Managing ICAgent in Host Scenarios

Installing ICAgent

During installation, select Intra-region hosts or Extra-region hosts based on the host location. For details, see Installing ICAgent (Intra-Region Hosts) and .

Upgrading ICAgent

Linux hosts support ICAgent upgrade on the LTS console, while Windows hosts do not.

1. Log in to the management console and choose Management & Deployment > Log Tank Service.
2. Choose Host Management > Hosts in the navigation pane.
3. Click the Intra-Region Hosts or Extra-Region Hosts tab. When the system prompts you that a new ICAgent version is available, select one or more hosts where ICAgent is to be upgraded, and click Upgrade ICAgent.
4. In the displayed dialog box, click OK.

   The ICAgent upgrade takes about 1 minute. When the ICAgent status changes from Updating to Running, the ICAgent upgrade has completed.

   If ICAgent is abnormal after the upgrade or if the upgrade fails, log in to the host and run the installation command to reinstall ICAgent. Uninstalling the original ICAgent is not required. For details, see Installing ICAgent (Intra-Region Hosts) and .

Uninstalling ICAgent

If ICAgent is uninstalled from a host, log collection will be affected. Exercise caution when performing this operation.

Uninstalling ICAgent does not delete the installation files. You need to delete them manually if necessary.

Uninstall ICAgent from a Linux environment using any of the following methods:

• Uninstalling ICAgent on the console: applicable to uninstall ICAgent that has been successfully installed.
  1. Choose Host Management > Hosts in the navigation pane.
  2. Select one or more hosts where ICAgent is to be uninstalled and click Uninstall ICAgent.
  3. In the displayed dialog box, click OK.

     The uninstallation begins. This process takes about a minute.

     After the uninstallation is complete, the ICAgent status of the host will be displayed as Uninstalled in the host list.

     To reinstall ICAgent, wait for 5 minutes after it is uninstalled. Otherwise, the ICAgent may be automatically uninstalled again.

• Logging in to the host to uninstall ICAgent: applicable to uninstall ICAgent that failed to be installed.
  1. Log in to a host where ICAgent is to be uninstalled as user root.
  2. Run the following command:

     bash /opt/oss/servicemgr/ICAgent/bin/manual/uninstall.sh

     If the message "ICAgent uninstall success" is displayed, the uninstallation has completed.

• Remotely uninstalling ICAgent: applicable to remotely uninstall ICAgent that has been successfully installed.

  You can uninstall ICAgent on one host remotely from another host. In remote uninstallation, the hosts must all belong to the same VPC and be on the same subnet.

  1. Run the following command on the host where ICAgent has been installed. x.x.x.x indicates the IP address of the host you want to uninstall ICAgent from.

     bash /opt/oss/servicemgr/ICAgent/bin/remoteUninstall/remote_uninstall.sh -ip x.x.x.x

  2. Enter the password for user root of the host when prompted.
     • If the Expect tool is installed on the host that has ICAgent installed, the ICAgent uninstallation should be able to complete without prompting you for a password. Otherwise, enter the password as prompted.
     • Ensure that user root can run SSH or SCP commands on the host where ICAgent has been installed to communicate with the remote host.
     • If the message "Uninstall ICAgent success" is displayed, the uninstallation has completed.
• Batch uninstalling ICAgent: applicable to uninstall ICAgent that has been successfully installed from a batch of hosts.

  If ICAgent has been installed on a host and the ICAgent installation package ICProbeAgent.tar.gz is in the /opt/ICAgent/ directory of the host, you can use this method to uninstall ICAgent from multiple hosts at once.

  

  The hosts must all belong to the same VPC and be on the same subnet.

  Prerequisites

  The IP addresses and passwords of all hosts to uninstall ICAgent have been collected, sorted in the iplist.cfg file, and uploaded to the /opt/ICAgent/ directory on the host that has ICAgent installed. Each IP address and password in the iplist.cfg file must be separated by a space. Examples:

  192.168.0.109 Password (Replace the IP address and password with the actual ones)
  192.168.0.39 Password (Replace the IP address and password with the actual ones)

  • The iplist.cfg file contains sensitive information. You are advised to clear it after using it.
  • If all hosts share a password, list only IP addresses in the iplist.cfg file and enter the password manually during execution. If one of the hosts uses a different password, type the password behind its IP address.

  Procedure

  1. Run the following command on the host that has ICAgent installed:

     bash /opt/oss/servicemgr/ICAgent/bin/remoteUninstall/remote_uninstall.sh -batchModeConfig /opt/ICAgent/iplist.cfg

     Enter the default password for user root of the hosts to uninstall ICAgent. If the passwords of all hosts have been configured in the iplist.cfg file, press Enter to skip this step.

     Wait until the message "Uninstall ICAgent success" is displayed, which indicates that ICAgent is successfully uninstalled from all the servers listed in the configuration file.

     However, ICAgent on the server where the uninstallation operation is performed will not be uninstalled. You need to uninstall it from the server separately.

  2. Choose Host Management > Hosts in the navigation pane of the LTS console to check the ICAgent status.

Checking the ICAgent Status

In the navigation pane, choose Host Management > Hosts. Click the Intra-Region Hosts or Extra-Region Hosts tab based on your host's location, locate your host, and check its ICAgent status. For status details, see Table 1.