9f7ad8f177
Adds /api/system/stream — a Server-Sent Events feed driven by a single per-process ticker that reads /proc directly and splices in the latest host-side metrics.json each second. Subscribers share the connection so N open tabs cost one ticker, and the ticker pauses entirely when nobody is listening. Frontend gets a singleton LiveSystem EventSource manager with auto- reconnect, Page-Visibility integration (closes on tab hide), and last- sample replay for late subscribers. Admin -> System gauges and the dashboard memory + disk tile now tick at 1 Hz; trend charts and the per-app table keep their 30 s poll because the underlying files only regenerate once a minute. Also adds /api/system/history as a thin range-query wrapper over the existing 24 h JSON ring buffer — the binary ring backend will slot in behind it in the next phase without changing the response shape. Signed-off-by: librelad <librelad@digitalangels.vip>
246 lines
12 KiB
JavaScript
246 lines
12 KiB
JavaScript
// Admin → System — in-depth host + per-app statistics. Live ring gauges for the
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// headline numbers, SVG trend charts driven by the metrics history ring buffer,
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// a Docker summary, and a per-app resource table.
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//
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// Two data paths:
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// - Live (1 Hz, via LiveSystem SSE): CPU%, memory, load, disks, network,
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// docker totals. Updates the gauges in place each second so they tick like
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// a real instrument.
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// - Periodic (every 30 s, via fetch): the history ring buffer + per-app
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// table. These regenerate at most once a minute on the host, so polling
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// them faster would be wasted bandwidth.
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// Renders into #config-section.
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class AdminSystem {
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constructor(rootId = 'config-section') {
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this.rootId = rootId;
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this.range = 60; // minutes of history to chart
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this._timer = null;
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this._unsubLive = null;
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this.d = {};
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}
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root() { return document.getElementById(this.rootId); }
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async init() {
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const r = this.root();
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if (r) r.innerHTML = '<div class="admin-page"><div class="backup-empty-state">Loading system stats…</div></div>';
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await this.refresh();
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this.bind();
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this._stopLive();
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// 1 Hz live gauges via the shared EventSource manager.
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if (window.LiveSystem) {
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this._unsubLive = window.LiveSystem.subscribe((s) => this._applyLive(s));
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}
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// History/per-app refresh stays slower — those files only regenerate
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// once a minute on the host. Stop both paths once the user navigates off.
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if (this._timer) clearInterval(this._timer);
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this._timer = setInterval(() => {
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if (!document.querySelector('.sys-page')) {
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clearInterval(this._timer); this._timer = null;
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this._stopLive();
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return;
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}
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this.refresh();
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}, 30000);
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}
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_stopLive() {
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if (this._unsubLive) { try { this._unsubLive(); } catch (_) {} this._unsubLive = null; }
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}
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async refresh() {
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const [metrics, history, apps, appsHist, info] = await Promise.all([
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this.fetchJson('/data/system/metrics.json'),
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this.fetchJson('/data/system/metrics_history.json'),
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this.fetchJson('/data/system/metrics_apps.json'),
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this.fetchJson('/data/system/metrics_apps_history.json'),
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this.fetchJson('/data/system/system_info.json')
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]);
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this.d = { metrics, history, apps, appsHist, info };
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this.render();
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}
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async fetchJson(url) {
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try { const r = await fetch(`${url}?t=${Date.now()}`); if (!r.ok) return null; return await r.json(); }
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catch { return null; }
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}
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bind() {
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if (this._bound) return;
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this._bound = true;
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document.addEventListener('click', (e) => {
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const rb = e.target.closest('[data-sys-range]');
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if (rb && document.querySelector('.sys-page')) {
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this.range = parseInt(rb.dataset.sysRange) || 60;
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this.render();
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}
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});
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}
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/* ---- formatting helpers ---- */
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escape(s) { return String(s ?? '').replace(/[&<>"']/g, c => ({ '&': '&', '<': '<', '>': '>', '"': '"', "'": ''' }[c])); }
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bytes(n) {
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n = Number(n) || 0;
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const u = ['B', 'KB', 'MB', 'GB', 'TB']; let i = 0;
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while (n >= 1024 && i < u.length - 1) { n /= 1024; i++; }
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return `${n.toFixed(i ? 1 : 0)} ${u[i]}`;
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}
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rate(n) { return `${this.bytes(n)}/s`; }
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// Last N minutes of a given key from the history ring buffer.
