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anabranch

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A simple HTTP load balancer and reverse proxy written in Go.

Features

  • Round Robin
  • Least Connection
  • Passive health check at configurable interval
  • Request Id injection
  • Config support using json

Usage

  1. Clone the repo using git clone git@github.com:arbazsiddiqui/anabranch.git && cd anabranch
  2. Use the existing binary anabranch or build a new one using go build
  3. Change the existing config to your needs or create a new one.
  4. Run the load balancer using ./anabranch -config=./config.json

Config

port

The port to the run the load balancer on.

hosts

A list of hosts we want to forward requests to.

strategy

Algorithm for load balancing. Can be roundRobin or leastConnections.

health_check_type

Defines the type of health check you want to perform on your host. Can be passive or none (for no health check). Active health check is WIP.

health_check_interval

Time interval in seconds to perform health check on hosts.

add_request_id

Boolean to add a unique request id in header of every request to downstream hosts. Header name : Request-Id

Sample Config

{
  "port": 9000,
  "hosts": [
    "http://localhost:8080",
    "http://localhost:8081",
    "http://localhost:8082"
  ],
  "strategy" : "roundRobin",
  "health_check_type" : "passive",
  "health_check_interval" : 5,
  "add_request_id" : true
}

Todo

  • Add support for retires
  • More test coverage
  • Add support for active health check

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A simple HTTP load balancer and reverse proxy written in Go.

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