kodegen Daemon

A high-performance Unix daemon library with crossbeam-based service management.

Features

• Zero-allocation hot paths: Uses crossbeam channels and fixed-size enums
• True Unix daemon: Double-fork daemonization with systemd auto-detection
• Service management: Supervise processes with automatic restart and health monitoring
• System integration: Self-installation with systemd/launchd support
• Async compatible: Can manage async applications while using sync internals

Quick Start

As a Library

Add to your Cargo.toml:

[dependencies]
kodegen-daemon = "0.1"

Use in your application:

use kodegen_daemon::{ServiceConfig, ServiceDefinition, ServiceManager, daemonise};
use std::path::Path;

fn main() -> anyhow::Result<()> {
    // Daemonize the process
    let pid_file = Path::new("/var/run/mydaemon.pid");
    daemonise(&pid_file)?;

    // Create service configuration
    let mut config = ServiceConfig::default();
    config.services.push(ServiceDefinition {
        name: "my-service".to_string(),
        command: "/usr/bin/my-app --daemon".to_string(),
        auto_restart: true,
        ..Default::default()
    });

    // Start daemon manager
    let manager = ServiceManager::new(&config)?;
    manager.run()?; // Runs until SIGTERM/SIGINT
    Ok(())
}

As a Standalone Daemon

Build and install:

cargo build --release
sudo ./target/release/kodegend install

Configure services in /etc/kodegend/services/:

# /etc/kodegend/services/my-app.toml
name = "my-app"
command = "/usr/local/bin/my-app --serve"
auto_restart = true
user = "www-data"
restart_delay_s = 5

[health_check]
check_type = "http"
target = "http://localhost:8080/health"
interval_secs = 30

Start the daemon:

sudo systemctl start kodegend

Architecture

• ServiceManager: Central event loop using crossbeam channels
• ServiceWorker: Individual service supervisor threads
• IPC: Wait-free message passing with Cmd/Evt enums
• Daemon: Unix daemonization with systemd detection
• Installer: Self-installation with system integration

System Requirements

• Unix-like OS (Linux, macOS)
• systemd (Linux) or launchd (macOS) for system integration
• Root privileges for installation

License

Apache-2.0