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Oracle® Enterprise Manager Cloud Control Advanced Installation and Configuration Guide
12c Release 2 (12.1.0.2)
E24089-21
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16 Deinstalling Oracle Management Agent

This chapter describes how you can deinstall Oracle Management Agent (Management Agent). In particular, this chapter covers the following:


Note:

On a cluster, ensure that you deinstall the Management Agents from all the nodes one by one. To do so, follow the instructions outlined in this chapter.

Prerequisites

Before you deinstall a Management Agent, do the following:

  1. Shut down the Management Agent by running the following command from its home. If it is already shut down, then skip this step.

    $<AGENT_HOME>/bin/emctl stop agent

  2. Wait for the Management Agent to go to the unreachable state in the Cloud Control console. If it is already in the unreachable state, then go to the next step.

  3. Delete the Management Agent targets and their monitored targets (from any host where EM CLI is installed):

    emcli delete_target

    -name="example.com:1836"

    -type="oracle_emd"

    -delete_monitored_targets


    Note:

    For information on EM CLI and instructions to set it up, see Oracle Enterprise Manager Command Line Interface Guide.

Deinstallation Procedure

This section describes the following:

Deinstalling Oracle Management Agent in Graphical Mode

To deinstall a Management Agent in graphical mode, follow these steps:


Note:

Deinstall the components in the order described in this procedure. Otherwise, the installation wizard displays an error.

  1. Invoke the installer from the Management Agent home by running the following command:

    $<AGENT_HOME>/oui/bin/runInstaller -deinstall ORACLE_HOME=<absolute_path_to_agent_home> [-removeallfiles] [-invPtrLoc <absolute_path_to_oraInst.loc>]


    Note:

    • You can invoke the installer even from the directory where you downloaded the software. For example, <software_location>/.

    • When you run runInstaller -help, you will see the option -nowarningonremovefiles listed. This option is currently not supported and has no effect even if you use it.

    • The -invPtrLoc parameter is supported only on UNIX platforms, and not on Microsoft Windows platforms.

    • For Microsoft Windows, invoke the setup.exe file.



    Note:

    When you invoke runInstaller or setup.exe, if the Enterprise Manager Cloud Control Installation Wizard does not appear, then it is possible that you do not access to the /stage directory.

    There is a classpath variable that the installation wizard computes for OPatch as ../stage/Components/, and when the TEMP variable is set to /tmp, the installation wizard tries to look for the opatch JAR file in the /tmp/../stage directory, which is equivalent to /stage. However, if you do not have the permission on /stage, then the installation wizard can hang. Under such circumstances, verify if you have access to the /stage directory. If you do not have access to it, then set the TEMP variable to a location where the install user has access to, and then relaunch the installation wizard.


  2. In the installation wizard, click Installed Products.

  3. On the Inventory screen, select the plug-in homes, and click Remove.

  4. On the Inventory screen, select the sbin home, and click Remove.

  5. On the Inventory screen, select the Management Agent, and click Remove.

  6. Manually delete the agent base directory. For information on installation base directory, see What Is Agent Base Directory?.

    For UNIX platforms:

    rm -rf <absolute_path_to_agent_base_dir>

    For Microsoft Windows platforms:

    del <absolute_path_to_agent_base_dir>

Deinstalling Oracle Management Agent in Silent Mode

This section describes the following methods to deinstall the Management Agent in silent mode:

Deinstaling in Slient Mode Using the Installer

To deinstall a Management Agent in silent mode using the installer, follow these steps:


Note:

Deinstall the components in the order described in this procedure. Otherwise, the installation wizard displays an error.

  1. Deinstall the plug-in homes:

    $<AGENT_HOME>/oui/bin/runInstaller -deinstall -silent "REMOVE_HOMES={absolute_path_to_plug-in_home}" ORACLE_HOME=<absolute_path_to_agent_home> [-removeallfiles] [-invPtrLoc <absolute_path_to_oraInst.loc>]


    Note:

    • When you run runInstaller -help, you will see the option -nowarningonremovefiles listed. This option is currently not supported and has no effect even if you use it.

