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Oracle® Database Deinstallation Tool for Oracle Clusterware and Oracle Real Application Clusters
10g Release 2 (10.2) for UNIX and Microsoft Windows B31071-01 |
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Deinstallation Tool for Oracle Clusterware and Oracle Real Application Clusters
10g Release 2 (10.2) for UNIX and Microsoft Windows
B31071-01
May 2006
Use the information in this document to run the Oracle Clusterware and Oracle Real Application Clusters deinstallation tool. This document contains the following topics:
The clusterdeconfig tool removes and deconfigures all of the software and shared files that are associated with an Oracle Clusterware or Oracle RAC Database installation. The clusterdeconfig tool removes the software and shared files from all of the nodes in a cluster.
Use the clusterdeconfig tool to prepare a cluster to reinstall Oracle Clusterware and Oracle Database software after a successful or failed installation. The tool removes software, clusterware and database files, and the global configuration across all of the nodes in a cluster environment that could hinder a subsequent installation. On Windows-based systems, the tool removes Windows Registry entries. The clusterdeconfig tool also removes Oracle Clusterware that was installed to support Oracle RAC or to provide failover capabilities for third-party software.
The clusterdeconfig tool restores your cluster to its state prior to the installation, enabling you to perform a new installation. You can also use Oracle Cluster Verification Utility (CVU) to determine the cause of any problems that may have occurred during an installation so that you can correct the errors.
The clusterdeconfig tool will not remove third-party software that depends on Oracle Clusterware. In addition, the clusterdeconfig tool does not warn you about third-party software dependencies on Oracle Clusterware or Oracle Database homes prior to removing the respective homes.
The following sections explain how to use the clusterdeconfig tool to remove Oracle Clusterware and Oracle RAC databases from your environment. This includes any processes or services, software, files, and system settings that were created or altered as part of an installation:
Use the clusterdeconfig tool to remove installed components in the following situations:
You have encountered errors during or after installing Oracle Database software on a cluster and you want to re-attempt an installation.
Your installation stopped because of a hardware or operating system failure.
You have stopped an installation and do not know how to restart it. In such cases, use the clusterdeconfig tool to remove the partially installed product and restart your installation.
You have researched all of the problems with your existing installation using CVU or by examining the installation log files and cannot determine the cause of a problem.
You can also use clusterdeconfig after you have successfully installed Oracle Database software to remove the database software from all of the nodes. You might do this, for example, in an educational environment in which students practice installing Oracle Database software.
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Note: The clusterdeconfig tool can only remove Oracle Database components from cluster nodes that are active. If you run the clusterdeconfig tool and one or more of your cluster nodes are inactive, then you must re-run the tool when those nodes are active to complete the deconfiguration of your cluster.For instructions about how to add and delete individual nodes, refer to the chapters about adding and deleting nodes in the Oracle Database Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment Guide. |
Depending on the software that you want to deinstall, plan your deinstallation so that the components are deinstalled in the correct order. In other words, because of dependencies among the Oracle Clusterware and the Oracle Database software components, you must deinstall the components in a specific order as follows:
Deinstall all Oracle Database homes that do not include ASM software.
Deinstall the Oracle Database home that includes ASM software, if you have one.
Deinstall the Oracle Clusterware home.
You can optionally deinstall third-party software that depended on the Oracle Clusterware.
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Note: If you attempt to run the clusterdeconfig tool to deinstall Oracle Clusterware without first removing the related Oracle Database homes, then the clusterdeconfig tool reports an error instead of a warning. The tool performs the deinstallation only after your confirmation. In addition, the clusterdeconfig tool does not detect third-party software that uses Oracle Clusterware and will not warn you if third-party software exists on the cluster. |
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Note: The clusterdeconfig tool does not remove LDAP entries. |
Complete these steps before you start the deinstallation:
On UNIX-based systems, connect as the oracle user who performed the installation of the Oracle Clusterware and Oracle Database home that you are deinstalling. On Windows-based systems, connect as a user who is a member of the Administrator group.
Confirm that the connected user has equivalence on all of the nodes in the cluster. Your platform-specific installation guide explains how to configure user equivalence.
To begin the deinstallation tool, connect to one of the nodes in your cluster that contains the installation that you want to remove. You can connect to the node directly or you can connect from a client. Open a command line interface and enter the following command:
clusterdeconfig
The output from this command displays the required and optional parameters. You can also use the -help or -h option to obtain more information about the clusterdeconfig tool commands and their use.
Examine the log file to see the results of the clusterdeconfig tool processing. The log file is on the cluster node on which you ran the tool in the clusterdeconfig_path/logs directory on UNIX-based systems and in clusterdeconfig_path\logs on Windows-based systems.
If any nodes were inactive at the time that you ran the clusterdeconfig tool, then you will need to re-run the tool when these nodes are active. Until you do this, you will not have completely removed the Oracle Clusterware and Oracle RAC software. Further attempts to reinstall the software could fail.
You can run Cluster Verification Utility (CVU) from your installation media or by downloading CVU to determine what may have caused errors during a previous Oracle Clusterware or Oracle Database installation. You can also run CVU on a cluster that you have already deconfigured with the clusterdeconfig tool to prepare for another Oracle Database software installation.
To run CVU from the installation media, perform the following steps:
On UNIX-based systems:
Identify the mount point for the Oracle Clusterware installation media. In the following examples, the mount point is /dev/dvdrom.
Identify the nodes that CVU should check for cluster readiness. In the following examples, the cluster nodes are node1, node2, and node3.
For a summary report, run the following command:
/dev/dvdrom/crs/Disk1/cluvfy/runcluvfy.sh stage -pre crsinst -n node1,node2,node3
For a detailed report, run the following command with the verbose option:
/dev/dvdrom/crs/Disk1/cluvfy/runcluvfy.sh stage -pre crsinst -n node1,node2,node3 -verbose
On Windows-based systems:
Identify the mount point for the Oracle Clusterware installation media. In the following examples, the mount point is the stage directory on your C: drive.
Identify the nodes that CVU should check for cluster readiness. In the following examples, the cluster nodes are node1, node2, and node3.
For a summary report, run the following command:
C:\> stage\clusterware\cluvfy\runcluvfy.bat stage -pre crsinst -n node1,node2,node3
For a detailed report, run the following command with the verbose option:
C:\> stage\clusterware\cluvfy\runcluvfy.bat stage -pre crsinst -n node1,node2,node3 -verbose
To run CVU from an installed version of the utility, run the following command at an operating system prompt, where option_list contains one or more options as described in Appendix A, "Troubleshooting," of the Oracle Database Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment Guide:
cluvfy option_list
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Deinstallation Tool for Oracle Clusterware and Oracle Real Application Clusters, 10g Release 2 (10.2) for UNIX and Microsoft Windows
B31071-01
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