Admin: freier Speicher pro Docker-Host anzeigen

Die Karte Docker-Hosts zeigt den freien Speicher unter /var/lib/docker, per SSH
mit df gemessen und eine Minute zwischengespeichert. Unter 20 GB wird die
Zeile rot.

client/src/pages/AdminPage.jsx

@@ -408,6 +408,11 @@ function HostUsage({ hosts }) {
               <div className="host-bar" role="progressbar" aria-valuenow={percent} aria-valuemin={0} aria-valuemax={100}>
                 <span style={{ width: `${percent}%` }} />
               </div>
+              {h.disk && (
+                <div className={`host-disk ${h.disk.freeBytes < 20e9 ? 'is-low' : ''}`}>
+                  Speicher: {gb(h.disk.freeBytes)} frei von {gb(h.disk.totalBytes)}
+                </div>
+              )}
               {h.matches.length === 0 ? (
                 <p className="muted small">Keine Gameserver</p>
               ) : (
@@ -422,3 +427,6 @@ function HostUsage({ hosts }) {
     </section>
   );
 }
+function gb(bytes) {
+  return `${Math.round(bytes / 1e9)} GB`;
+}

client/src/styles.css

@@ -566,3 +566,5 @@ input:focus, select:focus { border-color: var(--link); outline: none; }
 .host-card.is-full .host-bar span { background: var(--pending); }
 .host-matches { list-style: none; margin: 0; padding: 0; font-size: .9rem; }
 .host-matches li { padding: 3px 0; border-top: 1px solid var(--line); }
+.host-disk { font-size: .85rem; color: var(--muted); margin: -2px 0 8px; font-variant-numeric: tabular-nums; }
+.host-disk.is-low { color: var(--error); font-weight: 600; }

server/src/adminRoutes.js

@@ -89,9 +89,9 @@ export function createAdminRouter({ service, manager, config }) {
   }));
 
   // Alle Matches mit allen Details (Codes, Verbindungsdaten, Spieler, Veto, Serie, Ereignisse)
-  router.get('/matches', requireAdmin, wrap(() => {
+  router.get('/matches', requireAdmin, wrap(async () => {
     const ids = service.db.prepare('SELECT id FROM matches ORDER BY created_at DESC LIMIT 100').all();
-    return { matches: ids.map(({ id }) => service.snapshot(id, adminViewer(id))), hosts: manager.hostUsage() };
+    return { matches: ids.map(({ id }) => service.snapshot(id, adminViewer(id))), hosts: await manager.hostUsage() };
   }));
 
   const action = (path, fn) => router.post(`/matches/:id/${path}`, requireAdmin, wrap((req) => {

server/src/servers/dockerAdapter.js

@@ -4,6 +4,16 @@ import { configureViaRcon, listRoundBackups, loadRoundBackup, rconStatus } from
 import { runRcon } from './rcon.js';
 
 const exec = promisify(execFile);
+const DISK_CACHE_MS = 60_000;
+
+/** Liest Gesamt- und freien Speicher aus einer Zeile von `df -B1` (Spalten: Filesystem, 1B-blocks, Used, Available …). */
+export function parseDf(output) {
+  const parts = String(output).trim().split(/\s+/);
+  const totalBytes = Number(parts[1]);
+  const freeBytes = Number(parts[3]);
+  if (!Number.isFinite(totalBytes) || !Number.isFinite(freeBytes)) return null;
+  return { totalBytes, freeBytes };
+}
 const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
 
 // Diese Zeile schreibt das Image, sobald SteamCMD fertig ist und der Spielserver startet.
@@ -236,6 +246,37 @@ export class DockerHostPool {
       getUsedPorts: () => (getUsedPorts ? getUsedPorts(h.publicHost) : new Set()),
       runDocker,
     })]));
+    this.diskCache = new Map();
+    this.diskInflight = new Map();
+  }
+
+  /**
+   * Freier Speicher unter /var/lib/docker auf einem Host, per SSH. Ergebnis wird eine Minute lang
+   * zwischengespeichert, weil die Admin-Seite alle paar Sekunden abfragt. Ohne ssh:// gibt es null.
+   */
+  async diskUsage(name) {
+    const host = this.hosts.find((h) => h.name === name);
+    if (!host?.dockerHost?.startsWith('ssh://')) return null;
+    const cached = this.diskCache.get(name);
+    if (cached && Date.now() - cached.at < DISK_CACHE_MS) return cached.value;
+    if (!this.diskInflight.has(name)) {
+      this.diskInflight.set(name, (async () => {
+        let value = null;
+        try {
+          const { stdout } = await exec('ssh', [
+            '-o', 'BatchMode=yes', '-o', 'ConnectTimeout=5', host.dockerHost.slice('ssh://'.length),
+            'df -B1 /var/lib/docker 2>/dev/null || df -B1 /',
+          ], { timeout: 10_000 });
+          value = parseDf(stdout.trim().split('\n').pop());
+        } catch {
+          value = null;
+        }
+        this.diskCache.set(name, { at: Date.now(), value });
+        this.diskInflight.delete(name);
+        return value;
+      })());
+    }
+    return this.diskInflight.get(name);
   }
 
   /** Freie Port-Paare auf einem Host. */

server/src/servers/serverManager.js

@@ -161,15 +161,18 @@ export class ServerManager {
   }
 
   /** Auslastung der Docker-Hosts mit den Matches, die dort laufen. Leer, wenn der Adapter keine Hosts kennt. */
-  hostUsage() {
+  async hostUsage() {
     if (!this.adapter.hostStats) return [];
     const rows = this.db.prepare(`
       SELECT s.host, s.status, m.id AS match_id, m.team_a_name, m.team_b_name
       FROM servers s JOIN matches m ON m.id = s.match_id
       WHERE s.status != 'stopped' AND s.host IS NOT NULL
     `).all();
-    return this.adapter.hostStats().map((h) => ({
+    const stats = this.adapter.hostStats();
+    const disks = await Promise.all(stats.map((h) => this.adapter.diskUsage?.(h.name) ?? null));
+    return stats.map((h, i) => ({
       ...h,
+      disk: disks[i],
       matches: rows
         .filter((r) => r.host === h.publicHost)
         .map((r) => ({ id: r.match_id, title: `${r.team_a_name} vs. ${r.team_b_name}`, status: r.status })),

server/test/dockerHostPool.test.js

@@ -88,3 +88,11 @@ test('Auslastung pro Host: Port-Paare insgesamt und belegt', () => {
     { name: 'b', publicHost: '10.0.0.2', total: 20, used: 0 },
   ]);
 });
+test('df-Ausgabe wird in Gesamt- und freien Speicher zerlegt', async () => {
+  const { parseDf } = await import('../src/servers/dockerAdapter.js');
+  assert.deepEqual(parseDf('/dev/sda1 1000000000000 400000000000 600000000000 40% /var/lib/docker'), {
+    totalBytes: 1000000000000,
+    freeBytes: 600000000000,
+  });
+  assert.equal(parseDf('kaputt'), null);
+});