allard
194 lines
5.9 KiB
Plaintext
194 lines
5.9 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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body { font-family: sans-serif; margin: 20px; }
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svg { border:1px solid #ccc; width:100%; height:500px; 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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</style>
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</head>
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<body>
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<h2>Node Balancer</h2>
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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 => { animationDuration = cfg.animationDurationMs; });
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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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}
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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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// Remove pod from fromNode stack
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if (fromNode && podsPerNode[fromNode]) {
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podsPerNode[fromNode] = podsPerNode[fromNode].filter(g => {
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const text = g.querySelector("text");
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return text && text.textContent !== podName;
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});
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redrawPods(fromNode);
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}
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// Add pod to toNode stack (temporarily for animation)
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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("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.textContent = podName;
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g.appendChild(text);
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svg.appendChild(g);
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let start = nodePositions[fromNode] || nodePositions[toNode];
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let end = nodePositions[toNode];
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if(!start || !end) return;
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let progress = 0;
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const steps = 60;
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const dx = (end.x - start.x)/steps;
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const dy = (end.y - start.y)/steps;
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const anim = setInterval(()=>{
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progress++;
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const x = start.x - nodeWidth/2 + dx*progress;
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const y = start.y + dy*progress;
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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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if(progress>=steps){
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clearInterval(anim);
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svg.removeChild(g);
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// Add the pod to the toNode stack permanently
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addPod(podName, 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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}
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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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