Initial commit: Yodmon Yodeck→Zabbix bridge

- Yodeck API poller (every 10 min, paginated, 310 players) - SQLite persistence (players + activity logs) - SNMP v2c agent via net-snmp pass_persist - Zabbix API auto host creation/update (6.0+) - Flask web dashboard with live player status and log - Docker deployment with persistent volume - dev_server.py for local testing without Docker Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-04-17 09:31:00 +02:00
commit 9fc3e97546
18 changed files with 1027 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,23 @@
+# Python
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+.Python
+*.egg-info/
+dist/
+build/
+
+# Database (persistent data — not versioned)
+data/
+
+# Environment / secrets
+.env
+.env.local
+
+# IDE
+.vscode/
+.idea/
+
+# Claude Code internal
+.claude/
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -0,0 +1,72 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## What this project does
+
+Yodmon is a bridge between the **Yodeck** digital signage API and **Zabbix** monitoring. It polls the Yodeck API every 10 minutes, stores player state in SQLite, exposes the data via SNMP v2c (for Zabbix to poll every minute), auto-creates/updates Zabbix hosts, and provides a web dashboard.
+
+## Running locally (dev)
+
+```bash
+pip install flask requests apscheduler
+python dev_server.py          # web UI at http://localhost:8080
+python snmp_test.py           # print OID tree to verify SNMP data
+python snmp_test.py --filter <name_or_id>
+```
+
+`dev_server.py` sets `DB_PATH` to `./data/yodmon.db` and skips SNMP (Linux/Docker only).
+
+## Running in Docker
+
+```bash
+docker compose up -d          # SNMP on :161/udp, web UI on :8080
+```
+
+Before starting, set `APP_HOST` in `docker-compose.yml` to the host IP reachable by Zabbix, and optionally fill in `ZABBIX_URL` / `ZABBIX_PASSWORD`.
+
+## Configuration
+
+All settings come from environment variables (see `app/config.py`). Key ones:
+
+| Variable | Default | Purpose |
+|---|---|---|
+| `YODECK_API_TOKEN` | — | `Token yodeck:<secret>` format |
+| `APP_HOST` | `127.0.0.1` | IP Zabbix uses to reach this app's SNMP agent |
+| `ENTERPRISE_OID` | `.1.3.6.1.4.1.99999` | Root OID for all player data |
+| `SNMP_COMMUNITY` | `public` | SNMPv2c community string |
+| `ZABBIX_URL` | `""` | Leave empty to disable Zabbix auto-sync |
+| `DB_PATH` | `/data/yodmon.db` | SQLite file path |
+
+## Architecture
+
+```
+Yodeck API (every 10 min)
+    └── app/scheduler.py  →  app/yodeck.py     fetches all screens (paginated)
+                          →  app/database.py   upserts players + writes logs
+                          →  app/zabbix.py     creates/updates Zabbix hosts via JSON-RPC API
+
+Zabbix SNMP poll (every 1 min)
+    └── snmpd (net-snmp)  →  snmp/pass_persist.py  reads SQLite, serves OIDs over stdin/stdout
+
+Web UI
+    └── app/web.py (Flask)  →  templates/index.html  shows player table + activity log
+```
+
+**SNMP OID structure** — `ENTERPRISE_OID.1.1.<column>.<yodeck_id>`:
+- col 1 `STRING` hostname (`yodeck#<id>`)
+- col 2 `STRING` display name
+- col 3 `INTEGER` online (0/1)
+- col 4 `STRING` last_seen (ISO-8601)
+- col 5 `INTEGER` updating (0/1)
+- col 6 `INTEGER` registered (0/1)
+
+The Yodeck ID is used directly as the SNMP table index, so OIDs are stable and predictable (e.g. `.1.3.6.1.4.1.99999.1.1.3.54239` = online status of player 54239).
+
+**Database** — two tables in `yodmon.db`:
+- `players` — one row per Yodeck player, upserted on each poll
+- `logs` — append-only activity log; event types: `yodeck_fetch`, `zabbix_sync`, `snmp_transfer`, `error`
+
+**Docker entrypoint** (`entrypoint.sh`) templates `/etc/snmp/snmpd.conf` from env vars at startup, then starts `snmpd` in the background before handing off to `python main.py`.
+
+**Zabbix integration** (`app/zabbix.py`) targets Zabbix 6.0+ API (`item type 20` = SNMP agent). Set `ZABBIX_URL` to enable; the sync runs after every successful Yodeck poll.
