Knowledge Base | Basics
5 Ways to Extend HAProxy with Lua
Adis NezirovićUse Lua to add fetches, converters, actions, services and tasks to HAProxy. Did you know that HAProxy embeds the Lua scripting language, which you can use to add new functionality? HAProxy features an extremely powerful and flexible configuration language and gives...
Exploring the HAProxy Stats Page
Nick RamirezThe HAProxy Stats page provides a near real-time feed of data about the state of your proxied services. In a previous blog post, Introduction to HAProxy Logging, you saw how to harness the power of HAProxy to improve observability into the state of your load...
Extending HAProxy with the Stream Processing Offload Engine
Christopher FauletThe HAProxy Stream Processing Offload Engine filter enables you to extend HAProxy in any language without modifying its core codebase. Inspired by the possibilities? Read on to learn more. Imagine you're living in the distant future and you're stomping around town in...
Introduction to HAProxy Logging
Moemen MhedhbiWhen it comes to operationalizing your log data, HAProxy provides a wealth of information. In this blog post, we demonstrate how to set up HAProxy logging, target a Syslog server, understand the log fields, and suggest some helpful tools for parsing log files. [On...
The Four Essential Sections of an HAProxy Configuration
Chad LavoieAn HAProxy configuration file guides the behavior of your HAProxy load balancer. In this post, we demonstrate its four most essential sections. There are four essential sections to an HAProxy configuration file. They are global, defaults, frontend, and backend. These...
Introduction to HAProxy Maps
Chad LavoieAn HAProxy map file stores key-value pairs and is the starting point for some inventive behavior including dynamic rate limiting and blue-green deployments. Dictionaries. Maps. Hashes. Associative arrays. Can you imagine life without these wonderful key-value data...
Introduction to HAProxy Stick Tables
Chad LavoieHTTP requests are stateless by design. However, this raises some questions regarding how to track user activities, including malicious ones, across requests so that you can collect metrics, block users, and make other decisions based on state. The only way to track...
Introduction to HAProxy ACLs
Chad LavoieAn HAProxy ACL lets you define custom rules for blocking malicious requests, choosing backends, redirecting to HTTPS and using cached objects. See The Webinar: Introduction to HAProxy ACLs: Building Rules for Dynamically Routing Requests, Redirecting Users and...
HAProxy Log Customization
Baptiste AssmannOne of HAProxy's greatest strengths has got to be its logging system. The amount of information it provides can be invaluable when diagnosing unexpected behavior, studying your website's traffic, or just getting a feel for how HAProxy works. HAProxy comes with a few...
ALOHA Load Balancer as a Reverse Proxy
Baptiste AssmannSynopsis You own small public subnet and want to be able to access multiple web sites or application behind a single public IP address. Basically, you want to use your Aloha load-balancer as a reverse proxy. Diagram The diagram below shows how the reverse proxy works....
