allard
363 lines
10 KiB
HTML
363 lines
10 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<meta charset="UTF-8">
|
|
<title>Node Balancer</title>
|
|
|
|
<style>
|
|
|
|
html, body {
|
|
margin: 0;
|
|
padding: 0;
|
|
min-height: 100%;
|
|
}
|
|
|
|
body { font-family: sans-serif; margin: 20px; }
|
|
|
|
svg { border:1px solid #ccc; width:100%; background:#f9f9f9; }
|
|
.node { fill:#4CAF50; stroke:#333; stroke-width:2; }
|
|
.pod { fill:#2196F3; stroke:#000; stroke-width:1; }
|
|
.label { font-size:14px; text-anchor:middle; dominant-baseline:middle; }
|
|
.pod-label { font-size:14px; text-anchor:middle; fill:#fff; }
|
|
|
|
header {
|
|
display: flex;
|
|
align-items: center;
|
|
margin-bottom: 20px;
|
|
background-color: #f0f0f0;
|
|
padding: 10px 15px;
|
|
border-radius: 8px;
|
|
}
|
|
header .logo {
|
|
font-weight: bold;
|
|
font-size: 18px;
|
|
color: #2196F3;
|
|
margin-right: 15px;
|
|
padding: 5px 10px;
|
|
background-color: #333;
|
|
color: #fff;
|
|
border-radius: 4px;
|
|
font-family: monospace;
|
|
}
|
|
header .title {
|
|
font-size: 18px;
|
|
}
|
|
header .title span {
|
|
margin-left: 10px;
|
|
color: #555;
|
|
font-weight: normal;
|
|
}
|
|
header .cluster-label {
|
|
margin-left: 20px;
|
|
color: #333;
|
|
font-weight: normal;
|
|
}
|
|
|
|
</style>
|
|
</head>
|
|
<body>
|
|
|
|
<header>
|
|
<div class="logo">allarddcs</div>
|
|
<div class="title">
|
|
Node Balancer <span id="version">v?</span>
|
|
<span class="cluster-label">Cluster: <span id="cluster-name">?</span></span>
|
|
</div>
|
|
</header>
|
|
<svg id="canvas"></svg>
|
|
<script>
|
|
const svg = document.getElementById("canvas");
|
|
|
|
// Node/pod layout constants
|
|
const nodePositions = {};
|
|
const nodeY = 50;
|
|
let nodeWidth = 120;
|
|
const nodeHeight = 55;
|
|
const podHeight = 48;
|
|
const podSpacing = 6;
|
|
const textPaddingY = 6;
|
|
|
|
let animationDuration = 2000;
|
|
const podsPerNode = {};
|
|
|
|
// Fetch config
|
|
fetch("/api/config")
|
|
.then(res => res.json())
|
|
.then(cfg => {
|
|
animationDuration = cfg.animationDurationMs;
|
|
document.getElementById("version").textContent = "v" + cfg.version;
|
|
document.getElementById("cluster-name").textContent = cfg.clusterName;
|
|
});
|
|
|
|
// Remove trailing k8s-style hash if present
|
|
function truncatePodName(podName) {
|
|
const parts = podName.split("-");
|
|
function isPodId(seg) { return /^[a-z0-9]{5}$/.test(seg); }
|
|
function isReplicaSetHash(seg) { return /^[a-f0-9]{8,10}$/.test(seg); }
|
|
if (parts.length > 1 && isPodId(parts[parts.length - 1])) parts.pop();
|
|
if (parts.length > 1 && isReplicaSetHash(parts[parts.length - 1])) parts.pop();
|
|
return parts.join("-");
|
|
}
|
|
|
|
// Split pod name into multiple lines
|
|
function splitPodNameLines(podName, maxCharsPerLine = 16) {
|
|
const parts = podName.split("-");
|
|
const lines = [];
|
|
let currentLine = "";
|
|
|
|
for (let i = 0; i < parts.length; i++) {
|
|
const part = parts[i];
|
|
const isLastPart = i === parts.length - 1;
|
|
|
|
if (currentLine.length === 0) {
|
|
currentLine = part;
|
|
continue;
|
|
}
|
|
|
|
const candidate = currentLine + "-" + part;
|
|
|
|
if (candidate.length <= maxCharsPerLine) {
|
|
currentLine = candidate;
|
|
} else {
|
|
// finalize current line with dash (since more parts follow)
|
|
lines.push(currentLine + "-");
|
|
currentLine = part;
|
|
}
|
|
}
|
|
|
|
// last line never gets trailing dash
|
|
if (currentLine.length > 0) {
|
|
lines.push(currentLine);
|
|
}
|
|
|
|
return lines;
|
|
}
|
|
|
|
// Draw a node (responsive)
|
|
