# Cluster Blueprint

A **Virtualized Cluster** in <code class="expression">space.vars.product\_name</code> is a group of hypervisor hosts that virtual machines get provisioned on.

You can create one or more virtualized clusters per region. You can also further slice a cluster into multiple subgroups of hosts using [Host Aggregates](https://docs.platform9.com/private-cloud-director/2025.4/virtualized-clusters/host-aggregate). This allows you to combine hosts with similar characteristics into a cluster or a host aggregate within a cluster and target VM provisioning to that cluster or aggregate.

## What is Cluster Blueprint

A cluster blueprint allow you to describe common configure that all virtualized clusters will share in a declarative, prescriptive manner. Blueprint is designed to help you express your desired cluster architecture upfront, and ensure that cluster capacity that is added over time conforms to this desired architecture.

## Create a Cluster Blueprint

To deploy and use a **virtualized cluster**, your first step will be to create a cluster blueprint.

Navigate to Infrastructure -> Cluster Blueprints in the <code class="expression">space.vars.product\_name</code> UI to create your cluster blueprint.

Follow the details in [Networking Configuration](https://docs.platform9.com/private-cloud-director/2025.4/virtualized-networking/networking-overview#networking-configuration) to find out more about configuring networking service as part of the cluster blueprint configuration.

Follow the details in [Block Storage Service Configuration](https://docs.platform9.com/private-cloud-director/2025.4/storage/block-storage-options---configuration#block-storage-service-configuration) to learn about creating one or more storage types as part of cluster blueprint.

### Customize Cluster Defaults

Clusters have additional default properties, which most users will not need to change. But you can customize these based on your requirements.