VERITAS Cluster Server3.5 for SolarisLesson 3Managing Cluster Services

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Overview

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ObjectivesAfter completing this lesson, you will be able to:Describe the cluster configuration mechanismsStart the VCS engine on cluster systems.Stop the VCS engine.Modify the cluster configuration.Describe cluster transition states.

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Cluster Configuration

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Starting VCSmain.cfCluster ConfPrivate NetworkSystem2System3

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Starting VCS: Second Systemmain.cfhadhashadowPrivate NetworkhadhashadowSystem2System3Cluster ConfCluster Conf

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Starting VCS: Third Systemmain.cfhadhashadowhadhashadowmain.cfmain.cfhadhashadowSystem1System2System3Shared Cluster Configuration in MemoryPrivate Network

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Stopping VCS

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The hastop CommandThe hastop command stops the VCS engine.Syntax:hastop option [arg] [-option]Options:-local [-force | -evacuate]-sys sys_name [-force | -evacuate]-all [-force]Example:hastop -sys train4 -evacuate

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Displaying Cluster StatusThe hastatus Command Displays status of items in the cluster.Syntax:hastatus -option [arg] [-option arg]Options:-group service_group -sum[mary]Example:hastatus -group OracleSG

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Protecting the Cluster ConfigurationCluster configuration opened; .stale file createdResources added to cluster configuration in memory; main.cf out of sync with memory configurationChanges saved to disk; .stale removed

haconf -makerwCluster Confhares add haconf dump -makeromain.cfmain.cf.stale

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Opening and Saving the Cluster ConfigurationThe haconf command opens, closes, and saves the cluster configuration.Syntax: haconf option [-option] Options:-makerwOpens configuration-dump Saves configuration-dump makero Saves and closes configurationExample: haconf -dump -makero

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Starting VCS with a Stale Configurationmain.cfhadhashadowPrivate NetworkhastarthadhashadowSystem2System3main.cf.stalemain.cf

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Forcing VCS to Start on the Local SystemSystem1main.cfPrivate Networkhastart -forcehadhashadowSystem2System3main.cf.staleCluster Confmain.cf

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Forcing a System to Start

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The hasys CommandAlters or queries state of hadSyntax:hasys option [arg]Options:-force system_name-list-display system_name-delete system_name-add system_nameExample: hasys -force train11

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Propagating a Specific ConfigurationStop VCS on all systems in the cluster and leave applications running:hastop -all forceStart VCS stale on all other systems:hastart staleThe -stale option causes these systems to wait until a running configuration is available from which they can build.Start VCS on the system with the main.cf that you are propagating:hastart

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Summary of Start OptionsThe hastart command starts the had and hashadow daemons.Syntax:hastart [-option]Options:-stale-forceExample:hastart -force

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Validating the Cluster ConfigurationThe hacf utility checks the syntax of the main.cf file.Syntax:hacf -verify config_directoryExample:hacf -verify /etc/VRTSvcs/conf/config

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Modifying Cluster AttributesThe haclus command is used to view and changecluster attributes.Syntax:haclus option [arg]Options:-display-help [-modify]-modify modify_options-value attribute-notesExample: haclus value ClusterLocation

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Startup States and Transitions

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Shutdown States and TransitionsRUNNINGLEAVINGEXITINGEXITEDEXITING_FORCIBLYFAULTEDhastophastop -forceResources offlined,agents stoppedUnexpected exit

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SummaryYou should now be able to:Describe the cluster configuration mechanisms.Start VCS.Stop VCS.Modify the cluster configuration.Explain the transition states of the cluster.

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Lab 3: Managing Cluster ServicesTo complete this lab exercise:Use commands to start and stop cluster services, as described in the detailed lab instructions.Observe the cluster status by running hastatus in a terminal window.