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@@ -0,0 +1,399 @@
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"use strict";
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const REFRESH_MS = 1000;
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const SVG_NS = "http://www.w3.org/2000/svg";
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const PAD = 24;
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const CARD_W = 280;
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const CARD_H = 168;
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const CARD_GAP = 16;
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const BUS_GUTTER = 14;
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const NARROW_WIDTH = 360;
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const NARROW_BELOW = 640;
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const CHIP_HEIGHT = 17;
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const CHIP_GAP = 5;
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const CHIP_LINES = 2;
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const CENTER_W = 170;
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const CENTER_MAX_ROWS = 2;
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const CENTER_ROW = 24;
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function address(member) {
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return member.ip + ":" + member.port;
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}
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function roleStates(payload) {
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const alive = payload.members.filter((member) => member.alive);
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return payload.roles.map((role) => {
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const holders = alive.filter((member) => member.roles.includes(role.name)).map(address).sort();
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let state;
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if (role.required === null) {
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state = "general";
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} else if (holders.length < role.required) {
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state = "unmet";
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} else if (holders.length > role.required) {
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state = "duplicate";
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} else {
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state = "held";
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}
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return Object.assign({}, role, { holders: holders, state: state });
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});
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}
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function shorten(text, limit) {
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return text.length > limit ? text.slice(0, limit - 1) + "…" : text;
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}
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function formatAge(seconds) {
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seconds = Math.floor(seconds);
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if (seconds < 60) return seconds + "s";
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if (seconds < 3600) return Math.floor(seconds / 60) + "m" + String(seconds % 60).padStart(2, "0") + "s";
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return Math.floor(seconds / 3600) + "h" + String(Math.floor((seconds % 3600) / 60)).padStart(2, "0") + "m";
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}
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function formatSize(gb) {
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if (gb >= 1000) return (gb / 1024).toFixed(1) + " TB";
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if (gb >= 100) return Math.round(gb) + " GB";
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return gb.toFixed(1) + " GB";
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}
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function formatUptime(hours) {
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if (hours < 1) return Math.round(hours * 60) + "m";
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if (hours < 48) return Math.round(hours) + "h";
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return Math.floor(hours / 24) + "d " + Math.round(hours % 24) + "h";
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}
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function percent(used, total) {
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return total > 0 ? Math.max(0, Math.min(100, Math.round((100 * used) / total))) : null;
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}
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function barLevel(pct) {
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return pct >= 90 ? "crit" : pct >= 75 ? "warn" : "ok";
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}
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function describeStats(stats) {
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stats = stats || {};
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const num = (key) => (typeof stats[key] === "number" ? stats[key] : null);
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const cpuPercent = num("cpu_percent");
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const cores = num("cpu_cores");
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const threads = num("cpu_threads");
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let cpuText = null;
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if (cpuPercent !== null) {
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cpuText = Math.round(cpuPercent) + "%";
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if (cores && threads) cpuText += " · " + cores + "C/" + threads + "T";
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else if (threads) cpuText += " · " + threads + "T";
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}
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const usage = (usedKey, totalKey) => {
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const used = num(usedKey);
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const total = num(totalKey);
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if (used === null || total === null) return null;
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return { pct: percent(used, total), text: formatSize(used) + " / " + formatSize(total) };
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};
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const gpuCount = num("gpu_count");
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const gpuUsage = usage("gpu_mem_used_gb", "gpu_mem_total_gb");
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const uptime = num("uptime_hours");
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const cpu = cpuText === null ? null : { pct: Math.round(cpuPercent), text: cpuText };
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const ram = usage("mem_used_gb", "mem_total_gb");
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const disk = usage("disk_used_gb", "disk_total_gb");
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const gpu = gpuCount && gpuUsage ? (gpuCount > 1 ? gpuCount + "× " : "") + "GPU " + gpuUsage.text : null;
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const footer = [uptime === null ? null : "up " + formatUptime(uptime), gpu].filter(Boolean).join(" · ");