function addNode(name, index, totalNodes){
|
|
const svgWidth = svg.clientWidth || window.innerWidth;
|
|
|
|
const outerPadding = 60; // distance from canvas edge
|
|
const innerMargin = 20; // breathing space inside edges
|
|
|
|
const usableWidth = svgWidth - 2 * outerPadding;
|
|
const spacing = totalNodes > 1
|
|
? usableWidth / totalNodes
|
|
: 0;
|
|
|
|
// Optional responsive node width scaling
|
|
const maxNodeWidth = 120;
|
|
const minNodeWidth = 60;
|
|
nodeWidth = Math.max(minNodeWidth, Math.min(maxNodeWidth, spacing * 0.8));
|
|
|
|
// Center nodes within their spacing slot
|
|
const centerX = outerPadding + spacing * index + spacing / 2;
|
|
|
|
const x = centerX - nodeWidth / 2;
|
|
|
|
nodePositions[name] = {
|
|
x: centerX,
|
|
y: nodeY + nodeHeight/2
|
|
};
|
|
|
|
// Node rectangle
|
|
const rect = document.createElementNS("http://www.w3.org/2000/svg","rect");
|
|
rect.setAttribute("x", x);
|
|
rect.setAttribute("y", nodeY);
|
|
rect.setAttribute("width", nodeWidth);
|
|
rect.setAttribute("height", nodeHeight);
|
|
rect.setAttribute("class","node");
|
|
svg.appendChild(rect);
|
|
|
|
// Node label
|
|
const label = document.createElementNS("http://www.w3.org/2000/svg","text");
|
|
label.setAttribute("x", centerX);
|
|
label.setAttribute("y", nodeY + nodeHeight/2);
|
|
label.setAttribute("class","label");
|
|
label.setAttribute("text-anchor","middle");
|
|
label.setAttribute("dominant-baseline","middle");
|
|
label.textContent = name;
|
|
svg.appendChild(label);
|
|
|
|
podsPerNode[name] = [];
|
|
}
|
|
|
|
// Add a pod
|
|
function addPod(podName, nodeName){
|
|
if(!nodePositions[nodeName]) return;
|
|
|
|
const stack = podsPerNode[nodeName] || [];
|
|
const index = stack.length;
|
|
|
|
const x = nodePositions[nodeName].x - nodeWidth/2;
|
|
// const y = nodeY + nodeHeight + index*(podHeight + podSpacing);
|
|
const y = nodeY + nodeHeight + podSpacing + index * (podHeight + podSpacing);
|
|
|
|
const g = document.createElementNS("http://www.w3.org/2000/svg","g");
|
|
g.dataset.podName = podName;
|
|
|
|
// Pod rectangle
|
|
const rect = document.createElementNS("http://www.w3.org/2000/svg","rect");
|
|
rect.setAttribute("x", x);
|
|
rect.setAttribute("y", y);
|
|
rect.setAttribute("width", nodeWidth);
|
|
rect.setAttribute("height", podHeight);
|
|
rect.setAttribute("class","pod");
|
|
g.appendChild(rect);
|
|
|
|
// Pod label
|
|
const text = document.createElementNS("http://www.w3.org/2000/svg","text");
|
|
text.setAttribute("class","pod-label");
|
|
text.setAttribute("text-anchor","middle");
|
|
text.setAttribute("x", x + nodeWidth/2);
|
|
|
|
const truncated = truncatePodName(podName);
|
|
const lines = splitPodNameLines(truncated, 14);
|
|
|
|
if(lines.length === 1){
|
|
// Single line: vertically centered
|
|
text.setAttribute("y", y + podHeight/2 + textPaddingY/2);
|
|
text.setAttribute("dominant-baseline","middle");
|
|
text.textContent = lines[0];
|
|
} else {
|
|
// Multi-line
|
|
const lineHeight = 12;
|
|
const totalTextHeight = lines.length * lineHeight;
|
|
|
|
// Center block vertically inside pod
|
|
const startY = y + (podHeight - totalTextHeight)/2 + lineHeight - 2;
|
|
|
|
text.setAttribute("y", startY);
|
|
|
|
lines.forEach((line, i) => {
|
|
const tspan = document.createElementNS("http://www.w3.org/2000/svg","tspan");
|
|
tspan.setAttribute("x", x + nodeWidth/2);
|
|
tspan.setAttribute("dy", i === 0 ? "0" : lineHeight);
|
|
tspan.textContent = line;
|
|
text.appendChild(tspan);
|
|
});
|
|
}
|
|
|
|
g.appendChild(text);
|
|
svg.appendChild(g);
|
|
|
|
stack.push(g);
