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.

.env.example

@@ -52,6 +52,9 @@ CS2_PORT_RANGE_END=27115
 # Gemeinsames Volume für die Spieldateien (~60 GB), damit nicht jedes Match neu herunterlädt
 CS2_DOCKER_VOLUME=cs2-mapveto-gamefiles
 CS2_DOCKER_EXTRA_ARGS=
+# Optional: mehrere Docker-Hosts als JSON-Liste (eine Zeile). Leer = nur CS2_PUBLIC_HOST/DOCKER_HOST.
+# Einrichtung pro Host: bash deploy/docker-host-einrichten.sh <ssh-ziel>
+# CS2_DOCKER_HOSTS=[{"name":"host1","dockerHost":"ssh://cs2@192.168.178.111","publicHost":"192.168.178.111","portStart":27100,"portEnd":27139}]
 CS2_START_TIMEOUT_MINUTES=20
 DOCKER_BIN=docker
 

README.md

@@ -236,6 +236,24 @@ Voraussetzungen:
 
 Container heißen `cs2mv-<matchId>` und tragen das Label `cs2-mapveto=1`. Stoppen bedeutet `docker rm -f`.
 
+### Mehrere Docker-Hosts
+
+Mit `CS2_DOCKER_HOSTS` verteilt die Anwendung Matches auf mehrere Docker-Hosts. Jedes neue Match läuft auf dem Host mit den meisten freien Ports. Der Host bleibt im Match gespeichert, Status, Konfiguration und Stopp gehen immer an denselben Host.
+
+1. Jeden Host einrichten (SSH-Schlüssel, Docker, Volume, Image):
+
+   ```bash
+   bash deploy/docker-host-einrichten.sh cs2@192.168.178.111
+   ```
+
+2. Die Hosts in der `.env` eintragen, als JSON-Liste in einer Zeile:
+
+   ```
+   CS2_DOCKER_HOSTS=[{"name":"host1","dockerHost":"ssh://cs2@192.168.178.111","publicHost":"192.168.178.111","portStart":27100,"portEnd":27139},{"name":"host2","dockerHost":"ssh://cs2@192.168.178.112","publicHost":"192.168.178.112","portStart":27100,"portEnd":27139}]
+   ```
+
+Jeder Host braucht eigene Spieldateien (rund 60 bis 90 GB). Die Ports müssen auf jedem Host frei sein.
+
 ### Option B: Vorhandene Server (`SERVER_ADAPTER=static`)
 
 Für selbst betriebene, dauerhaft laufende CS2-Server:

client/src/pages/AdminPage.jsx

@@ -26,6 +26,7 @@ const storeToken = (t) => {
 export default function AdminPage() {
   const [token, setToken] = useState(getToken);
   const [matches, setMatches] = useState(null);
+  const [hosts, setHosts] = useState([]);
   const [error, setError] = useState(null);
   const [notice, setNotice] = useState(null);
   const [busy, setBusy] = useState(null);
@@ -42,6 +43,7 @@ export default function AdminPage() {
     try {
       const res = await api('/admin/matches', { token });
       setMatches(res.matches);
+      setHosts(res.hosts ?? []);
       setError(null);
     } catch (err) {
       if (err.status === 401) {
@@ -101,6 +103,7 @@ export default function AdminPage() {
       {tab === 'settings' && token && <NotificationSettings token={token} setNotice={setNotice} />}
       {notice && <div className={`toast toast-${notice.tone}`} role="status">{notice.text}</div>}
       {error && <div className="alert alert-error">{error}</div>}
+      {tab === 'matches' && <HostUsage hosts={hosts} />}
       {tab === 'matches' && matches === null && !error && <p className="muted">Lade Matches …</p>}
       {tab === 'matches' && matches && matches.length === 0 && <p className="muted">Noch keine Matches.</p>}
 
