getIPv6Address();
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setInterval(updateTimestamp, 1000);
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};
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</script>
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</head>
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<body>
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<div class="container">
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<h1>🌐 Mycelium Cloud</h1>
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<div class="subtitle">
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LoadBalancer Website Hosting with Automatic IPv6 Assignment!
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</div>
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<div class="status loadbalancer">
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✅ LOADBALANCER SECURE
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</div>
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<div class="load-balancing-badge">
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⚖️ AUTOMATIC LOAD BALANCING
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</div>
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<div class="info-badge">
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ℹ️ 3 REPLICA DEPLOYMENT
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</div>
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<div class="ipv6-info">
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<strong>Connected via IPv6:</strong><br>
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<span id="current-ipv6">Loading...</span>
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</div>
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<div class="urls">
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<h3>🌐 Service Endpoint (LoadBalancer: 8080)</h3>
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<p><strong>Mycelium automatically assigns IPv6 address to LoadBalancer service:</strong></p>
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<ul>
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<li>
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<code>http://[SERVICE_IP]:8080</code>
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<span id="service-status" class="pending">⏳ PENDING</span>
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<div class="node-info">Automatic IPv6 assignment from Mycelium LoadBalancer</div>
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</li>
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</ul>
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<div id="status-message" style="background: rgba(255, 167, 38, 0.2); padding: 1rem; border-radius: 8px; margin: 1rem 0; border-left: 4px solid #FFA726;">
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<strong>ℹ️ Load Balancer Status:</strong> Mycelium is assigning IPv6 address to the service<br>
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This may take a few moments. Check status with: <code>kubectl get svc nginx-load-balancer-service</code>
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</div>
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<div style="background: rgba(76, 175, 80, 0.2); padding: 1rem; border-radius: 8px; margin: 1rem 0; border-left: 4px solid #4CAF50;">
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<strong>✅ Load Balancing:</strong> Traffic automatically distributed across 3 replicas<br>
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Service type: LoadBalancer with externalTrafficPolicy: Local
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</div>
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<p><em>Once IPv6 is assigned, anyone with Mycelium can access from anywhere!</em></p>
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</div>
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<div class="features">
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<h3>🚀 Key Features:</h3>
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<div class="feature">⚖️ Automatic load balancing across 3 replicas</div>
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<div class="feature">🛡️ Enhanced security with network isolation</div>
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<div class="feature">🌍 Global access via Mycelium IPv6 service endpoints</div>
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<div class="feature">🔒 Standard Kubernetes LoadBalancer patterns</div>
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<div class="feature">⚡ Clean pod networking without hostNetwork</div>
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<div class="feature">🖥️ Multi-replica, multi-node Kubernetes cluster</div>
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<div class="feature">🔄 Dynamic IPv6 service endpoint assignment</div>
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</div>
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<div class="timestamp" id="timestamp">
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Loading timestamp...
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</div>
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<div style="margin-top: 2rem; font-size: 0.8rem;">
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Mycelium Cloud LoadBalancer Demo<br>
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Production-Ready IPv6 Website Hosting<br>
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<strong>Auto-updated every 30 seconds</strong>
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</div>
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</div>
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<script>
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// Update service status based on current information
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const serviceIp = "SERVICE_IP_PLACEHOLDER";
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const podCount = POD_COUNT_PLACEHOLDER;
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if (serviceIp && serviceIp !== "Pending" && serviceIp !== "[pending-myelium-assignment]") {
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document.getElementById('service-status').innerHTML = '<span class="working">✅ WORKING</span>';
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document.getElementById('service-status').className = 'working';
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document.querySelector('code').innerHTML = 'http://[' + serviceIp + ']:8080';
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document.getElementById('status-message').innerHTML =
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'<strong>✅ Load Balancer Ready:</strong> IPv6 address assigned successfully<br>Service is now accessible at the IPv6 address above';
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document.getElementById('status-message').style.borderLeft = '4px solid #4CAF50';
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document.getElementById('status-message').style.background = 'rgba(76, 175, 80, 0.2)';
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}
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</script>
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</body>
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</html>
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HTML_EOF
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# Replace placeholders
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sed -i "s/SERVICE_IP_PLACEHOLDER/$SERVICE_IP/g" /tmp/index.html
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sed -i "s/POD_COUNT_PLACEHOLDER/$POD_COUNT/g" /tmp/index.html
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echo "📝 Generated HTML content for LoadBalancer service"
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# Update the ConfigMap
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echo "🔄 Updating ConfigMap..."
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kubectl create configmap nginx-load-balancer-content --from-file=index.html=/tmp/index.html --dry-run=client -o yaml | kubectl apply -f -
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echo "✅ Successfully updated nginx-load-balancer-content ConfigMap"
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echo ""
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echo "🔄 To apply changes to running pods, restart the deployment:"
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echo " kubectl rollout restart deployment/nginx-load-balancer"
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echo ""
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if [ -n "$SERVICE_IP" ] && [ "$SERVICE_IP" != "Pending" ] && [ "$SERVICE_IP" != "null" ]; then
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echo "🌐 LoadBalancer service accessible at: http://[$SERVICE_IP]:8080"
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echo ""
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echo "📊 Service information:"
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echo " Service type: $SERVICE_TYPE"
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echo " External IP: $SERVICE_IP"
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echo " Pods running: $POD_COUNT/3"
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echo " Load balancing: Active across all replicas"
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else
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echo "⏳ LoadBalancer IPv6 assignment in progress..."
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echo " Service type: $SERVICE_TYPE"
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echo " Pods running: $POD_COUNT/3"
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echo " Status: Mycelium assigning IPv6 address"
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echo ""
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echo " Check progress with:"
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echo " kubectl get svc nginx-load-balancer-service"
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fi
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echo ""
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echo "🔧 Management commands:"
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echo " Check pods: kubectl get pods -l app=nginx-load-balancer"
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echo " Scale replicas: kubectl scale deployment nginx-load-balancer --replicas=5"
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echo " Service status: kubectl get svc nginx-load-balancer-service"
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echo ""
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# Cleanup
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rm -f /tmp/index.html
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echo "✅ LoadBalancer content update complete!"
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