feat: Add nginx-load-balancer example with LoadBalancer service and automatic IPv6 assignment
This commit is contained in:
mik-tf
266
examples/nginx-load-balancer/update-content-single.sh
Executable file
266
examples/nginx-load-balancer/update-content-single.sh
Executable file
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#!/bin/bash
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# Dynamic Mycelium IPv6 Address Discovery Script for NodePort
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# This script fetches Mycelium IPv6 address of the node where the pod is running
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# With externalTrafficPolicy: Local, service is only accessible on nodes with pods
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set -e
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echo "🔍 Discovering Mycelium IPv6 address for pod's node..."
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# Get the node where the nginx-nodeport pod is running
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POD_NAME=$(kubectl get pods -l app=nginx-nodeport -o name | head -1)
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if [ -z "$POD_NAME" ]; then
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echo "❌ No nginx-nodeport pod found!"
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echo "Please deploy the nginx-nodeport example first:"
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echo " kubectl apply -f nginx-nodeport-deployment.yaml"
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exit 1
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fi
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POD_NODE=$(kubectl get pods -l app=nginx-nodeport -o jsonpath='{.items[0].spec.nodeName}')
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echo "Pod is running on node: $POD_NODE"
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# Get Mycelium IPv6 address of the SPECIFIC node where pod is running
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# This is critical with externalTrafficPolicy: Local
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IPV6_ADDRESS=$(kubectl get node "$POD_NODE" -o jsonpath='{range .status.addresses[?(@.type=="InternalIP")]}{.address}{"\n"}{end}' | grep -E '^[0-9a-f]+:[0-9a-f]+:[0-9a-f]+:[0-9a-f]+:[0-9a-f]+:[0-9a-f]+:[0-9a-f]+:[0-9a-f]+$' | head -1)
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if [ -z "$IPV6_ADDRESS" ]; then
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echo "❌ No IPv6 address found for node $POD_NODE!"
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exit 1
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fi
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IPV6_ADDRESSES="$IPV6_ADDRESS"
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echo "✅ Pod's node Mycelium IPv6 address: $IPV6_ADDRESS"
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echo "⚠️ NOTE: With externalTrafficPolicy: Local, service is only accessible on THIS node"
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echo ""
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echo "To access all nodes, scale the deployment:"
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echo " kubectl scale deployment nginx-nodeport --replicas=3"
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# Generate HTML content with dynamic addresses
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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 NodePort 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: 800px;
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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.nodeport {
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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: 0.5rem 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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.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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</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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Secure NodePort Website Hosting with IPv6!
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</div>
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<div class="status nodeport">
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✅ NODEPORT SECURE
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</div>
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<div class="security-badge">
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🔒 ENHANCED SECURITY
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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>🌐 Access URL (NodePort: 30091)</h3>
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<p><strong>Your website is accessible via this Mycelium worker node IPv6 address:</strong></p>
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<ul>
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HTML_EOF
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# Add the single IPv6 address to the HTML
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while IFS= read -r ipv6; do
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echo " <li><code>http://[$ipv6]:30091</code> ✅</li>" >> /tmp/index.html
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echo " <li><strong>Node:</strong> $POD_NODE</li>" >> /tmp/index.html
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done <<< "$IPV6_ADDRESSES"
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cat >> /tmp/index.html << 'HTML_EOF'
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</ul>
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<div style="background: rgba(255, 193, 7, 0.2); padding: 1rem; border-radius: 8px; margin: 1rem 0; border-left: 4px solid #FFC107;">
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<strong>⚠️ Note:</strong> With <code>externalTrafficPolicy: Local</code>, the service is only accessible on the node where the pod is running.
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</div>
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<p><strong>To make accessible on all nodes:</strong></p>
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<pre style="text-align: left; background: rgba(0,0,0,0.3); padding: 1rem; border-radius: 4px; font-size: 0.8rem;">kubectl scale deployment nginx-nodeport --replicas=3</pre>
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<p><em>Anyone with Mycelium installed can access your website 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">🛡️ Enhanced security with network isolation</div>
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<div class="feature">🌍 Peer-to-peer global access via NodePort</div>
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<div class="feature">🔒 Standard Kubernetes service patterns</div>
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<div class="feature">⚡ Clean pod networking without hostNetwork</div>
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<div class="feature">🖥️ Multi-node Kubernetes cluster</div>
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<div class="feature">🔄 Dynamic IPv6 discovery and routing</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 NodePort Demo<br>
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Security-First 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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</body>
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</html>
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HTML_EOF
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echo "📝 Generated HTML content for pod's node: $POD_NODE"
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# Update the ConfigMap
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echo "🔄 Updating ConfigMap..."
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kubectl create configmap nginx-nodeport-content --from-file=index.html=/tmp/index.html --dry-run=client -o yaml | kubectl apply -f -
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echo "✅ Successfully updated nginx-nodeport-content ConfigMap"
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echo ""
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echo "🔄 To apply changes to running pods, restart the deployment:"
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echo " kubectl rollout restart deployment/nginx-nodeport"
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echo ""
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echo "🌐 Website will be accessible at: http://[$IPV6_ADDRESS]:30091"
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echo ""
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echo "📊 Pod's node information:"
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echo " Node: $POD_NODE"
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echo " Mycelium IPv6: $IPV6_ADDRESS"
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echo ""
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echo "⚠️ Note: Service is only accessible on this specific node"
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echo " To make accessible on all nodes, scale to 3 replicas:"
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echo " kubectl scale deployment nginx-nodeport --replicas=3"
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# Cleanup
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rm -f /tmp/index.html
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echo ""
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echo "✅ Update complete!"
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