Creating a Cluster on OpenStack
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Create a cluster on OpenStack

Use these steps to create a cluster with Cloudbreak.

If you experience problems during cluster creation, refer to Troubleshooting cluster creation.


This prerequisite step is required for AWS GovCloud users only and is optional for other AWS users.

If you are planning to create clusters on AWS GovCloud, you must first prepare a custom image and register a custom image catalog with Cloudbreak. For instructions, refer to Custom images.


  1. Log in to the Cloudbreak UI.
  2. Click the Create Cluster button and the Create Cluster wizard is displayed.

    By default, the Basic view is displayed. To view advanced options, click Advanced. To learn about advanced options, refer to Advanced cluster options.

  3. On the General Configuration page, specify the following general parameters for your cluster:
    Parameter Description
    Select Credential Choose a previously created credential.
    Cluster Name Enter a name for your cluster. The name must be between 5 and 40 characters, must start with a letter, and must only include lowercase letters, numbers, and hyphens.


    Select the region in which you would like to launch your cluster.
    Platform Version Choose the HDP or HDF version to use for this cluster. Blueprints available for this platform version will be populated under “Cluster Type” below. If you selected the HDF platform, refer to Creating HDF clusters for HDF cluster configuration tips.
    Cluster Type Choose one of the default cluster configurations, or, if you have defined your own cluster configuration via Ambari blueprint, you can choose it here. For more information on default and custom blueprints, refer to Custom blueprints.
    Flex Subscription This option will appear if you have configured your deployment for a flex subscription.
  4. On the Hardware and Storage page, for each host group provide the following information to define your cluster nodes and attached storage. To edit this section, click on the . When done editing, click on the to save the changes.
    Parameter Description
    Ambari Server You must select one node for Ambari Server by clicking the button. The “Instance Count” for that host group must be set to “1”. If you are using one of the default blueprints, this is set by default.
    Instance Type Select an instance type.
    Instance Count Enter the number of instances of a given type. Default is 1.
    Storage Type Select the volume type.
    Attached Volumes Per Instance Enter the number of volumes attached per instance. Default is 1.
    Volume Size Enter the size in GB for each volume. Default is 100.
  5. On the Network and Availability page, provide the following to specify the networking resources that will be used for your cluster:
    Parameter Description
    Select Network Select the virtual network in which you would like your cluster to be provisioned. You can select an existing network or create a new network.
    Select Subnet Select the subnet in which you would like your cluster to be provisioned. If you are using a new network, create a new subnet. If you are using an existing network, select an existing subnet.
    Subnet (CIDR) If you selected to create a new subnet, you must define a valid CIDR for the subnet. Default is

    Cloudbreak uses public IP addresses when communicating with cluster nodes.

  6. On the Gateway Configuration page, you can access gateway configuration options.

    When creating a cluster, Cloudbreak installs and configures a gateway (powered by Apache Knox) to protect access to the cluster resources. By default, the gateway is enabled for Ambari; You can optionally enable it for other cluster services.

    For more information, refer to Gateway configuration documentation.

  7. On the Network Security Groups page, define security groups for each host group. You can either create new security groups and define their rules or reuse existing security groups:
    Option Description
    New Security Group (Default) Creates a new security group with the rules that you defined:
    • A set of default rules is provided. You should review and adjust these default rules. If you do not make any modifications, default rules will be applied.
    • You may open ports by defining the CIDR, entering port range, selecting protocol and clicking +.
    • You may delete default or previously added rules using the delete icon.
    • If you don't want to use security group, remove the default rules.
    Existing Security Groups Allows you to select an existing security group that is already available in the selected provider region. This selection is disabled if no existing security groups are available in your chosen region.

    The default experience of creating network resources such as network, subnet and security group automatically is provided for convenience. We strongly recommend you review these options and for production cluster deployments leverage your existing network resources that you have defined and validated to meet your enterprise requirements. For more information, refer to Restrict inbound access to clusters.

  8. On the Security page, provide the following parameters:
    Parameter Description
    Cluster User You can log in to the Ambari UI using this username. By default, this is set to admin.
    Password You can log in to the Ambari UI using this password.
    Confirm Password Confirm the password.
    New SSH public key Check this option to specify a new public key and then enter the public key. You will use the matching private key to access your cluster nodes via SSH.
    Existing SSH public key Select an existing public key. You will use the matching private key to access your cluster nodes via SSH. This is a default option as long as an existing SSH public key is available.
  9. Click on Create Cluster to create a cluster.
  10. You will be redirected to the Cloudbreak dashboard, and a new tile representing your cluster will appear at the top of the page.