    • On Microsoft Windows, invoke the setup.exe file.

    • The -invPtrLoc parameter is supported only on UNIX platforms, and not on Microsoft Windows platforms.

    • To deinstall multiple plug-ins, enter the plug-in homes separated by a comma.


    For example,

    $<AGENT_HOME>/oui/bin/runInstaller -deinstall -silent "REMOVE_HOMES={/home/oracle/agent/plugins/oracle.sysman.emas.oms.plugin_12.1.0.2.0,/home/oracle/agent/plugins/oracle.sysman.emct.oms.plugin_12.1.0.2.0}" ORACLE_HOME=/home/oracle/middleware/agent/core/12.1.0.2.0 -removeAllFiles -invPtrLoc $<AGENT_HOME>/oraInst.loc

  2. Deinstall the sbin home:

    $<AGENT_HOME>/oui/bin/runInstaller -deinstall -silent "REMOVE_HOMES={absolute_path_to_sbin_directory}" ORACLE_HOME=<absolute_path_to_agent_home> [-removeAllFiles] [-invPtrLoc <absolute_path_to_oraInst.loc>]

    For example,

    $<AGENT_HOME>/oui/bin/runInstaller -deinstall -silent "REMOVE_HOMES={/home/oracle/agent/sbin}" ORACLE_HOME=/home/oracle/middleware/agent/core/12.1.0.2.0 -removeAllFiles -invPtrLoc $<AGENT_HOME>/oraInst.loc

  3. Deinstall the Management Agent:

    $<AGENT_HOME>/oui/bin/runInstaller -deinstall -silent "REMOVE_HOMES={absolute_path_to_agent_oracle_home}" ORACLE_HOME=<absolute_path_to_agent_home> -removeAllFiles -invPtrLoc <absolute_path_to_oraInst.loc>

    For example,

    $<AGENT_HOME>/oui/bin/runInstaller -deinstall -silent "REMOVE_HOMES={/home/oracle/agent/core/12.1.0.2.0}" ORACLE_HOME=/home/oracle/middleware/agent/core/12.1.0.2.0 -removeAllFiles -invPtrLoc $<AGENT_HOME>/oraInst.loc

  4. Manually delete the agent base directory. For information on agent base directory, see What Is Agent Base Directory?.

    For UNIX platforms:

    rm -rf <absolute_path_to_install_base_dir>

    For Microsoft Windows platforms:

    del <absolute_path_to_install_base_dir>

Deinstalling in Silent Mode Using AgentDeinstall.pl Script

To deinstall a Management Agent in silent mode using the AgentDeinstall.pl script, follow these steps:


WARNING:

By default, the AgentDeinstall.pl script deinstalls the Management Agent, removes the dependent entries from the inventory, and removes the entire agent base directory. If you want to retain the agent base directory for some reason, then pass the -skipRemoval argument to the script. This argument ensures that only the Management Agent home from agent base directory is removed, but the agent base directory and the rest of the subdirectories are retained.


  1. Invoke the AgentDeinstall.pl script:

    $<AGENT_HOME>/perl/bin/perl <AGENT_HOME>/sysman/install/AgentDeinstall.pl -agentHome <AGENT_HOME>

    For example, if you want to deinstall the Management Agent and also remove the agent base directory, then run the following command:

    $/u01/app/Oracle/core/12.1.0.2.0/perl/bin/perl /u01/app/Oracle/core/12.1.0.2.0/sysman/install/AgentDeinstall.pl -agentHome /u01/app/Oracle/core/12.1.0.2.0/

    For example, if you want to deinstall the Management Agent but NOT remove the agent base directory, then run the following command:

    $/u01/app/Oracle/core/12.1.0.2.0/perl/bin/perl /u01/app/Oracle/core/12.1.0.2.0/sysman/install/AgentDeinstall.pl -agentHome /u01/app/Oracle/core/12.1.0.2.0/ -skpRemoval

  2. Manually remove the targets, which were being monitored by the Management Agent you deinstalled, from the Enterprise Manager Cloud Control console.