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return { cpu: cpu, ram: ram, disk: disk, gpu: gpu, uptime: uptime, footer: cpu || ram || disk ? footer : "no stats reported (older version?)" };
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}
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function alerts(payload) {
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const states = roleStates(payload);
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const out = [];
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const unmet = states.filter((role) => role.state === "unmet").map((role) => role.name);
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const twice = states.filter((role) => role.state === "duplicate").map((role) => role.name);
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const down = payload.members.filter((member) => !member.alive).map((member) => member.hostname);
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if (unmet.length) out.push({ level: "bad", text: "Unmet: " + unmet.join(", ") });
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if (twice.length) out.push({ level: "warn", text: "Held twice: " + twice.join(", ") });
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if (down.length) out.push({ level: "info", text: "Down: " + down.join(", ") });
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return out;
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}
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function summarize(payload) {
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const states = roleStates(payload);
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const alive = payload.members.filter((member) => member.alive).length;
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const down = payload.members.length - alive;
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const assigned = states.filter((role) => role.state !== "general");
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const held = assigned.filter((role) => role.state !== "unmet");
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let text = alive + " node" + (alive === 1 ? "" : "s") + " alive";
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if (down) text += " · " + down + " down";
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text += " · " + held.length + "/" + assigned.length + " roles held";
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return text;
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}
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function nodeRoles(payload, member) {
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const states = new Map(roleStates(payload).map((role) => [role.name, role]));
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const known = payload.roles.map((role) => role.name).filter((name) => member.roles.includes(name));
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const unknown = member.roles.filter((name) => !states.has(name)).sort();
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const kind = (name) => (states.has(name) ? states.get(name).state : "unknown");
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const rank = (name) => (kind(name) === "general" ? 1 : 0);
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return known
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.concat(unknown)
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.map((name, index) => ({ text: name, kind: kind(name), order: index }))
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.sort((a, b) => rank(a.text) - rank(b.text) || a.order - b.order)
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.map((entry) => ({ text: entry.text, kind: entry.kind }));
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}
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function chipWidth(text) {
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return Math.round(text.length * 6.3) + 14;
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}
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function chipLayout(labels, maxWidth, maxLines) {
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const chips = [];
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let line = 0;
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let x = 0;
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let shown = 0;
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for (const label of labels) {
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const width = chipWidth(label.text);
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const wraps = x > 0 && x + width > maxWidth;
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if ((wraps ? line + 1 : line) >= maxLines) break;
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if (wraps) {
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line += 1;
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x = 0;
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}
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chips.push({ text: label.text, kind: label.kind, x: x, line: line, w: width });
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x += width + CHIP_GAP;
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shown += 1;
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}
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let hidden = labels.length - shown;
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if (hidden > 0) {
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for (;;) {
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const text = "+" + hidden;
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const width = chipWidth(text);
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const last = chips[chips.length - 1];
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const at = last ? last.x + last.w + CHIP_GAP : 0;
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if (!last || at + width <= maxWidth) {
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chips.push({ text: text, kind: "more", x: at, line: maxLines - 1, w: width });
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break;
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}
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chips.pop();
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hidden += 1;
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}
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}
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return chips;
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}
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function layout(payload, narrow) {
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const members = payload.members;
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const count = members.length;
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const unmet = roleStates(payload).filter((role) => role.state === "unmet").map((role) => role.name);
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const cards = [];
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const links = [];
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let width;
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let height;
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let center = null;
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if (narrow) {
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width = NARROW_WIDTH;
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const cardW = width - 2 * PAD - BUS_GUTTER;
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members.forEach((member, index) => {
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const y = PAD + index * (CARD_H + CARD_GAP);
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cards.push({ member: member, key: address(member), x: PAD + BUS_GUTTER, y: y, w: cardW, h: CARD_H, cx: PAD + BUS_GUTTER + cardW / 2, cy: y + CARD_H / 2 });
