hop3-server

Core server for the Hop3 Platform-as-a-Service.

Overview

hop3-server is the central orchestrator that handles application deployments, process management, reverse proxy configuration, and addon services. It provides a JSON-RPC API for communication with hop3-cli and hop3-tui.

Features

• Git-push deployments: Deploy applications via git push
• Automatic build system: Detects language (Python, Node, Ruby, Go, Rust, etc.) and builds automatically
• Process management: Manages app processes based on Procfile via uWSGI
• Reverse proxy: Nginx/Caddy/Traefik with automatic SSL certificates
• Addon services: PostgreSQL, MySQL, Redis management
• Plugin architecture: Extensible via pluggy-based plugins
• JSON-RPC API: For CLI and TUI communication

Installation

Production

curl -LsSf https://hop3.cloud/install-server.py | sudo python3 -

Development

pip install hop3-server

Quick Start

# Run the server
hop3-server serve

# Run with specific host/port
hop3-server serve --host 0.0.0.0 --port 8000

Configuration

Server configuration via environment variables or /etc/hop3/config.toml:

Architecture

hop3-server/
├── src/hop3/
│   ├── server/           # Litestar ASGI application
│   │   ├── asgi.py       # App factory
│   │   └── controllers/  # API endpoints
│   ├── commands/         # RPC command handlers
│   ├── deployers/        # Deployment orchestration
│   ├── orm/              # SQLAlchemy models
│   ├── plugins/          # Plugin system
│   │   ├── build/        # Builders, language toolchains
│   │   ├── deploy/       # Deployers (uWSGI, static)
│   │   ├── proxy/        # Nginx, Caddy, Traefik
│   │   └── addons/       # PostgreSQL, MySQL, Redis
│   ├── core/             # Core abstractions
│   │   ├── protocols.py  # Plugin protocols
│   │   └── hookspecs.py  # Hook specifications
│   └── toolchains/       # Language toolchains
└── tests/
    ├── a_unit/           # Unit tests
    ├── b_integration/    # Integration tests
    └── c_e2e/            # End-to-end tests (Docker, real deploy)

Filesystem Layout

/home/hop3/
├── apps/<app_name>/
│   ├── git/              # Bare git repository
│   ├── src/              # Checked-out source code
│   ├── data/             # Persistent data
│   └── log/              # Log files
├── nginx/                # Nginx configs and certs
├── uwsgi-available/      # uWSGI configs
├── uwsgi-enabled/        # Active uWSGI configs
└── hop3.db               # SQLite database

Development

# Unit tests
uv run pytest tests/a_unit/ -v

# Integration tests
uv run pytest tests/b_integration/ -v

# End-to-end tests (requires Docker)
uv run pytest tests/c_e2e/ -v

# Lint and format
uv run ruff check src/
uv run ruff format src/

Documentation

• User Guide
• Plugin Development

Related Packages

• hop3-cli - CLI client for this server
• hop3-tui - TUI client for this server
• hop3-installer - Installation tools

License

Apache-2.0 - Copyright (c) 2024-2026, Abilian SAS