7.0

Table 4‑4. IaaS Components (Continued)
Component Description
Distributed Execution Managers (Orchestrator and Worker) A Distributed Execution Manager (DEM) executes the business
logic of custom models, interacting with the IaaS database and
external databases. DEMs also manage cloud and physical
machines.
Agents Virtualization, integration, and WMI agents that communicate
with infrastructure resources.
Certificate Trust Requirements in a Distributed Deployment
For secure communication, vRealize Automation relies on certificates to create trusted relationships
among components.
The specific implementation of the certificates required to achieve this trust depends on your
environment.
To provide high availability and failover support, you might deploy load-balanced clusters of components.
In this case, you obtain a multi-use certificate that includes the IaaS Web component in the cluster, and
then copy that multi-use certificate to each component in the cluster. You can use Subject Alternative
Name (SAN) certificates, wildcard certificates, or any other method of multi-use certification appropriate
for your environment as long as you satisfy the trust requirements. Depending on your load balancer
configuration, you may need to certify the load balancer as part of the multi-use certificate for the cluster.
For example, if you have a load balancer configuration that requires a certificate on the load balancer as
well as its components, you might obtain a SAN certificate to certify web-load-
balancer.eng.mycompany.com, web-component-1.eng.mycompany.com, and web-
component-2.eng.mycompany.com. You would copy that single multi-use certificate to the load balancer
and each of the appliances and then register the certificate on the Web component machines.
The Certificate Importation and Registration table summarizes the registration requirements for various
imported certificates.
Table 4‑5. Certificate Importation and Registration
Import Register
vRealize Automation appliance cluster Web components cluster
Web components cluster
n
vRealize Automation appliance cluster
n
Manager Service components cluster
n
DEM Orchestrators and DEM Worker components
Manager Service components cluster
n
DEM Orchestrators and DEM Worker components
n
Agents and Proxy Agents
Installation Worksheets
You can use these worksheets to record important information for reference during the installation
process.
Installing vRealize Automation
VMware, Inc. 62