The vSphere Management Assistant (vMA) is a virtual machine that includes prepackaged software such as a Linux distribution, the vSphere command‐line interface, and the vSphere SDK for Perl. Basically it is the missing service console for ESXi. But it’s more than that too.
This allows administrators to run scripts or agents that interact with ESX/ESXi and vCenter Server systems without having to explicitly authenticate each time. vMA can also collect ESX/ESXi and vCenter Server logs and store the information for analysis.
This latest video provides an overview of vMA and demonstrates the fastpass feature, which allows you to pass commands to the host or run scripts on the host and only enter the credentials one time. The video also demonstrates the vi-logger feature, which periodically collects the logs from the hosts it manages.
For more information and context, continue reading vSphere Management Assistant Documentation.