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    E-MapReduce:Use cluster templates

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    E-MapReduce:Use cluster templates

    Last Updated:Feb 28, 2026

    EMR on ECS cluster templates save cluster configurations -- such as software versions, instance types, and resource group assignments -- so you can recreate clusters with identical settings in three clicks instead of configuring each parameter again. All configuration items except passwords are saved. Templates support resource group assignment for project-level isolation.

    Limits

    Item

    Limit

    Templates per region

    30

    Password storage

    Not supported. Use key pairs for authentication.

    Instance locking

    Instance resources are not locked. Adjust configurations when you create a cluster from the template.

    Create a cluster template

    1. Go to the Manage Cluster Templates page.

      1. Log on to the E-MapReduce console.

      2. In the top menu bar, select the region and resource group.

      3. On the EMR on ECS page, click Manage Cluster Templates in the upper-right corner.image

    2. In the Manage Cluster Templates panel, click Create Template.

    3. On the Cluster Template page, complete the cluster configuration. In the Confirm Configuration step, enter a Cluster Template Name, select a Cluster Template Resource Group, and then click Create Cluster Template.

      Note

      • The template parameters are the same as those for creating a cluster. For more information, see Create a cluster.

      • For Cluster Template Resource Group, select an existing resource group or click Create Resource Group to create one.

      The Manage Cluster Templates panel displays the cluster templates for the current region and resource group.

      Column

      Description

      Template ID

      Automatically generated by the system.

      Template Name

      The custom name of the cluster template.

      Created At

      The time when the cluster template was created.

      Last Modification Time

      The time when the template was last modified and saved.

      Actions

      Create Cluster: Create a cluster from the template. Edit: Modify template configurations. Copy: Duplicate the template. Delete: Delete the template.

    Create a cluster from a template

    1. In the Manage Cluster Templates panel, find the target cluster template and click Create Cluster in the Actions column.

    2. In the Create Cluster dialog box, click OK.

      Note

      For subscription clusters, find the new cluster on the EMR on ECS page and complete the payment before the cluster creation process starts.

    3. On the EMR on ECS page, view the new EMR cluster. The default cluster name follows the format $Template name$ + Timestamp.

    4. If the template uses an unpublished EMR version, edit the template and select an active version before creating a cluster.

    FAQ

    • Does the new console support creating cluster templates for earlier Hadoop versions?

      No. Cluster templates are available only for the versions supported by the new console.

    • Can I configure a custom password in a template?

      No. For security reasons, templates require key pair authentication.

    • Can I modify instance types when creating a cluster from a template?

      Yes. Overwrite the instance configurations in the template when you create a cluster.

    References