This guide explains the four operating modes of Linux Virtual Server (LVS)—NAT, DR, TUN, and FULLNAT—detailing packet flows, configuration steps, required kernel parameters, health checks, troubleshooting tips, and best‑practice deployment scripts for building a reliable, high‑performance load‑balancing cluster.
This article explains load balancing fundamentals, compares hardware appliances with the Linux Virtual Server (LVS) solution, details NAT, DR, and TUN modes, and provides step‑by‑step ipvsadm commands, Keepalived high‑availability configuration, kernel tuning, and troubleshooting for production environments.
This article introduces IPVS, the Linux kernel‑level load balancer, explains its scheduling algorithms, forwarding modes (DR, NAT, IP tunneling), and provides step‑by‑step commands to configure virtual services, real servers, and routing in a virtualized environment.
This article provides a comprehensive guide to configuring LVS DR mode, including virtual router setup, network addressing, ipvsadm scheduling, firewall marking, persistence mechanisms, and high‑availability health‑check scripts for robust load‑balancing deployments.
This article walks through a practical setup of LVS DR mode load balancing on four UCloud servers, covering network configuration, ARP tweaks, ipvsadm rules, VIP assignment, troubleshooting steps, and implementing high‑availability with Keepalived, complete with command examples and visual screenshots.
This article explains the limitations of NAT and FULLNAT load‑balancing models, introduces DR and TUN modes that let real servers reply directly to clients, and details the required ARP and loopback configurations to hide VIPs and reduce bottlenecks.
This article explains the origin and necessity of load balancing, compares DNS, hardware, and software approaches, details the Linux Virtual Server (LVS) architecture, its netfilter foundation, and the DR, NAT, and Tunnel operating modes with their advantages, disadvantages, and typical use cases.
This article explains the origins, types, and inner workings of load balancing—including DNS, hardware, and software solutions—covers the Linux Virtual Server (LVS) architecture, netfilter fundamentals, and compares DR, NAT, and Tunnel modes with their advantages, drawbacks, and ideal use cases.
This article explains the evolution of load balancing, compares DNS, hardware, and software approaches, details the Linux Virtual Server (LVS) architecture, its integration with netfilter, and walks through the DR, NAT, Tunnel, and FullNAT modes with their advantages, drawbacks, and typical use cases.
This guide walks through expanding an e‑commerce website from 1,000 QPS to 3,000 QPS by deploying an LVS load‑balancing cluster, covering NAT and DR modes, IPVS configuration, kernel tuning, persistent connections, and SSL termination with step‑by‑step commands and diagrams.
This article explains the architecture of Linux Virtual Server (LVS) load balancers, detailing the roles of the Director server, Real servers, shared storage, and the three primary IPVS scheduling modes—DR, NAT/FULL NAT, and TUN—including their mechanisms, advantages, and configuration considerations.
This article provides a comprehensive technical guide to Linux Virtual Server (LVS) architecture, covering the load‑balancer layer, server array, shared storage, and detailed explanations of DR, NAT, Full NAT, and IP‑tunnel modes along with their scheduling algorithms and practical deployment considerations.
This article explains the fundamentals of load balancing, introduces Linux Virtual Server (LVS) and its architecture, and provides a step‑by‑step guide to set up a DR‑mode LVS cluster with Keepalived on CentOS, including configuration, testing, and failover verification.
