Red Hat CLUSTER SUITE 4.7 DM MULTIPATH Instalační příručka Strana 1

Red Hat Cluster SuiteConfiguring and Managing aCluster

iv Introductionbutton on a GUI screen or windowThis style indicates that the text can be found on a clickable button on a GUI screen.For example:Click

84 Chapter 6. Introduction to Linux Virtual Serverhardware to implement a fully redundant environment in which services can run uninter-rupted by hard

Chapter 7.Linux Virtual Server OverviewRed Hat Enterprise Linux LVS clustering uses a Linux machine called the active routerto send requests from the

86 Chapter 7. Linux Virtual Server OverviewFigure 7-1. A Basic LVS ConfigurationService requests arriving at the LVS cluster are addressed to a virtual

Chapter 7. Linux Virtual Server Overview 87The active router also dynamically monitors the overall health of the specific services onthe real servers t

88 Chapter 7. Linux Virtual Server Overview7.2. A Three Tiered LVS ConfigurationFigure 7-2 shows a typical three tiered LVS cluster topology. In this e

Chapter 7. Linux Virtual Server Overview 89cluster to serve both of these roles simultaneously.The third tier in the above example does not have to us

90 Chapter 7. Linux Virtual Server Overviewthat it is network-connection based and not host-based. LVS round-robin schedulingalso does not suffer the

Chapter 7. Linux Virtual Server Overview 91the real server with the least connections from the overall pool of real servers to thesubset of real serve

92 Chapter 7. Linux Virtual Server Overview7.4.1. NAT RoutingFigure 7-3, illustrates an LVS cluster utilizing NAT routing to move requests between the

Chapter 7. Linux Virtual Server Overview 93In this example, the LVS router’s public LVS floating IP address and private NAT floatingIP address are alias

Introduction vNoteRemember that Linux is case sensitive. In other words, a rose is not a ROSE is not arOsE.TipThe directory /usr/share/doc/ contains a

94 Chapter 7. Linux Virtual Server Overview7.5.2. Firewall MarksFirewall marks are an easy and efficient way to a group ports used for a protocol or gr

Chapter 7. Linux Virtual Server Overview 95The pulse daemon runs on both the active and passive LVS routers. On the backup router,pulse sends a heartb

96 Chapter 7. Linux Virtual Server Overview7.6.1.3. ipvsadmThis service updates the IPVS routing table in the kernel. The lvs daemon sets up andadmini

Chapter 8.Initial LVS ConfigurationAfter installing Red Hat Enterprise Linux, you must take some basic steps to set up boththe LVS routers and the real

98 Chapter 8. Initial LVS ConfigurationIf you are clustering multi-port services or using firewall marks, you must also enable theiptables service.It is

Chapter 8. Initial LVS Configuration 99If the password is changed during an active Piranha Configuration Tool session, theadministrator is prompted to p

100 Chapter 8. Initial LVS Configuration8.3.1. Configuring the Piranha Configuration Tool Web ServerPortThe Piranha Configuration Tool runs on port 3636 b

Chapter 8. Initial LVS Configuration 101You can also allow specific hosts or subnets as seen in this example:Order deny,allowDeny from allAllow from 192

102 Chapter 8. Initial LVS Configuration8.6. Configuring Services on the Real ServersIf the real servers in the cluster are Red Hat Enterprise Linux sys

Chapter 9.Setting Up a Red Hat Enterprise Linux LVSClusterA Red Hat Enterprise Linux LVS cluster consists of two basic groups: the LVS routers andthe

vi Introduction3.1. Send in Your FeedbackIf you spot a typo, or if you have thought of a way to make this manualbetter, we would love to hear from you

104 Chapter 9. Setting Up a Red Hat Enterprise Linux LVS Clusterration Tool. In particular, FTP services and the use of firewall marks requires extrama

Chapter 9. Setting Up a Red Hat Enterprise Linux LVS Cluster 105After configuring the primary LVS router node’s network interfaces, configure the backup

106 Chapter 9. Setting Up a Red Hat Enterprise Linux LVS ClusterIt is best to turn off extraneous network interfaces by setting ONBOOT=no in their net

Chapter 9. Setting Up a Red Hat Enterprise Linux LVS Cluster 107ImportantThe adapter devices on the LVS routers must be configured to access the same n

108 Chapter 9. Setting Up a Red Hat Enterprise Linux LVS ClusterChecking the Status of Network InterfacesIf you need to check which network interfaces

