zmb-webui/PHASE_3A_COMPLETE.md

Phase 3a Complete – Dashboard Quick Stats ✅

Date: 2026-04-18
Status: ✅ COMPLETE AND DEPLOYED

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What Was Implemented

Dashboard Quick Stats Cards (4 Cards)

┌──────────────┬──────────────┬──────────────┬──────────────┐
│   SYSTEM     │     CPU      │    MEMORY    │   STORAGE    │
├──────────────┼──────────────┼──────────────┼──────────────┤
│ zmbfamilie   │ 8.5%         │ 4.2%         │ ZFS Status   │
│ Uptime:      │ ████░        │ █░░░         │ Available    │
│ 3d 22h 59m   │ Load: 1.9    │ 172.6/4GB    │ or N/A       │
│ Kernel:      │              │              │              │
│ 6.17.13      │              │              │              │
└──────────────┴──────────────┴──────────────┴──────────────┘

Features Added

1. System Card

   • Hostname
   • Uptime (days, hours, minutes)
   • Kernel version

2. CPU Card

   • CPU usage percentage
   • Progress bar (green < 50%, yellow 50-75%, red > 75%)
   • Load average (1 min)

3. Memory Card

   • Memory usage percentage
   • Progress bar with color coding
   • Used / Total RAM (in GB/MB)

4. Storage Card

   • Shows "ZFS" if available
   • Shows "N/A" if ZFS not available

Backend APIs Used

✅ All endpoints already existed, no backend changes needed:

• GET /api/system/info → System information
• GET /api/system/memory → Memory usage
• GET /api/system/cpu → CPU metrics
• GET /api/system/uptime → Uptime information

Frontend Changes

frontend/lib/api.ts:

• Added getMemory() method
• Added getCpuInfo() method
• Added getUptime() method

frontend/app/page.tsx:

• Added state variables for system stats
• Added loadSystemStats() function
• Added getUsageColor() helper for progress bar colors
• Added formatBytes() helper for data formatting
• Added 4-column grid layout with stat cards
• Updated ZFS message to be less prominent (blue instead of yellow)

Testing

All APIs verified working:

✅ System: hostname "zmbfamilie", kernel "6.17.13-2-pve"
✅ Memory: 4.0 GB total, 172.6 MB used (4.2% usage)
✅ CPU: 16 cores, 8.5% usage, Load 1.9
✅ Uptime: 3 days, 22 hours, 59 minutes

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What It Looks Like

Dashboard Layout

Dashboard
Last updated: [time]                          [Refresh Button]

┌─────────────────────────────────────────────────────────────┐
│  Quick Stats (4-column grid, responsive)                    │
├─────────────────────────────────────────────────────────────┤
│
│ ┌─────────────┐  ┌─────────────┐  ┌─────────────┐  ┌──────┐
│ │ ⚡ SYSTEM   │  │ 🖥️  CPU     │  │ 💾 MEMORY   │  │ 📀   │
│ ├─────────────┤  ├─────────────┤  ├─────────────┤  │STOR. │
│ │ zmbfamilie  │  │ 8.5%        │  │ 4.2%        │  │      │
│ │ Uptime:     │  │ ████░░░░░░  │  │ █░░░░░░░░░  │  │ ZFS  │
│ │ 3d 22h 59m  │  │ Load: 1.9   │  │ 172MB/4GB   │  │ Avail│
│ │ 6.17.13     │  │             │  │             │  │      │
│ └─────────────┘  └─────────────┘  └─────────────┘  └──────┘
│
├─────────────────────────────────────────────────────────────┤
│  ZFS Not Available                                          │
│  ZFS is not installed on this system. Files and Identities  │
│  features are available.                                    │
└─────────────────────────────────────────────────────────────┘

(If ZFS available, shows Storage Pools cards below)

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Responsive Behavior

• Mobile (< 768px): 1 column
• Tablet (768px - 1024px): 2 columns
• Desktop (> 1024px): 4 columns

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Color Coding

Progress bars use system color scheme:

• 🟢 Green (< 50% usage) - Healthy
• 🟡 Yellow (50-75% usage) - Warning
• 🔴 Red (> 75% usage) - Critical

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Performance

• Stats loaded once on mount with loadSystemStats()
• Pool refresh still happens every 30 seconds
• Stats are separate, don't block pool loading
• All calls are non-blocking (Promise.all with catch)

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File Changes

Build Impact

Dashboard page: 2.81 kB → 3.63 kB (minimal increase)
Total bundle: 125 kB (shared across all pages)

Deployment

✅ Frontend built successfully
✅ All files deployed to 192.168.1.179
✅ Static export ready for production

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Next Phase (3b)

What to add next:

• Real-time graphs (CPU/Memory over time)
• Service status (sshd, samba, etc.)
• Network interfaces and IPs
• Recent system logs
• System reboot/shutdown buttons

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Success Metrics

✅ Dashboard now shows system health at a glance
✅ Replaces Cockpit dashboard functionality
✅ Mobile-responsive design
✅ Color-coded progress bars
✅ No performance impact
✅ Consistent with ZMB Webui design

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Ready for Phase 3b when you are! 🚀