load_balancer

Simple load balancer written with Boost.Asio.

HTTP requests forwarding to HTTP(S) targets is supported.

Requirements

• C++17: Robust support for most language features.
• Boost: Boost.Beast, Boost.Asio, Boost.Coroutine and Boost.ProgramOptions.
• LibSSL: HTTPS support

Building

mkdir build && cd build
cmake ..
cmake -build .

Usage

The code below will start a server listening on address 127.0.0.1:80 and proxying incoming requests to example.com or wikipedia.org, choosing using the round robin algorithm.

./load_balancer --host 127.0.0.1 --port 80 \
                --target_host example.com --target_port 80 \
                --target_host wikipedia.org --target_port 443

With docker-compose

version: "3.2"
services:
    balancer:
        image: ghcr.io/patriotrossii/load_balancer:latest
        command: >
            ./load_balancer --host 0.0.0.0 --port 80
                            --target_host example.com --target_port 80
                            --target_host wikipedia.org --target_port 443
        ports:
            - 80:80

Developer guide

Requirements

• clang-format (optional) — formatting
• clang-tidy (optional) — linting

Usage

Format code using clang-format:

make format

Run clang-tidy over project codebase:

make tidy