allard
269 lines
7.6 KiB
Plaintext
269 lines
7.6 KiB
Plaintext
<!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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<title>Node Balancer</title>
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<style>
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html, body {
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margin: 0;
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padding: 0;
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min-height: 100%;
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}
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body { font-family: sans-serif; margin: 20px; }
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svg { border:1px solid #ccc; width:100%; background:#f9f9f9; }
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.node { fill:#4CAF50; stroke:#333; stroke-width:2; }
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.pod { fill:#2196F3; stroke:#000; stroke-width:1; }
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.label { font-size:14px; text-anchor:middle; dominant-baseline:middle; }
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.pod-label { font-size:14px; text-anchor:middle; dominant-baseline:middle; fill:#fff; }
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header {
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display: flex;
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align-items: center;
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margin-bottom: 20px;
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background-color: #f0f0f0; /* light gray background for the header */
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padding: 10px 15px;
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border-radius: 8px;
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}
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header .logo {
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font-weight: bold;
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font-size: 18px;
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color: #2196F3; /* blue logo text */
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margin-right: 15px;
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padding: 5px 10px;
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background-color: #333; /* dark background behind logo text */
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color: #fff;
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border-radius: 4px;
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font-family: monospace;
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}
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header .title {
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font-size: 18px;
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}
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header .title span {
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margin-left: 10px;
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color: #555;
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font-weight: normal;
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}
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header .cluster-label {
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margin-left: 20px;
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color: #333;
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font-weight: normal;
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}
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</style>
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</head>
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<body>
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<header>
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<div class="logo">allarddcs</div>
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<div class="title">
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Node Balancer <span id="version">v?</span>
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<span class="cluster-label">Cluster: <span id="cluster-name">?</span></span>
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</div>
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</header>
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<svg id="canvas"></svg>
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<script>
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const svg = document.getElementById("canvas");
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const nodePositions = {};
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const nodeY = 50;
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const nodeWidth = 100;
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const nodeHeight = 40;
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let animationDuration = 2000;
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// Store pod stacks per node
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const podsPerNode = {};
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// Fetch animation duration from server
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fetch("/api/config")
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.then(res => res.json())
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.then(cfg => {
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animationDuration = cfg.animationDurationMs;
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document.getElementById("version").textContent = "v" + cfg.version;
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document.getElementById("cluster-name").textContent = cfg.clusterName;
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});
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// Draw nodes
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fetch("/api/nodes")
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.then(res => res.json())
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.then(nodeNames => {
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nodeNames.forEach((name,i)=>{
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const x = 50 + i*200;
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nodePositions[name] = {x: x + nodeWidth/2, y: nodeY + nodeHeight/2};
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// Node box
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const rect = document.createElementNS("http://www.w3.org/2000/svg","rect");
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rect.setAttribute("x", x);
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rect.setAttribute("y", nodeY);
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rect.setAttribute("width", nodeWidth);
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rect.setAttribute("height", nodeHeight);
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rect.setAttribute("class","node");
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svg.appendChild(rect);
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// Node label
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const label = document.createElementNS("http://www.w3.org/2000/svg","text");
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label.setAttribute("x", x + nodeWidth/2);
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label.setAttribute("y", nodeY + nodeHeight/2);
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label.setAttribute("class","label");
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label.textContent = name;
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svg.appendChild(label);
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podsPerNode[name] = [];
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});
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// Fetch initial pods after nodes are drawn
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fetch("/api/pods")
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.then(res => res.json())
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.then(podsByNode => {
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for(const nodeName in podsByNode){
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podsByNode[nodeName].forEach(podName => addPod(podName, nodeName));
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}
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});
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});
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// Add a pod to the stack under a node
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function addPod(podName, nodeName){
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if(!nodePositions[nodeName]) return;
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const stack = podsPerNode[nodeName] || [];
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const index = stack.length;
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const x = nodePositions[nodeName].x - nodeWidth/2;
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const y = nodeY + nodeHeight + index*25;
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const g = document.createElementNS("http://www.w3.org/2000/svg","g");
