check_esx_wbem
Running (free) VMware ESXi don't let you install your own manufacturer agents (Dell Openmanage for example). By using this python script which queries VMware CIM agent you can monitor your hardware's global health.
Requirements
python with pywbem module
Usage
./check_esx_wbem.py hostname user password [verbose]
Example
./check_esx_wbem.py https://myesxi:5989 root password