Chapter 9. Setting Up a Red Hat Enterprise Linux LVS Cluster 109If iptables is active, it displays a set of rules. If rules are present, type the foll

110 Chapter 9. Setting Up a Red Hat Enterprise Linux LVS Clusteran FTP client connects to an FTP server it opens a connection to the FTP control port

Chapter 9. Setting Up a Red Hat Enterprise Linux LVS Cluster 1119.4.3. Creating Network Packet Filter RulesBefore assigning any iptables rules for FTP

112 Chapter 9. Setting Up a Red Hat Enterprise Linux LVS Clusterpasv_address=X.X.X.XReplace X.X.X.X with the VIP address of the LVS system.For configur

Chapter 9. Setting Up a Red Hat Enterprise Linux LVS Cluster 113This saves the settings in /etc/sysconfig/iptables so they can be recalled at boottime

Introduction vii• Software updates, errata and maintenance via Red Hat Network• Red Hat technical support resources, documentation, and KnowledgebaseI

114 Chapter 9. Setting Up a Red Hat Enterprise Linux LVS Cluster

Chapter 10.Configuring the LVS Routers with PiranhaConfiguration ToolThe Piranha Configuration Tool provides a structured approach to creating the necess

116 Chapter 10. Configuring the LVS Routers with Piranha Configuration Toolor real IP address for the server followed by :3636. Once the browser connect

Chapter 10. Configuring the LVS Routers with Piranha Configuration Tool 117Figure 10-2. The CONTROL/MONITORING PanelAuto updateThe status display on thi

118 Chapter 10. Configuring the LVS Routers with Piranha Configuration ToolThe Auto update feature does not work with all browsers, such as Mozilla.Upda

Chapter 10. Configuring the LVS Routers with Piranha Configuration Tool 119Figure 10-3. The GLOBAL SETTINGS PanelThe top half of this panel sets up the

120 Chapter 10. Configuring the LVS Routers with Piranha Configuration ToolTipThe primary LVS router’s private IP can be configured on any interface that

Chapter 10. Configuring the LVS Routers with Piranha Configuration Tool 121TipThe first time you visit this screen, it displays an "inactive" B

122 Chapter 10. Configuring the LVS Routers with Piranha Configuration ToolRedundant server private IPEnter the backup node’s private real IP address in

Chapter 10. Configuring the LVS Routers with Piranha Configuration Tool 123Figure 10-5. The VIRTUAL SERVERS PanelEach server displayed in the VIRTUAL SE

viii Introduction

124 Chapter 10. Configuring the LVS Routers with Piranha Configuration Toolare located along the top of the page. But before configuring any of the subse

Chapter 10. Configuring the LVS Routers with Piranha Configuration Tool 125ProtocolChoose between UDP and TCP in the drop-down menu. Web servers typical

126 Chapter 10. Configuring the LVS Routers with Piranha Configuration ToolQuiesce serverWhen the Quiesce server radio button is selected, anytime a new

Chapter 10. Configuring the LVS Routers with Piranha Configuration Tool 127NoteBefore the advent of firewall marks, persistence limited by subnet was a c

128 Chapter 10. Configuring the LVS Routers with Piranha Configuration ToolFigure 10-7. The REAL SERVER SubsectionClick the ADD button to add a new serv

Chapter 10. Configuring the LVS Routers with Piranha Configuration Tool 129Figure 10-8. The REAL SERVER Configuration PanelThis panel consists of three e

130 Chapter 10. Configuring the LVS Routers with Piranha Configuration ToolWeightAn integer value indicating this host’s capacity relative to that of ot

Chapter 10. Configuring the LVS Routers with Piranha Configuration Tool 131Figure 10-9. The EDIT MONITORING SCRIPTS SubsectionSending ProgramFor more ad

132 Chapter 10. Configuring the LVS Routers with Piranha Configuration ToolThe following is a sample script to use as a guide when composing an external

Chapter 10. Configuring the LVS Routers with Piranha Configuration Tool 133WarningRemember to click the ACCEPT button after making any changes in this p

I. Using the Red Hat Cluster ManagerClustered systems provide reliability, scalability, and availability to critical production ser-vices. Using the R

134 Chapter 10. Configuring the LVS Routers with Piranha Configuration ToolThe best way to do this is to use the scp command.ImportantTo use scp the ssh

