When you frequently create E-MapReduce (EMR) clusters with the same configuration, recreating each cluster from scratch is time-consuming and error-prone. A cluster template stores a complete set of cluster settings — including software version, instance type, and key pair — so you can launch a consistently configured cluster without re-entering the same parameters each time. Templates store all configuration except passwords, which you provide at cluster creation time.
Create a cluster template
Prerequisites
Before you begin, ensure that you have:
-
Access to the EMR console
-
(Optional) An existing resource group, or permission to create one
Steps
-
Log on to the EMR console. In the left-side navigation pane, click EMR on ECS.
-
In the top navigation bar, select the region and resource group where you want to create the template. and select a resource group
-
On the EMR on ECS page, click Manage Cluster Templates.
-
In the Manage Cluster Templates panel, click Create Template.
-
Configure the cluster parameters. The parameters are the same as those for creating a cluster directly. For details, see Create a cluster.
-
In the Configuration Confirmation step, set the following parameters:
Parameter Description Cluster Template Name A name for the template. Must be 1–64 characters and can contain only letters, digits, hyphens (-), and underscores (_). Cluster Template Resource Group Select an existing resource group, or click Create Resource Group to create one. Resource groups help you organize and manage templates. -
Read the Terms of Service, select the check box, and then click Create Cluster Template.
The template appears in the Manage Cluster Templates panel under the current region and resource group.
Manage cluster templates
The Manage Cluster Templates panel displays the cluster templates that you created in the current region and that you managed in the current resource group.
| Parameter | Description |
|---|---|
| Template ID | A unique identifier automatically assigned by the system. |
| Template Name | The name you specified when creating the template. |
| Created At | The time when the template was created. |
| Last Modification Time | The time when the template was last modified. |
| Actions | Available actions for the template. |
From the Actions column, you can:
-
Create Cluster: Launch a new cluster using the template's saved configuration. See Create a cluster based on a cluster template.
-
Edit: Modify the template's configuration.
-
Copy: Duplicate the template.
-
Delete: Remove the template.
Limits
-
Each region supports up to 30 cluster templates.
-
Cluster templates support key pairs only. Passwords are not supported.