@@ -386,3 +389,44 @@ function MatchAdminCard({ m, run, busy, token, reload, setNotice }) {
     </section>
   );
 }
+/** Auslastung der Docker-Hosts: wie viele Gameserver läuft auf welchem Host, mit Liste der Matches. */
+function HostUsage({ hosts }) {
+  if (hosts.length === 0) return null;
+  return (
+    <section className="host-usage">
+      <h2>Docker-Hosts</h2>
+      <div className="host-grid">
+        {hosts.map((h) => {
+          const percent = h.total ? Math.round((h.used / h.total) * 100) : 0;
+          return (
+            <div key={h.name} className={`host-card ${percent >= 90 ? 'is-full' : ''}`}>
+              <div className="host-head">
+                <strong>{h.name}</strong>
+                <span className="muted small">{h.publicHost}</span>
+                <span className="host-count">{h.used} / {h.total} belegt</span>
+              </div>
+              <div className="host-bar" role="progressbar" aria-valuenow={percent} aria-valuemin={0} aria-valuemax={100}>
+                <span style={{ width: `${percent}%` }} />
+              </div>
+              {h.disk && (
+                <div className={`host-disk ${h.disk.freeBytes < 20e9 ? 'is-low' : ''}`}>
+                  Speicher: {gb(h.disk.freeBytes)} frei von {gb(h.disk.totalBytes)}
+                </div>
+              )}
+              {h.matches.length === 0 ? (
+                <p className="muted small">Keine Gameserver</p>
+              ) : (
+                <ul className="host-matches">
+                  {h.matches.map((m) => <li key={m.id}>{m.title} <span className="muted small">{m.status}</span></li>)}
+                </ul>
+              )}
+            </div>
+          );
+        })}
+      </div>
+    </section>
+  );
+}
+function gb(bytes) {
+  return `${Math.round(bytes / 1e9)} GB`;
+}

client/src/pages/MatchPage.jsx

@@ -127,7 +127,7 @@ export default function MatchPage() {
 
       {viewer.role === 'public' && <PublicNotice />}
 
-      <div className={`match-grid ${state.status !== 'lobby' && viewer.role !== 'public' ? 'stage-wide' : ''}`}>
+      <div className={`match-grid ${state.status !== 'lobby' ? 'stage-wide' : ''}`}>
         <TeamCard team={state.teams.A} side="A" {...ctx} />
         <section className="stage">
           <Stage {...ctx} />
@@ -156,8 +156,8 @@ function describeViewer(viewer, teams) {
 
 function Stage(ctx) {
   const { state, isOrg, act, busy } = ctx;
-  if (state.viewer.role === 'public') {
-    return <div className="stage-note"><h2>{state.statusLabel}</h2><p className="muted">Details sehen nur Teilnehmer.</p></div>;
+  if (state.viewer.role === 'public' && state.status === 'lobby') {
+    return <div className="stage-note"><h2>{state.statusLabel}</h2><p className="muted">Das Veto und der Spielstand erscheinen hier, sobald das Match startet.</p></div>;
   }
   if (state.status === 'lobby') {
     const { A, B } = state.teams;
@@ -230,8 +230,8 @@ function MapPoolPreview({ maps }) {
 function PublicNotice() {
   return (
     <div className="alert">
-      Du siehst diese Lobby ohne Zugang. Spieler treten über den Einladungslink ihres Teams bei,
-      Zuschauer über den Zuschauerlink. Beides bekommst du vom Organisator.
+      Du siehst dieses Match ohne Zugang. Veto, Serienstand und Ergebnisse sind öffentlich.
+      Teamdetails und Verbindungsdaten gibt es nur für Teilnehmer.
     </div>
   );
 }

client/src/pages/Overview.jsx

@@ -4,6 +4,7 @@ import { api } from '../lib/api.js';
 import { FORMAT_LABEL, serverLabel, timeAgo } from '../lib/labels.js';
 import { getAccess } from '../lib/session.js';
 import { useOverview } from '../lib/useMatch.js';
+import MapImage from '../components/MapImage.jsx';
 