Chapter 10. Configuring the LVS Routers with Piranha Configuration Tool 135Next either open an ssh session to the backup router or log into the machine

136 Chapter 10. Configuring the LVS Routers with Piranha Configuration Tool

III. AppendixesThis section is licensed under the GNU Free Documentation License. For details refer tothe Copyright page.Table of ContentsA. Supplemen

Appendix A.Supplementary Hardware InformationThe following sections provide additional information about configuring the hardware usedin a cluster syst

140 Appendix A. Supplementary Hardware InformationFigure A-1. Single-controller RAID Array Connected to Single-initiator Fibre Chan-nel InterconnectsT

Appendix A. Supplementary Hardware Information 141Figure A-2. Dual-controller RAID Array Connected to Single-initiator Fibre ChannelInterconnectsA.3.

142 Appendix A. Supplementary Hardware Information• Use the appropriate SCSI cable to connect each host bus adapter to the storage enclosure.Setting h

Appendix A. Supplementary Hardware Information 143Figure A-5. Dual-controller RAID Array Connected to Single-initiator SCSI BusesA.3.1. SCSI Configurat

144 Appendix A. Supplementary Hardware InformationA.3.2. SCSI Bus TerminationA SCSI bus is an electrical path between two terminators. A device (host

Appendix A. Supplementary Hardware Information 145A cluster supports LVD (low voltage differential) buses. The maximum length of a single-initiator LV

146 Appendix A. Supplementary Hardware Information

Appendix B.Selectively Installing Red Hat Cluster SuitePackagesB.1. Installing the Red Hat Cluster Suite PackagesRed Hat Cluster Suite consists of the

148 Appendix B. Selectively Installing Red Hat Cluster Suite Packages• gnbd-kernel — Kernel module for the GFS Network Block Device• lvm2-cluster — Cl

Appendix B. Selectively Installing Red Hat Cluster Suite Packages 1492. Run up2date --installall --channel Label for Red Hat Cluster Suite. Thefollowi

150 Appendix B. Selectively Installing Red Hat Cluster Suite Packages• Table B-3 — For Red Hat GFSThe tables contain the following information to assi

Appendix B. Selectively Installing Red Hat Cluster Suite Packages 151RPMs Inclusion DependsonKernelType?Purposeccs-ver-rel.arch Req No The ClusterConfi

152 Appendix B. Selectively Installing Red Hat Cluster Suite PackagesRPMs Inclusion DependsonKernelType?Purposergmanager-ver-rel.arch Opt No Open sour

Appendix B. Selectively Installing Red Hat Cluster Suite Packages 153RPMs Inclusion DependsonKernelType?Purposeccs-ver-rel.arch Req No The ClusterConfi

Chapter 1.Red Hat Cluster Manager OverviewRed Hat Cluster Manager allows administrators to connect separate systems (called mem-bers or nodes) togethe

154 Appendix B. Selectively Installing Red Hat Cluster Suite PackagesRPMs Inclusion DependsonKernelType?Purposemagma-devel-ver-rel.arch Dev No A clust

Appendix B. Selectively Installing Red Hat Cluster Suite Packages 155B.1.2.2. Installing Packages with the rpm UtilityYou can use the rpm utility to i

156 Appendix B. Selectively Installing Red Hat Cluster Suite PackagesNoteIf your local computer is running a version of Red Hat Enterprise Linux thati

Appendix C.Multipath-usage.txt File for Red HatEnterprise Linux 4 Update 3This appendix contains the Multipath-usage.txt file. The file is included with

158Appendix C. Multipath-usage.txt File for Red Hat Enterprise Linux 4Update 3DM-MP works with a variety of storage arrays. Itauto-configures the foll

Appendix C. Multipath-usage.txt File for Red Hat Enterprise Linux 4Update 3 159Path States:ready - Path is able to handle I/O requests.shaky - Path is

160Appendix C. Multipath-usage.txt File for Red Hat Enterprise Linux 4Update 3priority path group. Other options for multipathd are to (a) waitfor a u

Appendix C. Multipath-usage.txt File for Red Hat Enterprise Linux 4Update 3 161For some conditions, that may not be sufficient. If DM-MP ismultipathin

162Appendix C. Multipath-usage.txt File for Red Hat Enterprise Linux 4Update 3"devnode_blacklist", and "devices" sections of theco

Appendix C. Multipath-usage.txt File for Red Hat Enterprise Linux 4Update 3 163DM-MP cannot be run on either the root or boot device.Other Sources of