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series(key) {
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const pts = (this.d.history && Array.isArray(this.d.history.points)) ? this.d.history.points : [];
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return pts.slice(-this.range).map(p => Number(p[key]) || 0);
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}
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rangeBtns() {
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const opts = [[60, '1h'], [360, '6h'], [1440, '24h']];
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return `<div class="sys-range">${opts.map(([m, l]) =>
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`<button type="button" class="sys-range-btn ${this.range === m ? 'active' : ''}" data-sys-range="${m}">${l}</button>`
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).join('')}</div>`;
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}
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chartCard(title, bodyHtml, meta) {
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return `<div class="sys-chart-card">
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<div class="sys-chart-head"><span>${title}</span>${meta ? `<span class="sys-chart-meta">${meta}</span>` : ''}</div>
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<div class="sys-chart-body">${bodyHtml}</div>
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</div>`;
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}
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// Shared by full render() and the 1 Hz live path so both produce identical
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// gauge markup; only `this.d.metrics` differs in source.
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_gaugesHtml() {
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const C = window.LPCharts;
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const m = this.d.metrics || {};
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const cpu = m.cpu || {}, mem = m.memory || {};
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const disks = Array.isArray(m.disks) ? m.disks : [];
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const rootDisk = disks.find(d => d.mount === '/') || disks[0] || {};
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return `
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${C.gauge(cpu.percent || 0, { label: 'CPU', sublabel: `${cpu.cores || '?'} cores` })}
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${C.gauge(mem.percent || 0, { label: 'Memory', sublabel: `${this.bytes(mem.used)} / ${this.bytes(mem.total)}` })}
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${C.gauge(rootDisk.percent || 0, { label: 'Disk', sublabel: rootDisk.mount || '/' })}
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${C.gauge(cpu.load1_percent || 0, { label: 'Load', display: (cpu.load1 ?? 0), suffix: '', sublabel: `1m · ${cpu.load5 ?? '–'}/${cpu.load15 ?? '–'}` })}`;
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}
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// Fold a live SSE sample into this.d.metrics and refresh the in-page
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// gauges + "updated" stamp without rebuilding the heavier sections.
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// The payload shape matches the host generator's metrics.json so we can
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// assign straight in; absent fields keep their previous value.
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_applyLive(s) {
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if (!s || !document.querySelector('.sys-page')) return;
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const m = this.d.metrics || {};
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this.d.metrics = {
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...m,
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cpu: s.cpu || m.cpu,
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memory: s.memory || m.memory,
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disks: Array.isArray(s.disks) && s.disks.length ? s.disks : m.disks,
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network: s.network || m.network,
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docker: s.docker || m.docker,
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updated: new Date(s.t || Date.now()).toISOString()
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};
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const gaugesEl = document.querySelector('.sys-page .sys-gauges');
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if (gaugesEl) gaugesEl.innerHTML = this._gaugesHtml();
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const subEl = document.querySelector('.sys-page .page-header-title p');
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if (subEl) subEl.textContent = `Live host and per-app statistics. Updated ${new Date(s.t || Date.now()).toLocaleTimeString()}.`;
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}
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render() {
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const root = this.root();
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if (!root) return;
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const C = window.LPCharts;
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const m = this.d.metrics || {};
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const cpu = m.cpu || {}, mem = m.memory || {}, net = m.network || {}, dk = m.docker || {};
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const info = this.d.info || {};
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const disks = Array.isArray(m.disks) ? m.disks : [];
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const rootDisk = disks.find(d => d.mount === '/') || disks[0] || {};
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const gauges = `<div class="sys-gauges">${this._gaugesHtml()}</div>`;
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// Trend charts
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const rx = this.series('net_rx'), tx = this.series('net_tx');
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const lastRx = rx[rx.length - 1] || 0, lastTx = tx[tx.length - 1] || 0;
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const charts = `
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<div class="sys-section-head">
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<h2>Trends</h2>
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${this.rangeBtns()}
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</div>
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<div class="sys-charts">
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${this.chartCard('CPU usage', C.areaChart(this.series('cpu'), { color: 'accent', max: 100, fmt: v => `${Math.round(v)}%` }), 'last %')}
