Christoffer Martinsson
1ee398e648
Services widget: - Fix disk quota formatting with proper rounding instead of truncation - Remove decimals from RAM quotas and use GB instead of G - Change quota display to use GB consistently Backups widget: - Change GiB to GB for consistency - Remove spaces between numbers and units - Update disk usage format to match other widgets: used (totalGB) - Remove percentage display for cleaner format System widget: - Add support for logged-in users in description lines - Format C-states with "C-State:" prefix on first line, indent subsequent lines - Add logged_in_users field to SystemSummary data structure Documentation: - Add example hash error output to NixOS update instructions
544 lines
20 KiB
Markdown
544 lines
20 KiB
Markdown
# CM Dashboard - Infrastructure Monitoring TUI
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A high-performance Rust-based TUI dashboard for monitoring CMTEC infrastructure. Built to replace Glance with a custom solution tailored for specific monitoring needs and API integrations. Features real-time monitoring of all infrastructure components with intelligent email notifications and automatic status calculation.
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### System Widget
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```
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┌System───────────────────────────────────────────────────────┐
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│ Memory usage │
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│✔ 3.0 / 7.8 GB │
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│ CPU load CPU temp │
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│✔ 1.05 • 0.96 • 0.58 64.0°C │
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│ C1E C3 C6 C8 C9 C10 │
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│✔ 0.5% 0.5% 10.4% 10.2% 0.4% 77.9% │
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│ GPU load GPU temp │
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│✔ — — │
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└─────────────────────────────────────────────────────────────┘
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```
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### Services Widget (Enhanced)
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```
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┌Services────────────────────────────────────────────────────┐
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│ Service Memory (GB) CPU Disk │
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│✔ Service Memory 7.1/23899.7 MiB — │
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│✔ Disk Usage — — 45/100 GB │
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│⚠ CPU Load — 2.18 — │
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│✔ CPU Temperature — 47.0°C — │
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│✔ docker-registry 0.0 GB 0.0% <1 MB │
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│✔ gitea 0.4/4.1 GB 0.2% 970 MB │
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│ 1 active connections │
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│✔ nginx 0.0/1.0 GB 0.0% <1 MB │
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│✔ ├─ docker.cmtec.se │
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│✔ ├─ git.cmtec.se │
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│✔ ├─ gitea.cmtec.se │
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│✔ ├─ haasp.cmtec.se │
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│✔ ├─ pages.cmtec.se │
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│✔ └─ www.kryddorten.se │
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│✔ postgresql 0.1 GB 0.0% 378 MB │
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│ 1 active connections │
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│✔ redis-immich 0.0 GB 0.4% <1 MB │
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│✔ sshd 0.0 GB 0.0% <1 MB │
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│ 1 SSH connection │
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│✔ unifi 0.9/2.0 GB 0.4% 391 MB │
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└────────────────────────────────────────────────────────────┘
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```
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### Storage Widget
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```
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┌Storage──────────────────────────────────────────────────────┐
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│ Drive Temp Wear Spare Hours Capacity Usage │
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│✔ nvme0n1 57°C 4% 100% 11463 932G 23G (2%) │
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│ │
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└─────────────────────────────────────────────────────────────┘
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```
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### Backups Widget
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```
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┌Backups──────────────────────────────────────────────────────┐
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│ Backup Status Details │
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│✔ Latest 3h ago 1.4 GiB │
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│ 8 archives, 2.4 GiB total │
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│✔ Disk ok 2.4/468 GB (1%) │
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└─────────────────────────────────────────────────────────────┘
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```
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### Hosts Widget
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```
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┌Hosts────────────────────────────────────────────────────────┐
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│ Host Status Timestamp │
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│✔ cmbox ok 2025-10-13 05:45:28 │
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│✔ srv01 ok 2025-10-13 05:45:28 │
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│? labbox No data received — │
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└─────────────────────────────────────────────────────────────┘
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```
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**Navigation**: `←→` hosts, `r` refresh, `q` quit
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## Key Features
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### Real-time Monitoring
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- **Multi-host support** for cmbox, labbox, simonbox, steambox, srv01
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- **Performance-focused** with minimal resource usage
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- **Keyboard-driven interface** for power users
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- **ZMQ gossip network** for efficient data distribution
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### Infrastructure Monitoring
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- **NVMe health monitoring** with wear prediction and temperature tracking
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- **CPU/Memory/GPU telemetry** with automatic thresholding
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- **Service resource monitoring** with per-service CPU and RAM usage
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- **Disk usage overview** for root filesystems
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- **Backup status** with detailed metrics and history
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- **C-state monitoring** for CPU power management analysis
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### Intelligent Alerting