 const GROUPS = [
   { key: 'open', title: 'Offen', empty: 'Keine offenen Lobbys. Erstelle ein Match, um zu starten.' },
@@ -32,7 +33,11 @@ export default function Overview() {
             return (
               <section key={g.key} className={`group group-${g.key}`}>
                 <h2>{g.title} <span className="count">{list.length}</span></h2>
-                {list.length === 0 ? <p className="muted small">{g.empty}</p> : (
+                {list.length === 0 ? <p className="muted small">{g.empty}</p> : g.key === 'running' ? (
+                  <div className="run-grid">
+                    {list.map((m) => <RunningCard key={m.id} match={m} />)}
+                  </div>
+                ) : (
                   <ul className="match-list">
                     {list.map((m) => <MatchRow key={m.id} match={m} />)}
                   </ul>
@@ -79,6 +84,34 @@ function MatchRow({ match: m }) {
   );
 }
 
+/** Karte für ein laufendes Match: Map als Hintergrund, Stand groß, Serie und Status darunter. */
+function RunningCard({ match: m }) {
+  const server = serverLabel(m.server);
+  const map = m.currentMap;
+  const live = map && !map.finished;
+  const bo1 = m.format === 'bo1';
+  return (
+    <Link to={`/m/${m.id}`} className={`run-card ${live ? 'is-live' : ''}`} style={{ '--map': map?.color ?? '#3a4150' }}>
+      {map?.image && <MapImage map={{ image: map.image, color: map.color, name: map.name }} className="run-art" />}
+      <div className="run-top">
+        <span className="run-mode">{m.modeLabel}, {FORMAT_LABEL[m.format]}</span>
+        {live ? <span className="live-badge run-live">Live</span> : <span className={`run-status tone-${server.tone}`}>{m.statusLabel}</span>}
+      </div>
+      <div className="run-teams">
+        <span className="run-team a">{m.teamA}</span>
+        <span className="run-score">
+          {map ? <>{map.score.A}<i>:</i>{map.score.B}</> : <i className="run-vs">vs.</i>}
+        </span>
+        <span className="run-team b">{m.teamB}</span>
+      </div>
+      <div className="run-foot">
+        <span>{map ? `Map ${map.number}: ${map.name}` : 'Veto läuft'}</span>
+        {!bo1 && m.seriesScore && <span className="run-series">Serie {m.seriesScore.A}:{m.seriesScore.B}</span>}
+      </div>
+    </Link>
+  );
+}
+
 function CodeEntry() {
   const [code, setCode] = useState('');
   const [error, setError] = useState(null);

client/src/styles.css

@@ -534,3 +534,37 @@ input:focus, select:focus { border-color: var(--link); outline: none; }
 .admin-badge { display: inline-block; margin-top: 6px; padding: 2px 10px; border-radius: 999px; font-size: .8rem; font-weight: 600; }
 .admin-badge.is-paused { background: color-mix(in srgb, var(--pending) 22%, transparent); color: var(--pending); border: 1px solid var(--pending); }
 .btn-warn { border-color: var(--pending); color: var(--pending); }
+/* Laufende Matches in der Übersicht */
+.run-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
+.run-card { position: relative; display: flex; flex-direction: column; justify-content: space-between; gap: 10px; min-height: 190px; padding: 16px 18px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--surface); color: var(--text); text-decoration: none; overflow: hidden; isolation: isolate; transition: transform .15s ease, border-color .15s ease; }
+.run-card:hover { transform: translateY(-2px); border-color: var(--map); }
+.run-card.is-live { box-shadow: inset 3px 0 0 var(--brand-red); }
+.run-art { position: absolute; inset: 0; z-index: -1; opacity: .28; }
+.run-art::after { background: linear-gradient(180deg, rgba(0,0,0,.2), rgba(0,0,0,.92)); }
+.run-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; font-size: .8rem; color: var(--muted); }
+.run-live { animation: run-pulse 1.6s ease-in-out infinite; }
+@keyframes run-pulse { 50% { opacity: .55; } }
+.run-status { font-weight: 600; }
+.run-teams { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 8px; text-align: center; }
+.run-team { font: 700 1.25rem var(--display); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.run-team.a { color: var(--team-a); text-align: right; }
+.run-team.b { color: var(--team-b); text-align: left; }
+.run-score { font: 700 2.25rem var(--display); font-variant-numeric: tabular-nums; }
+.run-score i { font-style: normal; color: var(--muted); padding: 0 4px; }
+.run-vs { font-size: 1rem; color: var(--muted); font-style: normal; }
+.run-foot { display: flex; justify-content: space-between; gap: 8px; font-size: .875rem; color: var(--muted); }
+.run-series { font-variant-numeric: tabular-nums; }
+.host-usage { margin-bottom: 20px; }
+.host-usage h2 { font-size: 1.1rem; margin: 0 0 10px; }
+.host-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
+.host-card { border: 1px solid var(--line); background: var(--surface); border-radius: var(--radius); padding: 12px 14px; }
+.host-card.is-full { border-color: var(--pending); }
+.host-head { display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: baseline; margin-bottom: 8px; }
+.host-count { margin-left: auto; font-variant-numeric: tabular-nums; font-size: .875rem; }
+.host-bar { height: 6px; border-radius: 3px; background: var(--line); overflow: hidden; margin-bottom: 8px; }
+.host-bar span { display: block; height: 100%; background: var(--primary); transition: width .3s ease; }
+.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; }

