Installing ICAgent (Intra-Region Hosts)

To use LTS to collect logs (such as host metrics, container metrics, node logs, container logs, and standard output ) from intra-region hosts, you must install ICAgent on them. ICAgent is a log collection tool for LTS. It runs on hosts where logs need to be collected.

Prerequisites

Before installing ICAgent, ensure that the time and time zone of your local browser are consistent with those of the host. If they are inconsistent, errors may occur during log reporting.

Installation Methods

There are two methods to install ICAgent.

**Table 1** Installation methods
Method	Scenario
Initial installation	You can use this method to install ICAgent on a host that has no ICAgent installed. Run the following command on the host. If no ICAgent process is displayed, no ICAgent has been installed on the host. ps -aux \| grep icagent
Inherited installation (supported only for Linux hosts)	When ICAgent has already been installed on one host but needs to be installed on multiple hosts, you can use this method.

Initial Installation (Linux)

Log in to the management console and choose Management & Deployment > Log Tank Service.
Choose Host Management > Hosts in the navigation pane.
Click Install ICAgent in the upper right corner.

Before installing ICAgent, ensure that the time and time zone of your local browser are consistent with those of the host.

Figure 1 Installing ICAgent
Set Host to Intra-region hosts.
Set OS to Linux.
If you set Installation Mode to Obtain AK/SK, perform this step. Obtain an access key (AK/SK) in advance. You need to enter it when installing ICAgent. AK is used together with SK to sign requests cryptographically, ensuring that the requests are secret, complete, and correct. Ensure that the public account and AK/SK will not be deleted or disabled. If the AK/SK is deleted, ICAgent cannot report data to LTS.

For details, see How Do I Obtain an Access Key (AK/SK)?

VPC endpoints are secure and private channels for connecting VPCs to VPC endpoint services. To connect AOM and LTS using a VPC endpoint, create one by referring to How Do I Create a VPC Endpoint on the VPCEP Console?
If you set Installation Mode to Create an agency, this step is required. In this installation mode, you do not need to obtain and enter an AK/SK. ICAgent automatically obtains an AK/SK during agency creation.

For details, see How Do I Install ICAgent by Creating an Agency?
On the Install ICAgent page, click Copy Command to copy the ICAgent installation command.
Log in as user root to the host which is deployed in the region same as that you are logged in to (by using a remote login tool such as PuTTY) and run the copied command. If you have chosen Obtain AK/SK as the installation mode, enter the AK/SK as prompted.
- When message "ICAgent install success" is displayed, ICAgent has been installed in the /opt/oss/servicemgr/ directory of the host.
- If the installation fails, uninstall ICAgent and then install it again. For details, see Uninstalling ICAgent.
Choose Host Management > Hosts in the navigation pane of the LTS console and check whether the host's ICAgent status is Running.

Initial Installation (Windows)

On the Hosts page of the LTS console, click Install ICAgent in the upper right corner.
Set Host to Intra-region hosts.
Set OS to Windows.
You can download it to the local PC by clicking the name of the package or visiting the download URL.
Save the ICAgent installation package to a directory on the target host, for example, C:\ICAgent, and decompress the package.
Obtain an AK/SK. For details, see How Do I Obtain an Access Key (AK/SK)?
On the Install ICAgent page, click Copy Command to copy the ICAgent installation command to the local PC and replace the AK/SK in the command with the obtained one.
Open the Command Prompt, go to the directory where the ICAgent installation package is decompressed, and run the copied command.
If the message "Service icagent installed successfully" is displayed, the installation is successful.
- If you have installed a third-party antivirus software, add ICAgent as a trusted program. Otherwise, ICAgent installation may fail.
- To uninstall ICAgent, go to the \ICProbeAgent\bin\manual\win directory where the ICAgent installation package was decompressed, and double-click the script named uninstall.bat. When the message "icagent removed successfully" is displayed, the uninstallation is successful.
  Uninstalling ICAgent does not delete the files in the corresponding directories. You need to delete them manually if necessary.
- To check the ICAgent status, go to the directory where the ICAgent installation package was decompressed, open the Command Prompt, and run the sc query icagent command. If RUNNING is returned, ICAgent is running. If the message "The specified service does not exist as an installed service" is displayed, ICAgent has been uninstalled.
- If you reinstall ICAgent after uninstallation and find that the ICAgent status remains pending, end the icagent.exe process in Task Manager and try installation again.
Choose Host Management > Hosts in the navigation pane of the LTS console and check whether the host's ICAgent status is Running.

Inherited Installation (Linux)

Assume that you need to install ICAgent on multiple hosts, and one of the hosts already has ICAgent installed. The ICAgent installation package, ICProbeAgent.tar.gz, is in the /opt/ICAgent/ directory. To install ICAgent on other hosts one by one:

Run the following command on the host where ICAgent has been installed, where x.x.x.x is the IP address of the host you want to install ICAgent on.
```
bash /opt/oss/servicemgr/ICAgent/bin/remoteInstall/remote_install.sh -ip x.x.x.x
```
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 installation 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 remotely communicate with the remote host to install ICAgent.
- When message "ICAgent install success" is displayed, ICAgent has been installed in the /opt/oss/servicemgr/ directory of the host. You can then choose Host Management > Hosts in the navigation pane of the LTS console to check the ICAgent status.
- If "ICAgent install success" is not displayed, the installation fails. Uninstall ICAgent and install it again. For details, see Uninstalling ICAgent.

Batch Inherited Installation (Linux)

The hosts must all belong to the same VPC and be on the same subnet.
Python 3.* is required for batch installation. If you are prompted that Python cannot be found during ICAgent installation, install Python of a proper version on the host and try again.

Prerequisites

The IP addresses and root's passwords of all hosts to install ICAgent have been collected, sorted in the iplist.cfg file, and uploaded to the /opt/ICAgent/ directory on the host that has ICAgent installed. An IP address and the password of a host's user root 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 servers share the same password, the iplist.cfg file only needs to include the IP addresses, not passwords. You need to enter the password during execution. If an IP address has a different password, enter the password after the IP address.

Perform the following operations:

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

bash /opt/oss/servicemgr/ICAgent/bin/remoteInstall/remote_install.sh -batchModeConfig /opt/ICAgent/iplist.cfg

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

batch install begin
Please input default passwd:
send cmd to 192.168.0.109
send cmd to 192.168.0.39
2 tasks running, please wait...
2 tasks running, please wait...
2 tasks running, please wait...
End of install agent: 192.168.0.39
End of install agent: 192.168.0.109
All hosts install icagent finish.

Wait for a while. When message "All hosts install icagent finish." is displayed, ICAgent has been installed on all the hosts listed in the configuration file.