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Abstract

A fast and robust Layer 7 distributed load balancer capable of many different load balancing strategies.

Installation

git clone https://github.com/markrepedersen/loblaw
cd loblaw
cargo run

Configuration

Specify a .toml configuration file (default: ‘config.toml’) with your configuration details.
The following options are allowed:

# Required
ip = "127.0.0.1"

# Required
port = "8080"

# Required
strategy = "RoundRobin" 

# Required
[[backends]] 
ip = "3.220.112.94"
port = "80"
path = "/ip"

[[backends]]
ip = "3.220.112.94"
port = "80"
path = "/ip"

[[backends]]
ip = "3.220.112.94"
port = "80"
path = "/ip"

# Required
[health_check]
port = 8080
timeout = 10
interval = 5
healthy_threshold = 10
unhealthy_threshold = 10

Description

Loblaw will proxy requests from clients and distribute them to available servers based on a configured strategy.

./images/diagram.svg

Strategies

The strategy define the rules for which a given request is sent to a certain server. The following are possible strategies to choose from:

  • Round Robin (Default)
  • Weighted Round Robin
  • IP Hash
  • URL Path Hash

Session Stickiness

Session stickiness creates an affinity between a client and a server. This is sometimes useful for architectures that weren’t designed with load balancers in mind. It is also useful to take advantage of server caching of resources as well as optimizing network resource usage. TODO: Currently only cookie-based sticky sessions are supported.