|
|
podsPerNode[nodeName] = stack;
|
|
|
|
updateSVGHeight();
|
|
}
|
|
|
|
// Update SVG height
|
|
function updateSVGHeight() {
|
|
let maxY = nodeY + nodeHeight;
|
|
for(const nodeName in podsPerNode){
|
|
const stack = podsPerNode[nodeName];
|
|
if(!stack || stack.length===0) continue;
|
|
const bottomY = nodeY + nodeHeight + stack.length*(podHeight + podSpacing);
|
|
if(bottomY > maxY) maxY = bottomY;
|
|
}
|
|
svg.setAttribute("height", maxY + 20);
|
|
}
|
|
|
|
// Animate pod move
|
|
function flyPod(podName, fromNode, toNode){
|
|
if(!fromNode || !toNode) return;
|
|
const fromStack = podsPerNode[fromNode];
|
|
const idx = fromStack.findIndex(g => g.dataset.podName===podName);
|
|
if(idx===-1) return;
|
|
|
|
const g = fromStack[idx];
|
|
fromStack.splice(idx,1);
|
|
redrawPods(fromNode);
|
|
svg.appendChild(g);
|
|
|
|
const rect = g.querySelector("rect");
|
|
const text = g.querySelector("text");
|
|
|
|
const startX = parseFloat(rect.getAttribute("x"));
|
|
const startY = parseFloat(rect.getAttribute("y"));
|
|
const endX = nodePositions[toNode].x - nodeWidth/2;
|
|
const endY = nodeY + nodeHeight + podsPerNode[toNode].length*(podHeight+podSpacing);
|
|
|
|
let progress = 0;
|
|
const steps = 60;
|
|
const dx = (endX - startX)/steps;
|
|
const dy = (endY - startY)/steps;
|
|
|
|
const anim = setInterval(()=>{
|
|
progress++;
|
|
const nx = startX + dx*progress;
|
|
const ny = startY + dy*progress;
|
|
|
|
rect.setAttribute("x", nx);
|
|
rect.setAttribute("y", ny);
|
|
text.setAttribute("x", nx + nodeWidth/2);
|
|
text.setAttribute("y", ny + podHeight/2 + textPaddingY/2);
|
|
|
|
if(progress>=steps){
|
|
clearInterval(anim);
|
|
podsPerNode[toNode].push(g);
|
|
redrawPods(toNode);
|
|
}
|
|
}, animationDuration/steps);
|
|
}
|
|
|
|
// Redraw pods on a node
|
|
function redrawPods(nodeName){
|
|
if(!podsPerNode[nodeName]) return;
|
|
podsPerNode[nodeName].forEach((g,idx)=>{
|
|
const rect = g.querySelector("rect");
|
|
const text = g.querySelector("text");
|
|
const x = nodePositions[nodeName].x - nodeWidth/2;
|
|
const y = nodeY + nodeHeight + idx*(podHeight+podSpacing);
|
|
rect.setAttribute("x", x);
|
|
rect.setAttribute("y", y);
|
|
text.setAttribute("x", x + nodeWidth/2);
|
|
text.setAttribute("y", y + podHeight/2 + textPaddingY/2);
|
|
});
|
|
updateSVGHeight();
|
|
}
|
|
|
|
// Fetch authoritative cluster state and redraw
|
|
function refreshCluster(){
|
|
Promise.all([
|
|
fetch("/api/nodes").then(r=>r.json()),
|
|
fetch("/api/pods").then(r=>r.json())
|
|
]).then(([nodeNames, podsByNode])=>{
|
|
while(svg.firstChild) svg.removeChild(svg.firstChild);
|
|
|
|
for(const k in nodePositions) delete nodePositions[k];
|
|
for(const k in podsPerNode) delete podsPerNode[k];
|
|
|
|
nodeNames.forEach((name,i)=>addNode(name,i,nodeNames.length));
|
|
for(const nodeName in podsByNode){
|
|
podsByNode[nodeName].forEach(podName=>addPod(podName,nodeName));
|
|
}
|
|
updateSVGHeight();
|
|
});
|
|
}
|
|
|
|
// SSE events
|
|
const evtSource = new EventSource("/api/stream");
|
|
evtSource.onmessage = e=>{
|
|
const evt = JSON.parse(e.data);
|
|
if(evt.fromNode && evt.toNode && evt.fromNode !== evt.toNode){
|
|
flyPod(evt.pod, evt.fromNode, evt.toNode);
|
|
setTimeout(refreshCluster, animationDuration);
|
|
} else {
|
|
refreshCluster();
|
|
}
|
|
};
|
|
|
|
// Periodic refresh every 5s
|
|
setInterval(refreshCluster, 5000);
|
|
|
|
// Responsive redraw on resize
|
|
window.addEventListener("resize", refreshCluster);
|
|
|
|
// Initial load
|
|
refreshCluster();
|
|
</script>
|
|
</body>
|
|
</html>
|