--- a/23
+++ b/23
@@ -0,0 +1,23 @@
+FROM python:3.11-slim
+
+# Install net-snmp daemon
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        snmpd \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+RUN chmod +x /app/snmp/pass_persist.py /app/entrypoint.sh
+
+# Persistent data lives here (mount a volume to this path)
+VOLUME ["/data"]
+
+EXPOSE 161/udp
+EXPOSE 8080
+
+ENTRYPOINT ["/app/entrypoint.sh"]
--- a/app/init.py
+++ b/app/init.py
--- a/app/config.py
+++ b/app/config.py
@@ -0,0 +1,26 @@
+import os
+
+# Yodeck API
+YODECK_API_TOKEN = os.environ.get('YODECK_API_TOKEN', '')
+YODECK_API_BASE = 'https://app.yodeck.com/api/v2'
+YODECK_POLL_INTERVAL_MINUTES = int(os.environ.get('YODECK_POLL_INTERVAL_MINUTES', '10'))
+
+# Zabbix (all optional — leave ZABBIX_URL empty to disable)
+ZABBIX_URL = os.environ.get('ZABBIX_URL', '')
+ZABBIX_USER = os.environ.get('ZABBIX_USER', 'Admin')
+ZABBIX_PASSWORD = os.environ.get('ZABBIX_PASSWORD', '')
+ZABBIX_HOST_GROUP = os.environ.get('ZABBIX_HOST_GROUP', 'Yodeck Players')
+ZABBIX_SNMP_COMMUNITY = os.environ.get('ZABBIX_SNMP_COMMUNITY', 'public')
+# IP/hostname of this app reachable by the Zabbix server for SNMP polling
+APP_HOST = os.environ.get('APP_HOST', '127.0.0.1')
+
+# SNMP
+SNMP_COMMUNITY = os.environ.get('SNMP_COMMUNITY', 'public')
+# Private Enterprise Number OID used for all player data
+ENTERPRISE_OID = os.environ.get('ENTERPRISE_OID', '.1.3.6.1.4.1.99999')
+
+# Database
+DB_PATH = os.environ.get('DB_PATH', '/data/yodmon.db')
+
+# Web UI
+WEB_PORT = int(os.environ.get('WEB_PORT', '8080'))
--- a/app/database.py
+++ b/app/database.py
@@ -0,0 +1,107 @@
+import os
+import sqlite3
+import json
+from datetime import datetime, timezone
+from app.config import DB_PATH
+
+
+def _conn():
+    conn = sqlite3.connect(DB_PATH)
+    conn.row_factory = sqlite3.Row
+    return conn
+
+
+def init_db():
+    os.makedirs(os.path.dirname(os.path.abspath(DB_PATH)), exist_ok=True)
+    conn = _conn()
+    conn.executescript('''
+        CREATE TABLE IF NOT EXISTS players (
+            id            INTEGER PRIMARY KEY,
+            name          TEXT    NOT NULL,
+            online        INTEGER NOT NULL DEFAULT 0,
+            last_seen     TEXT,
+            updating      INTEGER NOT NULL DEFAULT 0,
+            registered    INTEGER NOT NULL DEFAULT 0,
+            workspace_name TEXT,
+            player_type   TEXT,
+            updated_at    TEXT    NOT NULL
+        );
+
+        CREATE TABLE IF NOT EXISTS logs (
+            id         INTEGER PRIMARY KEY AUTOINCREMENT,
+            timestamp  TEXT NOT NULL,
+            event_type TEXT NOT NULL,
+            message    TEXT NOT NULL,
+            details    TEXT
+        );
+
+        CREATE INDEX IF NOT EXISTS idx_logs_ts ON logs(timestamp DESC);
+    ''')
+    conn.commit()
+    conn.close()
+
+
+def upsert_player(p):
+    state = p.get('state', {})
+    workspace = p.get('workspace', {})
+    now = datetime.now(timezone.utc).isoformat()
+    conn = _conn()
+    conn.execute('''
+        INSERT INTO players (id, name, online, last_seen, updating, registered,
+                             workspace_name, player_type, updated_at)
+        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
+        ON CONFLICT(id) DO UPDATE SET
+            name           = excluded.name,
+            online         = excluded.online,
+            last_seen      = excluded.last_seen,
+            updating       = excluded.updating,
+            registered     = excluded.registered,
+            workspace_name = excluded.workspace_name,
+            player_type    = excluded.player_type,
+            updated_at     = excluded.updated_at
+    ''', (
+        p['id'],
+        p['name'],
+        1 if state.get('online') else 0,
+        state.get('last_seen'),
+        1 if state.get('updating') else 0,
+        1 if state.get('registered') else 0,
+        workspace.get('name'),
+        p.get('player_type'),
+        now,
+    ))
+    conn.commit()
+    conn.close()
+
+
+def get_all_players():
+    conn = _conn()
