IPVS (IP Virtual Server)

1. Overview

Definition: IPVS (IP Virtual Server) is a transport-layer load balancing tool implemented within the Linux Kernel.
- It is part of the LVS (Linux Virtual Server) project.
- Operates at Layer 4 of the OSI model (Transport Layer).
Purpose: Distributes network traffic across multiple servers.
- Used for scaling services by spreading client requests.
- Ensures high availability and reliability of applications.
Use Cases:
- Commonly used for load balancing web servers.
- Supports both TCP and UDP protocols.
Implementation:
- Kernel module: Requires appropriate configuration of kernel and network settings.
- Works in conjunction with iptables for packet filtering.