LBA

lba (LoadBalancer Algorithm) is a go implementation of the balancing algorithm.

• Round Robin
• IP Hash
• Least Connections
• ...updating...

Installation

First, install Go, and install lba package:

go get -u github.com/ductnn/lba

Then, import package in your code:

import "github.com/ductnn/lba"

Example

• Round Robin:

package main

import (
	"net/url"

	roundrobin "github.com/stsmdt/round-robin"
)

func main() {
	rr, _ := roundrobin.New(
		[]url.URL{
			{Host: "192.168.1.1"},
			{Host: "192.168.1.2"},
			{Host: "192.168.1.3"},
			{Host: "192.168.1.4"},
			{Host: "192.168.1.5"},
		},
	)

	rr.Next() // {Host: "192.168.1.1"}
	rr.Next() // {Host: "192.168.1.2"}
	rr.Next() // {Host: "192.168.1.3"}
	rr.Next() // {Host: "192.168.1.4"}
	rr.Next() // {Host: "192.168.1.5"}
	rr.Next() // {Host: "192.168.1.1"}
}

• Least Connections:

lc, err := New([]*url.URL{
    {Host: "192.168.1.10"},
    {Host: "192.168.1.11"},
    {Host: "192.168.1.12"},
})

src1, done1 := lc.Next() // {Host: "192.168.1.10"}

src2, done2 := lc.Next() // {Host: "192.168.1.11"}

done1() // Reduce connection of src1

src3, done3 := lc.Next() // {Host: "192.168.1.10"}

• IP Hash:

ip, _ := iphash.New([]*url.URL{
    {Host: "192.168.1.10"},
    {Host: "192.168.1.11"},
    {Host: "192.168.1.12"},
})

ip.Next(&url.URL{Host: "192.168.1.10"})  // {Host: "192.168.1.10"}
ip.Next(&url.URL{Host: "192.168.1.10"})  // {Host: "192.168.1.10"}
ip.Next(&url.URL{Host: "192.168.1.44"})  // {Host: "192.168.1.11"}
ip.Next(&url.URL{Host: "192.168.1.44"})  // {Host: "192.168.1.11"}