+    rows = conn.execute('SELECT * FROM players ORDER BY name').fetchall()
+    conn.close()
+    return [dict(r) for r in rows]
+
+
+def get_player_counts():
+    conn = _conn()
+    total  = conn.execute('SELECT COUNT(*) FROM players').fetchone()[0]
+    online = conn.execute('SELECT COUNT(*) FROM players WHERE online = 1').fetchone()[0]
+    conn.close()
+    return total, online
+
+
+def add_log(event_type, message, details=None):
+    now = datetime.now(timezone.utc).isoformat()
+    conn = _conn()
+    conn.execute(
+        'INSERT INTO logs (timestamp, event_type, message, details) VALUES (?, ?, ?, ?)',
+        (now, event_type, message, json.dumps(details) if details else None),
+    )
+    conn.commit()
+    conn.close()
+
+
+def get_recent_logs(limit=200):
+    conn = _conn()
+    rows = conn.execute('SELECT * FROM logs ORDER BY id DESC LIMIT ?', (limit,)).fetchall()
+    conn.close()
+    return [dict(r) for r in rows]
--- a/app/scheduler.py
+++ b/app/scheduler.py
@@ -0,0 +1,40 @@
+import logging
+from apscheduler.schedulers.background import BackgroundScheduler
+from app import database as db
+from app import yodeck as yd
+from app.zabbix import sync_to_zabbix
+from app.config import YODECK_POLL_INTERVAL_MINUTES
+
+log = logging.getLogger(__name__)
+
+
+def poll_yodeck():
+    log.info("Polling Yodeck API …")
+    try:
+        players = yd.get_all_screens()
+        for p in players:
+            db.upsert_player(p)
+        msg = f"Fetched {len(players)} players from Yodeck API"
+        db.add_log('yodeck_fetch', msg, {'count': len(players)})
+        log.info(msg)
+        # Sync host list to Zabbix after a successful fetch
+        sync_to_zabbix(players, db.add_log)
+    except Exception as exc:
+        msg = f"Yodeck poll failed: {exc}"
+        db.add_log('error', msg)
+        log.error(msg)
+
+
+def start_scheduler():
+    scheduler = BackgroundScheduler(daemon=True)
+    scheduler.add_job(
+        poll_yodeck,
+        'interval',
+        minutes=YODECK_POLL_INTERVAL_MINUTES,
+        id='yodeck_poll',
+    )
+    scheduler.start()
+    log.info("Scheduler started — Yodeck poll every %d minutes", YODECK_POLL_INTERVAL_MINUTES)
+    # Run an initial poll immediately so the DB is populated at startup
+    poll_yodeck()
+    return scheduler
--- a/app/web.py
+++ b/app/web.py
@@ -0,0 +1,32 @@
+from flask import Flask, jsonify, render_template
+from app import database as db
+
+
+def create_app():
+    app = Flask(__name__, template_folder='../templates')
+
+    @app.route('/')
+    def index():
+        total, online = db.get_player_counts()
+        return render_template(
+            'index.html',
+            total=total,
+            online=online,
+            players=db.get_all_players(),
+            logs=db.get_recent_logs(200),
+        )
+
+    @app.route('/api/stats')
+    def api_stats():
+        total, online = db.get_player_counts()
+        return jsonify({'total': total, 'online': online, 'offline': total - online})
+
+    @app.route('/api/players')
+    def api_players():
+        return jsonify(db.get_all_players())
+
+    @app.route('/api/logs')
+    def api_logs():
+        return jsonify(db.get_recent_logs(100))
+
+    return app
--- a/app/yodeck.py
+++ b/app/yodeck.py
@@ -0,0 +1,25 @@
+import logging
+import requests
+from app.config import YODECK_API_TOKEN, YODECK_API_BASE
+
+log = logging.getLogger(__name__)
+
+
+def get_all_screens():
+    """Fetch all screens/players from the Yodeck API (handles pagination)."""
+    if not YODECK_API_TOKEN:
+        raise RuntimeError("YODECK_API_TOKEN is not configured")
+
+    headers = {'Authorization': f'Token {YODECK_API_TOKEN}'}
+    players = []
+    url = f'{YODECK_API_BASE}/screens/'
+
+    while url:
+        log.debug("GET %s", url)
+        resp = requests.get(url, headers=headers, timeout=30)
+        resp.raise_for_status()
+        data = resp.json()
+        players.extend(data.get('results', []))
+        url = data.get('next')
+
+    return players
--- a/app/zabbix.py
+++ b/app/zabbix.py
@@ -0,0 +1,176 @@
+"""
+Zabbix API client for automatic host management.
