If you use an image to deploy a host, a serial number is automatically generated for the host after the Cloud Monitor plug-in is installed. If you use the same image to deploy multiple third-party hosts, Cloud Monitor may fail to identify the hosts.
To resolve the issue, perform one of the following system-specific operations:
Windows
Delete the key-value pair serial_number in the Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\cloudmonitor directory of the registry.
Linux
Delete the serial_number.properties file in the /etc/cloudmonitor directory.