deploy/docker-host-einrichten.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+# Richtet einen Docker-Host für CS2 Mapveto ein. Läuft vom eigenen Rechner aus per SSH.
+#
+# Aufruf:  bash deploy/docker-host-einrichten.sh <ssh-ziel> [volume]
+# Beispiel: bash deploy/docker-host-einrichten.sh cs2@192.168.178.111
+#
+# Voraussetzungen: SSH-Schlüssel hinterlegt (ohne Passwortabfrage), Docker auf dem Host installiert.
+set -euo pipefail
+
+TARGET="${1:?Aufruf: $0 <ssh-ziel> [volume]}"
+VOLUME="${2:-cs2-mapveto-gamefiles}"
+IMAGE="joedwards32/cs2:latest"
+HOST_PART="${TARGET#*@}"
+
+echo "→ Verbindung zu $TARGET prüfen"
+ssh -o BatchMode=yes -o ConnectTimeout=10 "$TARGET" true
+
+echo "→ Docker prüfen"
+if ! ssh "$TARGET" "command -v docker >/dev/null 2>&1"; then
+  echo "Docker fehlt auf $HOST_PART. Installation: https://docs.docker.com/engine/install/" >&2
+  exit 1
+fi
+ssh "$TARGET" "docker info >/dev/null"
+
+echo "→ Freier Platz für Docker (CS2 braucht rund 90 GB)"
+ssh "$TARGET" "df -BG /var/lib/docker 2>/dev/null | tail -1 || df -BG / | tail -1"
+
+echo "→ Volume $VOLUME anlegen (falls nicht vorhanden)"
+ssh "$TARGET" "docker volume inspect $VOLUME >/dev/null 2>&1 || docker volume create $VOLUME >/dev/null"
+
+echo "→ Image $IMAGE laden"
+ssh "$TARGET" "docker pull $IMAGE"
+
+cat <<EOF
+
+Fertig. Diesen Eintrag in CS2_DOCKER_HOSTS (JSON-Liste in der .env) aufnehmen:
+
+  {"name":"$HOST_PART","dockerHost":"ssh://$TARGET","publicHost":"$HOST_PART","portStart":27100,"portEnd":27139}
+
+Hinweise:
+- name muss pro Host eindeutig sein.
+- Ports 27100–27139 dürfen auf dem Host frei sein. Pro Host sind bis zu 20 Matches möglich.
+- Der erste Server-Start lädt die CS2-Spieldateien (rund 60 bis 90 GB). Das dauert lange.
+EOF

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))) };
+    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/app.js