+
+Each Yodeck player becomes a Zabbix host with:
+  - hostname  : yodeck#<yodeck_id>
+  - visible name: the Yodeck player's display name
+  - SNMP v2c interface pointing to this app (APP_HOST:161)
+  - Four SNMP items: online, last_seen, updating, registered
+"""
+import logging
+import requests
+from app.config import (
+    ZABBIX_URL, ZABBIX_USER, ZABBIX_PASSWORD,
+    ZABBIX_HOST_GROUP, ZABBIX_SNMP_COMMUNITY,
+    APP_HOST, ENTERPRISE_OID,
+)
+
+log = logging.getLogger(__name__)
+
+SNMP_PORT = 161
+
+# OID column indices (must match snmp/pass_persist.py)
+COL_HOSTNAME   = 1
+COL_NAME       = 2
+COL_ONLINE     = 3
+COL_LAST_SEEN  = 4
+COL_UPDATING   = 5
+COL_REGISTERED = 6
+
+
+class ZabbixClient:
+    def __init__(self):
+        self._url = f"{ZABBIX_URL.rstrip('/')}/api_jsonrpc.php"
+        self._auth = None
+        self._id = 0
+
+    def _call(self, method, params):
+        self._id += 1
+        payload = {'jsonrpc': '2.0', 'method': method, 'params': params, 'id': self._id}
+        if self._auth:
+            payload['auth'] = self._auth
+        resp = requests.post(self._url, json=payload, timeout=30)
+        resp.raise_for_status()
+        body = resp.json()
+        if 'error' in body:
+            raise RuntimeError(f"Zabbix [{method}]: {body['error'].get('data', body['error'])}")
+        return body['result']
+
+    def login(self):
+        self._auth = self._call('user.login', {'user': ZABBIX_USER, 'password': ZABBIX_PASSWORD})
+
+    def logout(self):
+        try:
+            self._call('user.logout', [])
+        except Exception:
+            pass
+        self._auth = None
+
+    # ------------------------------------------------------------------ groups
+
+    def ensure_hostgroup(self, name):
+        existing = self._call('hostgroup.get', {'filter': {'name': name}, 'output': ['groupid']})
+        if existing:
+            return existing[0]['groupid']
+        return self._call('hostgroup.create', {'name': name})['groupids'][0]
+
+    # ------------------------------------------------------------------ hosts
+
+    def get_hosts_in_group(self, groupid):
+        return self._call('host.get', {
+            'groupids': groupid,
+            'output': ['hostid', 'host', 'name'],
+        })
+
+    def create_host(self, hostname, visible_name, groupid):
+        result = self._call('host.create', {
+            'host': hostname,
+            'name': visible_name,
+            'groups': [{'groupid': groupid}],
+            'interfaces': [{
+                'type': 2,       # SNMP
+                'main': 1,
+                'useip': 1,
+                'ip': APP_HOST,
+                'dns': '',
+                'port': str(SNMP_PORT),
+                'details': {
+                    'version': 2,                    # SNMPv2c
+                    'community': ZABBIX_SNMP_COMMUNITY,
+                    'bulk': 1,
+                },
+            }],
+        })
+        return result['hostids'][0]
+
+    def update_host_name(self, hostid, visible_name):
+        self._call('host.update', {'hostid': hostid, 'name': visible_name})
+
+    # ------------------------------------------------------------------ items
+
+    def _get_interface_id(self, hostid):
+        ifaces = self._call('hostinterface.get', {
+            'hostids': hostid, 'output': ['interfaceid'],
+        })
+        return ifaces[0]['interfaceid'] if ifaces else None
+
+    def _create_item(self, hostid, interfaceid, name, key, oid, value_type):
+        """
+        type 20  = SNMP agent (Zabbix 6.0+)
+        value_type 3 = unsigned int, 4 = text
+        """
+        try:
+            self._call('item.create', {
+                'hostid':      hostid,
+                'interfaceid': interfaceid,
+                'name':        name,
+                'key_':        key,
+                'type':        20,
+                'snmp_oid':    oid,
+                'value_type':  value_type,
+                'delay':       '1m',
+                'history':     '90d',
+            })
+        except Exception as exc:
+            log.warning("Could not create item '%s' on host %s: %s", name, hostid, exc)
+
+    def add_player_items(self, hostid, yodeck_id):
+        ifid = self._get_interface_id(hostid)
+        if not ifid:
+            log.warning("No SNMP interface found for host %s", hostid)
+            return
+        base = f"{ENTERPRISE_OID}.1.1"
+        self._create_item(hostid, ifid, 'Online',     'yodeck.online',     f'{base}.{COL_ONLINE}.{yodeck_id}',     value_type=3)
+        self._create_item(hostid, ifid, 'Last Seen',  'yodeck.last_seen',  f'{base}.{COL_LAST_SEEN}.{yodeck_id}',  value_type=4)
+        self._create_item(hostid, ifid, 'Updating',   'yodeck.updating',   f'{base}.{COL_UPDATING}.{yodeck_id}',   value_type=3)
+        self._create_item(hostid, ifid, 'Registered', 'yodeck.registered', f'{base}.{COL_REGISTERED}.{yodeck_id}', value_type=3)
+
+
+def sync_to_zabbix(players, add_log_fn):
+    """Sync player list to Zabbix: create missing hosts, update names."""
+    if not ZABBIX_URL:
+        log.debug("ZABBIX_URL not configured — skipping Zabbix sync")
+        return
+
+    zbx = ZabbixClient()
+    try:
+        zbx.login()
+        groupid = zbx.ensure_hostgroup(ZABBIX_HOST_GROUP)
+        existing = {h['host']: h for h in zbx.get_hosts_in_group(groupid)}
+
+        created = updated = 0
+        for player in players:
+            yid      = player['id']
+            hostname = f"yodeck#{yid}"
+            visible  = player['name']
+
+            if hostname not in existing:
+                hostid = zbx.create_host(hostname, visible, groupid)
+                zbx.add_player_items(hostid, yid)
+                created += 1
+                log.info("Created Zabbix host: %s (%s)", hostname, visible)
+            else:
+                if existing[hostname]['name'] != visible:
+                    zbx.update_host_name(existing[hostname]['hostid'], visible)
+                    updated += 1
+
+        msg = f"Zabbix sync complete: {created} created, {updated} updated ({len(players)} total)"
+        add_log_fn('zabbix_sync', msg, {'created': created, 'updated': updated, 'total': len(players)})
+        log.info(msg)
+
+    except Exception as exc:
+        msg = f"Zabbix sync failed: {exc}"
+        add_log_fn('error', msg)
+        log.error(msg)
+    finally:
+        zbx.logout()
--- a/dev_server.py
+++ b/dev_server.py
@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+"""
+Local development server for Yodmon.