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- **Agent-calculated status** with predefined thresholds
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- **Email notifications** via SMTP with rate limiting
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- **Recovery notifications** with context about original issues
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- **Stockholm timezone** support for email timestamps
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- **Unified alert pipeline** summarizing host health
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## Architecture
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### Agent-Dashboard Separation
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The system follows a strict separation of concerns:
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- **Agent**: Single source of truth for all status calculations using defined thresholds
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- **Dashboard**: Display-only interface that shows agent-provided status
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- **Data Flow**: Agent (calculations) → Status → Dashboard (display) → Colors
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### Agent Thresholds (Production)
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- **CPU Load**: Warning ≥ 5.0, Critical ≥ 8.0
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- **Memory Usage**: Warning ≥ 80%, Critical ≥ 95%
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- **CPU Temperature**: Warning ≥ 100°C, Critical ≥ 100°C (effectively disabled)
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### Email Notification System
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- **From**: `{hostname}@cmtec.se` (e.g., cmbox@cmtec.se)
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- **To**: `cm@cmtec.se`
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- **SMTP**: localhost:25 (postfix)
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- **Rate Limiting**: 30 minutes (configurable)
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- **Triggers**: Status degradation and recovery with detailed context
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## Installation
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### Requirements
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- Rust toolchain 1.75+ (install via [`rustup`](https://rustup.rs))
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- Root privileges for agent (hardware monitoring access)
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- Network access for ZMQ communication (default port 6130)
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- SMTP server for notifications (postfix recommended)
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### Build from Source
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```bash
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git clone https://github.com/cmtec/cm-dashboard.git
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cd cm-dashboard
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cargo build --release
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```
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Optimized binaries available at:
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- Dashboard: `target/release/cm-dashboard`
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- Agent: `target/release/cm-dashboard-agent`
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### Installation
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```bash
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# Install dashboard
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cargo install --path dashboard
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# Install agent (requires root for hardware access)
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sudo cargo install --path agent
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```
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## Quick Start
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### Dashboard
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```bash
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# Run with default configuration
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cm-dashboard
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# Specify host to monitor
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cm-dashboard --host cmbox
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# Override ZMQ endpoints
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cm-dashboard --zmq-endpoint tcp://srv01:6130,tcp://labbox:6130
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# Increase logging verbosity
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cm-dashboard -v
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```
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### Agent (Pure Auto-Discovery)
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The agent requires **no configuration files** and auto-discovers all system components:
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```bash
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# Basic agent startup (auto-detects everything)
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sudo cm-dashboard-agent
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# With verbose logging for troubleshooting
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sudo cm-dashboard-agent -v
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```
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The agent automatically:
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- **Discovers storage devices** for SMART monitoring
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- **Detects running systemd services** for resource tracking
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- **Configures collection intervals** based on system capabilities
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- **Sets up email notifications** using hostname@cmtec.se
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## Configuration
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### Dashboard Configuration
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The dashboard creates `config/dashboard.toml` on first run:
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```toml
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[hosts]
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default_host = "srv01"
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[[hosts.hosts]]
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name = "srv01"
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enabled = true
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[[hosts.hosts]]
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name = "cmbox"
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enabled = true
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[dashboard]
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tick_rate_ms = 250
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history_duration_minutes = 60
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[data_source]
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kind = "zmq"
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[data_source.zmq]
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endpoints = ["tcp://127.0.0.1:6130"]
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```
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### Agent Configuration (Optional)
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The agent works without configuration but supports optional settings:
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```bash
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# Generate example configuration
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cm-dashboard-agent --help