@@ -20,7 +20,9 @@ export function createApp(config, { adapter: adapterOverride, logger = console }
   const service = new MatchService({ db, pools, config, notifier });
 
   let manager;
-  const adapter = adapterOverride ?? createServerAdapter(config, { getUsedPorts: () => manager.usedPorts() });
+  const adapter = adapterOverride ?? createServerAdapter(config, {
+    getUsedPorts: (host) => (host ? manager.usedPortsOn(host) : manager.usedPorts()),
+  });
   manager = new ServerManager({ db, service, adapter, config, logger });
   manager.init();
   service.startVetoTimer();

server/src/config.js

@@ -22,6 +22,32 @@ function bool(name, fallback) {
   return ['1', 'true', 'yes', 'ja', 'on'].includes(raw.toLowerCase());
 }
 
+function parseDockerHosts(raw) {
+  if (!raw) return null;
+  let list;
+  try {
+    list = JSON.parse(raw);
+  } catch {
+    throw new Error('CS2_DOCKER_HOSTS ist kein gültiges JSON');
+  }
+  if (!Array.isArray(list) || list.length === 0) throw new Error('CS2_DOCKER_HOSTS braucht mindestens einen Eintrag');
+  const names = new Set();
+  return list.map((h) => {
+    if (!h.name || !h.publicHost) throw new Error('Jeder Docker-Host braucht name und publicHost');
+    if (names.has(h.name)) throw new Error(`Docker-Host-Name "${h.name}" kommt doppelt vor`);
+    names.add(h.name);
+    return {
+      name: String(h.name),
+      dockerHost: h.dockerHost ?? null,
+      publicHost: String(h.publicHost),
+      rconHost: h.rconHost ?? h.publicHost,
+      portRangeStart: h.portStart == null ? undefined : Number(h.portStart),
+      portRangeEnd: h.portEnd == null ? undefined : Number(h.portEnd),
+      volume: h.volume ?? undefined,
+    };
+  });
+}
+
 function str(name, fallback = '') {
   const raw = process.env[name];
   return raw === undefined || raw === '' ? fallback : raw;
@@ -85,6 +111,9 @@ export function loadConfig(overrides = {}) {
       volume: str('CS2_DOCKER_VOLUME', 'cs2-mapveto-gamefiles'),
       extraArgs: str('CS2_DOCKER_EXTRA_ARGS'),
       startTimeoutMinutes: int('CS2_START_TIMEOUT_MINUTES', 20),
+      // Optional: mehrere Docker-Hosts als JSON-Liste, z. B.
+      // [{"name":"host1","dockerHost":"ssh://cs2@192.168.178.111","publicHost":"192.168.178.111","portStart":27100,"portEnd":27139}]
+      hosts: parseDockerHosts(str('CS2_DOCKER_HOSTS')),
     },
 
     staticPool: {

server/src/matchService.js

@@ -791,7 +791,14 @@ export class MatchService extends EventEmitter {
       return {
         seriesScore: maps.length ? seriesScore(maps) : null,
         currentMap: current && (current.status === 'live' || current.status === 'done')
-          ? { number: current.number, name: this.mapName(m, current.map), score: { A: current.score_a, B: current.score_b }, finished: current.status === 'done' }
+          ? {
+            number: current.number,
+            name: this.mapName(m, current.map),
+            image: JSON.parse(m.maps).find((x) => x.id === current.map)?.image ?? null,
+            color: JSON.parse(m.maps).find((x) => x.id === current.map)?.color ?? null,
+            score: { A: current.score_a, B: current.score_b },
+            finished: current.status === 'done',
+          }
           : null,
         id: m.id,
         teamA: m.team_a_name,
@@ -885,7 +892,7 @@ export class MatchService extends EventEmitter {
       requireFullTeams: this.config.requireFullTeams,
       autoAdvanceSeconds: this.config.autoAdvanceSeconds,
       maps: pool.maps,
-      veto: publicView
+      veto: publicView && match.status === 'lobby'
         ? null
         : {
             started: match.status !== 'lobby',