+
+Runs the web UI and Yodeck polling without Docker or snmpd.
+SNMP is not available in this mode — use Docker for full testing.
+
+Usage:
+    pip install flask requests apscheduler
+    python dev_server.py
+    Open http://localhost:8080
+"""
+import os
+import logging
+
+_HERE = os.path.dirname(os.path.abspath(__file__))
+
+# Override paths/settings before importing app modules.
+# All of these can also be set as real environment variables.
+os.environ.setdefault('DB_PATH', os.path.join(_HERE, 'data', 'yodmon.db'))
+os.environ.setdefault('YODECK_API_TOKEN', 'yodeck:fXQKm1hLvJY88necL3GiLVntpmyNS5BpKp8MpDK8GH2UvCPrg8BeHwpBSQaEtF0q')
+os.environ.setdefault('WEB_PORT', '8080')
+
+# Zabbix sync is optional — leave ZABBIX_URL empty to skip it
+os.environ.setdefault('ZABBIX_URL', '')
+
+logging.basicConfig(
+    level=logging.INFO,
+    format='%(asctime)s %(levelname)s %(name)s: %(message)s',
+)
+
+from app.config import DB_PATH, WEB_PORT
+from app.database import init_db
+from app.scheduler import start_scheduler
+from app.web import create_app
+
+if __name__ == '__main__':
+    print("=" * 60)
+    print("  Yodmon — dev server")
+    print(f"  DB  : {DB_PATH}")
+    print(f"  URL : http://localhost:{WEB_PORT}")
+    print("  SNMP: not available (Linux/Docker only)")
+    print("=" * 60)
+    print()
+
+    os.makedirs(os.path.dirname(os.path.abspath(DB_PATH)), exist_ok=True)
+    init_db()
+    start_scheduler()
+
+    app = create_app()
+    app.run(host='127.0.0.1', port=WEB_PORT, use_reloader=False)
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -0,0 +1,39 @@
+version: '3.8'
+
+services:
+  yodmon:
+    build: .
+    container_name: yodmon
+    restart: unless-stopped
+    ports:
+      - "161:161/udp"   # SNMP — polled by Zabbix every minute
+      - "8080:8080"     # Web UI
+    volumes:
+      - yodmon_data:/data
+    environment:
+      # ── Yodeck ────────────────────────────────────────────────────────────
+      YODECK_API_TOKEN: "yodeck:fXQKm1hLvJY88necL3GiLVntpmyNS5BpKp8MpDK8GH2UvCPrg8BeHwpBSQaEtF0q"
+      YODECK_POLL_INTERVAL_MINUTES: "10"
+
+      # ── SNMP ──────────────────────────────────────────────────────────────
+      SNMP_COMMUNITY: "public"
+      # Private Enterprise Number OID for this application.
+      # All player data is served under this subtree.
+      ENTERPRISE_OID: ".1.3.6.1.4.1.99999"
+
+      # ── Network ───────────────────────────────────────────────────────────
+      # IP address (or hostname) of THIS host, reachable by the Zabbix server.
+      # Zabbix will send SNMP polls to this address on port 161.
+      APP_HOST: "192.168.1.100"   # ← change to your actual host IP
+
+      # ── Zabbix API (optional) ─────────────────────────────────────────────
+      # Leave ZABBIX_URL empty to disable automatic host management.
+      # Requires Zabbix 6.0+.
+      ZABBIX_URL: ""              # e.g. "http://zabbix.example.com"
+      ZABBIX_USER: "Admin"
+      ZABBIX_PASSWORD: ""
+      ZABBIX_HOST_GROUP: "Yodeck Players"
+      ZABBIX_SNMP_COMMUNITY: "public"
+
+volumes:
+  yodmon_data:
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+set -e
+
+COMMUNITY="${SNMP_COMMUNITY:-public}"
+ENT_OID="${ENTERPRISE_OID:-.1.3.6.1.4.1.99999}"
+
+# Write snmpd.conf from environment variables so community/OID are configurable
+cat > /etc/snmp/snmpd.conf <<EOF
+# Listen on all interfaces
+agentAddress udp:0.0.0.0:161
+
+# Read-only SNMPv2c community
+rocommunity ${COMMUNITY} default
+
+# Delegate our private OID tree to the Python pass_persist script
+pass_persist ${ENT_OID} /app/snmp/pass_persist.py
+
+# Reduce noise in logs
+syslog 5
+EOF
+
+echo "[entrypoint] snmpd.conf written (community=${COMMUNITY}, oid=${ENT_OID})"
+
+# Start snmpd in the background
+snmpd -f -Lo &
+echo "[entrypoint] snmpd started (PID $!)"
