Load Balancing with HAProxy: Open-Source Technology for Better Scalability, Redundancy and Availability in Your IT Infrastructure

HAProxy is a free and open-source load balancer that enables IT professionals to distribute TCP-based traffic across many backend servers. In this book, the reader will learn how to configure and leverage HAProxy for tasks that include:* Setting up reverse proxies and load-balancing backend servers* Choosing the appropriate load-balancing algorithm * Matching requests against ACLs so that we can route them to the correct servers* Monitoring servers with health checks so that failure is detected early* Managing server persistence so that a client's can be directed to the server where their session data is stored* Configuring verbose logging for TCP and HTTP-based services* Enabling SSL encryption, gzip compression and geolocation* Modifying HTTP headers, rewriting URLs and setting up redirects* Defending against malicious Web activity* Controlling HAProxy from the command line* Adding a backup load balancer