server/src/servers/adapter.js

@@ -29,7 +29,7 @@
  */
 
 import { DemoServerAdapter } from './demoAdapter.js';
-import { DockerServerAdapter } from './dockerAdapter.js';
+import { DockerHostPool } from './dockerAdapter.js';
 import { StaticPoolServerAdapter } from './staticPoolAdapter.js';
 
 export function createServerAdapter(config, deps) {
@@ -37,7 +37,7 @@ export function createServerAdapter(config, deps) {
     case 'demo':
       return new DemoServerAdapter(config.demo);
     case 'docker':
-      return new DockerServerAdapter(config.docker, deps);
+      return new DockerHostPool(config.docker, deps);
     case 'static':
       return new StaticPoolServerAdapter(config.staticPool, deps);
     default:

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.
@@ -37,7 +47,8 @@ export class DockerServerAdapter {
 
   async docker(args, timeout = 60_000) {
     if (this.runDocker) return this.runDocker(args);
-    const { stdout } = await exec(this.options.bin, args, { timeout, maxBuffer: 4 * 1024 * 1024 });
+    const env = this.options.dockerHost ? { ...process.env, DOCKER_HOST: this.options.dockerHost } : process.env;
+    const { stdout } = await exec(this.options.bin, args, { timeout, maxBuffer: 4 * 1024 * 1024, env });
     return stdout.trim();
   }
 
@@ -137,7 +148,14 @@ export class DockerServerAdapter {
     await this.docker(args, 15 * 60_000);
 
     return {
-      handle: { container, rconHost: this.options.rconHost, port, startedAt: Date.now(), rconPassword: secrets.rconPassword },
+      handle: {
+        container,
+        hostName: this.options.name,
+        rconHost: this.options.rconHost,
+        port,
+        startedAt: Date.now(),
+        rconPassword: secrets.rconPassword,
+      },
       host: this.options.host,
       port,
       tvPort,
@@ -192,3 +210,138 @@ export class DockerServerAdapter {
     await this.docker(['rm', '-f', handle.container]).catch(() => {});
   }
 }
+/**
+ * Mehrere Docker-Hosts. Jedes Match läuft auf dem Host mit den meisten freien Port-Paaren,
+ * der Host steht im Handle und damit im Match. Start, Status, Konfiguration und Stopp gehen
+ * immer an denselben Host. Ohne CS2_DOCKER_HOSTS gibt es genau einen Host: den bisherigen.
+ */
+export class DockerHostPool {
+  constructor(options, { getUsedPorts, runDocker } = {}) {
+    this.name = 'docker';
+    this.simulated = false;
+    this.depsGetUsedPorts = getUsedPorts;
+    const hosts = options.hosts ?? [{
+      name: 'default',
+      dockerHost: process.env.DOCKER_HOST || null,
+      publicHost: options.host,
+      rconHost: options.rconHost,
+      portRangeStart: options.portRangeStart,
+      portRangeEnd: options.portRangeEnd,