+
+# Hand off to the Python application
+exec python main.py
--- a/main.py
+++ b/main.py
@@ -0,0 +1,19 @@
+import logging
+import os
+
+logging.basicConfig(
+    level=logging.INFO,
+    format='%(asctime)s %(levelname)s %(name)s: %(message)s',
+)
+
+from app.config import WEB_PORT, DB_PATH
+from app.database import init_db
+from app.scheduler import start_scheduler
+from app.web import create_app
+
+if __name__ == '__main__':
+    os.makedirs(os.path.dirname(os.path.abspath(DB_PATH)), exist_ok=True)
+    init_db()
+    start_scheduler()
+    flask_app = create_app()
+    flask_app.run(host='0.0.0.0', port=WEB_PORT, use_reloader=False)
--- a/requirements.txt
+++ b/requirements.txt
@@ -0,0 +1,3 @@
+flask>=3.0.0
+requests>=2.31.0
+apscheduler>=3.10.4
--- a/snmp/pass_persist.py
+++ b/snmp/pass_persist.py
@@ -0,0 +1,137 @@
+#!/usr/bin/env python3
+"""
+net-snmp pass_persist handler for Yodmon.
+
+Reads player data from the SQLite database and serves it over SNMP v2c.
+
+OID layout  (base = ENTERPRISE_OID.1.1):
+  base.1.<yodeck_id>  STRING   "yodeck#<id>"
+  base.2.<yodeck_id>  STRING   player display name
+  base.3.<yodeck_id>  INTEGER  online     (1 = online, 0 = offline)
+  base.4.<yodeck_id>  STRING   last_seen  (ISO-8601 timestamp)
+  base.5.<yodeck_id>  INTEGER  updating   (1 = yes, 0 = no)
+  base.6.<yodeck_id>  INTEGER  registered (1 = yes, 0 = no)
+
+pass_persist protocol (net-snmp):
+  stdin:  PING | get\n<oid> | getnext\n<oid>
+  stdout: PONG | <oid>\n<type>\n<value> | NONE
+"""
+import os
+import sys
+import sqlite3
+from datetime import datetime, timezone
+
+DB_PATH        = os.environ.get('DB_PATH', '/data/yodmon.db')
+ENTERPRISE_OID = os.environ.get('ENTERPRISE_OID', '.1.3.6.1.4.1.99999')
+BASE_OID       = f"{ENTERPRISE_OID}.1.1"
+
+# (column_index, snmp_type, value_extractor)
+COLUMNS = [
+    (1, 'STRING',  lambda p: f"yodeck#{p['id']}"),
+    (2, 'STRING',  lambda p: p.get('name') or ''),
+    (3, 'INTEGER', lambda p: str(p.get('online', 0))),
+    (4, 'STRING',  lambda p: p.get('last_seen') or ''),
+    (5, 'INTEGER', lambda p: str(p.get('updating', 0))),
+    (6, 'INTEGER', lambda p: str(p.get('registered', 0))),
+]
+
+# Rate-limit SNMP transfer log entries (at most one per minute)
+_last_log_ts = 0.0
+
+
+def _get_players():
+    try:
+        conn = sqlite3.connect(DB_PATH)
+        conn.row_factory = sqlite3.Row
+        rows = conn.execute('SELECT * FROM players ORDER BY id').fetchall()
+        conn.close()
+        return [dict(r) for r in rows]
+    except Exception:
+        return []
+
+
+def _build_tree():
+    """Return a sorted list of (oid_tuple, oid_str, snmp_type, value)."""
+    entries = []
+    for player in _get_players():
+        pid = player['id']
+        for col, typ, getter in COLUMNS:
+            oid_str   = f"{BASE_OID}.{col}.{pid}"
+            oid_tuple = tuple(int(x) for x in oid_str.lstrip('.').split('.'))
+            entries.append((oid_tuple, oid_str, typ, getter(player)))
+    entries.sort(key=lambda e: e[0])
+    return entries
+
+
+def _to_tuple(oid_str):
+    return tuple(int(x) for x in oid_str.lstrip('.').split('.'))