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${this.chartCard('Memory usage', C.areaChart(this.series('mem'), { color: 'status-info', max: 100, fmt: v => `${Math.round(v)}%` }), 'last %')}
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${this.chartCard('Disk usage', C.areaChart(this.series('disk'), { color: 'status-warning', max: 100, fmt: v => `${Math.round(v)}%` }), rootDisk.mount || '/')}
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${this.chartCard('Network',
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C.multiLine([{ values: rx, color: 'status-success' }, { values: tx, color: 'accent' }]) +
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`<div class="sys-net-legend"><span><i class="dot ok"></i>↓ ${this.rate(lastRx)}</span><span><i class="dot accent"></i>↑ ${this.rate(lastTx)}</span></div>`,
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'rx / tx')}
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</div>`;
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// Host info + swap + docker summary
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const infoStrip = `
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<div class="sys-strip">
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${this.stat('OS', info.os || '—')}
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${this.stat('Kernel', info.kernel || '—')}
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${this.stat('Uptime', (info.uptime || '—').replace(/^up /, ''))}
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${this.stat('CPU', info.cpu || '—')}
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${this.stat('Swap', mem.swap_total ? `${this.bytes(mem.swap_used)} / ${this.bytes(mem.swap_total)}` : 'none')}
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</div>`;
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const dockerStrip = `
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<div class="sys-section-head"><h2>Docker</h2></div>
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<div class="sys-strip">
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${this.stat('Containers running', `${dk.containers_running ?? 0} / ${dk.containers_total ?? 0}`)}
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${this.stat('Images', String(dk.images ?? 0))}
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${this.stat('Volumes', String(dk.volumes ?? 0))}
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${this.stat('Mounts', String(disks.length))}
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</div>`;
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// Per-app table
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const apps = (this.d.apps && Array.isArray(this.d.apps.apps)) ? this.d.apps.apps : [];
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const appsHist = (this.d.appsHist && this.d.appsHist.apps) ? this.d.appsHist.apps : {};
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const appsBody = apps.length ? apps.map(a => {
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const spark = (appsHist[a.app] || []).map(p => Number(p.cpu) || 0);
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const statusCls = a.status === 'running' ? 'ok' : 'none';
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return `<tr>
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<td class="sys-app-name"><span class="admin-status-dot ${statusCls}"></span>${this.escape(a.app)}
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<span class="sys-app-sub">${a.running}/${a.containers} up</span></td>
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<td>${C.bar(a.cpu_percent)}<span class="sys-cell-val">${(a.cpu_percent || 0).toFixed(1)}%</span></td>
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<td>${C.bar(a.mem_percent)}<span class="sys-cell-val">${this.bytes(a.mem_bytes)}</span></td>
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<td class="sys-net-cell">↓${this.bytes(a.net_rx)} ↑${this.bytes(a.net_tx)}</td>
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<td class="sys-spark-cell">${C.sparkline(spark, { color: 'accent' })}</td>
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</tr>`;
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}).join('') : `<tr><td colspan="5" class="sys-apps-empty">No running containers — install an app to see per-app stats.</td></tr>`;
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const appsTable = `
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<div class="sys-section-head"><h2>Per-app usage</h2><span class="sys-chart-meta">sorted by CPU</span></div>
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<div class="sys-apps-wrap">
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<table class="sys-apps">
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<thead><tr><th>App</th><th>CPU</th><th>Memory</th><th>Network</th><th>CPU trend</th></tr></thead>
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<tbody>${appsBody}</tbody>
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</table>
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</div>`;
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const updated = m.updated ? new Date(m.updated).toLocaleTimeString() : '—';
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root.innerHTML = `
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<div class="admin-page sys-page">
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<div class="page-header config-page-header">
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<div class="page-header-title">
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<div class="admin-breadcrumb">Admin</div>
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<h1>System</h1>
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<p>Live host and per-app statistics. Updated ${updated}.</p>
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</div>
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</div>
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${gauges}
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${charts}
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${infoStrip}
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${dockerStrip}
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${appsTable}
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</div>`;
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}
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stat(label, value) {
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return `<div class="sys-stat"><span class="sys-stat-label">${this.escape(label)}</span><strong class="sys-stat-value">${this.escape(value)}</strong></div>`;
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}
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}
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window.AdminSystem = AdminSystem;
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