+      volume: options.volume,
+    }];
+    // Fehlende Angaben kommen aus den allgemeinen Docker-Einstellungen
+    this.hosts = hosts.map((h) => {
+      const host = {
+        name: h.name,
+        dockerHost: h.dockerHost ?? null,
+        publicHost: h.publicHost ?? options.host,
+        rconHost: h.rconHost ?? options.rconHost,
+        portRangeStart: h.portRangeStart ?? options.portRangeStart,
+        portRangeEnd: h.portRangeEnd ?? options.portRangeEnd,
+        volume: h.volume ?? options.volume,
+      };
+      return { ...options, ...host, host: host.publicHost };
+    });
+    this.adapters = new Map(this.hosts.map((h) => [h.name, new DockerServerAdapter(h, {
+      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. */
+  freeSlots(host) {
+    const used = this.getUsedPorts(host.publicHost);
+    let free = 0;
+    for (let p = host.portRangeStart; p + 1 <= host.portRangeEnd; p += 2) {
+      if (!used.has(p) && !used.has(p + 1)) free += 1;
+    }
+    return free;
+  }
+
+  /** Auslastung pro Host: Anzahl Port-Paare insgesamt und belegt. */
+  hostStats() {
+    return this.hosts.map((h) => {
+      const total = Math.floor((h.portRangeEnd - h.portRangeStart + 1) / 2);
+      return { name: h.name, publicHost: h.publicHost, total, used: total - this.freeSlots(h) };
+    });
+  }
+
+  getUsedPorts(publicHost) {
+    return this.depsGetUsedPorts?.(publicHost) ?? new Set();
+  }
+
+  pickHost() {
+    const best = this.hosts
+      .map((h) => ({ host: h, free: this.freeSlots(h) }))
+      .filter((x) => x.free > 0)
+      .sort((a, b) => b.free - a.free)[0];
+    if (!best) throw new Error('Kein Docker-Host mit freien Ports');
+    return best.host;
+  }
+
+  async start(args) {
+    return this.adapters.get(this.pickHost().name).start(args);
+  }
+
+  adapterFor(handle) {
+    const name = handle?.hostName ?? this.hosts[0].name;
+    const adapter = this.adapters.get(name);
+    if (!adapter) throw new Error(`Docker-Host "${name}" ist nicht (mehr) konfiguriert`);
+    return adapter;
+  }
+
+  async status(handle) {
+    return this.adapterFor(handle).status(handle);
+  }
+
+  async configure(handle, plan) {
+    return this.adapterFor(handle).configure(handle, plan);
+  }
+
+  async listRoundBackups(handle, matchId) {
+    return this.adapterFor(handle).listRoundBackups(handle, matchId);
+  }
+
+  async loadRoundBackup(handle, file) {
+    return this.adapterFor(handle).loadRoundBackup(handle, file);
+  }
+
+  async sendCommands(handle, commands) {
+    return this.adapterFor(handle).sendCommands(handle, commands);
+  }
+
+  async stop(handle) {
+    return this.adapterFor(handle).stop(handle);
+  }
+}