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});
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height = PAD * 2 + count * CARD_H + (count - 1) * CARD_GAP;
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const busX = PAD / 2;
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if (count > 1) {
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links.push({ x1: busX, y1: cards[0].cy, x2: busX, y2: cards[count - 1].cy, kind: "link" });
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}
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cards.forEach((card) => {
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links.push({ x1: busX, y1: card.cy, x2: card.x, y2: card.cy, kind: card.member.alive ? "link" : "down" });
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});
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} else {
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const rx = count <= 1 ? 0 : Math.max(280, count * 70);
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const ry = count <= 2 ? 0 : Math.max(200, count * 50);
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const start = count === 2 ? Math.PI : count % 2 === 0 ? -Math.PI / 2 + Math.PI / count : -Math.PI / 2;
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members.forEach((member, index) => {
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const angle = start + (2 * Math.PI * index) / count;
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const centerX = rx * Math.cos(angle);
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const centerY = ry * Math.sin(angle);
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cards.push({ member: member, key: address(member), x: centerX - CARD_W / 2, y: centerY - CARD_H / 2, w: CARD_W, h: CARD_H, cx: centerX, cy: centerY });
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});
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const left = Math.min.apply(null, cards.map((card) => card.x)) - PAD;
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const top = Math.min.apply(null, cards.map((card) => card.y)) - PAD;
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width = Math.max.apply(null, cards.map((card) => card.x + card.w)) + PAD - left;
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height = Math.max.apply(null, cards.map((card) => card.y + card.h)) + PAD - top;
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cards.forEach((card) => {
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card.x -= left;
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card.y -= top;
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card.cx -= left;
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card.cy -= top;
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});
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const cx = -left;
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const cy = -top;
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const alive = cards.filter((card) => card.member.alive);
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for (let i = 0; i < alive.length; i++) {
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for (let j = i + 1; j < alive.length; j++) {
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links.push({ x1: alive[i].cx, y1: alive[i].cy, x2: alive[j].cx, y2: alive[j].cy, kind: "link" });
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}
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}
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const viewer = cards.find((card) => card.member.self);
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cards.filter((card) => !card.member.alive).forEach((card) => {
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if (viewer) links.push({ x1: viewer.cx, y1: viewer.cy, x2: card.cx, y2: card.cy, kind: "down" });
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});
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if (count >= 3) {
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const rows = unmet.length > CENTER_MAX_ROWS ? [unmet[0], "+" + (unmet.length - 1) + " more"] : unmet;
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const h = 34 + Math.max(rows.length, 1) * CENTER_ROW;
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center = { x: cx - CENTER_W / 2, y: cy - h / 2, w: CENTER_W, h: h, unmet: unmet, rows: rows };
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}
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}
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return { width: width, height: height, narrow: narrow, cards: cards, links: links, center: center };
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}
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if (typeof document !== "undefined") {
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const svg = (name, attributes, text) => {
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const element = document.createElementNS(SVG_NS, name);
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Object.keys(attributes || {}).forEach((key) => element.setAttribute(key, attributes[key]));
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if (text !== undefined) element.textContent = text;
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return element;
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};
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const html = (name, text, className) => {
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const element = document.createElement(name);
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if (text !== undefined) element.textContent = text;
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if (className) element.className = className;
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return element;
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};
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const drawChip = (parent, chip, x, y) => {
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const group = svg("g", { class: "chip " + chip.kind, transform: "translate(" + x + "," + y + ")" });
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group.appendChild(svg("rect", { width: chip.w, height: CHIP_HEIGHT, rx: 8.5 }));
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group.appendChild(svg("text", { x: chip.w / 2, y: 12 }, chip.text));
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parent.appendChild(group);
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};
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const drawBar = (group, y, cardW, label, usage) => {
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const trackX = 44;
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const trackW = cardW - trackX - 14 - 118;
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group.appendChild(svg("text", { class: "t-label", x: 14, y: y + 8 }, label));
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group.appendChild(svg("rect", { class: "track", x: trackX, y: y, width: trackW, height: 8, rx: 4 }));
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if (usage) {
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const width = usage.pct ? Math.max((trackW * usage.pct) / 100, 4) : 0;
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if (width) {
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group.appendChild(svg("rect", { class: "fill " + barLevel(usage.pct), x: trackX, y: y, width: width, height: 8, rx: 4 }));
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}
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group.appendChild(svg("text", { class: "t-value", x: cardW - 14, y: y + 8 }, usage.text));
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} else {