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# Override specific settings
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sudo cm-dashboard-agent \
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--hostname cmbox \
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--bind tcp://*:6130 \
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--interval 5000
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```
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## Widget Layout
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### Services Widget Structure
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The Services widget now displays both system metrics and services in a unified table:
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```
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┌Services────────────────────────────────────────────────────┐
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│ Service Memory (GB) CPU Disk │
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│✔ Service Memory 7.1/23899.7 MiB — │ ← System metric as service row
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│✔ Disk Usage — — 45/100 GB │ ← System metric as service row
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│⚠ CPU Load — 2.18 — │ ← System metric as service row
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│✔ CPU Temperature — 47.0°C — │ ← System metric as service row
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│✔ docker-registry 0.0 GB 0.0% <1 MB │ ← Regular service
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│✔ nginx 0.0/1.0 GB 0.0% <1 MB │ ← Regular service
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│✔ ├─ docker.cmtec.se │ ← Nginx site (sub-service)
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│✔ ├─ git.cmtec.se │ ← Nginx site (sub-service)
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│✔ └─ gitea.cmtec.se │ ← Nginx site (sub-service)
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│✔ sshd 0.0 GB 0.0% <1 MB │ ← Regular service
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│ 1 SSH connection │ ← Service description
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└────────────────────────────────────────────────────────────┘
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```
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**Row Types:**
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- **System Metrics**: CPU Load, Service Memory, Disk Usage, CPU Temperature with status indicators
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- **Regular Services**: Full resource data (memory, CPU, disk) with optional description lines
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- **Sub-services**: Nginx sites with tree structure, status indicators only (no resource columns)
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- **Description Lines**: Connection counts and service-specific info without status indicators
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### Hosts Widget (formerly Alerts)
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The Hosts widget provides a summary view of all monitored hosts:
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```
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┌Hosts────────────────────────────────────────────────────────┐
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│ Host Status Timestamp │
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│✔ cmbox ok 2025-10-13 05:45:28 │
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│✔ srv01 ok 2025-10-13 05:45:28 │
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│? labbox No data received — │
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└─────────────────────────────────────────────────────────────┘
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```
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## Monitoring Components
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### System Collector
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- **CPU Load**: 1/5/15 minute averages with warning/critical thresholds
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- **Memory Usage**: Used/total with percentage calculation
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- **CPU Temperature**: x86_pkg_temp prioritized for accuracy
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- **C-States**: Power management state distribution (C0-C10)
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### Service Collector
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- **System Metrics as Services**: CPU Load, Service Memory, Disk Usage, CPU Temperature displayed as individual service rows
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- **Systemd Services**: Auto-discovery of interesting services with resource monitoring
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- **Nginx Site Monitoring**: Individual rows for each nginx virtual host with tree structure (`├─` and `└─`)
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- **Resource Usage**: Per-service memory, CPU, and disk consumption
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- **Service Health**: Running/stopped/degraded status with detailed failure info
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- **Connection Tracking**: SSH connections, database connections as description lines
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### SMART Collector
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- **NVMe Health**: Temperature, wear leveling, spare blocks
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- **Drive Capacity**: Total/used space with percentage
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- **SMART Attributes**: Critical health indicators
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### Backup Collector
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- **Restic Integration**: Backup status and history
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- **Health Monitoring**: Success/failure tracking
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- **Storage Metrics**: Backup size and retention
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## Keyboard Controls
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| Key | Action |
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|-----|--------|
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| `←` / `h` | Previous host |
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| `→` / `l` / `Tab` | Next host |
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| `?` | Toggle help overlay |
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| `r` | Force refresh |
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| `q` / `Esc` | Quit |
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## Email Notifications
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### Notification Triggers
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- **Status Degradation**: Any status change to warning/critical
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- **Recovery**: Warning/critical status returning to ok
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- **Service Failures**: Individual service stop/start events
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### Example Recovery Email
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```
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✅ RESOLVED: system cpu on cmbox
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Status Change Alert
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Host: cmbox
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Component: system
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Metric: cpu
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Status Change: warning → ok
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Time: 2025-10-12 22:15:30 CET
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Details:
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Recovered from: CPU load (1/5/15min): 6.20 / 5.80 / 4.50
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Current status: CPU load (1/5/15min): 3.30 / 3.17 / 2.84
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--
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CM Dashboard Agent
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Generated at 2025-10-12 22:15:30 CET
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```
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### Rate Limiting
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- **Default**: 30 minutes between notifications per component
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- **Testing**: Set to 0 for immediate notifications
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- **Configurable**: Adjustable per deployment needs
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## Development
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### Project Structure
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```
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cm-dashboard/
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├── agent/ # Monitoring agent
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│ ├── src/
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│ │ ├── collectors/ # Data collection modules
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│ │ ├── notifications.rs # Email notification system
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│ │ └── simple_agent.rs # Main agent logic
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├── dashboard/ # TUI dashboard
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│ ├── src/
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│ │ ├── ui/ # Widget implementations
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│ │ ├── data/ # Data structures
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│ │ └── app.rs # Application state
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├── shared/ # Common data structures
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└── config/ # Configuration files
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```
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### Development Commands
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```bash
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# Format code
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cargo fmt
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# Check all packages
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cargo check
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# Run tests
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cargo test
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# Build release
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cargo build --release
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# Run with logging
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RUST_LOG=debug cargo run -p cm-dashboard-agent
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```
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### Architecture Principles
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#### Status Calculation Rules
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- **Agent calculates all status** using predefined thresholds
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- **Dashboard never calculates status** - only displays agent data
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- **No hardcoded thresholds in dashboard** widgets
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- **Use "unknown" when agent status missing** (never default to "ok")
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#### Data Flow
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```
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System Metrics → Agent Collectors → Status Calculation → ZMQ → Dashboard → Display
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↓
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Email Notifications
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```
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#### Pure Auto-Discovery
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- **No config files required** for basic operation
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- **Runtime discovery** of system capabilities
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- **Service auto-detection** via systemd patterns
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- **Storage device enumeration** via /sys filesystem
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## Troubleshooting
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### Common Issues
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#### Agent Won't Start
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```bash
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# Check permissions (agent requires root)
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sudo cm-dashboard-agent -v
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# Verify ZMQ binding
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sudo netstat -tulpn | grep 6130
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# Check system access
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sudo smartctl --scan
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```
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#### Dashboard Connection Issues
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```bash
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# Test ZMQ connectivity
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cm-dashboard --zmq-endpoint tcp://target-host:6130 -v
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# Check network connectivity
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telnet target-host 6130
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```
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#### Email Notifications Not Working
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```bash
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# Check postfix status
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sudo systemctl status postfix
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# Test SMTP manually
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telnet localhost 25
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# Verify notification settings
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sudo cm-dashboard-agent -v | grep notification
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```
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### Logging
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Set `RUST_LOG=debug` for detailed logging:
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```bash
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RUST_LOG=debug sudo cm-dashboard-agent
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RUST_LOG=debug cm-dashboard
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```
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## License
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MIT License - see LICENSE file for details.
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## Contributing
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1. Fork the repository
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2. Create feature branch (`git checkout -b feature/amazing-feature`)
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3. Commit changes (`git commit -m 'Add amazing feature'`)
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4. Push to branch (`git push origin feature/amazing-feature`)
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5. Open Pull Request
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For bugs and feature requests, please use GitHub Issues.
