VERITAS Cluster Server (VCS) for database

 

Managing a VERITAS Cluster Server (VCS) for a database involves specific commands to start, stop, and manage the cluster. Below are the steps and commands to start and shut down a VERITAS cluster for a database environment.

Starting the VERITAS Cluster

1. Start the VCS Services:
   Ensure the VCS services are running on all nodes in the cluster.

hastart

This command starts the VCS services on the local node.

Bring the Cluster Online:
If the cluster is not already online, bring it online using:

hagrp -online <group_name> -sys <system_name>

Replace <group_name> with the name of the resource group and <system_name> with the name of the system where the group should be brought online.

Verify the Cluster Status:
Check the status of the cluster to ensure all resources are online:

hastatus -summary

1. This command provides a summary of the cluster's status, including resource groups and their states.
2. Start the Database Resource:
   If the database is managed as a resource in VCS, ensure it is started:

hares -online <database_resource_name> -sys <system_name>

Replace <database_resource_name> with the name of the database resource.

Shutting Down the VERITAS Cluster

1. Stop the Database Resource:
   Gracefully stop the database resource:

hares -offline <database_resource_name> -sys <system_name>

 

1. Replace <database_resource_name> with the name of the database resource.
2. Bring the Resource Group Offline:
   Take the resource group offline:

hagrp -offline <group_name> -sys <system_name>

Replace <group_name> with the name of the resource group.

Stop the VCS Services:
Stop the VCS services on all nodes:

hastop -all

1. This command stops the VCS services on all nodes in the cluster.
2. Verify the Cluster is Shutdown:
   Confirm that the cluster is fully stopped:

hastatus

1. This command should indicate that the VCS services are not running.

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Additional Commands for VCS Management

• Check Cluster Configuration:

hacf -verify

• This command verifies the cluster configuration file for errors.
• List Resource Groups:

hagrp -list

• Lists all resource groups in the cluster.
• Check Resource Status:

hares -state

·       Displays the state of all resources.

·       Move a Resource Group to Another Node:

hagrp -switch <group_name> -to <system_name>

Moves a resource group to another system in the cluster.