Initial commit: Cockpit GPU monitor plugin for NVIDIA

Native, self-contained Cockpit page (plain HTML/JS, no build step) that polls nvidia-smi via cockpit.spawn to show live GPU utilization, memory, temperature, power, fan speed, ~5min history sparklines, and the list of processes using the GPU. No background systemd service; data collection only happens while the page is open.
2026-07-15 10:40:20 -03:00
commit 42720a70bc
7 changed files with 626 additions and 0 deletions
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+/* gpu-monitor: estilos autocontenidos, sin dependencia de PatternFly ni de
+ * assets internos de Cockpit (para no acoplarse a rutas que cambian entre
+ * versiones). */
+
+:root {
+    --gpu-bg: #ffffff;
+    --gpu-fg: #1a1a1a;
+    --gpu-muted: #6a6a6a;
+    --gpu-card-bg: #f5f5f5;
+    --gpu-border: #dcdcdc;
+    --gpu-accent: #0066cc;
+    --gpu-error-bg: #fdecea;
+    --gpu-error-fg: #7a1f1a;
+    --gpu-error-border: #f2b8b5;
+}
+
+@media (prefers-color-scheme: dark) {
+    :root {
+        --gpu-bg: #1e1e1e;
+        --gpu-fg: #e8e8e8;
+        --gpu-muted: #a0a0a0;
+        --gpu-card-bg: #2a2a2a;
+        --gpu-border: #3d3d3d;
+        --gpu-accent: #4da3ff;
+        --gpu-error-bg: #3a1f1e;
+        --gpu-error-fg: #f5b8b3;
+        --gpu-error-border: #5c2b28;
+    }
+}
+
+* {
+    box-sizing: border-box;
+}
+
+body {
+    margin: 0;
+    padding: 16px;
+    font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+    background: var(--gpu-bg);
+    color: var(--gpu-fg);
+}
+
+h2 {
+    font-size: 1rem;
+    font-weight: 600;
+    margin: 0 0 8px;
+}
+
+.error-banner {
+    background: var(--gpu-error-bg);
+    color: var(--gpu-error-fg);
+    border: 1px solid var(--gpu-error-border);
+    border-radius: 4px;
+    padding: 10px 14px;
+    margin-bottom: 16px;
+    font-size: 0.9rem;
+}
+
+.gpu-container {
+    display: flex;
+    flex-direction: column;
+    gap: 16px;
+    margin-bottom: 24px;
+}
+
+.gpu-card {
+    background: var(--gpu-card-bg);
+    border: 1px solid var(--gpu-border);
+    border-radius: 6px;
+    padding: 16px;
+}
+
+.gpu-title {
+    color: var(--gpu-accent);
+}
+
+.tiles {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
+    gap: 12px;
+    margin-bottom: 16px;
+}
+
+.tile {
+    background: var(--gpu-bg);
+    border: 1px solid var(--gpu-border);
+    border-radius: 4px;
+    padding: 8px 12px;
+}
+
+.tile-label {
+    font-size: 0.75rem;
+    color: var(--gpu-muted);
+    text-transform: uppercase;
+    letter-spacing: 0.03em;
+}
+
+.tile-value {
+    font-size: 1.3rem;
+    font-weight: 600;
+    margin-top: 2px;
+}
+
+.charts {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
+    gap: 16px;
+}
+
+.chart-box {
+    background: var(--gpu-bg);
+    border: 1px solid var(--gpu-border);
+    border-radius: 4px;
+    padding: 8px 12px;
+}
+
+.chart-title {
+    font-size: 0.75rem;
+    color: var(--gpu-muted);
+    margin-bottom: 4px;
+}
+
+.sparkline {
+    width: 100%;
+    height: 60px;
+    display: block;
+}
+
+.sparkline polyline {
+    fill: none;
+    stroke: var(--gpu-accent);
+    stroke-width: 2;
+    vector-effect: non-scaling-stroke;
+}
+
+.process-section {
+    margin-top: 8px;
+}
+
+.process-table {
+    width: 100%;
+    border-collapse: collapse;
+    font-size: 0.9rem;
+}
+
+.process-table th,
+.process-table td {
+    text-align: left;
+    padding: 6px 10px;
+    border-bottom: 1px solid var(--gpu-border);
+}
+
+.process-table th {
+    color: var(--gpu-muted);
+    font-weight: 600;
+    font-size: 0.75rem;
+    text-transform: uppercase;
+    letter-spacing: 0.03em;
+}
+
+.empty-row td {
+    color: var(--gpu-muted);
+    font-style: italic;
+}