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group.appendChild(svg("text", { class: "t-value na", x: cardW - 14, y: y + 8 }, "n/a"));
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}
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};
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const drawCard = (parent, card, payload) => {
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const member = card.member;
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const stats = describeStats(member.stats);
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const classes = ["node", member.alive ? "alive" : "down"];
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if (member.self) classes.push("self");
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const group = svg("g", { class: classes.join(" "), transform: "translate(" + card.x + "," + card.y + ")" });
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group.appendChild(svg("title", {}, member.hostname + " " + card.key + "\nroles: " + (member.roles.join(", ") || "none") +
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(member.declined.length ? "\ndeclined: " + member.declined.join(", ") : "")));
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group.appendChild(svg("rect", { class: "card", width: card.w, height: card.h, rx: 12 }));
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group.appendChild(svg("circle", { class: "dot " + (member.alive ? "alive" : "down"), cx: 20, cy: 22, r: 5 }));
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group.appendChild(svg("text", { class: "t-title", x: 32, y: 26 }, shorten(member.hostname, 22)));
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const tag = member.self ? "this node" : member.alive ? "" : "down " + formatAge(member.seen_ago);
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if (tag) group.appendChild(svg("text", { class: "t-tag", x: card.w - 14, y: 26 }, tag));
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group.appendChild(svg("text", { class: "t-sub", x: 32, y: 43 }, card.key));
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chipLayout(nodeRoles(payload, member), card.w - 28, CHIP_LINES).forEach((chip) => {
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drawChip(group, chip, 14 + chip.x, 54 + chip.line * (CHIP_HEIGHT + 4));
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});
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drawBar(group, 104, card.w, "CPU", stats.cpu);
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drawBar(group, 120, card.w, "RAM", stats.ram);
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drawBar(group, 136, card.w, "DISK", stats.disk);
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group.appendChild(svg("text", { class: "t-foot", x: 14, y: card.h - 8 }, shorten(stats.footer, 56)));
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parent.appendChild(group);
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};
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const drawCenter = (parent, center) => {
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const group = svg("g", { class: "center", transform: "translate(" + center.x + "," + center.y + ")" });
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group.appendChild(svg("rect", { class: "center-box" + (center.unmet.length ? " bad" : ""), width: center.w, height: center.h, rx: 12 }));
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group.appendChild(svg("text", { class: "t-label center-title", x: center.w / 2, y: 20 }, center.unmet.length ? "UNMET ROLES" : "ALL ROLES HELD"));
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center.rows.forEach((name, index) => {
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const chip = { text: shorten(name, 18), kind: name.startsWith("+") ? "more" : "unmet", w: center.w - 28 };
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drawChip(group, chip, 14, 30 + index * CENTER_ROW);
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});
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parent.appendChild(group);
|
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};
|
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const drawGraph = (payload, narrow) => {
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const graph = document.getElementById("graph");
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const geometry = layout(payload, narrow);
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graph.setAttribute("viewBox", "0 0 " + geometry.width + " " + geometry.height);
|
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graph.style.maxWidth = Math.round(geometry.width) + "px";
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graph.replaceChildren();
|
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geometry.links.forEach((link) => {
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graph.appendChild(svg("line", { class: "link " + link.kind, x1: link.x1, y1: link.y1, x2: link.x2, y2: link.y2 }));
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});
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if (geometry.center) drawCenter(graph, geometry.center);
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geometry.cards.forEach((card) => drawCard(graph, card, payload));
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};
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const drawHeader = (payload) => {
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document.getElementById("summary").textContent = summarize(payload);
|
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|
||||
const box = document.getElementById("alerts");
|
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box.replaceChildren();
|
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alerts(payload).forEach((alert) => box.appendChild(html("span", alert.text, "alert " + alert.level)));
|
||||
};
|
||||
|
||||
let latest = null;
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||||
let narrow = window.innerWidth < NARROW_BELOW;
|
||||
|
||||
const render = () => {
|
||||
if (!latest) return;
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||||
drawHeader(latest);
|
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drawGraph(latest, narrow);
|
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document.getElementById("error").hidden = true;
|
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document.getElementById("updated").textContent = "Updated " + new Date().toLocaleTimeString() + " · refreshing every " + REFRESH_MS / 1000 + "s";
|
||||
};
|
||||
|
||||
window.addEventListener("resize", () => {
|
||||
const now = window.innerWidth < NARROW_BELOW;
|
||||
if (now !== narrow) {
|
||||
narrow = now;
|
||||
render();
|
||||
}
|
||||
});
|
||||
|
||||
let busy = false;
|
||||
const refresh = async () => {
|
||||
if (busy) return;
|
||||
busy = true;
|
||||
try {
|
||||
const response = await fetch("/api/status", { cache: "no-store" });
|
||||
if (!response.ok) throw new Error("the node answered with HTTP " + response.status);
|
||||
latest = await response.json();
|
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render();
|
||||
} catch (error) {
|
||||
const banner = document.getElementById("error");
|
||||
banner.textContent = "Cannot reach the node: " + error.message + ". Retrying...";
|
||||
banner.hidden = false;
|
||||
} finally {
|
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busy = false;
|
||||
}
|
||||
};
|
||||
|
||||
refresh();
|
||||
setInterval(refresh, REFRESH_MS);
|
||||
}
|
||||
|
||||
if (typeof module !== "undefined") {
|
||||
module.exports = { address, roleStates, layout, nodeRoles, chipLayout, chipWidth, shorten, formatAge, formatSize, formatUptime, describeStats, barLevel, alerts, summarize };
|
||||
}
|
||||
Reference in new issue
Block a user