2 Chapter 1. Red Hat Cluster Manager OverviewIn addition, you can cleanly stop the cluster services running on a cluster system and thenrestart them o

164Appendix C. Multipath-usage.txt File for Red Hat Enterprise Linux 4Update 3

IndexSymbols/etc/hostsediting, 23/etc/sysconfig/ha/lvs.cf file, 96Aactivating your subscription, viactive router(see LVS clustering)Apache HTTP Serverht

166Beowulf, 83definition of, 83high-availability clustering, 83(see also Red Hat Cluster Manager)definition of, 83load-balance clustering, 83(see also L

167IinstallationRed Hat Enterprise Linux, 22installing basic cluster hardware, 19installing the basic cluster hardware, 19introduction, ihow to use th

168Nnanny daemon, 96NATenabling, 106routing methods, LVS, 91network address translation(see NAT)network hardware table, 16network hub, 13network switc

169Sscheduling, job (LVS), 89SCSI bus length, 144SCSI bus termination, 144SCSI configuration requirements, 143SCSI identification numbers, 145SCSI stora

ColophonThe manuals are written in DocBook SGML v4.1 format. The HTML and PDF formats areproduced using custom DSSSL stylesheets and custom jade wrapp

172Runa Bhattacharjee — Bengali translationsChester Cheng — Traditional Chinese translationsVerena Fuehrer — German translationsKiyoto Hashida — Japan

Chapter 1. Red Hat Cluster Manager Overview 3network-accessible database cluster service is usually assigned an IP address, whichis failed over along

Red Hat Cluster Suite: Configuring and Managing a ClusterCopyright © 2000-2006 Red Hat, Inc.Mission Critical Linux, Inc.K.M. SorensonRed Hat, Inc.1801

4 Chapter 1. Red Hat Cluster Manager Overviewmaintain application availability and data integrity. For example, if a node completelyfails, a healthy n

Chapter 1. Red Hat Cluster Manager Overview 5SoftwareSubsystemComponents DescriptionClusterConfiguration Toolsystem-config-cluster Command used to mana

6 Chapter 1. Red Hat Cluster Manager OverviewSoftwareSubsystemComponents Descriptionfence_bullpap Fence agent for Bull NovascalePlatform Administratio

Chapter 1. Red Hat Cluster Manager Overview 7SoftwareSubsystemComponents Descriptionfence_wti Fence agent for WTI power switch.fenced The fence daemon

8 Chapter 1. Red Hat Cluster Manager Overview

Chapter 2.Hardware Installation and OperatingSystem ConfigurationTo set up the hardware configuration and install Red Hat Enterprise Linux, follow these

10 Chapter 2. Hardware Installation and Operating System ConfigurationPerformance requirements of applications and usersChoose a hardware configuration

Chapter 2. Hardware Installation and Operating System Configuration 11WarningThe minimum cluster configuration is not a supported solution and should no

12 Chapter 2. Hardware Installation and Operating System ConfigurationTable 2-2. Improving Availability and Data IntegrityFigure 2-1 illustrates a hard

Chapter 2. Hardware Installation and Operating System Configuration 13• Network power switches to enable each node to power-cycle the other nodes durin

Table of ContentsIntroduction...

14 Chapter 2. Hardware Installation and Operating System Configurationswitch or network hub, which enables the connection of the nodes to a network. A

Chapter 2. Hardware Installation and Operating System Configuration 15Hardware Quantity Description RequiredClusternodes16(maximumsupported)Each node m

16 Chapter 2. Hardware Installation and Operating System Configurationtables.Hardware Quantity Description RequiredNetworkinterfaceOne for eachnetworkc

Chapter 2. Hardware Installation and Operating System Configuration 17Hardware Quantity Description RequiredExternaldisk storageenclosureAt least one U

18 Chapter 2. Hardware Installation and Operating System ConfigurationHardware Quantity Description RequiredFibreChannelcableAs requiredby hardwareconfi

Chapter 2. Hardware Installation and Operating System Configuration 19connect the nodes to the optional console switch and network switch or hub. Follo

20 Chapter 2. Hardware Installation and Operating System ConfigurationCluster Hardware Component SerialPortsEthernetPortsPCISlotsPoint-to-point Etherne

Chapter 2. Hardware Installation and Operating System Configuration 21cluster nodes (for example, boot and system partitions, and other file systems tha

