ryan
9d8306a64b
- MQTT client with configurable broker connection - Periodic system stats publishing (30s interval) - Command listening on MQTT topic with logging - Systemd service configuration - NixOS module for declarative deployment 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
61 lines
1.3 KiB
Markdown
61 lines
1.3 KiB
Markdown
# System Stats Daemon
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An Elixir application that runs as a systemd daemon to:
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1. Publish system stats to MQTT every 30 seconds
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2. Listen for commands over MQTT and log them to syslog
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## Configuration
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Edit `config/config.exs` to configure MQTT connection:
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```elixir
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config :system_stats_daemon, SystemStatsDaemon.MqttClient,
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host: "localhost",
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port: 1883,
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client_id: "system_stats_daemon",
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username: nil,
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password: nil,
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stats_topic: "system/stats",
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command_topic: "system/commands",
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publish_interval: 30_000
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```
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## Building
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```bash
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mix deps.get
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mix compile
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```
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## Running
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```bash
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# Development
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mix run --no-halt
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# Production release
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MIX_ENV=prod mix release
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_build/prod/rel/system_stats_daemon/bin/system_stats_daemon start
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```
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## Systemd Installation
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1. Build production release
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2. Copy binary to `/usr/local/bin/`
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3. Copy `system_stats_daemon.service` to `/etc/systemd/system/`
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4. Enable and start:
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```bash
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sudo systemctl enable system_stats_daemon
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sudo systemctl start system_stats_daemon
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```
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## Features
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- Publishes "Hello world" stats every 30 seconds to `system/stats` topic
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- Listens on `system/commands` topic and logs received messages
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- Configurable MQTT connection settings
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- Runs as systemd daemon with auto-restart
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- Logs to system journal
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