server/src/servers/serverManager.js

@@ -160,6 +160,35 @@ export class ServerManager {
     this.service.changed(matchId);
   }
 
+  /** Auslastung der Docker-Hosts mit den Matches, die dort laufen. Leer, wenn der Adapter keine Hosts kennt. */
+  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();
+    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 })),
+    }));
+  }
+
+  /** Ports, die auf einem bestimmten Docker-Host belegt sind. */
+  usedPortsOn(host) {
+    const used = new Set();
+    for (const r of this.db.prepare(`SELECT port, tv_port FROM servers WHERE host = ? AND status != 'stopped' AND port IS NOT NULL`).all(host)) {
+      used.add(r.port);
+      used.add(r.tv_port);
+    }
+    return used;
+  }
+
   usedPorts() {
     const used = new Set();
     for (const r of this.db.prepare(`SELECT host, port, tv_port FROM servers WHERE status != 'stopped' AND port IS NOT NULL`).all()) {

server/test/dockerHostPool.test.js

@@ -0,0 +1,98 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { DockerHostPool } from '../src/servers/dockerAdapter.js';
+
+const secrets = { rconPassword: 'Rcon123', serverPassword: 'Pw123', tvPassword: 'Tv123' };
+
+const hostA = { name: 'a', publicHost: '10.0.0.1', portRangeStart: 27100, portRangeEnd: 27103 }; // 2 Paare
+const hostB = { name: 'b', publicHost: '10.0.0.2', portRangeStart: 27100, portRangeEnd: 27139 }; // 20 Paare
+
+function options(hosts) {
+  return {
+    bin: 'docker', image: 'joedwards32/cs2:latest', host: '10.0.0.9', rconHost: '10.0.0.9',
+    portRangeStart: 27015, portRangeEnd: 27115, gslt: '', volume: 'cs2-mapveto-gamefiles', extraArgs: '',
+    startTimeoutMinutes: 1, hosts,
+  };
+}
+
+/** Docker-Aufrufe merken, Container gelten sofort als fertig. */
+function fakeDocker() {
+  const calls = [];
+  const run = async (args) => {
+    calls.push(args);
+    if (args[0] === 'inspect') return 'running';
+    if (args[0] === 'logs') return 'Starting CS2 Dedicated Server';
+    return '';
+  };
+  return { run, calls };
+}
+
+/** Nur die Konfiguration der Hosts, ohne auf echte Container zu warten. */
+function pool(hosts, used = {}) {
+  const docker = fakeDocker();
+  const p = new DockerHostPool(options(hosts), {
+    getUsedPorts: (publicHost) => new Set(used[publicHost] ?? []),
+    runDocker: docker.run,
+  });
+  for (const a of p.adapters.values()) a.waitForUpdateCheck = async () => {};
+  return { pool: p, calls: docker.calls };
+}
+
+test('Ohne CS2_DOCKER_HOSTS gibt es genau einen Host, wie bisher', () => {
+  const { pool: p } = pool(null);
+  assert.equal(p.hosts.length, 1);
+  assert.equal(p.hosts[0].publicHost, '10.0.0.9');
+});
+
+test('Ein Match landet auf dem Host mit den meisten freien Ports', async () => {
+  const { pool: p } = pool([hostA, hostB], { '10.0.0.1': [27100] }); // A hat ein Paar belegt, B ist frei
+  const r = await p.start({ matchId: 'm1', mode: 'competitive', secrets });
+  assert.equal(r.handle.hostName, 'b');
+  assert.equal(r.host, '10.0.0.2');
+});
+
+test('Ein voller Host wird übersprungen', async () => {
+  const fullA = Array.from({ length: 4 }, (_, i) => 27100 + i); // alle Ports von A belegt
+  const { pool: p } = pool([hostA, hostB], { '10.0.0.1': fullA });
+  const r = await p.start({ matchId: 'm2', mode: 'wingman', secrets });
+  assert.equal(r.handle.hostName, 'b');
+});
+
+test('Sind alle Hosts voll, gibt es einen klaren Fehler', async () => {
+  const fullA = Array.from({ length: 4 }, (_, i) => 27100 + i);
+  const fullB = Array.from({ length: 40 }, (_, i) => 27100 + i);
+  const { pool: p } = pool([hostA, hostB], { '10.0.0.1': fullA, '10.0.0.2': fullB });
+  await assert.rejects(p.start({ matchId: 'm3', mode: 'wingman', secrets }), /Kein Docker-Host mit freien Ports/);
+});
+
+test('Status, Stopp und Befehle gehen an den Host des Matches', async () => {
+  const { pool: p, calls } = pool([hostA, hostB], { '10.0.0.1': [27100] });
+  const r = await p.start({ matchId: 'm4', mode: 'competitive', secrets });
+  calls.length = 0;
+  await p.stop(r.handle);
+  assert.deepEqual(calls.at(-1)[0], 'rm');
+  assert.equal(calls.at(-1).at(-1), r.handle.container);
+  // Ein Handle von einem Host, der nicht mehr konfiguriert ist, wird abgelehnt
+  await assert.rejects(p.status({ ...r.handle, hostName: 'gelöscht' }), /nicht \(mehr\) konfiguriert/);
+});
+
+test('Alte Handles ohne Host-Namen laufen auf dem ersten Host', () => {
+  const { pool: p } = pool([hostA, hostB]);
+  assert.equal(p.adapterFor({ container: 'x' }), p.adapters.get('a'));
+});
+
+test('Auslastung pro Host: Port-Paare insgesamt und belegt', () => {
+  const { pool: p } = pool([hostA, hostB], { '10.0.0.1': [27100] });
+  assert.deepEqual(p.hostStats(), [
+    { name: 'a', publicHost: '10.0.0.1', total: 2, used: 1 },
+    { 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);
+});