Knowledge Base | Load Balancing/Routing
Serving ECC and RSA Certificates on Same IP with HAProxy
Nenad MerdanovicECC and RSA certificates and HTTPS To keep this practical, we will not go into theory of ECC or RSA certificates. Let's just mention that ECC certificates can provide as much security as RSA with much lower key size, meaning much lower computation requirements on the...
HAProxy’s Load-Balancing Algorithm for Static Content Delivery with Varnish
Baptiste AssmannHAProxy's load-balancing algorithms HAProxy supports many load-balancing algorithms which may be used in many different type of cases. That said, cache servers, which deliver most of the time the static content from your web applications, may require some specific...
Microsoft Remote Desktop Services (RDS) Load-Balancing
Baptiste AssmannMicrosoft Remote Desktop services (RDS) Remote Desktop Services, formerly Terminal Services, is a technology from Microsoft that allows users to access remotely to a session-based desktop, virtual machine-based desktop or applications hosted in a datacenter from their...
Web Application Name to Backend Mapping in HAProxy
Baptiste AssmannSynopsis Let's take a web application platform where many HTTP Host header points to. Of course, this platform hosts many backends and HAProxy is used to perform content switching based on the Host header to route HTTP traffic to each backend. HAProxy map HAProxy 1.5...
HOWTO Write Apache ProxyPass* Rules in HAProxy
Baptiste AssmannApache mod_proxy Apache webserver is a widely deployed modular web server. One of its module is called mod_proxy. It aims to turn the web server into a proxy / reverse proxy server with load-balancing capabilities. At HAProxy Technologies, we only use HAProxy :). Heh,...
Asymmetric Routing, Multiple Default Gateways on Linux with HAProxy
Baptiste AssmannWhy we may need multiple default gateways? Nowadays, Application Delivery controllers (aka Load-Balancers) become the entry point for all the applications hosted in a company or administration. That said, many different type of population could access the...
Emulating Active/Passing Application Clustering with HAProxy
Baptiste AssmannSynopsis HAProxy is a Load-Balancer, this is a fact. It is used to route traffic to servers to primarily ensure applications reliability. Most of the time, the sessions are locally stored in a server. Which means that if you want to split client traffic on multiple...
Failover and Worst Case Management with HAProxy
Baptiste AssmannSynopsis One of HAProxy strength is that it is flexible and allows to redirect traffic based on events and internal status. In the current article, I'll show how HAProxy can be useful to handle traffic when worst cases happen. By worst case I mean the moment when...
Transparent Proxying and Binding with HAProxy and ALOHA Load Balancer – HOWTO
Baptiste AssmannTransparent Proxy HAProxy works has a reverse-proxy. Which means it maintains 2 connections when allowing a client to cross it: - 1 connection between HAProxy and the client - 1 connection between HAProxy and the server HAProxy then manipulate buffers between these...
Client IP Persistence or Source IP Hash Load Balancing
Baptiste AssmannClient or Source IP ??? Well, this is roughly the same! Depends on people, environment, products, etc... I may use both of them in this article, but be aware that both of them points to the IP that is being used to get connected on the service whose being...