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## NixOS Integration
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### Updating cm-dashboard in NixOS Configuration
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When new code is pushed to the cm-dashboard repository, follow these steps to update the NixOS configuration:
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#### 1. Get the Latest Commit Hash
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```bash
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# Get the latest commit from the API
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curl -s "https://gitea.cmtec.se/api/v1/repos/cm/cm-dashboard/commits?sha=main&limit=1" | head -20
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# Or use git
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git log --oneline -1
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```
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#### 2. Update the NixOS Configuration
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Edit `hosts/common/cm-dashboard.nix` and update the `rev` field:
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```nix
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src = pkgs.fetchFromGitea {
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domain = "gitea.cmtec.se";
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owner = "cm";
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repo = "cm-dashboard";
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rev = "f786d054f2ece80823f85e46933857af96e241b2"; # Update this
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hash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA="; # Reset temporarily
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};
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```
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#### 3. Get the Correct Hash
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Build with placeholder hash to get the actual hash:
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```bash
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nix-build --no-out-link -E 'with import <nixpkgs> {}; fetchFromGitea {
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domain = "gitea.cmtec.se";
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owner = "cm";
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repo = "cm-dashboard";
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rev = "YOUR_COMMIT_HASH";
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hash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
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}' 2>&1 | grep "got:"
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```
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Example output:
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```
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error: hash mismatch in fixed-output derivation '/nix/store/...':
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specified: sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
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got: sha256-x8crxNusOUYRrkP9mYEOG+Ga3JCPIdJLkEAc5P1ZxdQ=
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```
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#### 4. Update the Hash
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Replace the placeholder with the correct hash from the error message (the "got:" line):
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```nix
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hash = "sha256-vjy+j91iDCHUf0RE43anK4WZ+rKcyohP/3SykwZGof8="; # Use actual hash
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```
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#### 5. Update Cargo Dependencies (if needed)
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If Cargo.lock has changed, you may need to update `cargoHash`:
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```bash
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# Build to get cargo hash error
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nix-build --no-out-link --expr 'with import <nixpkgs> {}; rustPlatform.buildRustPackage rec {
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pname = "cm-dashboard";
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version = "0.1.0";
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src = fetchFromGitea {
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domain = "gitea.cmtec.se";
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owner = "cm";
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repo = "cm-dashboard";
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rev = "YOUR_COMMIT_HASH";
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hash = "YOUR_SOURCE_HASH";
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};
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cargoHash = "";
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nativeBuildInputs = [ pkg-config ];
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buildInputs = [ openssl ];
|
|
buildAndTestSubdir = ".";
|
|
cargoBuildFlags = [ "--workspace" ];
|
|
}' 2>&1 | grep "got:"
|
|
```
|
|
|
|
Then update `cargoHash` in the configuration.
|
|
|
|
#### 6. Commit the Changes
|
|
```bash
|
|
git add hosts/common/cm-dashboard.nix
|
|
git commit -m "Update cm-dashboard to latest version"
|
|
git push
|
|
```
|
|
|
|
### Example Update Process
|
|
```bash
|
|
# 1. Get latest commit
|
|
LATEST_COMMIT=$(curl -s "https://gitea.cmtec.se/api/v1/repos/cm/cm-dashboard/commits?sha=main&limit=1" | grep '"sha"' | head -1 | cut -d'"' -f4)
|
|
|
|
# 2. Get source hash
|
|
SOURCE_HASH=$(nix-build --no-out-link -E "with import <nixpkgs> {}; fetchFromGitea { domain = \"gitea.cmtec.se\"; owner = \"cm\"; repo = \"cm-dashboard\"; rev = \"$LATEST_COMMIT\"; hash = \"sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=\"; }" 2>&1 | grep "got:" | cut -d' ' -f12)
|
|
|
|
# 3. Update configuration and commit
|
|
echo "Latest commit: $LATEST_COMMIT"
|
|
echo "Source hash: $SOURCE_HASH"
|
|
``` |