+
+
+def _log_transfer():
+    global _last_log_ts
+    import time
+    now = time.time()
+    if now - _last_log_ts < 60:
+        return
+    _last_log_ts = now
+    try:
+        conn = sqlite3.connect(DB_PATH)
+        conn.execute(
+            "INSERT INTO logs (timestamp, event_type, message) VALUES (?, ?, ?)",
+            (datetime.now(timezone.utc).isoformat(), 'snmp_transfer', 'SNMP data served to Zabbix'),
+        )
+        conn.commit()
+        conn.close()
+    except Exception:
+        pass
+
+
+def _reply(oid_str, typ, value):
+    _log_transfer()
+    sys.stdout.write(f"{oid_str}\n{typ}\n{value}\n")
+
+
+def main():
+    while True:
+        try:
+            line = sys.stdin.readline()
+            if not line:
+                break
+            cmd = line.strip()
+
+            if cmd == 'PING':
+                sys.stdout.write('PONG\n')
+                sys.stdout.flush()
+                continue
+
+            if cmd in ('get', 'getnext'):
+                raw_oid = sys.stdin.readline().strip()
+                tree    = _build_tree()
+
+                if cmd == 'get':
+                    tup   = _to_tuple(raw_oid)
+                    match = next((e for e in tree if e[0] == tup), None)
+                    if match:
+                        _reply(match[1], match[2], match[3])
+                    else:
+                        sys.stdout.write('NONE\n')
+
+                else:  # getnext
+                    tup = _to_tuple(raw_oid)
+                    nxt = next((e for e in tree if e[0] > tup), None)
+                    if nxt:
+                        _reply(nxt[1], nxt[2], nxt[3])
+                    else:
+                        sys.stdout.write('NONE\n')
+
+                sys.stdout.flush()
+
+        except (EOFError, BrokenPipeError, KeyboardInterrupt):
+            break
+        except Exception as exc:
+            sys.stderr.write(f"pass_persist error: {exc}\n")
+            sys.stderr.flush()
+
+
+if __name__ == '__main__':
+    main()
--- a/snmp_test.py
+++ b/snmp_test.py
@@ -0,0 +1,75 @@
+#!/usr/bin/env python3
+"""
+Print the full SNMP OID tree that would be served by the SNMP agent.
+
+Useful for verifying player data and OID mapping without running snmpd.
+Run this after dev_server.py has done at least one Yodeck poll.
+
+Usage:
+    python snmp_test.py [--filter <name_substring>]
+
+Examples:
+    python snmp_test.py                       # all players
+    python snmp_test.py --filter TRN_FRONT    # only matching names
+    python snmp_test.py --filter 54239        # by Yodeck ID
+"""
+import os
+import sys
+import argparse
+
+_HERE = os.path.dirname(os.path.abspath(__file__))
+os.environ.setdefault('DB_PATH', os.path.join(_HERE, 'data', 'yodmon.db'))
+os.environ.setdefault('ENTERPRISE_OID', '.1.3.6.1.4.1.99999')
+
+from app.config import DB_PATH, ENTERPRISE_OID
+from app.database import get_all_players, get_player_counts
+
+COLUMNS = [
+    (1, 'STRING',  'hostname',   lambda p: f"yodeck#{p['id']}"),
+    (2, 'STRING',  'name',       lambda p: p.get('name') or ''),
+    (3, 'INTEGER', 'online',     lambda p: str(p.get('online', 0))),
+    (4, 'STRING',  'last_seen',  lambda p: p.get('last_seen') or ''),
+    (5, 'INTEGER', 'updating',   lambda p: str(p.get('updating', 0))),
+    (6, 'INTEGER', 'registered', lambda p: str(p.get('registered', 0))),
+]
+
+def main():
+    parser = argparse.ArgumentParser(description='Show Yodmon SNMP OID tree')
+    parser.add_argument('--filter', metavar='TEXT', default='',
+                        help='Only show players whose name or ID contains TEXT')
+    args = parser.parse_args()
+
+    players = get_all_players()
+    total, online = get_player_counts()
+    base = ENTERPRISE_OID.lstrip('.') + '.1.1'
+
+    if args.filter:
+        players = [p for p in players
+                   if args.filter.lower() in p['name'].lower()
+                   or args.filter in str(p['id'])]
+
+    print(f"DB             : {DB_PATH}")
+    print(f"Enterprise OID : {ENTERPRISE_OID}")
+    print(f"Base OID       : .{base}.<column>.<yodeck_id>")
+    print(f"Players        : {total} total, {online} online")
+    if args.filter:
+        print(f"Filter         : '{args.filter}' -> {len(players)} match(es)")
+    print()
+
+    col_header = f"{'OID':<52} {'TYPE':<10} {'VALUE'}"
+    print(col_header)
+    print('-' * len(col_header))
+
+    for p in players:
+        pid = p['id']
+        print(f"  -- yodeck#{pid}  ({p['name']})")
+        for col, typ, label, getter in COLUMNS:
+            oid = f".{base}.{col}.{pid}"
+            val = getter(p)
+            print(f"  {oid:<50} {typ:<10} {val}")
+        print()
+
+    print(f"Total OIDs: {len(players) * len(COLUMNS)}")
+
+if __name__ == '__main__':
+    main()
--- a/templates/index.html
+++ b/templates/index.html
@@ -0,0 +1,150 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>Yodmon – Yodeck Monitor</title>
+  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css">
+  <meta http-equiv="refresh" content="60">
+  <style>
+    body { background: #f0f2f5; }
+    .stat-card  { border: none; box-shadow: 0 1px 4px rgba(0,0,0,.08); }
