In a distributed installation, the system administrator deploys virtual appliances and related components to support the deployment environment.

Table 1. Virtual Appliances and Appliance Database

Component

Description

Single Sign-On Server

Identity Appliance, a preconfigured virtual appliance that provides Single Sign-On capabilities.

Alternatively, you can use some versions of the SSO provided with vSphere. For information on supported versions, see vRealize Automation Support Matrix.

vRealize Appliance

A preconfigured virtual appliance that deploys the vRealize Automation server. The server includes the vRealize Automation console, which provides a single portal for self-service provisioning and management of cloud services, as well as authoring and administration.

Appliance Database

Stores information required by the virtual appliances. The database is embedded on one or two vRealize Appliances.

You can select the individual IaaS components you want to install and specify the installation location.

Table 2. IaaS Components

Component

Description

Website

Provides the infrastructure administration and service authoring capabilities to the vRealize Automation console. The Website component communicates with the Model Manager, which provides it with updates from the Distributed Execution Manager (DEM), proxy agents and database.

Manager Service

The Manager Service coordinates communication between agents, the database, Active Directory (or OpenLDAP), and SMTP. The Manager Service communicates with the console Web site through the Model Manager. This service requires administrative privileges to run.

Model Manager

The Model Manager communicates with the database, the DEMs, and the portal website. The Model Manager is divided into two separately installable components — the Model Manager Web service and the Model Manager data component.

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.