22 Chapter 2. Hardware Installation and Operating System Configuration2.3.4. Setting Up a Network Switch or HubA network switch or hub, although not re

Chapter 2. Hardware Installation and Operating System Configuration 233. When using a terminal server, configure Red Hat Enterprise Linux to send consol

5.2. Configuring Shared Storage ...775.3. Installing and Configuring the Apache HTTP Server

24 Chapter 2. Hardware Installation and Operating System ConfigurationThe following is an example of an /etc/hosts file on a node of a cluster that does

Chapter 2. Hardware Installation and Operating System Configuration 252.4.2. Decreasing the Kernel Boot Timeout LimitIt is possible to reduce the boot

26 Chapter 2. Hardware Installation and Operating System ConfigurationMay 22 14:02:11 storage3 kernel: Vendor: SEAGATE Model: ST318203LC Rev: 0001May 2

Chapter 2. Hardware Installation and Operating System Configuration 277 vcs10 misc13 input14 sound29 fb89 i2c116 alsa128 ptm136 pts171 ieee1394180 usb2

28 Chapter 2. Hardware Installation and Operating System Configuration2.5. Setting Up and Connecting the Cluster HardwareAfter installing Red Hat Enter

Chapter 2. Hardware Installation and Operating System Configuration 296. Set up the bonded Ethernet channels, if applicable. Refer toSection 2.5.1 Confi

30 Chapter 2. Hardware Installation and Operating System ConfigurationNETMASK=255.255.255.0GATEWAY=192.168.1.1IPADDR=192.168.1.104. Reboot the system f

Chapter 2. Hardware Installation and Operating System Configuration 312.5.3. Configuring UPS SystemsUninterruptible power supplies (UPS) provide a highl

32 Chapter 2. Hardware Installation and Operating System ConfigurationFigure 2-3. Single UPS System ConfigurationMany vendor-supplied UPS systems includ

Chapter 2. Hardware Installation and Operating System Configuration 33beginning of the given range. The following example shows how to create two parti

Index...165Colophon...

34 Chapter 2. Hardware Installation and Operating System Configuration6 998.872 2001.952 logical• A partition may be removed using parted’s rm command.

Chapter 3.Installing and Configuring Red Hat ClusterSuite SoftwareThis chapter describes how to install and configure Red Hat Cluster Suite software and

36 Chapter 3. Installing and Configuring Red Hat Cluster Suite Software5. Creating cluster members. Refer to Section 3.7 Adding and Deleting Members.6.

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 37Figure 3-1. Cluster Configuration ToolThe Cluster Configuration Tool uses a hierar

38 Chapter 3. Installing and Configuring Red Hat Cluster Suite Software• Managed Resources — Defines failover domains, resources, and services.• Failove

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 39Figure 3-2. Cluster Configuration Structure3.3. Installing the Red Hat Cluster Su

40 Chapter 3. Installing and Configuring Red Hat Cluster Suite SoftwareTo automatically install RPMs, follow these steps at each node:1. Log on as the

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 41Figure 3-3. Starting a New Configuration FileNoteThe Cluster Management tab for t

42 Chapter 3. Installing and Configuring Red Hat Cluster Suite Software2. Starting the Cluster Configuration Tool displays a graphical representationof

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 433. At the Name text box, specify a name for the cluster. The name should be desc

44 Chapter 3. Installing and Configuring Red Hat Cluster Suite SoftwareTo configure fence devices, follow these steps:1. Click Fence Devices. At the bot

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 45Field DescriptionName A name for the Brocade device connected to the cluster.IP

46 Chapter 3. Installing and Configuring Red Hat Cluster Suite SoftwareField DescriptionName A name for the GNBD device used to fence the cluster. Note

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 47Field DescriptionIP Address The IP address assigned to the IPMI port.Login The l

48 Chapter 3. Installing and Configuring Red Hat Cluster Suite SoftwareField DescriptionName A name for the SANBox2 device connected to the cluster.IP

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 493.7.1. Adding a Member to a ClusterTo add a member to a new cluster, follow thes

50 Chapter 3. Installing and Configuring Red Hat Cluster Suite SoftwareNoteThe node on which you are running the Cluster Configuration Tool must be expl

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 518. Choose File => Save to save the changes to the cluster configuration.3.7.2.

