feat: Automated failover system with certificate sync and DNS monitoring
Certificate Synchronization (COMPLETE): - Created cert-push-to-hostinger.sh on srvrevproxy02 - Hourly cron job pushes /etc/letsencrypt/ from srvrevproxy02 to Hostinger - SSH key authentication (id_ed25519_hostinger) configured - 22MB of Let's Encrypt certificates synced successfully - Automatic nginx reload on Hostinger after sync - Log: /var/log/cert-push-hostinger.log DNS Failover Monitor (READY): - Python script: dns-failover-monitor.py on Hostinger - INWX API integration for automatic DNS updates - Health monitoring every 30s, failover after 3 failures (90s) - Systemd service with auto-restart - Setup script: setup-inwx-env.sh for INWX credentials - Log: /var/log/dns-failover.log Architecture: - Primary: srvrevproxy02 (10.0.0.29) - Certificate source - Secondary: Hostinger (72.62.39.24) - Failover target - Nginx on Hostinger now uses flow.egonetix.de certificate Next Steps: - Run /root/setup-inwx-env.sh on Hostinger - Enter INWX credentials - Start monitoring: systemctl start dns-failover
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mindesbunister
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docs/DEPLOY_SECONDARY_MANUAL.md
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docs/DEPLOY_SECONDARY_MANUAL.md
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# Manual Deployment to Secondary Server (Hostinger VPS)
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## Quick Start - Deploy Secondary Now
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### Step 1: Complete the Code Sync (if not finished)
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```bash
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# Wait for rsync to complete or run it manually
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rsync -avz --delete \
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--exclude 'node_modules' \
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--exclude '.next' \
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--exclude '.git' \
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--exclude 'logs/*' \
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--exclude 'postgres-data' \
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/home/icke/traderv4/ root@72.62.39.24:/home/icke/traderv4/
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```
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### Step 2: Backup and Sync Database
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```bash
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# Dump database from primary
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docker exec trading-bot-postgres pg_dump -U postgres trading_bot_v4 > /tmp/trading_bot_backup.sql
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# Copy to secondary
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scp /tmp/trading_bot_backup.sql root@72.62.39.24:/tmp/trading_bot_backup.sql
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```
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### Step 3: Deploy on Secondary
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```bash
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# SSH to secondary
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ssh root@72.62.39.24
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cd /home/icke/traderv4
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# Start PostgreSQL
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docker compose up -d postgres
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# Wait for PostgreSQL to be ready
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sleep 10
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# Restore database
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docker exec -i trading-bot-postgres psql -U postgres -c "DROP DATABASE IF EXISTS trading_bot_v4; CREATE DATABASE trading_bot_v4;"
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docker exec -i trading-bot-postgres psql -U postgres trading_bot_v4 < /tmp/trading_bot_backup.sql
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# Verify database
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docker exec trading-bot-postgres psql -U postgres trading_bot_v4 -c "SELECT COUNT(*) FROM \"Trade\";"
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# Build trading bot
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docker compose build trading-bot
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# Start trading bot (but keep it inactive - secondary waits in standby)
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docker compose up -d trading-bot
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# Check logs
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docker logs -f trading-bot-v4
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```
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### Step 4: Verify Everything Works
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```bash
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# Check all containers running
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docker ps
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# Should see:
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# - trading-bot-v4 (your bot)
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# - trading-bot-postgres
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# - n8n (already running)
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# Test health endpoint
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curl http://localhost:3001/api/health
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# Check database connection
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docker exec trading-bot-postgres psql -U postgres -c "\l"
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```
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## Ongoing Sync Strategy
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### Option A: PostgreSQL Streaming Replication (Best)
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**Setup once, sync forever in real-time (1-2 second lag)**
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See `HA_DATABASE_SYNC_STRATEGY.md` for complete setup guide.
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Quick version:
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```bash
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# On PRIMARY
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docker exec trading-bot-postgres psql -U postgres -c "
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CREATE USER replicator WITH REPLICATION ENCRYPTED PASSWORD 'ReplPass2024!';
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"
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docker exec trading-bot-postgres bash -c "cat >> /var/lib/postgresql/data/postgresql.conf << CONF
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wal_level = replica
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max_wal_senders = 3
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wal_keep_size = 64
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CONF"
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docker exec trading-bot-postgres bash -c "echo 'host replication replicator 72.62.39.24/32 md5' >> /var/lib/postgresql/data/pg_hba.conf"
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docker restart trading-bot-postgres
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# On SECONDARY
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docker compose down postgres
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rm -rf postgres-data/
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mkdir -p postgres-data
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docker run --rm \
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-v $(pwd)/postgres-data:/var/lib/postgresql/data \
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-e PGPASSWORD='ReplPass2024!' \
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postgres:16-alpine \
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pg_basebackup -h <hetzner-ip> -p 5432 -U replicator -D /var/lib/postgresql/data -P -R
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docker compose up -d postgres
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# Verify
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docker exec trading-bot-postgres psql -U postgres -c "SELECT * FROM pg_stat_wal_receiver;"
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```
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### Option B: Cron Job Backup (Simple but 6hr lag)
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```bash
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# On PRIMARY - Create sync script
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cat > /root/sync-to-secondary.sh << 'SCRIPT'
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#!/bin/bash
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LOG="/var/log/secondary-sync.log"
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echo "[$(date)] Starting sync..." >> $LOG
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# Sync code
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rsync -avz --delete \
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--exclude 'node_modules' --exclude '.next' --exclude '.git' \
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/home/icke/traderv4/ root@72.62.39.24:/home/icke/traderv4/ >> $LOG 2>&1
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# Sync database
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docker exec trading-bot-postgres pg_dump -U postgres trading_bot_v4 | \
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ssh root@72.62.39.24 "docker exec -i trading-bot-postgres psql -U postgres -c 'DROP DATABASE IF EXISTS trading_bot_v4; CREATE DATABASE trading_bot_v4;' && docker exec -i trading-bot-postgres psql -U postgres trading_bot_v4" >> $LOG 2>&1
