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systemg

Systemg - A Lightweight Process Manager

Systemg is a simple, fast, and dependency-free process manager written in Rust.
It aims to provide a minimal alternative to systemd and other heavyweight service managers, focusing on ease of use, clarity, and performance.

Why Systemg?

Traditional process managers like systemd are complex, heavy, and introduce unnecessary dependencies.
Systemg offers a lightweight, configuration-driven solution that's easy to set up and maintain.

Features

Declarative YAML Configuration - Define services, dependencies, and restart policies easily.
Automatic Process Monitoring - Restart crashed services based on custom policies.
Environment Variable Support - Load variables from .env files and per-service configurations.
Minimal & Fast - Built with Rust, designed for performance and low resource usage.
No Root Required - Unlike systemd, it doesn't take over PID 1.

Comparison vs Alternatives

Feature	Systemg	systemd	Supervisor	Docker Compose
Lightweight	Yes	No (Heavy)	No (Python)	No (Containers)
No Dependencies	Yes	No (DBus, etc.)	No (Python)	No (Docker)
Simple Config	YAML	Complex Units	INI	YAML
Process Monitoring	Yes	Yes	Yes	Yes
PID 1 Required?	No	Yes	No	No
Handles Dependencies?	Yes	Yes	No	Yes

Getting Started

Installation

Install systemg using cargo:

cargo install sysg

Or download the pre-built binary from the releases page.

Basic Commands

The sysg command-line interface provides several subcommands for managing processes.

Start

Start the process manager with the given configuration:

# Start with default configuration file (systemg.yaml)
sysg start

# Start with a specific configuration file
sysg start --config systemg.yaml

# Start as a daemon process
sysg start --config systemg.yaml --daemonize

Stop

Stop the process manager or a specific service:

# Stop all services
sysg stop

# Stop a specific service
sysg stop --service myapp

Restart

Restart the process manager:

# Restart with current configuration
sysg restart

# Restart with a different configuration
sysg restart --config new-config.yaml

Status

Check the status of running services:

# Show status of all services
sysg status

# Show status of a specific service
sysg status --service webserver

Logs

View logs for a specific service:

# View the last 50 lines of logs for all services
sysg logs

# View logs for a specific service
sysg logs api-service

# View a custom number of log lines
sysg logs database --lines 100

Testing

To run the test suite:

# Run all tests
cargo test

# Run specific test
cargo test test_service_lifecycle

Build from Source

To build systemg from source:

# Clone the repository
git clone https://github.com/ra0x3/systemg.git
cd systemg

# Build the project
cargo build --release

# The binary will be available at target/release/sysg

Contributing

Contributions to systemg are welcome! Please see the CONTRIBUTING.md file for guidelines.

systemg 0.4.0