52 Chapter 3. Installing and Configuring Red Hat Cluster Suite Software6. Start cluster software on all cluster nodes (including the added one) by runn

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 535. Start the Red Hat Cluster Suite management GUI. At the Cluster ConfigurationTo

IntroductionThe Red Hat Cluster Suite is a collection of technologies working together to providedata integrity and the ability to maintain applicatio

54 Chapter 3. Installing and Configuring Red Hat Cluster Suite Softwared. At that dialog box, click Yes to confirm deletion.e. Propagate the updated con

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 55• Unrestricted — Allows you to specify that a subset of members are preferred, b

56 Chapter 3. Installing and Configuring Red Hat Cluster Suite Software2. At the bottom of the right frame (labeled Properties), click the Create a Fai

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 57Figure 3-11. Failover Domain Configuration: Adjusting Priorityb. For each node th

58 Chapter 3. Installing and Configuring Red Hat Cluster Suite Software3.8.2. Removing a Failover DomainTo remove a failover domain, follow these steps

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 595. At the Cluster Configuration Tool, perform one of the following actions depend

60 Chapter 3. Installing and Configuring Red Hat Cluster Suite SoftwareFile System Type — Choose the file system for the resource using the drop-down me

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 61NFS ClientName — Enter a name for the NFS client resource.Target — Enter a targe

62 Chapter 3. Installing and Configuring Red Hat Cluster Suite Software3.10. Adding a Cluster Service to the ClusterTo add a cluster service to the clu

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 636. Run Exclusive checkbox — This sets a policy wherein the service only runs onn

ii Introduction• Chapter 2 Hardware Installation and Operating System Configuration• Chapter 3 Installing and Configuring Red Hat Cluster Suite Software

64 Chapter 3. Installing and Configuring Red Hat Cluster Suite SoftwareNoteTo verify the existence of the IP service resource used in a cluster service

Chapter 3. Installing and Configuring Red Hat Cluster Suite Software 651. service ccsd start2. service lock_gulmd start or service cman start according

66 Chapter 3. Installing and Configuring Red Hat Cluster Suite Software

Chapter 4.Cluster AdministrationThis chapter describes the various administrative tasks for maintaining a cluster after it hasbeen installed and config

68 Chapter 4. Cluster AdministrationFigure 4-1. Cluster Status Tool4.2. Displaying Cluster and Service StatusMonitoring cluster and application servic

Chapter 4. Cluster Administration 69Cluster and service status includes the following information:• Cluster member system status• Service status and w

70 Chapter 4. Cluster AdministrationService Status DescriptionStarted The service resources are configured and available on the clustersystem that owns

Chapter 4. Cluster Administration 71To monitor the cluster and display status at specific time intervals from a shell prompt,invoke clustat with the -i

72 Chapter 4. Cluster AdministrationWarningDo not manually edit the contents of the /etc/cluster/cluster.conf file without guid-ance from an authorized

Chapter 4. Cluster Administration 734.5. Backing Up and Restoring the Cluster DatabaseThe Cluster Configuration Tool automatically retains backup copie

Introduction iiiThe .bashrc file in your home directory contains bash shell definitions and aliasesfor your own use.The /etc/fstab file contains informat

74 Chapter 4. Cluster AdministrationNoteThe Cluster Configuration Tool does not display the Send to Clusterbutton if the cluster is new and has not bee

Chapter 4. Cluster Administration 75chkconfig --level 2345 fenced offchkconfig --level 2345 lock_gulmd offchkconfig --level 2345 cman offchkconfig --l

76 Chapter 4. Cluster Administration

Chapter 5.Setting Up Apache HTTP ServerThis chapter contains instructions for configuring Red Hat Enterprise Linux to make theApache HTTP Server highly

78 Chapter 5. Setting Up Apache HTTP Server5.2. Configuring Shared StorageTo set up the shared file system resource, perform the following tasks as root

Chapter 5. Setting Up Apache HTTP Server 79• Specify a unique IP address to which the service will listen for requests. For ex-ample:Listen 192.168.1.

80 Chapter 5. Setting Up Apache HTTP Server2. Add a device for the Apache HTTP Server content files and/or custom scripts.• Click Create a Resource.• I

II. Configuring a Linux Virtual Server ClusterBuilding a Linux Virtual Server (LVS) system offers highly-available and scalable solutionfor production

Chapter 6.Introduction to Linux Virtual ServerUsing Red Hat Enterprise Linux, it is possible to create highly available server clusteringsolutions abl