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echo "[$(date)] Sync complete" >> $LOG
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SCRIPT
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chmod +x /root/sync-to-secondary.sh
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# Test it
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/root/sync-to-secondary.sh
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# Schedule every 6 hours
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crontab -e
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# Add: 0 */6 * * * /root/sync-to-secondary.sh
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```
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## Health Monitor Setup
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Create health monitor to automatically switch DNS on failure:
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```bash
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# Create health monitor script (run on laptop or third server)
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cat > ~/trading-bot-monitor.py << 'SCRIPT'
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#!/usr/bin/env python3
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import requests
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import time
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import os
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CLOUDFLARE_API_TOKEN = "your-token"
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CLOUDFLARE_ZONE_ID = "your-zone-id"
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CLOUDFLARE_RECORD_ID = "your-record-id"
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PRIMARY_IP = "hetzner-ip"
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SECONDARY_IP = "72.62.39.24"
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PRIMARY_URL = f"http://{PRIMARY_IP}:3001/api/health"
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SECONDARY_URL = f"http://{SECONDARY_IP}:3001/api/health"
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TELEGRAM_BOT_TOKEN = os.getenv("TELEGRAM_BOT_TOKEN")
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TELEGRAM_CHAT_ID = os.getenv("TELEGRAM_CHAT_ID")
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current_active = "primary"
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def send_telegram(message):
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try:
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url = f"https://api.telegram.org/bot{TELEGRAM_BOT_TOKEN}/sendMessage"
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requests.post(url, json={"chat_id": TELEGRAM_CHAT_ID, "text": message}, timeout=10)
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except:
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pass
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def check_health(url):
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try:
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response = requests.get(url, timeout=10)
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return response.status_code == 200
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except:
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return False
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def update_cloudflare_dns(ip):
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url = f"https://api.cloudflare.com/client/v4/zones/{CLOUDFLARE_ZONE_ID}/dns_records/{CLOUDFLARE_RECORD_ID}"
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headers = {"Authorization": f"Bearer {CLOUDFLARE_API_TOKEN}", "Content-Type": "application/json"}
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data = {"type": "A", "name": "flow.egonetix.de", "content": ip, "ttl": 120, "proxied": False}
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response = requests.put(url, json=data, headers=headers, timeout=10)
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return response.status_code == 200
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print("Health monitor started")
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send_telegram("🏥 Trading Bot Health Monitor Started")
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while True:
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primary_healthy = check_health(PRIMARY_URL)
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secondary_healthy = check_health(SECONDARY_URL)
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print(f"Primary: {'✅' if primary_healthy else '❌'} | Secondary: {'✅' if secondary_healthy else '❌'}")
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if current_active == "primary" and not primary_healthy and secondary_healthy:
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print("FAILOVER: Switching to secondary")
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if update_cloudflare_dns(SECONDARY_IP):
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current_active = "secondary"
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send_telegram(f"🚨 FAILOVER: Primary DOWN, switched to Secondary ({SECONDARY_IP})")
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elif current_active == "secondary" and primary_healthy:
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print("RECOVERY: Switching back to primary")
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if update_cloudflare_dns(PRIMARY_IP):
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current_active = "primary"
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send_telegram(f"✅ RECOVERY: Primary restored ({PRIMARY_IP})")
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time.sleep(30)
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SCRIPT
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chmod +x ~/trading-bot-monitor.py
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# Run in background
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nohup python3 ~/trading-bot-monitor.py > ~/monitor.log 2>&1 &
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```
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## Verification Checklist
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- [ ] Secondary server has all code from primary
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- [ ] Secondary has same .env file (same wallet key!)
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- [ ] PostgreSQL running on secondary
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- [ ] Database restored and contains trades
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- [ ] Trading bot built successfully
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- [ ] Trading bot starts without errors
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- [ ] Health endpoint responds on secondary
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- [ ] n8n running on secondary (already was)
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- [ ] Sync strategy chosen and configured
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- [ ] Health monitor running (if automated failover desired)
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- [ ] DNS ready to switch (Cloudflare setup)
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## Test Failover
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```bash
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# 1. Stop primary bot
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ssh root@hetzner-ip "cd /home/icke/traderv4 && docker compose stop trading-bot"
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# 2. Verify secondary takes over (if health monitor running)
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# OR manually update DNS to point to 72.62.39.24
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# 3. Send test webhook to secondary
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curl -X POST http://72.62.39.24:3001/api/trading/execute \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer your-api-key" \
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-d '{"test": true}'
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# 4. Check logs
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ssh root@72.62.39.24 "docker logs --tail=50 trading-bot-v4"
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# 5. Restart primary
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ssh root@hetzner-ip "cd /home/icke/traderv4 && docker compose start trading-bot"
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```
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## Summary
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**Your secondary server is now a full replica:**
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- ✅ Same code as primary
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- ✅ Same database (snapshot)
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- ✅ Same configuration (.env)
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- ✅ Ready to take over if primary fails
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**Choose sync strategy:**
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- 🔄 **PostgreSQL Streaming Replication** - Real-time, 1-2s lag (BEST)
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- ⏰ **Cron Job** - Simple, 6-hour lag (OK for testing)
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**Enable automated failover:**
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- 🤖 Run health monitor script (switches DNS automatically)
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- 📱 Gets Telegram alerts on failover/recovery
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- ⚡ 30-60 second failover time
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