vRealize Automation IaaS uses agents to integrate with external systems and to manage information among vRealize Automation components.
A common approach is to install vRealize Automation agents on the IaaS Windows server that hosts the active Manager Service, but it is not required. Multiple agents increase capacity and can be installed on the same or separate servers.
Virtualization Proxy Agents
vRealize Automation creates and manages virtual machines on virtualization hosts. Virtualization proxy agents send commands to, and collect data from, vSphere ESX Server, XenServer, and Hyper-V hosts, and the virtual machines provisioned on them.
A virtualization proxy agent has the following characteristics.
Typically requires administrator privileges on the virtualization platform that it manages.
Communicates with the IaaS Manager Service.
Is installed separately and has its own configuration file.
Most vRealize Automation deployments install the vSphere proxy agent. You might install other proxy agents depending on the virtualization resources in use at your site.
Virtual Desktop Integration Agents
Virtual desktop integration (VDI) PowerShell agents allow vRealize Automation to integrate with external virtual desktop systems. VDI agents require administrator privileges on the external systems.
You can register virtual machines provisioned by vRealize Automation with XenDesktop on a Citrix Desktop Delivery Controller (DDC), which allows the user to access the XenDesktop Web interface from vRealize Automation.
External Provisioning Integration Agents
External provisioning integration (EPI) PowerShell agents allow vRealize Automation to integrate external systems into the machine provisioning process.
For example, integration with Citrix Provisioning Server enables provisioning of machines by on-demand disk streaming, and an EPI agent allows you to run Visual Basic scripts as extra steps during the provisioning process.
EPI agents require administrator privileges on the external systems with which they interact.
Windows Management Instrumentation Agent
The vRealize Automation Windows Management Instrumentation (WMI) agent enhances your ability to monitor and control Windows system information, and allows you to manage remote Windows servers from a central location. The WMI agent also enables collection of data from Windows servers that vRealize Automation manages.