Go Load Balancer

This is my own implementation of an Round-Robin API Load Balancer in Go using concurrent programming and synchronization techniques. Coding Challenges series by John Crickett https://codingchallenges.fyi/challenges/challenge-load-balancer/

• Active and Passive Healthchecks
• Healthcheck url on servers with checks dependent resources (Redis, DB, etc)
• Round-Robin requests to all active servers

TODO:

• Different algorithms: Round-Robin, Least-Connections (TODO)
• Retry & Timeout mechanism (TODO)
• Self register new servers to the LB pool

Requirements

• Install GO v1.21
• Install Make Windows | [Mac] brew install make

Setup

make build

make install

Run

Servers

Start two or more servers using different ports

golb --type node --addr :8081

golb --type node --addr :8082

Load Balancer

Start the Load Balancer and the urls of the existing servers

golb --type lb --addr :8080 --urls http://localhost:8081,http://localhost:8082

Tests

curl --parallel --parallel-immediate --parallel-max 4 --config urls.txt