Scale and deploy Plumber APIs and Shiny applications with ease and efficiency.

Welcome to faucet, your go-to solution for deploying Plumber APIs and Shiny Applications with blazing speed and efficiency. faucet is a high-performance server built with Rust, offering Round Robin and IP Hash load balancing for seamless scaling and distribution of your R applications. Whether you're a data scientist, developer, or DevOps enthusiast, faucet streamlines the deployment process, making it easier than ever to manage replicas and balance loads effectively.

• High Performance: faucet is designed with speed in mind, leveraging Rust's performance benefits to ensure your R applications run smoothly and efficiently.

• Load Balancing: Choose between Round Robin and IP Hash load balancing strategies to distribute incoming requests among multiple instances, optimizing resource utilization.

• Replicas: Easily scale your Plumber APIs and Shiny Applications by running multiple replicas, allowing for improved performance and increased availability.

• Simplified Deployment: faucet simplifies the deployment process, making it a breeze to get your R applications up and running quickly.

• Asynchronous & Concurrent: faucet leverages asynchronous and concurrent processing, ensuring optimal utilization of resources and responsive handling of requests.

To display the help message, run the following command:

faucet --help

To start a plumber API, you will simply need to specify the directory containing the 'plumber.R' file. faucet will automatically detect the file and start the API.

faucet start --dir /path/to/plumber/api

The server will automatically listen on port 3838 by default. To change the host and port, use the --host flag to specify the socket address to bind to the service.

faucet start --dir /path/to/plumber/api --host 0.0.0.0:3000

By default faucet will start as many workers as there are logical cores on the machine. To specify the number of workers, use the --workers flag.

faucet start --dir /path/to/plumber/api --workers 4

To start a Shiny Application, you will simply need to specify the directory containing the 'app.R' file. faucet will automatically detect the file and start the application.

faucet start --dir /path/to/shiny/app

The server will automatically listen on port 3838 by default. To change the host and port, use the --host flag to specify the socket address to bind to the service.

faucet start --dir /path/to/shiny/app --host 0.0.0.0:3000

By default faucet will start as many workers as there are logical cores on the machine. To specify the number of workers, use the --workers flag.

faucet start --dir /path/to/shiny/app --workers 4

Note: On Shiny applications, faucet will be forced to use IP Hash load balancing. This is because Shiny applications require a persistent connection between the client and the server. If Round Robin load balancing is used, the client will be redirected to a different instance on each request, causing the connection to be lost.

faucet supports two load balancing strategies for Plumber APIs: Round Robin and IP Hash. By default, faucet will use Round Robin load balancing. To change the strategy, use the --strategy flag.

faucet start --dir /path/to/plumber/api --strategy ip-hash

By default, faucet will try to detect the type of application based on the files in the specified directory. If you want to explicitly set the type of application, use the --type flag.

faucet start --dir /path/to/plumber/api --type plumber

faucet start --dir /path/to/shiny/app --type shiny

If you want to run multiple faucet instances behind a reverse proxy, or you want to enable HTTPS, you may use Nginx or any other reverse proxy. However, to make sure faucet correctly detects the client IP address, you will need to set the X-Forwarded-For header or the X-Real-IP header.

server {
    listen 80;
    server_name example.com;

    location / {
        proxy_pass http://...;
        proxy_set_header  X-Real-IP $remote_addr;
        proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
        ...
    }
}

Additionally, when running faucet, you will need to set the -i / --ip-from flat to either x-forwarded-for or x-real-ip depending on which header you set in Nginx.

faucet start --dir /path/to/plumber/api --ip-from x-forwarded-for

Every option / flag can also be set using an environment variable, this is useful for example when using Docker.

Download the latest release of faucet for Linux from the GitHub Releases page. This should work with most Linux distributions.

FAUCET_VERSION="v0.6.0"

wget https://github.com/ixpantia/faucet/releases/download/$FAUCET_VERSION/faucet-x86_64-unknown-linux-musl -O faucet

# Make the binary executable
chmod +x faucet

# Move the binary to a directory in your PATH (e.g., user local bin)
mv faucet ~/.local/bin

Install faucet with Cargo, Rust's package manager.

1. Install Rust by following the instructions here.

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

2. Install faucet with Cargo.

cargo install faucet-server --version ^0.6

1. Install Rust by following the instructions here.

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

2. Clone the faucet repository.

git clone https://github.com/ixpantia/faucet.git

3. Build faucet with Cargo.

cargo install --path .

If you want to contribute to faucet please read the CONTRIBUTING.md document.