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Configure 60s Sync Interval & Fix SSH Connection Limits

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DeNNiiInc
2025-12-27 22:34:57 +11:00
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PROXMOX_DEPLOY_TEMPLATE.md
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@@ -273,86 +273,51 @@ curl -I http://localhost
---
## 🔄 Step 6: Setup Auto-Sync (Every 30 Seconds)
## 🔄 Step 6: Setup Auto-Sync (Every 60 Seconds)
We use **Systemd Timers** instead of Cron because they support sub-minute intervals and prevent overlapping execution.
We use **Systemd Timers** instead of Cron because they support reliable intervals and execution tracking.
### 6.1 Create robust auto-sync script
### 6.1 Create robust auto-sync script (with file locking)
```bash
cat > /var/www/your-app-name/auto-sync.sh << 'EOF'
#!/bin/bash
# Configuration
APP_NAME="your-app-name"
APP_DIR="/var/www/$APP_NAME"
LOG_FILE="/var/log/$APP_NAME-autosync.log"
LOCK_FILE="/var/lock/$APP_NAME-sync.lock"
# Singleton execution with flock (prevents overlap)
exec 9>"$LOCK_FILE"
if ! flock -n 9; then
exit 0
fi
log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> "$LOG_FILE"; }
cd "$APP_DIR" || exit 1
# Fetch and check
if ! git fetch origin main --quiet; then exit 1; fi
LOCAL=$(git rev-parse HEAD)
REMOTE=$(git rev-parse origin/main)
if [ "$LOCAL" != "$REMOTE" ]; then
log "🔄 Changes detected! Pulling..."
git pull origin main >> "$LOG_FILE" 2>&1
if git diff --name-only "$LOCAL" "$REMOTE" | grep -q "package.json"; then
log "📦 package.json changed. Installing dependencies..."
npm install --production >> "$LOG_FILE" 2>&1 || exit 1
fi
log "🔄 Restarting service..."
systemctl restart "$APP_NAME"
log "✅ Sync complete."
fi
EOF
chmod +x /var/www/your-app-name/auto-sync.sh
# ... (Script content same as before, ensures single instance)
```
### 6.2 Create Systemd Timer Units
Create the Service (What to run):
```bash
cat > /etc/systemd/system/your-app-name-sync.service << 'EOF'
Service Unit (`/etc/systemd/system/your-app-name-sync.service`):
```ini
[Unit]
Description=Auto-sync Service
[Service]
Type=oneshot
ExecStart=/var/www/your-app-name/auto-sync.sh
User=root
EOF
```
Create the Timer (When to run):
```bash
cat > /etc/systemd/system/your-app-name-sync.timer << 'EOF'
Timer Unit (`/etc/systemd/system/your-app-name-sync.timer`):
```ini
[Unit]
Description=Run auto-sync every 30 seconds
Description=Run auto-sync every 60 seconds
[Timer]
OnBootSec=1min
OnUnitActiveSec=30s
OnUnitActiveSec=60s
Unit=your-app-name-sync.service
[Install]
WantedBy=timers.target
EOF
```
> **💡 Pro Tip: Fix SSH Connection Limits**
> If you get "Connection refused" errors during deployment, reliable automation requires higher SSH limits.
> Update `/etc/ssh/sshd_config`:
> ```bash
> MaxStartups 100:30:200
> MaxSessions 100
> ```
> Then run `systemctl restart ssh`.
### 6.3 Enable the Timer
```bash