Load balancing algorithms using Node.js
npm install load-balancer-algorithmJust load balancing algorithms implementation.
Currently supported load balancing algorithms include:
- Random
- Weighted Random
- Round Robin
- Weighted Round Robin
- Consistent Hash
You can debug the project in VS CODE.
bash
$ npm i load-balancer-algorithm
or
$ yarn add load-balancer-algorithm
`Getting Started
$3
ts
import LBA, { Random } from "load-balancer-algorithm";const weightPool = [
{ host: "127.0.0.2:6061", weight: 2 },
{ host: "127.0.0.1:6062", weight: 3 },
{ host: "127.0.0.3:6063", weight: 10 },
];
const wrr = new LBA.WeightedRoundRobin(weightPool);
const wrrAddress = wrr.pick();
// should return { host }
console.log(wrrAddress)
// non-weighted
const pool = ["127.0.0.1", "127.0.0.3", "127.0.0.2", "127.0.0.4"];
const r = new Random(pool);
const rAddress = r.pick();
// should return { host }
console.log(rAddress)
`$3
js
const LBA = require('load-balancer-algorithm');const weightRandomPool = [
{ host: "127.0.0.2:6061", weight: 2 },
{ host: "127.0.0.1:6062", weight: 3 },
{ host: "127.0.0.3:6063", weight: 5 },
];
const weightedList = []
const loadBalance = new LBA.WeightedRoundRobin(weightRandomPool);
for(let i = 0; i < 10; i++){
const address = loadBalance.pick();
weightedList.push(loadBalance.getWeight(address.host))
}
// [5, 5, 3, 5, 2, 3, 5, 2, 3, 5]
console.log(weightedList)
`API
$3
The property will be get pool of an instance.$3
Returns the number of in pool object.$3
Will get a object from the pool based on the different algorithms.$3
Reset the instance fully.$3
Returns a weight value associated to the host.
Build
execute
from a terminal windowTest
let's run the test script
`bash
$ npm test
or
$ yarn test
`if you need the specify test file to run
bash
$ npx mocha -r ts-node/register --file './test/weightedRandom.test.ts'
``