Linux

Linux Virtual Server Administration
RHEL5: Linux Virtual Server (LVS)

Linux Virtual Server Administration: RHEL5: Linux Virtual Server (LVS)
Copyright © 2007 Red Hat, Inc. Building a Linux Virtual Server (LVS) system offers highly-available and scalable solution for production services using specialized routing and load-balancing techniques configured through the PIRANHA. This bookdiscusses the configuration of high-performance systems and services with Red Hat Enterprise Linux and LVS.

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Tableof Contents
1. Introduction to Linux Virtual Server .......................................................................... 1 1. Technology Overview ..................................................................................... 1 2. Basic Configurations ...................................................................................... 2 2.1. Load-Balancing Clusters Using LinuxVirtual Servers ............................. 2 2. Linux Virtual Server Overview ................................................................................. 3 1. A Basic LVS Configuration .............................................................................. 3 1.1. Data Replication and Data Sharing Between Real Servers ..................... 5 2. A Three Tiered LVS Configuration................................................................... 5 3. LVS Scheduling Overview .............................................................................. 7 3.1. Scheduling Algorithms ......................................................................... 7 3.2. Server Weight and Scheduling ............................................................. 8 4. Routing Methods............................................................................................ 9 4.1. NAT Routing ....................................................................................... 9 4.2. Direct Routing ....................................................................................11 5. Persistence and Firewall Marks......................................................................12 5.1. Persistence ........................................................................................12 5.2. Firewall Marks ....................................................................................13 6. LVS Cluster — A Block Diagram ....................................................................13 6.1. Components of an LVS Cluster...........................................................14 3. Initial LVS Configuration ........................................................................................16 1. Configuring Services on the LVS Routers .......................................................16 2. Setting a Password for the Piranha Configuration Tool ....................................17 3. Starting the Piranha Configuration Tool Service...