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title: Create Clusters in Runtime Manager
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product: Runtime Manager
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# Create Clusters in Runtime Manager

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

[![logo hybrid active](/mulesoft/current/en-us/_/img/icons/hybrid-cloud.svg "Hybrid")Hybrid](deployment-strategies#hybrid-deployments)[ ![logo server active](/mulesoft/current/en-us/_/img/icons/server-cloud.svg "Anypoint Platform PCE")Private Cloud Edition](deployment-strategies#anypoint-platform-private-cloud-edition)

To deploy applications to a cluster, add the servers to Runtime Manager first and then create the
cluster. You need to add at least one server to create a cluster.

> [!IMPORTANT] When you add a server to a unicast cluster, all existing servers in the cluster are
> restarted.

For Object Store persistence on all the servers in your cluster, create your cluster manually and
use Quorum Management.

## Restrictions

Before you add servers to a cluster, note the following restrictions:

- Servers cannot contain any previously deployed applications.

- Servers cannot belong to another cluster or group.

- Multicast servers can be in the **Running** or **Disconnected** state.

- Unicast servers must be in the Running state.

- All servers in a cluster must be running the same versions of:

  - Mule runtime engine (including monthly update)

  - Runtime Manager agent

  - Java

    For information about monthly updates, see
    [Monthly Date-Patch Updates](https://docs.mulesoft.com/cloudhub/cloudhub-app-runtime-version-updates#monthly-date-patch-updates).

## Create a Cluster

To create a cluster:

1.  From Anypoint Platform, select **Runtime Manager**.

2.  Select **Servers** in the menu.

3.  Click the **Create Cluster** button:

    ![Create Cluster button](/mulesoft/current/en-us/runtime-manager/_images/rtm-cluster-create.png)

    Figure 1. The arrow shows the **Create Cluster** button on the **Servers** page.

4.  In the **Create Cluster** page, enter the name for the cluster.

    Cluster names can contain between 3-40 alphanumeric characters (a-z, A-Z, 0-9) and hyphens (-).
    They cannot start or end with a hyphen and cannot contain spaces or other characters.

5.  Select **Unicast** or **Multicast**.

6.  Select the servers to include in your new cluster.

7.  Click the **Create Cluster** button.

The new cluster appears in the **Servers** list. The servers no longer appear in the **Servers**
list. To see the list of servers in the cluster, click the cluster name.

## See Also

- [Clusters](https://docs.mulesoft.com/runtime-manager/cluster-about)

- [Add Servers to Runtime Manager](https://docs.mulesoft.com/runtime-manager/servers-create)

- [Object Store Persistence](https://docs.mulesoft.com/on-premises/latest/creating-and-managing-a-cluster-manually#object-store-persistence)

- [Quorum Management](https://docs.mulesoft.com/on-premises/latest/creating-and-managing-a-cluster-manually#quorum-management)

- [Shut Down, Restart, or Delete Servers](https://docs.mulesoft.com/runtime-manager/servers-actions)

- [Deployment and Server Scaling](https://docs.mulesoft.com/runtime-manager/runtime-dep-serv-limits)