# Conceptual overview[¶](https://doc.dataiku.com/dss/latest/installation/cloudstacks-azure/concepts.html#conceptual-overview "Permalink to this headline")

## Fleet Manager (FM)[¶](https://doc.dataiku.com/dss/latest/installation/cloudstacks-azure/concepts.html#fleet-manager-fm "Permalink to this headline")

The Dataiku Cloud Stacks for Azure setup uses a central component, called Dataiku Fleet Manager (FM) in order to deploy, upgrade, backup, restore and configure one or several Dataiku instances.

Fleet Manager handles the entire lifecycle of the Dataiku instances, freeing you from most administration tasks. The instances managed by Fleet Manager come builtin with the ability to scale computation on elastic computation clusters, powered by Kubernetes.

To deploy Dataiku Cloud Stacks for Azure, Dataiku provides an ARM template that deploys Fleet Manager. From Fleet Manager, you then deploy the Dataiku instances.

## Instance[¶](https://doc.dataiku.com/dss/latest/installation/cloudstacks-azure/concepts.html#instance "Permalink to this headline")

An instance is a single installation of a DSS design node, automation node or deployer node. It is the main object manipulated by FM. Each instance is backed by a virtual machine dedicated to it.

When you create an instance, you *provision* it. Provisioning an instance means FM creates the required cloud resources to host the DSS node. See instances lifecycle for more information.

## Instance template[¶](https://doc.dataiku.com/dss/latest/installation/cloudstacks-azure/concepts.html#instance-template "Permalink to this headline")

An instance template is a set of configuration information that can be reused to start several instances with common properties. An instance is always launched from an instance template and stays linked to it throughout its lifetime.

Modifying an instance template impacts the provisioning behavior of all the instances launched from it. Reprovisioning is not enforced, but required for the new setup to be applied.

## Virtual network[¶](https://doc.dataiku.com/dss/latest/installation/cloudstacks-azure/concepts.html#virtual-network "Permalink to this headline")

A virtual network represents the network context in which the instances will be launched. That means a reference to the virtual network used in the cloud provider, but also other configurations such as how DNS and HTTPS are handled.

Instance templates are not tied to a specific virtual network.

## Agent[¶](https://doc.dataiku.com/dss/latest/installation/cloudstacks-azure/concepts.html#agent "Permalink to this headline")

The FM agent is a Dataiku software that runs alongside DSS in your instances. It manages communication with the FM server, sends technical information to it, and performs administrative tasks on behalf of the FM server authority.
