Overview

Mastering Modern HAProxy: Load Balancing, Reverse Proxying & High Availability for Cloud-Native and On-Prem EnvironmentsThe definitive hands-on guide to mastering HAProxy in 2025 - from fundamentals to full-stack automation and production-grade deployment. Modern applications demand reliability, security, and performance at scale - and HAProxy remains the most trusted open-source load balancer powering the world's most resilient architectures. This comprehensive, practical guide takes you from the foundational principles of load balancing and reverse proxying all the way to automated, high-availability, cloud-native deployments integrated with Prometheus, Grafana, Keepalived, Terraform, Docker, and Kubernetes. Built for beginners to intermediate DevOps engineers, sysadmins, and homelab builders, this book provides step-by-step workflows, real configuration blueprints, and complete practice labs that mirror real-world production systems. Every concept is demonstrated through fully reproducible hands-on exercises, ensuring that you don't just learn HAProxy - you deploy and operate it confidently. What You'll Learn Understand modern load balancing architectures and HAProxy's multi-threaded design. Deploy secure, high-performance reverse proxies with TLS 1.3, HSTS, and OCSP stapling. Configure advanced routing and traffic management using ACLs, content switching, and stick tables. Build multi-node HAProxy clusters with Keepalived and VRRP for seamless failover. Integrate Prometheus, Grafana, and Alertmanager for real-time observability and alerting. Automate deployments with Terraform and Ansible using reusable templates and IaC blueprints. Operate HAProxy within containerized and Kubernetes environments as an ingress controller. Complete a full-stack capstone project: deploy and monitor a production-grade HAProxy cluster across hybrid cloud infrastructure. Inside the Book Part I: Foundations of Load Balancing & HAProxy Fundamentals Part II: Configuration, Routing & Security Part III: Observability, Scaling & High Availability Part IV: HAProxy in Modern Cloud & Container Environments Part V: Full-Stack End-to-End Capstone Project Appendices A-E: CLI Cheat Sheets, Automation Templates, Troubleshooting Guides, Security Checklists & Community Resources Why This Book Stands OutUnlike generic references, Mastering Modern HAProxy focuses on actionable implementation. You'll build and automate from day one - applying the exact same techniques used in enterprise-grade infrastructures and modern hybrid clouds. Each chapter concludes with a Practice Lab to reinforce learning through applied configuration and testing. Whether you're optimizing backend traffic for a global web service, securing API gateways, or deploying HAProxy in a home or cloud lab, this book gives you the clarity, control, and confidence to design and operate scalable, fault-tolerant systems that perform under pressure. Mastering Modern HAProxy (2025 Edition) is your complete field guide to building reliable, secure, and fully automated load-balancing environments - on-prem, in the cloud, or anywhere in between. If you're serious about modern traffic engineering, reverse proxying, and high availability, this is the one HAProxy book you'll keep open on your terminal.

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