Daniel Law iDanielLaw

How to build a load balancer with BGP and ECMP using VyOS

According to this cloudflare blog article "Load Balancing without Load Balancers", we can build a rock-solid load balancer only using a router. All the magic comes from BGP and Equal-Cost Multi-Path routing.

In this howto, I will use bird as BGP router on linux instance (ie. servers).

I use GNS3 with this architecture :

app state, view state and regional state

separating components and containers

and code-splitting reducers

Assume followings:

/mykeys/.ssh/prodserver.pem - is a certificate file

umid - is a user name

111.111.111.111 - is a remote host, that mongodb runs

Let's say you want to host domains first.com and second.com.

Create folders for their files:

mainly used in start-up script

iptables -t nat -A PREROUTING -s 192.168.1.2 -i eth0 -j MASQUERADE

	#
	# CORS header support
	#
	# One way to use this is by placing it into a file called "cors_support"
	# under your Nginx configuration directory and placing the following
	# statement inside your location block(s):
	#
	# include cors_support;
	#
	# As of Nginx 1.7.5, add_header supports an "always" parameter which

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<meta http-equiv="X-UA-Compatible" content="ie=edge">
	<title>Send Bacon Example</title>
	</head>
	<body>
	<button type="button" id="button">Send Response</button>

	(1)Настройка маршрутизатора B2:

	1. Настройка IP адресов на интерфейсах
	/ip address add address=12.12.12.2/30 interface=ether5 network=12.12.12.0
	/ip address add address=13.13.13.2/30 interface=ether4 network=13.13.13.0

	2. Настройка BGP

	2.1. Настройка AS номера (Номера автономной системы) и ID маршрутизатора
	/routing bgp instance set default as=63000 router-id=2.2.2.2