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const rect = document.createElementNS("http://www.w3.org/2000/svg","rect");
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rect.setAttribute("x", x);
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rect.setAttribute("y", y);
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rect.setAttribute("width", nodeWidth);
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rect.setAttribute("height", 20);
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rect.setAttribute("class","pod");
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g.appendChild(rect);
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const text = document.createElementNS("http://www.w3.org/2000/svg","text");
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text.setAttribute("x", x + nodeWidth/2);
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text.setAttribute("y", y + 10); // vertical center
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text.setAttribute("class","pod-label");
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// truncate text to fit box
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const maxChars = Math.floor(nodeWidth / 8); // rough estimate
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text.textContent = podName.length > maxChars ? podName.substr(0, maxChars) : podName;
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g.appendChild(text);
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svg.appendChild(g);
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stack.push(g);
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podsPerNode[nodeName] = stack;
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updateSVGHeight();
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}
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function updateSVGHeight() {
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let maxY = nodeY + nodeHeight; // start with top node
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for (const nodeName in podsPerNode) {
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const stack = podsPerNode[nodeName];
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if (!stack) continue;
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if (stack.length === 0) continue;
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const stackHeight = stack.length * (20 + 5) +40 ; // pod height + spacing
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const bottomY = nodeY + nodeHeight + stackHeight;
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if (bottomY > maxY) maxY = bottomY;
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}
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// optional extra padding at bottom
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svg.setAttribute("height", maxY + 20);
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}
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// Animate pod moving from one node to another
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function flyPod(podName, fromNode, toNode) {
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if (!fromNode || !toNode) return;
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const fromStack = podsPerNode[fromNode];
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const idx = fromStack.findIndex(g => g.querySelector("text").textContent === podName);
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if (idx === -1) return;
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// Grab the actual pod <g> element
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const g = fromStack[idx];
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// Remove it from leaving stack array
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fromStack.splice(idx, 1);
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redrawPods(fromNode); // redraw remaining pods to close gap
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// Reparent pod to SVG root so it can move freely
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svg.appendChild(g);
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const rect = g.querySelector("rect");
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const text = g.querySelector("text");
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// Get current position
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const startX = parseFloat(rect.getAttribute("x"));
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const startY = parseFloat(rect.getAttribute("y"));
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// Calculate target position in destination stack
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const endX = nodePositions[toNode].x - nodeWidth / 2;
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const endY = nodeY + nodeHeight + podsPerNode[toNode].length * 25;
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let progress = 0;
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const steps = 60;
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const dx = (endX - startX) / steps;
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const dy = (endY - startY) / steps;
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// Animate pod
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const anim = setInterval(() => {
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progress++;
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rect.setAttribute("x", startX + dx * progress);
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rect.setAttribute("y", startY + dy * progress);
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text.setAttribute("x", startX + dx * progress + nodeWidth / 2);
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text.setAttribute("y", startY + dy * progress + 10);
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if (progress >= steps) {
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clearInterval(anim);
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// Add pod to destination stack permanently
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podsPerNode[toNode].push(g);
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// Ensure destination stack is redrawn correctly
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redrawPods(toNode);
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}
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}, animationDuration / steps);
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}
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// redraw all pods on a node (new)
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function redrawPods(nodeName){
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if(!podsPerNode[nodeName]) return;
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podsPerNode[nodeName].forEach((g, idx)=>{
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const rect = g.querySelector("rect");
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const text = g.querySelector("text");
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const x = nodePositions[nodeName].x - nodeWidth/2;
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const y = nodeY + nodeHeight + 20 + idx*25;
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rect.setAttribute("x", x);
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rect.setAttribute("y", y);
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text.setAttribute("x", x + nodeWidth/2);
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text.setAttribute("y", y + 10);
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});
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updateSVGHeight();
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}
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// SSE stream
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const evtSource = new EventSource("/api/stream");
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evtSource.onmessage = e => {
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const evt = JSON.parse(e.data);
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if(evt.fromNode === evt.toNode){
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// same node, just redraw stack
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redrawPods(evt.toNode);
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return;
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}
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if(!evt.fromNode){ // new pod appears
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addPod(evt.pod, evt.toNode);
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redrawPods(evt.toNode);
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} else { // pod moves
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flyPod(evt.pod, evt.fromNode, evt.toNode);
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}
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};
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</script>
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</body>
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</html>
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