  3. Manually delete the agent base directory. For information on agent base directory, see What Is Agent Base Directory?.

    For UNIX platforms:

    rm -rf <absolute_path_to_install_base_dir>

    For Microsoft Windows platforms:

    del <absolute_path_to_install_base_dir>

Deinstalling Shared Agent

To deinstall a Shared Agent, run the following command from the Master Agent home that is visible on the host where your Shared Agent is installed:

$<AGENT_HOME>/perl/bin/perl <AGENT_HOME>/sysman/install/NFSAgentDeInstall.pl AGENT_INSTANCE_HOME=<absolute_path_to_agent_instance_home> ORACLE_HOME=<absolute_path_to_agent_home>

For example,

/home/john/software/oracle/agent/core/12.1.0.2.0/perl/bin/perl /home/john/software/oracle/agent/core/12.1.0.2.0/sysman/install/NFSAgentDeInstall.pl AGENT_INSTANCE_HOME=/home/john/software/oracle/agent/agent_inst ORACLE_HOME=/home/john/software/oracle/agent/core/12.1.0.2.0


Note:

If you encounter an error while deinstalling the Shared Agent, then refer to Troubleshooting Deinstallation Failures.

Deinstalling Oracle Management Agent Installed Using an RPM File

To deinstall a Management Agent that was installed using a .rpm file, run the following command as a root user:

rpm -e <rpm_name>


Note:

As a prerequisite, ensure that you have Resource Package Manager (RPM) installed on the host.

After You Deinstall

After you deinstall the Management Agent, follow these steps:

  1. (Only for Graphical Mode) Verify whether the Oracle homes and other directories were successfully deinstalled. To do so, follow these steps:

    1. Invoke the installation wizard by running the following command from the Management Agent home:

      <DVD>/runInstaller


      Note:

      On Microsoft Windows, invoke the setup.exe file.

    2. In the installation wizard, on the My Oracle Support Details screen, click Installed Products.

    3. On the Inventory screen, check whether or not the Oracle homes and other directories you deinstalled appear. If the deinstallation was successful, then those Oracle homes and directories should not appear.

  2. The Oracle homes you deinstalled are deregistered from the central inventory. However, some files might still remain in these Oracle homes. If they do, you can manually delete them.

    You must also manually delete the auto-startup script called gcstartup which will be present under /etc/init.d directory.


    Note:

    These auto-start scripts are not available on Microsoft Windows.

  3. If you deinstalled on a Microsoft Windows platform, then follow these steps. Ensure that you are logged in as a user with Administrator privileges on that host.

    Remove Entries from Microsoft Windows Registry

    1. Start the registry editor by selecting Start and then Run. Type regedit and click OK.

    2. In the Registry Editor window, in the left pane, expand HKEY_LOCAL_MACHINE, SOFTWARE, and then Oracle. Under the Oracle directory, delete the following:

      (a) KEY_agent12gn

      (b) KEY_sbin12gn


      Note:

      Here, n refers to a numeral indicating the agent instance. For example, KEY_sbin12g9 for the first agent installation.

    3. Expand HKEY_LOCAL_MACHINE, SOFTWARE, Oracle, and then Sysman. Under the Sysman directory, delete the Management Agent service. For example, Oracleagent12g9Agent.

    4. Expand HKEY_LOCAL_MACHINE, SYSTEM, CurrentControlSet, and then Services. Under the Services directory, delete the Management Agent keys.

    5. Expand HKEY_LOCAL_MACHINE, SYSTEM, ControlSet002, and then Services. Under the Services directory, delete the Management Agent service.

    6. Close the registry editor.

    Clean Up Environment Settings

    1. Open the Environment Variables window.

      On Microsoft Windows NT, select Start, Settings, Control Panel, System, and then Environment.

      On Microsoft Windows XP or 2000, select select Start, Settings, Control Panel, System, Advanced, and then Environment Variables.

    2. In the System Variables section, click the variable PATH and modify the value.

    3. Delete Management Agent home.

    4. Click Apply and then click OK.

    5. Close the Control Panel window.

    6. Restart the host.