+    .online     { color: #198754; font-weight: 600; }
+    .offline    { color: #dc3545; font-weight: 600; }
+    .badge-yodeck_fetch   { background: #0d6efd; }
+    .badge-zabbix_sync    { background: #6f42c1; }
+    .badge-snmp_transfer  { background: #20c997; }
+    .badge-error          { background: #dc3545; }
+    .scroll-table { max-height: 420px; overflow-y: auto; }
+    thead.sticky-top th { position: sticky; top: 0; z-index: 1; }
+  </style>
+</head>
+<body>
+
+<nav class="navbar navbar-dark bg-dark mb-4 px-3">
+  <span class="navbar-brand fw-bold fs-5">Yodmon</span>
+  <span class="text-secondary small">Yodeck → Zabbix Bridge</span>
+</nav>
+
+<div class="container-fluid px-4">
+
+  <!-- Summary cards -->
+  <div class="row g-3 mb-4">
+    <div class="col-6 col-md-3">
+      <div class="card stat-card text-center py-3 h-100">
+        <div class="display-6 fw-bold text-primary">{{ total }}</div>
+        <div class="text-muted small">Total Players</div>
+      </div>
+    </div>
+    <div class="col-6 col-md-3">
+      <div class="card stat-card text-center py-3 h-100">
+        <div class="display-6 fw-bold text-success">{{ online }}</div>
+        <div class="text-muted small">Online</div>
+      </div>
+    </div>
+    <div class="col-6 col-md-3">
+      <div class="card stat-card text-center py-3 h-100">
+        <div class="display-6 fw-bold text-danger">{{ total - online }}</div>
+        <div class="text-muted small">Offline</div>
+      </div>
+    </div>
+    <div class="col-6 col-md-3">
+      <div class="card stat-card text-center py-3 h-100">
+        <div class="fs-6 fw-semibold text-secondary">
+          {% set last_fetch = logs | selectattr('event_type', 'equalto', 'yodeck_fetch') | first %}
+          {% if last_fetch %}{{ last_fetch.timestamp[:19] }} UTC{% else %}—{% endif %}
+        </div>
+        <div class="text-muted small">Last API Fetch</div>
+      </div>
+    </div>
+  </div>
+
+  <!-- Player table -->
+  <div class="card shadow-sm mb-4">
+    <div class="card-header d-flex justify-content-between align-items-center">
+      <span class="fw-semibold">Players</span>
+      <span class="badge bg-secondary">{{ total }}</span>
+    </div>
+    <div class="card-body p-0">
+      <div class="scroll-table">
+        <table class="table table-sm table-hover mb-0">
+          <thead class="table-dark sticky-top">
+            <tr>
+              <th>Yodeck ID</th>
+              <th>Name</th>
+              <th>Workspace</th>
+              <th>Type</th>
+              <th>Status</th>
+              <th>Last Seen (UTC)</th>
+              <th>Updating</th>
+              <th>Registered</th>
+            </tr>
+          </thead>
+          <tbody>
+            {% for p in players %}
+            <tr>
+              <td class="text-muted font-monospace">{{ p.id }}</td>
+              <td>{{ p.name }}</td>
+              <td>{{ p.workspace_name or '—' }}</td>
+              <td>{{ p.player_type or '—' }}</td>
+              <td>
+                {% if p.online %}
+                  <span class="online">● Online</span>
+                {% else %}
+                  <span class="offline">● Offline</span>
+                {% endif %}
+              </td>
+              <td class="font-monospace small">{{ (p.last_seen or '—')[:19] }}</td>
+              <td>{% if p.updating %}<span class="text-warning fw-semibold">Yes</span>{% else %}No{% endif %}</td>
+              <td>{% if p.registered %}<span class="text-success">✓</span>{% else %}<span class="text-danger">✗</span>{% endif %}</td>
+            </tr>
+            {% endfor %}
+          </tbody>
+        </table>
+      </div>
+    </div>
+  </div>
+
+  <!-- Activity log -->
+  <div class="card shadow-sm mb-4">
+    <div class="card-header d-flex justify-content-between align-items-center">
+      <span class="fw-semibold">Activity Log</span>
+      <span class="badge bg-secondary">last 200</span>
+    </div>
+    <div class="card-body p-0">
+      <div class="scroll-table">
+        <table class="table table-sm table-hover mb-0">
+          <thead class="table-dark sticky-top">
+            <tr>
+              <th style="width:180px">Timestamp (UTC)</th>
+              <th style="width:160px">Event</th>
+              <th>Message</th>
+            </tr>
+          </thead>
+          <tbody>
+            {% for l in logs %}
+            <tr>
+              <td class="font-monospace small text-muted">{{ l.timestamp[:19] }}</td>
+              <td>
+                <span class="badge badge-{{ l.event_type }}">{{ l.event_type }}</span>
+              </td>
+              <td class="small">{{ l.message }}</td>
+            </tr>
+            {% endfor %}
+          </tbody>
+        </table>
+      </div>
+    </div>
+  </div>
+
+</div>
+
+<div class="text-center text-muted small pb-3">
+  Page auto-refreshes every 60 seconds &nbsp;|&nbsp;
+  <a href="/api/stats" class="text-muted">API: stats</a> &nbsp;
+  <a href="/api/players" class="text-muted">players</a> &nbsp;
+  <a href="/api/logs" class="text-muted">logs</a>
+</div>
+
+</body>
+</html>